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WO2002065622A1 - Procede et dispositif auxiliaire destines au retrait d'une bobine - Google Patents

Procede et dispositif auxiliaire destines au retrait d'une bobine Download PDF

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Publication number
WO2002065622A1
WO2002065622A1 PCT/JP2001/004615 JP0104615W WO02065622A1 WO 2002065622 A1 WO2002065622 A1 WO 2002065622A1 JP 0104615 W JP0104615 W JP 0104615W WO 02065622 A1 WO02065622 A1 WO 02065622A1
Authority
WO
WIPO (PCT)
Prior art keywords
coil
temperature
core
gas
heating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2001/004615
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English (en)
Japanese (ja)
Inventor
Yutaka Nakaya
Hiroshi Fujigiwa
Fumihisa Akai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DAIWA ELECTRONICS CO LTD
Taga Manufacturing Co Ltd
Original Assignee
DAIWA ELECTRONICS CO LTD
Taga Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by DAIWA ELECTRONICS CO LTD, Taga Manufacturing Co Ltd filed Critical DAIWA ELECTRONICS CO LTD
Priority to JP2002564820A priority Critical patent/JPWO2002065622A1/ja
Publication of WO2002065622A1 publication Critical patent/WO2002065622A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/50—Disassembling, repairing or modifying dynamo-electric machines
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/001—Dry processes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • the present invention belongs to the technical field related to remodeling or repair of an electric device provided with a coil such as a motor or a transformer, and more specifically to the technical field of extracting a coil from a core on which the coil is wound.
  • motors and transformers may cause insulation failure when used for many years.
  • mass-produced general-purpose motors may require changes in frequency, voltage, etc. when installed for driving various devices.
  • it is practiced to re-roll the coils of the motor stator and transformer. At the time of this coil winding, it is necessary to take out the existing coil which has been wound.
  • the AC motor 110 which is frequently used as a general purpose motor, has a shape as shown in FIG.
  • the fan cover is divided into components such as 1 1 5.
  • a stator in which a coil is wound is incorporated inside the stator frame W.
  • the coil a of the stator S incorporated in the motor 110 is a groove formed by opening on the inner circumferential surface of the cylindrical stator core b ( Slotted slot c) is penetrated with adhesive d and insulating material e.
  • the coil a is passed through the groove c and impregnated with the adhesive d including the inside of the coil to form the stator S.
  • the coil a, the adhesive d, and the bundle of the insulating material e are firmly fixed to the groove c, and particularly in a motor called a cage AC motor, the groove c of the stator core b is an opening on the inner peripheral surface
  • the coil a is pulled from the groove c of the stator core b because it is narrowed toward the There are considerable difficulties in taking out.
  • the bonding agent d is used to absorb the vibration of the stator S by bonding a large number of wires and to further ensure insulation by the insulating material e.
  • the transformer H has a structure in which a coil aa on the primary side and a coil ab on the secondary side are wound opposite to a rectangular frame-shaped iron core g.
  • the coils aa and ab are firmly fixed by the adhesive d. Although these coils do not enter the grooves as with the motor, they can not be pulled out in one direction, so removal of the coils is not easy.
  • the device of the above method is shown in Japanese Patent Application Laid-Open No. 53-12011. Further, although a gas burner is not used, an apparatus for mechanically pushing a coil from an iron core is disclosed in Japanese Patent Application Laid-Open No. 3-155355. Further, according to JP-A-H06-121435, a core with coil is placed in a sealed container, the inside is replaced with nitrogen gas to heat the inside of the container, and heating is completed after completion of heating. The technology of taking out the iron core and taking the coil from the iron core is shown.
  • the fixing agent d consisting of an epoxy resin, a silicone varnish, etc. may be burned and carbonized by a gas pana flame, a new iron core is used. Carbides are deposited and formed, which prolongs the working time, generates harmful gases and degrades the working environment.
  • stator core b Furthermore, there is a problem that the magnetic properties (magnetostriction, relative permeability, resistivity, etc.) of the stator core b are adversely affected by heating, which causes performance degradation of the motor.
  • the present invention has been made in consideration of such problems, and it is possible to shorten the operation time for taking out the coil from the core to which the coil is fixed, and to take out the coil easily and safely. It is an object of the present invention to provide a coil extraction assisting apparatus suitable for carrying out the method of Disclosure of the invention
  • the method for taking out a coil according to the present invention is a method in which a core wound with a coil is placed in an atmosphere of noncombustible gas, the coil is electrically heated, and a coil fixed with a binder is taken out from the core.
  • the bonding agent when the bonding agent is heated to a high temperature, the bonding agent may be fluidized, liquefied or gasified as in a semi-molten state. The fluidized or liquefied binder drops from the core downward.
  • gasification in the case of evaporation as a complete gas, or in the form of liquid particles instead of a complete gas, or the adhesive becomes fine particles and diffuses into non-combustible gas and spreads.
  • the noncombustible gas is a gas that does not contain at least oxygen, and is a gas that has the property of not burning or carbonizing the bonding agent even when the temperature of the bonding agent becomes fluid, liquid or gasified.
