[go: up one dir, main page]

WO2009053520A1 - Agencement dans un entraînement à connexion directe à convertisseur de fréquence régulé - Google Patents

Agencement dans un entraînement à connexion directe à convertisseur de fréquence régulé Download PDF

Info

Publication number
WO2009053520A1
WO2009053520A1 PCT/FI2008/000117 FI2008000117W WO2009053520A1 WO 2009053520 A1 WO2009053520 A1 WO 2009053520A1 FI 2008000117 W FI2008000117 W FI 2008000117W WO 2009053520 A1 WO2009053520 A1 WO 2009053520A1
Authority
WO
WIPO (PCT)
Prior art keywords
motor
stator
bridge
actuator
frequency converter
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/FI2008/000117
Other languages
English (en)
Inventor
Jari Pekola
Tapio Haring
Petri MÄKI-ONTTO
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.)
ABB Oy
Original Assignee
ABB Oy
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 ABB Oy filed Critical ABB Oy
Publication of WO2009053520A1 publication Critical patent/WO2009053520A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters
    • H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters with pulse width modulation

Definitions

  • the object of the invention is an arrangement in a frequency converter controlled direct connected drive according to the preamble of Claim 1.
  • Integrated direct connected drives have recently become more common in many applications. Such integrated direct connected drives, a motor frame, shafts or bearings cannot necessarily be distinguished. Instead, the structures of the actuator are utilized.
  • the active electromagnetic parts of the motor operating the actuator are directly connected or integrated to the actuator. Active parts of the motor rotor, such as the permanent magnets or short-circuit winding, are fastened to the actuator shaft.
  • the motor stator parts are fastened to the actuator frame or constitute a part of it.
  • the actuator rotation speed is commonly controlled with a frequency converter.
  • the output voltage of the frequency converter is connected to the motor. Similar solution is also used in the process industry, for example for paper machine roll drives.
  • a motor excited using permanent magnets may, for example, be fitted to a roll drive including a hollow shaft.
  • the bearings of direct connected drives are large in size and have a large diameter, making them expensive as well.
  • electrical insulation also functions as thermal insulation, which constitutes another adverse effect of bearing insulation.
  • the prevention of bearing currents by bearing insulation may cause the bearings to overheat, resulting in premature damaging. Insulation may also increase stray capacitance.
  • high-frequency voltages are induced on motor and actuator parts such as the shaft. Even if the current paths through the bearings are stopped with insulation, the measuring devices fastened to the motor and the actuators, as well as the sensors connected to the devices, may be disturbed by the high-frequency voltages.
  • the effect of high frequency voltages may be controlled by filtering the harmful frequencies from the voltage.
  • LCR filters adjusted for the correct frequency prevent high- frequency components from entering the motor and motor bearings.
  • filters will increase both production and design costs. Particularly harmful is the fact that the filters will slow down control functions and thus deteriorate the control features of the entire drive.
  • the purpose of the present invention is to reduce or prevent bearing currents in frequency converter controlled direct connected drives, hi order to achieve this, the invention is characterized by the features specified in the characteristics section of Claim 1.
  • the characteristics of some other preferred embodiments of the invention are characterized by dependent claims.
  • the present invention is based on the innovative idea of preventing bearing currents in direct connected drives by preventing the creation of bearing currents and the passage of said currents in the stator of the motor.
  • the stator windings of the motor and the frequency converter supplying the windings have been connected so that the high frequency currents travel in the windings in opposite phases, compensating each other.
  • the structure of the semiconductor switches of modern frequency converters is such that no new switch components are needed to apply the invention in practice. Physical switch components are simply electrically constructed so that an existing redundant feature is activated. The manufacturing costs of the invention are therefore low. Only the switch control is reorganized according to the invention. On the other hand, particularly in larger electrical machines, the existing stator windings are manufactured to consist of parallel windings. The parallel windings of the electrical machine shall then be merely connected in a new way, which keeps the costs low also for this case. As only minor changes will be required to carry out the solution according to the invention on frequency converter control on the one hand and on the connection of an electrical machine's stator windings on the other, the application of the invention is also well justified and relatively cheap for targets already in active use.
  • earth fault protection grounding usually provides adequate grounding when applying the invention. Grounding can also be carried out using cables without high frequency properties.
  • a dual-bridge inverter can be utilized to prevent common-mode voltages from accessing the electrical machine or an actuator driven by the machine. Delivery limits for the suppliers of various parts are thus clearly defined.
  • FIG. 1 is a schematic illustration of a coupling to enable a frequency converter to supply and control an electrical machine, implementing a solution according to the invention.
  • the frequency converter includes a network rectifier 4 connected to an alternating-current network 2 and used to create a direct-current voltage into the frequency converter's intermediate circuit 6.
  • a capacitor 8 has been connected to the intermediate circuit between the intermediate circuit conductors 10 and 12 using a known method, hi this embodiment of the invention, direct current is conducted from the intermediate circuit to the inverter component 15, consisting of two identical inverters 14 and 16 that contain a six-pulse bridge, and using IGBT semiconductor switches.
  • Pulse width modulation is used to convert direct voltage into alternating voltage by connecting the positive and negative voltages of the direct voltage to the stator windings of the electrical machine so that an alternating voltage according to the control is created in the windings.
  • Alternating voltage consists of voltage pulses.
  • the motor stator winding consists of two separate branch windings, in which case the first branch winding 18 consists of windings U 1 , V 1 and W 1 and the second branch winding 20 consists of windings U 2 , V 2 , and W 2 .
  • Branch windings 18 and 20 are parallel connected so that their conductors do not touch at any point.
  • the first branch winding 18 is supplied by the inverter 14, and the other branch winding 20 is supplied by the inverter 16.
  • the first and second branch winding are identical, but they are supplied from opposite ends. This is illustrated by the schematic winding diagram in Figure 1.
  • the first ends 22, 24 and correspondingly 26 (marked with black dots) of the windings Ul, Vl and Wl of the first branch winding 18 have been connected to the output of the inverter 14, and the opposing ends have been connected to the star point 27.
  • the first ends (marked with black dots) of the windings of the second branch winding 20 have been connected to the star point 28, and the opposing ends have been connected to the output of the inverter 16.
  • Inverters 14 and 16 are controlled by the control device 30.
  • the control signals generated by the device are conducted by cable 32 to the semiconductor switches of inverter 14.
  • the same control signals are conducted by cable 34 to the reverse operator 36 and further with cable 38 to the semiconductor switches of inverter 16.
  • the voltages supplied by inverters 14 and 16 to branch windings 18 and 20 are therefore of the same magnitude but opposite phase, resulting in the branch windings inducing a unidirectional field.
  • Both inverters 14 and 16 generate common-mode voltages that are due to the sum of voltages over windings not equaling to zero at all times.
  • the switches of inverters 14 and 16 are simultaneously controlled in the opposite phases, both create common-mode voltages of identical magnitude, canceling each other out.
  • the described inverter control method deviates from the master-slave drives representing known technology in that one control unit is used to control inverters in the arrangement according to the invention, the said control unit producing the control signals for both branches, hi master-slave drives, the master and slave units produce their own control signals on the basis of a higher level current, frequency or, for example, moment instruction.
  • FIG. 2 illustrates an application according to the invention, with a dual-bridge inverter used to control a roll drive 40, the shaft 42 of which is supported to the base 44 with bearings 46 on both ends.
  • the induction motor rotor 48 turning the roll has been fitted around the end of shaft 42, the said end extending beyond the roll and the bearing 46 supporting the shaft of the roll.
  • the motor stator 50 around the rotor 48 at the distance of the air gap 51 from the stator 50 has been fastened to the base 44.
  • the bearings 46 supporting the roll and the motor rotor 48 are thus outside the stator 50 in axial direction.
  • FIG 3 illustrates another application according to the invention in which a dual-bridge inverter supplies a permanently excited synchronous motor 52 turning a drum 54, both ends of the drum having bearings 56 at the outer circumference.
  • the synchronous motor stator 58 has been fastened to the base 60.
  • the drum bearings 56 are also supported against the base.
  • the synchronous motor rotor 62 has been fitted inside the stator 58.
  • the rotor is fastened to the drum.
  • Bearings 56 supporting the rotor 62 are outside the stator 58 in the axial direction.
  • the motor controlled by a frequency converter may also be another alternating-current motor such as a synchronous reluctance motor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Ac Motors In General (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Control Of Stepping Motors (AREA)

