CN101499692A - Rotary motor and power generation system - Google Patents

Abstract

A rotating electrical machine comprising: a stator having an armature winding wound around an iron core; a rotor rotatably disposed concentrically on the inner diameter side of the stator; and a cooling ventilation mechanism capable of adjusting air volume, and further comprising: measuring ambient temperature mechanism; and a mechanism that detects any one or more of armature voltage, armature current, and field current, and calculates the rotating electrical machine based on the measured value of the ambient temperature, the detected value of the detection mechanism, and the cooling air volume command value. The new cooling air volume command value is determined based on the calculated temperature value in the rotary electric machine. Accordingly, it is possible to provide a rotating electric machine capable of operating at high efficiency by controlling the cooling air volume sufficiently while keeping the maximum temperature of the rotating electric machine within a limit value while maintaining soundness.

Description

Rotating electrical machines and power generation systems

technical field

The invention relates to a rotating electrical machine with an internal cooling ventilation mechanism.

Background technique

As an example of a conventional rotating electric machine having an internal cooling ventilation mechanism, JP-A-10-42522 describes a rotating electric machine that is cooled by introducing cooling air into the machine from a cooling fan attached to the rotor. Among them, the size of the cooling fan is determined so that the temperature inside the machine does not exceed the limit value in order to circulate the preset cooling air flow rate.

On the other hand, Japanese Unexamined Patent Publication No. 2003-284289 discloses an example of a rotating electric machine that is forced to blow air by a blower and has a control device that controls the cooling air volume based on the blower inlet temperature and load current. The cooling air volume control device disclosed therein controls ventilation according to the temperature of the inlet or outlet of the air supply to the rotating electrical machine, and the relationship between the air supply temperature and the necessary air volume that is actually measured by the actual machine or based on the actual machine mode, so that the temperature Do not exceed the specified value.

However, in a turbine generator with a long axial length and a plurality of ventilation sections in the axial direction, the temperature inside the machine may vary greatly depending on the axial position. For example, in the generator coil described in Japanese Unexamined Patent Publication No. 2005-210893, the analysis result of the coil temperature is shown, and it can be seen that there is a difference of approximately 80K between the highest temperature and the lowest temperature.

[Patent Document 1] Japanese Patent Laid-Open No. 10-42522

[Patent Document 2] JP-A-2003-284289 Gazette

[Patent Document 3] JP-A-2005-210893

In the internal cooling realized by the cooling fan used in the existing turbine generator, etc., the predetermined cooling air flow is always flowed so that the internal temperature does not exceed the limit value. When the ambient temperature is low or the load If the internal temperature is low due to low ratio, etc., excessive cooling air will flow, resulting in unnecessary loss. Here, the ambient temperature refers to the temperature other than the air supply inlet or outlet outside the generator.

On the other hand, the conventional cooling air volume control device controls the cooling air volume based on the temperature of the air inlet or outlet to the rotary electric machine. However, in the case of a large rotating electrical machine with a long axial length and multiple ventilation sections in the axial direction, the temperature inside the machine may vary greatly depending on the axial position, and the air volume determined by the temperature of the air inlet or outlet may not be sufficient. It must be able to ensure that the maximum temperature inside the machine does not exceed the specified value. A portion whose temperature greatly exceeds a predetermined value may cause deterioration of coil insulation, non-uniform thermal extension of the coil, and the like, possibly causing damage to the coil or the core. In addition, if the cooling air volume is set with a margin in consideration of the temperature distribution, especially when the temperature range is large, the margin will also increase, and a large amount of unnecessary loss will be generated.

In addition, in large rotating electric machines, etc., since the specifications of each machine are different, it may not be possible to obtain sufficient actual measurement data of the temperature and air volume inside the machine for the actual machine or the actual machine model.