  • the coil can be taken out without burning or carbonizing the fixing agent.
  • the fluidization, liquefaction or gasification of the adhesive is performed by electric heating of the coil, it is possible to prevent the core from being unnecessarily heated.
  • the melting point and boiling point of the adhesive are lower than the enamel insulation coated on the copper wire of the coil, and the electric heating causes an electrification failure such as a short circuit before the adhesive is fluidized, gasified or liquefied. There is no.
  • the core is a motor stator or a transformer.
  • the coil is taken out from the stator of the motor or the transformer by the above method.
  • the noncombustible gas is an inert gas, water vapor, or a mixed gas of an inert gas and water vapor.
  • the temperature rising core is not adversely affected by the effect of the heating coil.
  • the water vapor referred to here is, as is well known, that water boils at 100 ° C. and becomes water vapor at atmospheric pressure under atmospheric pressure, and in order to maintain the state of water vapor, it is 100 ° C. It is necessary to hold C or more . Further, water vapor exceeding 100 ° C. is called heating water vapor, and the water vapor in the present invention contains heating water vapor.
  • Water vapor is an inert gas at atmospheric pressure, and when cooled, it partially condenses and returns to water.
  • the coil extraction method of the present invention at least one or both of the temperature of the coil and the temperature of the core are detected when the coil is heated by electric conduction, and the electric heating is performed so that the coil can be extracted.
  • the heating of the coil is controlled so that the magnetic properties of the core are not easily deteriorated.
  • the coil extraction method of the present invention is characterized in that the coils are electrically heated so as to make the calorific value of the plurality of coils uniform.
  • a plurality of coils are used for the motor.
  • the coil extraction assisting device of the present invention comprises: a processing chamber for accommodating a core wound with a coil; a gas supply means for supplying a noncombustible gas to the processing chamber; And will be equipped.
  • the coil extraction assisting device of the present invention is characterized in that the core is a stator of a motor or a transformer. As a result, the coil is taken out of the motor stator or the transformer using the takeout auxiliary device. Further, the coil extraction assisting device of the present invention is characterized in that the noncombustible gas is an inert gas, water vapor, or a mixed gas of an inert gas and water vapor. As a result, the device does not adversely affect the core whose temperature rises due to the effect of the heating coil.
  • the water vapor referred to here is the water vapor as described in the coil extraction method of the present invention.
  • the coil extraction assisting device of the present invention is characterized in that a coil temperature is detected.
  • the coil temperature or core temperature or both are detected as the coil is energized and heated, and energization of the coil is controlled by the controller instruction to prevent overheating of the core.
  • the coil extraction assisting device of the present invention is characterized in that the electric heating means comprises a switching circuit for switching electric heating to a plurality of coils. As a result, the coil to be energized and heated is selected by the switching of the switching circuit to be energized and heated.
  • the coil extraction assisting device of the present invention is characterized in that the gas supply means comprises at least two supply paths different in temperature of the supplied gas. In this way, non-combustible gases of different temperatures are used to rapidly change the temperature of the processing chamber.
  • the electric heating means comprises a power supply section which uses an alternating current to heat the coil, and a frequency changing means capable of changing the frequency of the alternating current. It is characterized by Thus, the coil is energized and heated by the alternating current, and the frequency of the alternating current is given a frequency suitable for the energization heating of the coil.
  • FIG. 1 is a configuration diagram showing a first example of an embodiment of a coil extraction method and an auxiliary extraction device according to the present invention.
  • FIG. 2 is a configuration diagram regarding control of the main part of FIG.
  • FIG. 3 is an electric circuit diagram of the main parts of FIGS. 1 and 2.
  • FIG. 4 is another electric circuit diagram of the main parts of FIGS. 1 and 2.
  • FIG. 5 is another electric circuit diagram of the main part of FIGS. 1 and 2.
  • FIG. 6 is a flow chart showing a control example in the embodiment of the coil extraction method and the auxiliary extraction device according to the present invention.
  • FIG. 7 is a flowchart of the continuation of FIG.
  • FIG. 8 is a continuation of the flowchart of FIG.
  • FIG. 9 is a flowchart of the continuation of FIG.
  • FIG. 10 is a cross-sectional view showing a winding structure of a coil in a general motor stator.
  • FIG. 11 is a configuration diagram regarding control of the main part of FIG. 1;
  • FIG. 12 is a perspective view showing an outline of a general transformer.
  • FIG. 13 is an electrical circuit diagram of a general transformer.
  • FIG. 14 is a perspective view showing the appearance of a typical mobile.
  • FIG. 15 is an exploded perspective view of FIG.
  • FIG. 16 is a configuration diagram showing a second example of the embodiment of the method for taking out a coil and the auxiliary taking-out device according to the present invention.
  • FIG. 17 is a configuration diagram showing a third example of the embodiment of the coil extraction method and the auxiliary extraction device according to the present invention.
  • 1 to 15 show a first example of the best mode for carrying out the present invention.
  • the coil extraction assisting device 100 of the first example is a temperature sensor which is a processing chamber 1, a gas supply means 2, an electrification heating means 3 and a core temperature detecting means. 4, mainly composed of an oxygen concentration sensor 5, a controller 6, a coil temperature detection means 62, and an exhaust treatment means 7.