Abstract

L'invention concerne un agencement dans un entraînement à connexion directe dans lequel la vitesse de rotation d'un moteur relié à un actionneur est commandée au moyen d'un convertisseur de fréquence modulé haute fréquence (4, 14, 16) fournissant une tension de fréquence alternée au stator de moteur. Dans cet agencement, le stator de moteur est fixé au châssis de l'actionneur et le rotor de moteur au composant rotatif de l'actionneur, monté sur palier sur le châssis. L'enroulement du stator de moteur (18, 20) consiste en un enroulement à deux branches, et le convertisseur de fréquence un inverseur en pont double constitué de deux ponts sensiblement identiques (14, 16). Le premier pont (14) alimente le premier enroulement de branche (18) du stator, et le second pont (16) alimente le second enroulement (20) du stator. Le premier pont (14) est commandé par les premières impulsions de commande (32) et le second pont est commandé avec les secondes impulsions de commande (38), qui sont simultanées avec les premières impulsions de commande et inverses de celles-ci.
PCT/FI2008/000117 2007-10-26 2008-10-24 Agencement dans un entraînement à connexion directe à convertisseur de fréquence régulé Ceased WO2009053520A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20070813 2007-10-26
FI20070813A FI20070813A7 (fi) 2007-10-26 2007-10-26 Järjestely taajuusmuuttajaohjatussa suoravetokäytössä

Publications (1)

Publication Number Publication Date
WO2009053520A1 true WO2009053520A1 (fr) 2009-04-30

Family

ID=38656822

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2008/000117 Ceased WO2009053520A1 (fr) 2007-10-26 2008-10-24 Agencement dans un entraînement à connexion directe à convertisseur de fréquence régulé