Contents of the invention

The present invention was conceived to solve the above-mentioned problems, and its object is to provide a rotating electrical machine capable of operating at high efficiency by sufficiently controlling the cooling air volume while keeping the maximum temperature of the rotating electrical machine within a limit value while maintaining soundness. motor.

One feature of the present invention is to provide a rotating electrode comprising: a stator wound with an armature winding on an iron core; a rotor wound with an excitation winding; a cooling ventilation mechanism with variable air volume; an armature voltage and an armature current. detection mechanism; and an ambient temperature detection mechanism, which controls the cooling air volume based on the detected armature voltage, armature current, temperature, and the relationship between the maximum temperature in the machine and the necessary cooling air volume calculated through analysis so that the The maximum temperature inside the machine does not exceed the preset limit value.

In the above-mentioned feature, the armature voltage may not be detected but may be set to a predetermined value.

In the foregoing feature, the rotor is wound with the field winding, and the physical quantity to be detected is used instead of the armature voltage and the armature current or both as the field current.

In the previous feature, there is also a mechanism for calculating the maximum temperature inside the machine, the temperature distribution inside the machine, and the required air volume based on the detected armature voltage, armature current, and ambient temperature.

In the previous feature, the relationship between any one or more of the armature voltage, armature current, field current, and ambient temperature, the maximum temperature in the machine, and the necessary cooling air volume is tabulated by analysis, and the cooling air volume is controlled by referring to the table. .

In the previous feature, a cooling fan is provided on the rotor to share the cooling ventilation mechanism with variable air volume and the cooling air volume.

In addition, other features of the present invention include: a stator with an armature winding wound on an iron core; a rotor wound with an excitation winding; a cooling ventilation mechanism with a variable air volume; multiple temperature detection mechanisms installed inside the machine; Calculate the maximum temperature in the machine according to the detected temperature and the temperature of the temperature detection mechanism, and control the cooling air volume based on the relationship between the maximum temperature in the machine and the necessary cooling air volume, so that the maximum temperature in the machine does not exceed the preset limit value.

In the previous feature, there is also a mechanism for calculating the maximum temperature in the machine or the temperature distribution in the machine and the required air volume based on the detected temperature in the machine and the position of the temperature detection mechanism.

In the previous feature, it is possible to have a storage device that stores the load state or ambient temperature, the maximum temperature inside the machine, and the required cooling air volume in advance in a plurality of modes, and read these modes at a determined time to control the cooling air volume.

In the previous feature, a cooling fan is provided on the rotor to share the cooling ventilation mechanism with variable air volume and the cooling air volume.

Still another feature of the present invention is to provide a rotating electrical machine including: a stator having an armature winding wound around a stator core; a rotor having a field winding wound thereon; a stator frame for accommodating the stator and the rotor; A ventilation section in which a shelf provided between the stator core and the stator frame is divided in the axial direction; a plurality of cooling ventilation mechanisms corresponding to the ventilation section; a voltage and current detection mechanism of an armature; and an ambient temperature The detection mechanism increases the air volume of the cooling ventilation mechanism of a certain ventilation part at the highest temperature point based on the relationship between the maximum temperature inside the machine and the necessary cooling air volume calculated based on the detected armature voltage and current, and the ambient temperature through analysis. so that the maximum temperature inside the machine does not exceed the preset limit value.

In the previous feature, a cooling fan is provided on the rotor to share the cooling ventilation mechanism with variable air volume and the cooling air volume.

Another feature of the present invention is to provide a power generation system comprising: a stator with an armature winding wound on an iron core; a rotor wound with an excitation winding; a cooling ventilation mechanism with a variable air volume; and an abnormality detection of the cooling ventilation mechanism. means; a communication means that communicates with a command room that operates the rotating electric machine; and notifies the command room of the abnormality when the abnormality detection means detects an abnormality.

In the previous feature, when an abnormality is detected by the abnormality detection means, it is possible to notify the command room of the prime mover (prime mover) of the abnormality.