  • a coil extraction assist device 100 will be described by taking a stator core b of a motor as an example of a core for extracting the coil a.
  • the processing chamber 1 places the stator frame W including the stator S to which the coil a is fixed with the adhesive d under an atmosphere of noncombustible gas, and one stator frame W is accommodated. It consists of an airtight container provided with Usually, since the stator S is fixed so as not to be disassembled with the stator frame W, it is desirable to enter the processing chamber 1 as it is. In addition, three air supply ports 1 1, 1 2, 1 3 and one exhaust port 14 connected to the outside are opened in the processing chamber 1, and a part of the processing chamber 1 is provided with a stator S There is an open / close door (not shown) for taking in and out. In addition, inside the processing chamber 1, a connection terminal 15 to which the lead L of the coil a of the stator S can be connected is attached.
  • the gas supply means 2 is for supplying and filling a non-combustible gas, here an inert gas, in the processing chamber 1, and a bomb 21 filled with nitrogen gas N, which is one of the inert gases,
  • the supply path 22 is composed of the second supply path 23 and the third supply path 24.
  • nitrogen gas N is inactive at room temperature but not strictly (chemically) inert gas at high temperatures.
  • this invention also uses it in that sense.
  • the first supply path 22 is connected to one air supply port 1 1 of the processing chamber 1 and is connected to a solenoid valve 2 2 a which is a flow control valve also serving as an on-off valve.
  • a pressurized air supply path 25 is branched and connected to the first supply path 22 between the solenoid valve 2 2 a and the air inlet 11 of the processing chamber 1.
  • the pressurized air supply path 25 is connected to the compressor 25 b via the solenoid valve 25 a which is a flow rate adjusting valve also serving as an on-off valve, and the electric heating is ended and the gas in the processing chamber 1 is predetermined. After the temperature has been lowered, pressurized air can be supplied so that the stator core b can be cooled efficiently.
  • the second supply path 23 is connected to the other one air supply port 12 of the processing chamber 1 and heats the nitrogen gas N and the solenoid valve 23 a which is a flow control valve also serving as an on-off valve. Heat sink 2 3 b is connected.
  • the third supply path 24 is connected to the remaining one air supply port 13 of the processing chamber 1 and includes a solenoid valve 24a which is a flow control valve also serving as an on-off valve and a heater for heating nitrogen gas N 2 4 b is connected.
  • a common heating source is used for the heater 23 b of the second supply path 23 and the heater 24 b of the third supply path 24. 26 are connected.
  • the heating source 26 is configured to feed pack a signal such as a temperature sensor (not shown) to control the heating temperature of the nitrogen gas N.
  • the heating means 3 is for heating and heating the coil a of the stator S housed in the processing chamber 1 and connected to the switching circuit 31 connected to the connection terminal 15 of the processing chamber 1 and the switching circuit 31 Power supply unit 32 and
  • the switching circuit 31 shown in FIGS. 3 to 5 is a circuit diagram in the case of using a single-phase AC power supply, and is shown in FIG. 1, FIG. 2, FIG. 11, FIG. A power supply unit 32 shown in the figure shows a single-phase AC power supply that outputs.
  • the switching circuit 31 is supplied with power from the power supply section 32 via the terminals 31 1 and 32 1, and is connected to the connection terminal 15 via the switches 15 a, 15 b and 15 c.
  • 3 1 and 3 lead wires provided to the three-phase AC motor 3 pairs of switches 3 1 a and 3 1 a ', 31 1 b and 3 1 b, and 3 1 c
  • 3 1 c ' is provided, and one set of switches 3 1 a and 3 1 a', 3 1 b and 3 1 b ', 3 1 c and 3 1 c' according to the coil connection method.
  • the coil is heated electrically.
  • the switch circuit 31 shown in FIG. 3 is used, and electric heating is performed for every two coils. Specifically, coil a 1 and coil a 2 are energized and heated by turning on switches 3 1 a and 3 1 a ′, and after a predetermined time, switch N 3 1 b and 3 1 b ′ are switched on.
  • the coil a 2 and the coil a 3 are energized and heated, and after a predetermined time, the switches 31 c and 31 c ′ are turned on, whereby the coil a 3 and the coil a 1 are energized and heated. It is assumed to be 1. In addition, it is also possible to determine a predetermined amount of time so that the amount of electric power obtained by multiplying the above-mentioned predetermined time by the product of the current and the voltage during electric heating, that is, the calorific value becomes uniform in each coil.
  • the switch circuit 31 shown in FIG. 4 is used, and at the same time, the three coils are energized and heated. .
  • one of the coils is strong It is necessary to switch each switch in turn, since the other two coils are each heated by their strength of 1/4.
  • FIG. 4 by turning switch 3 1 a, 3 1 a 'N N, coil a 1 is strongly heated, and coil a 2 and coil a 3 have their strength of 1/4.