Country Status (2)

Country Link
FI (1) FI20070813A7 (fr)
WO (1) WO2009053520A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012119670A1 (fr) * 2011-03-04 2012-09-13 C. & E. Fein Gmbh Entraînement électrique
WO2012119795A3 (fr) * 2011-03-04 2013-07-04 C. & E. Fein Gmbh Unité de commande
CN103546087A (zh) * 2013-09-30 2014-01-29 刘建平 一种异步电机的非变频电容调速及绕组联接电路
CN103944333A (zh) * 2014-04-29 2014-07-23 国家电网公司 一种脉冲调速型绕线转子异步电机
WO2014016305A3 (fr) * 2012-07-23 2014-10-23 Emec-Prototyping Ug Machine électrique
CN108897720A (zh) * 2018-06-29 2018-11-27 中国重型机械研究院股份公司 一种整流单元降功率的选型方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004036721A1 (fr) * 2002-10-21 2004-04-29 Abb Oy Installation permettant de proteger une machine electrique

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004036721A1 (fr) * 2002-10-21 2004-04-29 Abb Oy Installation permettant de proteger une machine electrique

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"Industry Applications Conference, 1999, Oct.", article VON JOUANNE, A ET AL.: "A reduced switch dual-bridge inverter topology for the mitigation of bearing currents, EMI and DC-link voltage variations", pages: 1945 - 1949, XP010355130 *
MAKI-ONTTO, P ET AL.: "Reduction of capacitive and induced shaft voltages in an induction motor drive using dual-bridge inverter approach", 'ELECTRICAL ENGINEERING' (2006) 88, ARCHIV FUR ELEKTROTECHNIK, August 2006 (2006-08-01), pages 465 - 472, XP019419650 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012119670A1 (fr) * 2011-03-04 2012-09-13 C. & E. Fein Gmbh Entraînement électrique
WO2012119795A3 (fr) * 2011-03-04 2013-07-04 C. & E. Fein Gmbh Unité de commande
CN103503308A (zh) * 2011-03-04 2014-01-08 C.&E.泛音有限公司 电驱动装置
CN103534930A (zh) * 2011-03-04 2014-01-22 C.&E.泛音有限公司 控制单元
WO2014016305A3 (fr) * 2012-07-23 2014-10-23 Emec-Prototyping Ug Machine électrique
CN103546087A (zh) * 2013-09-30 2014-01-29 刘建平 一种异步电机的非变频电容调速及绕组联接电路
CN103944333A (zh) * 2014-04-29 2014-07-23 国家电网公司 一种脉冲调速型绕线转子异步电机
CN108897720A (zh) * 2018-06-29 2018-11-27 中国重型机械研究院股份公司 一种整流单元降功率的选型方法

Also Published As

Publication number Publication date
FI20070813L (fi) 2009-04-27
FI20070813A7 (fi) 2009-04-27
FI20070813A0 (fi) 2007-10-26

Similar Documents

Publication Publication Date Title
CN111133658B (zh) 电机系统及控制方法
Honsinger Steady-state performance of reluctance machines
WO2009053520A1 (fr) Agencement dans un entraînement à connexion directe à convertisseur de fréquence régulé
JP5892628B2 (ja) ベアリングレスモータ
US20150364978A1 (en) Electric Machine
JP6194113B2 (ja) モータ駆動装置
CN109643968B (zh) 旋转电机控制装置及电动助力转向控制装置
KR20150096900A (ko) 단일 인버터를 이용한 복수의 영구 자석 동기식 모터의 구동 장치 및 방법
JP2014117140A (ja) 並列コイル型永久磁石モータの故障検出方法及びシステム
JP2009527211A (ja) 軸受電流を防止する装置を有する電気機械および方法
WO2019063400A1 (fr) Dispositif d'entraînement électrique
WO2014207858A1 (fr) Machine rotative et système d'entraînement de machine rotative
JP2016510971A (ja) 電動機
CA2772805C (fr) Circuit transmetteur de position pour moteurs sans balais
JP5301905B2 (ja) 複数相回転電機駆動装置、複数相発電機用コンバータ、複数相回転電機、及び回転電機駆動システム
US7583046B2 (en) Rotor position detection at standstill and low speeds using a low power permanent magnet machine
EP3465905B1 (fr) Machine électrique sans balais
JP6626973B2 (ja) ６線３相モータおよびモータシステム
Hosobata et al. Modeling and analysis of a linear resonant electrostatic induction motor considering capacitance imbalance
Hua et al. Sensorless control for a PM machine with reduced current distortion using space vector PWM excitation
Kumar et al. Simplified fault detection algorithm for voltage source fed induction motor
CN220307094U (zh) 转子串电容式异步直线电机及转子串电容式异步旋转电机
Tootoonchian et al. A new technique for analysis of static eccentricity in axial flux resolver
Poudel et al. Line start synchronous motor for multi-speed applications
Udema et al. Rotary transformer for contactless excitation of synchronous machines fed through neutral conductor

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08841341

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 08841341

Country of ref document: EP

Kind code of ref document: A1