Another feature of the present invention is to provide a power generation system, which is based on a generator that is equipped with a variable air volume cooling ventilation mechanism, an armature current detection mechanism, and an ambient temperature measurement mechanism, and operates by commanding an armature voltage. According to the command value of the armature voltage, the detected armature current, the ambient temperature and the relationship between the maximum temperature inside the machine and the necessary cooling air volume calculated through analysis, the cooling air volume is controlled so that the maximum temperature inside the machine does not exceed the preset value limit value.

In addition, in these configurations, the temperature test results of no-load operation obtained by the equivalent temperature test method, the temperature test results of short-circuiting the armature terminals and passing the armature current, and the mechanical loss temperature test results can be used for the highest Calculation of temperature or temperature distribution.

Also, in these configurations, an electric blower driven by a variable-speed motor or an axial-flow fan equipped with angle-variable blades can be used as the ventilation mechanism with variable air volume.

The present invention can provide a rotating electric machine capable of operating at high efficiency by controlling the maximum temperature of the rotating electric machine within a limit value, maintaining soundness, and sufficiently controlling the cooling air volume necessary.

Description of drawings

Fig. 1 is a configuration diagram showing Embodiment 1 of the present invention.

FIG. 2 is an explanatory diagram showing the air volume calculation process.

Fig. 3 is a configuration diagram showing Embodiment 2 of the present invention.

Fig. 4 is a configuration diagram showing Embodiment 3 of the present invention.

Fig. 5 is a configuration diagram showing Embodiment 4 of the present invention.

FIG. 6 is an explanatory diagram showing the air volume calculation procedure in Embodiment 4 of the present invention.

Fig. 7 is a configuration diagram showing Embodiment 5 of the present invention.

FIG. 8 is an explanatory diagram showing an air volume calculation procedure according to Embodiment 5 of the present invention.

Fig. 9 is a cross-sectional view showing a rotating electrical machine according to Embodiment 6 of the present invention and an armature winding temperature.

Fig. 10 is a diagram showing the relationship between the output of the rotating electrical machine and the required air volume.

FIG. 11 is a graph showing the relationship between the ambient temperature of the rotating electrical machine and the required air volume.

Fig. 12 is a graph showing the relationship between air volume and fan power.

FIG. 13 is a diagram showing an example of a table of required air volumes output by the rotating electric machine and ambient temperature.

Fig. 14 is a graph showing the relationship between the air volume and the pressure characteristics according to the number of rotations in a variable-speed blower.

Fig. 15 is a configuration diagram showing Embodiment 7 of the present invention.

Fig. 16 is a graph showing the relationship between the air volume-pressure characteristics according to the blade angle in the variable-angle fan.

17 is a diagram showing an example of detected temperature values and calculated temperature values of armature windings in Embodiment 4 of the present invention.

Fig. 18 is a configuration diagram showing Embodiment 8 of the present invention.

In the figure: 1—rotating motor, 2—cooling and ventilation mechanism, 3—armature voltage detection mechanism, 4—armature current detection mechanism, 5—ambient temperature detection mechanism, 6—air volume control mechanism, 7—necessary air volume calculation mechanism, 8—excitation current detection mechanism, 9—internal temperature detection mechanism, 10—temperature sensor, 11—cooling fan, 12—rotor, 13a～13g—ventilation part, 14a～14g—cooling and ventilation mechanism corresponding to the ventilation part, 15 —Stator core, 16—Stator frame, 17—Shelf, 22—Input data, 23—Axial flow fan with variable angle wings, 24a～24g—Temperature value of each detection position, 25—Temperature calculation value, 26— Difference between temperature detection value and temperature calculation value, 27—turbine, 28—power system, 29—abnormality detection mechanism, 30—command room.

Detailed ways

Next, the best mode for carrying out the present invention will be described based on examples. In the following embodiments, a winding excitation type generator in which a field winding is wound around a rotor is exemplified as a rotating electric machine, but a generator or a motor using permanent magnets as an excitation source may also be used. Alternatively, an induction generator or an induction motor with a secondary conductor is also possible.