  • the coil a 2 is strongly heated by turning on the switches 31 b and 31 b 'after a predetermined time, and the coil a 3 and the coil a 1 are heated with the strength of 1 Z 4. After a predetermined time, coil a 3 is strongly heated by turning on switches 31 c and 31 c ′, and coils a and l and coil a 2 are heated with the strength of 1 c and 4 c.
  • a switch circuit 31 is used.
  • the coils a 1, a 2 and a 3 may not be connected, and there may be a case where six lead wires L are drawn out.
  • the switch circuit 3 1 shown in FIG. It is assumed that each coil is a switch circuit 31 in which one coil is energized and heated.
  • FIG. 1, etc. it is shown that the connection terminal 15 is connected by three lead wires, but in the case of the switch circuit 31 shown in FIG. 5, the terminals 15a to Six of l 5 f will be connected to connection terminal 1 5, and also to stator S will be connected by 6 leads.
  • the switching circuit (switch circuit) of transformer H is the same as that of the motor. That is, for example, as shown in FIG. 13, the transformer H is a coil aa on the primary side formed by Y-connecting three coils a11, a12, and a13, and the iron core g is In between, there is a coil ab on the secondary side in which three coils a 2 1, a 2 2, and a 2 3 are connected by parallel connection.
  • the coil aa on the primary side and the coil ab on the secondary side each correspond to a coil of a motor, and the switch circuit is heated similarly to the motor according to the wire connection method of the coil.
  • 3 1 Is selected.
  • connection terminal 15 should be the secondary side coil ab It is desirable to reheat the secondary side coil ab and then take out both coils.
  • the power supply unit 32 is a three-phase alternating current power supply (R, S, T) as shown in FIG.
  • An isolation transformer 321 connected to the DC / DC converter for buck-boost and leakage prevention, a DC stabilization unit 322 for obtaining stable DC, a PWM control unit 323 for PWM control (pulse width modulation control) for DC and a pulse waveform, It is comprised of an inverter 324 which makes it possible to change the positive / negative and frequency of the pulse waveform, and a detection unit 33 which detects the current and voltage output from the power supply unit 32.
  • the motor is operated at a frequency of 50 to 60 Hz, but such a frequency is not suitable for heating the coil a, and the power supply unit 32 is a frequency changing means (PWM control unit 323, inverter 324, the central processing unit 61) changes the frequency to create a circuit configuration that can perform electrical heating at a higher frequency (for example, 400 Hz).
  • a frequency changing means PWM control unit 323, inverter 324, the central processing unit 61
  • the detection unit 33 detects the resistance value (direct current component) and the inductance of the coil as shown below by the current and voltage preliminarily applied to the coil a, and feeds back to the central processing unit unit 61. Then, the electric heating method is selected based on the detection result by the coil information detection unit 64 incorporated in the controller 6 or the like.
  • the following two control methods are general, one is a constant current method and the other is a constant voltage method.
  • V I ⁇ ⁇ R 2 + (2 ⁇ f L) 2 ⁇ (2)
  • the voltage is measured at 33, and the coil information detection unit 64 back-calculates the equation (1) to detect the resistance value R (DC component) of the coil a. It is possible to Temperature T. Initial resistance value R ⁇ at . Is detected in this way.
  • the resistance value R of the detected coil a and inductance coefficient L are used so that the current value I calculated by equation (1) becomes constant, and in the case of constant voltage control (2)
  • the voltage or current for energizing and heating the coil is determined so that the voltage value V calculated by the equation is constant.
  • whether the method of electric current heating is a constant current method or a constant voltage method depends on the capacity of motor (electric equipment), connection method (Del evening connection, Y connection, etc.), impedance, etc. select.
  • a suitable one is selected depending on the capacity of the motor (electrical equipment), the wiring system, and impedance.
  • the coil temperature detection means 62 is incorporated in the controller 6 and detects the coil temperature T using the constant mass temperature coefficient of the wire of the coil a as described below. First, the temperature T of the wire of coil a. Constant mass temperature coefficient Q! T at . Calculate the following formula.
  • the temperature of the coil a is applied to the coil by applying a preset current I for constant current control and a preset voltage V for constant voltage control.
  • the coil information detection unit 64 calculates a coil resistance value RT that changes with temperature rise.
  • the coil temperature detection means 62 is configured to be able to detect the coil temperature ⁇ without using a thermometer.
  • the temperature sensor 4 is a core temperature detection means for detecting the temperature of the stator core b housed in the processing chamber 1, and is mounted in contact with the stator core b housed in the processing chamber 1.
  • the oxygen concentration sensor 5 detects the oxygen concentration inside the processing chamber 1 to which nitrogen gas N is supplied by the gas supply means 2.
  • the oxygen concentration sensor 5 detects the oxygen concentration inside the processing chamber 1 from the air supply ports 1 1, 1 2, 1 3. It is desirable to be mounted at a remote position.
  • the exhaust processing means 7 is connected to the exhaust port 14 of the processing chamber 1 and discharges air and the like inside the processing chamber 1 and is a flow control valve which also functions as an on-off valve. It comprises an exhaust pump 72 equipped with a filter having a cleaning function.
  • the controller 6 controls the electric heating means 3, the switching circuit (switch circuit) 3 1 and the heating source 26, and mainly comprises the central processing unit 61, the coil temperature detecting means 62 described above, and the input unit 63. Ru. Further, a temperature sensor 4 and an oxygen concentration sensor 5 are connected to the controller 6.
  • the central processing unit 61 is connected to the PWM control unit 323 and the inverter 324 based on the input information (motor capacity, impedance, etc.) from the input unit 63, the input information from the temperature sensor 4 and the oxygen concentration sensor 5, etc.
  • Optimal communication Command the electric heating method.
  • the signals from the detection unit 33, the temperature sensor 4, and the oxygen concentration sensor 5 are fed back to the central processing unit 61.
  • the process of removing the adhesive d of the stator S of the motor will be described with reference to the flow charts of FIG. 6 to FIG.
  • the same process can be applied to cores other than transformers and other motors, so here we will use a motor.
  • the stator frame W including the stator S is accommodated in the processing chamber 1.
  • the lead wire L when the lead wire L is connected to the coil a of the stator S taken out of the motor, the lead wire L can be connected to the connection terminal 15 of the processing chamber 1, so wire connection is made to the coil a There is no need.
  • the lead wire L is not connected to the coil a of the stator S taken out, the lead wire L is newly connected to the terminal block of the stator S and connected to the connection terminal 15 of the processing chamber 1.
  • the inside of the processing chamber 1 is supplied from the gas supply means 2 so as to be filled with nitrogen gas N.
  • the air is discharged by opening the solenoid valve 71 of the exhaust treatment means 7, filling of nitrogen gas N into the inside of the processing chamber 1 becomes smooth.
  • the coil a of the stator S can be preheated by heating the nitrogen gas supplied into the processing chamber 1.
  • the temperature sensor 4 detects the initial temperature of the stator core b (the temperature of the coil a is considered to be the same as the temperature of the stator core b), and the controller 6 reads it. Further, when the detected value of the oxygen concentration sensor 5 is read and the oxygen concentration inside the processing chamber 1 becomes lower than a certain reference value, the detection unit 33 detects the impedance Z of the coil a of the stator S for each winding phase. It detects every. The method of detecting the impedance Z is as described above.
  • the central processing unit 61 is designed to determine the frequency of the constant current method or the constant voltage method corresponding to the detected impedance a of the coil a of the stator S and the initial temperature of the stator core b. Select the pattern of optimum electric current heating, such as whether to use z, and instruct electric current heating to coil a from electric current heating means 3.
  • central processing unit 61 has switch circuit 31 connected to heating means 3. Instructs switching to turn on only one set of switches 3 1 a and 3 1 a ′. Therefore, one coil of coil a is energized and heated, or two or three coils are energized and heated at the same time, or it differs depending on the wiring system, but here it has the 6 terminals of FIG. In the case of coils as an example, the case where one coil is energized and heated will be described.
  • the first coil a 1 is heated by electric conduction.
  • the central processing unit 61 monitors the coil temperature by the coil temperature detecting means 62 and the temperature of the stator core b by the temperature sensor 4 while the first coil a1 is energized by the heating means 3. doing.
  • the coil resistance RT usually increases compared to the initial (before starting the heating) coil resistance RT 0 ((4) See the equation).
  • an excessive current flows in coil a coil a has an abnormality, so the heating in this stage is terminated.
  • the coil temperature is checked, and if the coil temperature does not exceed its upper limit (for example, 400 ° C.), the stator is further Check the temperature of iron core b, and if the temperature of stator iron core b does not exceed the upper limit (for example, 150 ° C), continue to heat the first coil a1.
  • its upper limit for example, 400 ° C.
  • the central processing unit 61 instructs the heating means 3 to stop the power supply to the first coil a 1. Then, check the temperature of the stator core b, and if the temperature of the stator core b is not lower than the lower limit (for example, 80 ° C), stop the current-carrying heating of the first coil. If the temperature falls below the lower limit (for example, 80 ° C.) (descent time), the central processing unit 61 shifts the current heating means 3 to the second coil a 2 and instructs resumption of current heating.
  • the upper limit for example, 400 ° C.
  • the coil temperature does not exceed the upper limit
  • the temperature of the stator core b is at the upper limit (for example, 1 5
  • the central processing unit 61 instructs the heating means 3 to stop the power supply to the first coil a 1. Then, check the temperature of the stator core b, and if the temperature of the stator core b is not lower than the lower limit (for example, 80 ° C), stop the current-carry
  • the central processing unit 61 switches to the electric heating means 3 so that the switch circuit 31 turns on only the next set of switches 31 b and 31 b '. Instruct Therefore, only the coil next to coil a (second coil a 2) is energized and heated. Such control is repeated for the first coil a1 to the third coil a3, and is continued until the set time input from the input unit 63 to the timer circuit of the central processing unit 61 has elapsed. Ru. If the insulation layer of the coil a melts and an overcurrent flows, the energization of the coil a by the energization heating means 3 is stopped, and the energization heating is finished.