【Example 1】

FIG. 1 is a configuration diagram showing Embodiment 1 of the present invention. The rotating electrical machine 1 ventilates and cools the inside of the machine through a cooling ventilation mechanism 2 with variable air volume. The calculation mechanism 7 calculates the maximum temperature in the computer according to the detection values of the armature voltage detection mechanism 3, the armature current detection mechanism 4 and the ambient temperature detection mechanism 5, and then calculates the maximum temperature used to make the maximum temperature in the machine not exceed the predetermined limit value. the necessary air volume. The air volume control means 6 adjusts the air volume of the cooling ventilation means 2 so that the air volume is determined by the required air volume calculation means 7 . The configuration of this embodiment is effective when the temperature of the armature is predicted to be higher than that of the rotor.

Fig. 2 assumes a method of calculating the temperature of each part by using the ventilation and heat transfer paths as a network according to the method in the literature, and shows the calculation process of the maximum temperature and the required air volume. The process of achieving the necessary air volume is roughly divided into two. One is the ventilation calculation process, which calculates the ventilation resistance from various elements of the rotating electrical machine, and then calculates the coolant flow rate q circulating in each part from the air volume of the cooling ventilation mechanism.

On the other hand, in the process of calculating the temperature, firstly, the loss generated in the machine of the rotating electric machine is calculated based on the various factors 100 of the rotating electric machine, the armature voltage V, the armature current Ia, and the field current If as the input data 22, That is, calorific value.

The loss of the armature, that is, the calorific value Qs, can be expressed by the sum of the calorific value Qc of the armature winding and the calorific value Qi of the iron core, and Qc and Qi depend on V and Ia.

Q _S =Q _c (V, I _a )+Q _i (V, I _a )

In addition, the calorific value Q _R of the rotor is represented by the sum of the calorific value Qm generated by mechanical loss such as friction and the calorific value Qf of the field winding, and Q _f depends on _If . Here, when determining the size and rotational speed of the rotating electrical machine, Qm is constant regardless of voltage and current.

Q _R ＝Q _m +Q _f (I _f )

The above-mentioned calorific value is distributed to the heat generating part element as a heat source.

Next, based on this calorific value and the air volume of each part calculated in the previous ventilation calculation, the heat transfer amount transferred to each part is calculated.

The temperature difference between two points in the network (θ ₁ -θ ₂ ) is represented by the heat transfer Q _e and the thermal resistance _RT of each part.

θ ₁ —θ ₂ = R _T Q _e

When the position to be calculated is a heat conduction element, the thermal resistance _RT is proportional to the heat conduction distance δ, and is inversely proportional to the heat conduction rate λ and the heat transfer area A.

【Mathematical formula 1】

${\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; T</span>}}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; \&delta;</span>}}{\mathrm{<span\; class="notranslate">\; \&lambda;A</span>}}$

On the other hand, when the calculation object is a heat transfer element, it is inversely proportional to the heat transfer rate α and the heat transfer area A.

【Mathematical formula 2】

${\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; T</span>}}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; \&alpha;A</span>}}$

In the temperature calculation, the temperature of the solid as the heat generating part is obtained first, and then the temperature of the fluid as the coolant is obtained. The temperature rise ΔT of the fluid relative to the heat input from the heat transfer element is proportional to the heat input ΔQ to the fluid element, and inversely proportional to the coolant flow rate q and the constant pressure specific heat Cp of the coolant. Here, as the flow rate q, data obtained by ventilation calculation prior to temperature calculation is used.

【Mathematical formula 3】

$\mathrm{<span\; class="notranslate">\; \&Delta;T</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; \&Delta;Q</span>}}{\mathrm{<span\; class="notranslate">\; q</span>}{\mathrm{<span\; class="notranslate">\; C</span>}}_{\mathrm{<span\; class="notranslate">\; p</span>}}}$

Comparing the calculation results of the temperature rise in each part with the previous step, if the difference is less than a certain value, it is regarded as convergence, and the calculation results of the temperature rise are added to the initial temperature Ta (environmental temperature) in each part, and sent to the maximum temperature determination 21.