  • the coil temperature T raised by the electric heating means 3 is 300 ° C. or higher by feedback control of the value detected by the coil temperature detection means 62 by the controller 6, and the enamel coating of the coil a is
  • the heating is controlled to a temperature that does not cause gasification (usually 400 ° ( ⁇ 550)) or less
  • the heated coil a heats the surrounding binder d and fluidizes the binder d and makes it liquid or liquid.
  • the binder d is surrounded by the inert gas and is in an oxygen-free atmosphere, oxidation of the binder d is prevented and formation of an oxide from the binder d is prevented. .
  • the heating of the coil a is conducted so that the magnetic properties of the stator core b are not deteriorated by the heating of the coil a by the heating means 3 and the temperature of the stator core b is increased too much. Intermittent control is performed. As a specific temperature, the temperature of the stator core b is controlled by feeding back the signal of the temperature sensor 4 so that the temperature is at most 200 ° C. or less, preferably 150 ° C. or less. Therefore, thermal deterioration of the stator core b is prevented. Further, since the energization of the heating means 3 is an alternating current, the heating can be controlled without magnetizing the stator core b.
  • the coil temperature and the temperature of the stator core b are significantly different because a material of low thermal conductivity consisting of the adhesive d of the coil a and the insulating material e is inserted into the stator core b and the coil temperature is This is because it is difficult to transmit to the core b, and the temperature of the stator core b is delayed due to the temperature rising rapidly when heating the coil.
  • the upper limit value of the coil temperature is not suddenly set to the maximum temperature (for example, 400 ° C)
  • the first time is 200
  • the second time is 3 0 It may be done stepwise like 0 ° C.
  • the electromagnetic valve 71 of the exhaust treatment means 7 may be closed, but from the gas supply means 2 to the nitrogen gas N By continuing the supply of nitrogen and the discharge of nitrogen gas N from the exhaust gas treatment means 7, the removal of the sticking agent d can also be promoted.
  • the evaporation component and the like of the fixing agent d are captured by the filter 72 of the exhaust treatment means 7.
  • Stator frame W is housed in processing chamber 1 of coil extraction assist device 100, and fluidizing, liquefying or gasifying binder d by electric heating .
  • the temperature of the fixing agent d is increased by the temperature sensor 4 because the stator S, which has become fluidized, liquefied or gasified, does not have a temperature decrease until it is easily touched by hand even if it is left in the processing chamber 1 even if the energization is stopped.
  • the detected stator temperature falls below a predetermined temperature
  • air is flowed from the compressor 25 b into the processing chamber 1 to accelerate the cooling.
  • the temperature of the stator S decreases until it is touched by hand, it is taken out of the processing chamber 1, and the wire of the coil a is cut off by wire cut at the end face side of the stator core b and pliers etc. It is pulled in the axial direction of the groove c.
  • the coil a from which the fixing agent d has been removed is released from the fixing of the stator core b to the groove, and no carbides of the fixing agent d adhere to the periphery of the coil a. Removal work is easy.
  • the adhesion between the coil a and the groove c of the stator core b is weakened, so the coil a is taken out from the groove c. Becomes easier.
  • the working time for blowing the flame of the gas pana of the prior art example described above to the adhesive d to soften and melt the adhesive d and crushing the adhesive d with fleas etc. is omitted, and the hand involved in taking out the coil a. Work time is reduced.
  • the method for taking out the coil according to the present invention as described above the implementation of the takeout auxiliary device
  • the apparatus was actually manufactured and tested for the form, when the adhesive d is fluidized or liquefied and falls below the stator frame W, it vaporizes and evaporates or diffuses into the nonflammable gas. After cooling the stator frame W, the stator frame W was taken out of the processing chamber 1, and the coil could be easily taken out as shown below.
  • the above-mentioned high-efficiency motor is a motor that is expected to increase production from the demand for energy saving because the space factor that indicates the density at which the coil a is wound is high and coil removal is not easy. Is shown.
  • the coil extraction method according to the present invention and the apparatus thereof according to the present invention described above provide 0.5 hours, 6 to 7 hours, and 1.5 hours, respectively. It took 8 to 9 hours in total. Among them, the time required for manual work was 2 hours. On the other hand, because it took a total of 14 hours in the above-mentioned conventional example, it became possible to achieve an efficiency of 36% to 43% in the whole hours and an efficiency of 86% on the manual time. .
  • the coils are heated by direct current conduction, and intermittent heating is performed while monitoring the coil temperature and the stator core temperature, so the thermal efficiency can be extremely high compared to the conventional method in which the inside of the processing chamber is heated by heating or the like. Power consumption was reduced to 1/5 to 1/8.
  • the embodiment has been described for a motor having a general structure in which the outer peripheral portion is a stator wound with a coil and the central portion is a rotor.
  • a motor in which the outer peripheral portion is a rotor and the central portion is a stator wound with a coil.
  • such a motor is also difficult to pick up the coil by the conventional method, and the present invention can be applied to achieve significant efficiency.
  • the transformer H since the firmly adhering fixing agent d is removed by fluidization, liquidation or gasification, the coil can be easily taken out of the transformer H.
  • the present invention can be applied to an electric device having a core with a coil wound, such as a choke coil for DC smoothing circuit, a reactor for power factor improvement, and an anode reactor for a thyristor valve device, so that coil extraction is easy. Ru.
  • the temperature of the coil a is determined by the calculation method indicated by the coil temperature detection means 62, and the heating by conduction is controlled using both of the core temperature detection means (temperature sensor 4).
  • the detection means 4 it is also possible to substitute an estimated value based on an experiment on the core temperature (with reference to the temperature of the coil).
  • the coil temperature detecting means 62 it is possible to substitute the temperature of the coil a with the predicted value based on the experiment (with reference to the temperature of the core).
  • the amount of heat generation can be obtained from the product of the current and voltage to be heated and the current and voltage, and the current can be heated to equalize the amount of heat generated by the multiple coils.
  • the inert gas is nitrogen gas N.
  • the inert gas is not limited to nitrogen gas N.
  • argon gas can be used.
  • FIG. 16 shows a second example of the best mode for carrying out the invention.
  • the coil extraction assisting device 200 uses steam J instead of the inert gas N used as the noncombustible gas of the first example.
  • Water vapor J is produced by Poira 27. That is, water M is supplied from the outside to the steam tank 2 7 b of the poiler 2 7 and heated in the heat oven 2 7 a to produce the water vapor J. This water vapor condenses below 100 °, so unlike the case of the inert gas, the first supply path 22 shown in FIG. The system is configured to be fed to the processing chamber 1 through the second supply path 2 3 and the third supply path 2 4 equipped with a heat exchanger.
  • the water When heated to 100 ° by the poiler, the water turns into steam J, opens the valve and passes through the second feed path 23 or the third feed path 24 at a pressure of Poira 27 and below 100 ° C. It is heated to the processing chamber 1 so as not to decrease.
  • the solenoid valve 71 is opened for a predetermined time to supply water vapor J, and the inside of the processing chamber is heated to 100 ° C. or higher. At this time, a small amount of water vapor J may condense, but this water can be released through drain pipe 2 8 and drain valve 2 8 a.
  • the processing chamber 1 is filled with water vapor J of 100 ° C. or higher, then the coil a is heated by electric conduction as described in the first example, and the coil a can be easily removed from the core b. .
  • an inexpensive coil extraction assisting device 200 can be configured.
  • FIG. 17 shows a third example of the best mode for carrying out the invention.
  • the coil extraction assisting device 300 of this third example is a combination of the noncombustible gas of the first example with the inert gas N of the first example and the water vapor J of the second example.
  • the inert gas N is sent to the processing chamber 1 through the supply path 23.
  • the water vapor J is supplied to the processing chamber 1 through the supply path 24 and mixed in the processing chamber 1.
  • the solenoid valve 2 3 a of the supply path 2 3 and the solenoid valve 2 4 a of the feed path 2 4 are flow control valves, inert gas N and water vapor J should be mixed gas in any ratio. Can.
  • the condensation of the water vapor J is more difficult than in the case of the water vapor J alone, and even if the water vapor J is condensed, the water condensed by the inert gas N is evaporated again. become.
  • the inert gas N mixed with the gasified components of the fixing agent d may have a strong odor. In such a case, the steam J is mixed at an appropriate ratio. , It becomes possible to reduce the odor. In addition, since the consumption of inert gas N can be reduced, the cost as a gas is also reduced.
  • the power supply unit 32 of the conduction heating means 3 is a single-phase output, but the power supply unit 32 may be a three-phase output.
  • the switching circuit (switch circuit) 31 is not necessary. That is, in the case where the coil a is delta connection or Y connection, the three terminals may be connected directly to the power supply unit.
  • each coil a 1, a 2 and a 3 is not connected, so the lead wire If 6 cables are pulled out, make the Y connection and connect 3 terminals to the power supply.
  • non-combustible gas is also a gas that is harmless to the human body in order to ensure the safety of this device.
  • the coil is electrically heated to make the adhesive flow, liquid or gasified, and the coil is taken out from the core, thereby breaking the adhesive using the conventional governor or tool.
  • the bonding agent is fluidized, liquidated or gasified in an atmosphere of noncombustible gas, the formation of carbides is prevented, no harmful gas is generated, and there is almost no odor (even if there is an exhaust gas or a filter etc. Can be used to improve the working environment for coil removal from the core.
  • the fluidization, liquefaction, or gasification of the adhesive is performed by electric heating of the coil, unnecessary heating of the core is avoided, and deterioration of the magnetic properties of the core can be prevented, and an electric device equipped with the coil Maintain the performance of
  • the coil extraction assisting apparatus of the present invention uses the coil to conduct current and heats the binder, thereby fluidizing, liquidifying, or gasifying the power, and therefore consumes more power than heating the inside of the processing chamber with a heater or the like.