In the configuration of this embodiment, detected values are used for the armature voltage and armature current, and predetermined values are used for the exciting current. If the above-mentioned process is repeated by increasing the air volume until the maximum temperature in the machine obtained by calculation becomes below the limit value, the necessary air volume to meet the temperature limit value can be calculated.

FIG. 10 shows an example of the relationship between the output of the rotating electrical machine and the required air volume for a certain rotating electrical machine. At this time, when cooling the inside of the rotating electrical machine by using a blower fan with variable air volume as the cooling ventilation mechanism, the relationship between the air volume required for cooling and the shaft power is shown in FIG. 12 . In FIGS. 10 and 12 , the required air volume and shaft power are displayed as percentages of 100% when the output of the rotary electric machine is 100%. For example, the air volume required for the rotating electrical machine to operate at 50% output is about 50% in FIG. In the present invention, since the air volume of the blower fan as the cooling mechanism is variable and controlled to the necessary air volume based on the highest temperature, unnecessary loss is reduced and high-efficiency operation can be realized. In this example, approximately 80% of the shaft power can be cut.

In addition, FIG. 11 shows still another example of the relationship between the ambient temperature of the rotating electrical machine and the required air volume. At this time, when cooling the inside of the rotating electrical machine by using a blower fan with variable air volume as the cooling ventilation mechanism, the relationship between the air volume required for cooling and the shaft power is shown in FIG. 12 . In Fig. 11 and Fig. 12, the required air volume and shaft power are displayed as percentages of 100% when the ambient temperature of the rotating electric machine is 25°C. For example, relative to the ambient temperature of 25°C, the air volume required when the rotating electrical machine operates at 0°C is about 70% in FIG. 11 , and the required shaft power at this time is about 40% in FIG. 12 . In the present invention, since the air volume of the blower fan as the cooling mechanism is variable and controlled to the necessary air volume based on the highest temperature, unnecessary loss is reduced and high-efficiency operation can be realized. In this example, approximately 60% of the shaft power can be cut.

In addition, if the relationship between the output of these rotating electrical machines and the required air volume, and the relationship between the ambient temperature and the required air volume is set in advance in the table shown in FIG. . In addition, it is also conceivable to tabulate the necessary air volume at every predicted time.

The above-mentioned output, required air volume relative to the ambient temperature, and shaft power are examples related to rotating electrical machines, and their values vary depending on the equipment.

In addition, in the above configuration, it is set to use a blower driven by a variable-speed motor as the cooling ventilation mechanism whose air volume is variable. That is, the air volume control means controls the rotational speed of the motor according to the required air volume. FIG. 14 shows an example of air volume-pressure characteristics of the blower with respect to the rotational speed of the motor. By controlling the number of revolutions by a variable speed motor, the air volume can be controlled without requiring mechanical elements such as a baffle.

In the structure of the present invention, according to the detected armature voltage, armature current, and the calculation value of the maximum temperature in the machine calculated from the ambient temperature, the necessary air volume of the cooling ventilation mechanism 2 is determined and controlled so that the maximum air volume in the machine can be controlled. Since the temperature does not exceed the limit value, unnecessary loss can be reduced, and the rotary electric machine can be operated with high efficiency. By determining the required air volume based on the maximum temperature inside the machine, even in a rotary electric machine with a long shaft length, it is not necessary to observe the temperature margin, and an appropriate air volume control can be realized.

Furthermore, since the maximum temperature is calculated from the armature voltage, the armature current, and the ambient temperature, it is possible to realize the operation at the optimum efficiency following the fluctuation of the voltage or the change of the ambient temperature.