  • the power supply unit that performs electric heating is output as an alternating current, and the frequency of this alternating current can be changed by the frequency changing unit, so that the current flowing to the coil can be suppressed without magnetizing the core. You can make the unit smaller and make the power supply unit cheaper.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Power Engineering (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

L'invention concerne un procédé et un dispositifs destinés au retrait d'une bobine enroulée autour d'un noyau. Ce procédé consiste à placer un noyau (b) sur lequel est enroulée une bobine (a) fixée par un liant (d) dans un atmosphère renfermant un gaz incombustible (N), puis à faire passer de l'électricité dans la bobine (a) afin de chauffer cette dernière et la retirer du noyau (b). Le dispositif comprend une chambre de traitement (1) destinée à contenir un noyau (b) sur lequel est enroulée une bobine (a), un dispositif d'alimentation en gaz (2) destiné à alimenter la chambre de traitement (1) en gaz incombustible (N) et un dispositif de chauffage électroconducteur (3) destiné à faire passer de l'électricité dans la bobine (a) afin de chauffer cette dernière. Ce procédé et ce dispositif auxiliaire permettent de retirer facilement la bobine (a) du noyau (b).
PCT/JP2001/004615 2001-02-13 2001-05-31 Procede et dispositif auxiliaire destines au retrait d'une bobine Ceased WO2002065622A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002564820A JPWO2002065622A1 (ja) 2001-02-13 2001-05-31 コイルの取出方法、取出補助装置

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Application Number Priority Date Filing Date Title
JP2001036037 2001-02-13
JP2001-36037 2001-02-13

Publications (1)

Publication Number Publication Date
WO2002065622A1 true WO2002065622A1 (fr) 2002-08-22

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005086954A (ja) * 2003-09-10 2005-03-31 Aisin Aw Co Ltd 回転電機巻線コイルの加熱処理装置
EP2683064A1 (fr) * 2012-07-03 2014-01-08 Alstom Technology Ltd. Procédé pour éliminer des barres ou des bobines entre des fentes d'une machine électrique
WO2015012725A3 (fr) * 2013-07-23 2015-05-14 Алексей Александрович МАКАРОВ Installation d'extraction d'un enroulement d'une machine électrique ou d'une partie de celui-ci
JP2015136242A (ja) * 2014-01-17 2015-07-27 トヨタ自動車株式会社 ステータ通電加熱装置
JP2022052692A (ja) * 2020-09-23 2022-04-04 トヨタ自動車株式会社 回転電機用ロータの製造方法および製造装置
KR102414175B1 (ko) * 2021-10-22 2022-06-28 주식회사 디알텍 코어 가열 장치

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Publication number Priority date Publication date Assignee Title
JPS5543938A (en) * 1978-09-20 1980-03-28 Toshiba Corp Method of controlling inverter device
JPH02290928A (ja) * 1989-04-27 1990-11-30 Toshiba Corp モールド機器の解体方法
JPH06121495A (ja) * 1992-10-05 1994-04-28 Mitsubishi Electric Corp 電気機器用コイルの取り出し方法
JPH09271197A (ja) * 1996-03-29 1997-10-14 Daikin Ind Ltd 電動機の制御装置
EP0801137A1 (fr) * 1996-04-08 1997-10-15 Matsushita Electric Industrial Co., Ltd. Procédé de récupération du cuivre à partir d'enroulements d'induit en fil de cuivre

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5543938A (en) * 1978-09-20 1980-03-28 Toshiba Corp Method of controlling inverter device
JPH02290928A (ja) * 1989-04-27 1990-11-30 Toshiba Corp モールド機器の解体方法
JPH06121495A (ja) * 1992-10-05 1994-04-28 Mitsubishi Electric Corp 電気機器用コイルの取り出し方法
JPH09271197A (ja) * 1996-03-29 1997-10-14 Daikin Ind Ltd 電動機の制御装置
EP0801137A1 (fr) * 1996-04-08 1997-10-15 Matsushita Electric Industrial Co., Ltd. Procédé de récupération du cuivre à partir d'enroulements d'induit en fil de cuivre

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005086954A (ja) * 2003-09-10 2005-03-31 Aisin Aw Co Ltd 回転電機巻線コイルの加熱処理装置
EP2683064A1 (fr) * 2012-07-03 2014-01-08 Alstom Technology Ltd. Procédé pour éliminer des barres ou des bobines entre des fentes d'une machine électrique
WO2014006029A1 (fr) * 2012-07-03 2014-01-09 Alstom Technology Ltd Procédé pour retirer des barres ou des bobines des fentes d'une machine électrique
EP3076527A1 (fr) * 2012-07-03 2016-10-05 General Electric Technology GmbH Procédé pour éliminer des barres ou des bobines entre des fentes d'une machine électrique
US9871428B2 (en) 2012-07-03 2018-01-16 General Electric Technology Gmbh Method for removing bars or coils from slots of an electric machine
WO2015012725A3 (fr) * 2013-07-23 2015-05-14 Алексей Александрович МАКАРОВ Installation d'extraction d'un enroulement d'une machine électrique ou d'une partie de celui-ci
JP2015136242A (ja) * 2014-01-17 2015-07-27 トヨタ自動車株式会社 ステータ通電加熱装置
JP2022052692A (ja) * 2020-09-23 2022-04-04 トヨタ自動車株式会社 回転電機用ロータの製造方法および製造装置
KR102414175B1 (ko) * 2021-10-22 2022-06-28 주식회사 디알텍 코어 가열 장치

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