[Example 2]

FIG. 3 is a configuration diagram showing Embodiment 2 of the present invention. When it is known in advance that there is little variation in the armature voltage, or when the command value of the armature voltage can be used, only the armature current is detected, and the maximum temperature is calculated using the predetermined value or the command value of the armature voltage. That is, the maximum temperature and the required air volume are calculated using the predetermined or commanded armature voltage, the detected armature current, and the ambient temperature as input data 22 in the calculation process of FIG. 2 .

According to the present embodiment, the armature voltage detection mechanism can be omitted, and a simple configuration can be realized.

[Example 3]

FIG. 4 is a configuration diagram showing Embodiment 3 of the present invention. An excitation current detection unit 8 for detecting the excitation current of the rotary electric machine 1 and an ambient temperature calculation unit 5 are provided. The calculation unit 7 calculates the maximum temperature inside the machine based on the values detected by the excitation current detection unit 8 and the ambient temperature detection unit 5. Next, Calculate the air volume necessary to keep the maximum temperature inside the machine from exceeding a predetermined limit value. The air volume control means 6 adjusts the air volume of the cooling ventilation means 2 so that the air volume is determined by the required air volume calculation means 7 . That is, the maximum temperature and the required air volume are calculated using the predetermined armature voltage and armature current, the detected field current, and the ambient temperature as input data 22 in the calculation process of FIG. 2 .

The configuration of this embodiment is effective when the temperature of the field winding is predicted to be higher than that of the armature winding. Loss reduction can be achieved by controlling the air volume so that the temperature of the field winding does not exceed the limit value.

In this embodiment, the maximum temperature inside the machine is calculated by detecting the field current and the ambient temperature. However, if it is difficult to predict which of the field winding and the armature winding is high temperature, it can also be combined as described in Embodiment 1. As shown, the armature voltage and armature current are detected to calculate the maximum temperature inside the machine.

【Example 4】

FIG. 5 is a configuration diagram showing Embodiment 4 of the present invention. A plurality of temperature sensors 10 are provided in the rotating electrical machine 1 , and a temperature is detected by a temperature detection mechanism 9 . The calculation unit 7 calculates the maximum temperature in the computer based on the position of the temperature sensor 10 and the detected temperature, and then calculates the necessary air volume for keeping the maximum temperature in the machine from exceeding a predetermined limit value. The air volume control means 6 adjusts the air volume of the cooling ventilation means 2 so that the air volume is determined by the calculation means 7 .

FIG. 6 shows the calculation process of the maximum temperature. Using the specified armature voltage, armature current, and excitation current as input data 22, ventilation calculation and loss calculation are performed in the same manner as in Embodiment 1, and the temperature distribution of the armature winding is obtained as shown in Figure 17, and the detected temperature and calculation temperature for comparison. The predetermined armature voltage, armature current, and field current used for calculation are, for example, design values, command values, and the like. In FIG. 6 , the smallest temperature among the detected temperatures is used as the initial value for temperature calculation, but a predetermined value such as a design value may be used as the initial value. In addition, in the configuration capable of measuring the ambient temperature, the ambient temperature may be used as the initial value.

Here, as shown in FIG. 17 , there may be a difference between the temperature detection values 24 a to 24 g and the temperature calculation value 25 . At this time, when a temperature higher than the temperature calculation value is detected, the required air volume is determined based on the temperature obtained by adding the temperature difference at the point where the difference 26 between the temperature detection value and the temperature calculation value is the largest to the entire temperature calculation value. On the contrary, when the temperature calculation value is larger than all the temperature detection values, the difference at the position of the lowest temperature detection value is subtracted from the calculation value to perform correction.

Since the maximum temperature is calculated based on the detected temperatures at multiple points, it is possible to estimate the temperature inside the machine with high precision, which is effective in ensuring soundness and reducing unnecessary air volume.

When a plurality of temperature detection mechanisms can be provided inside and outside the rotating electrical machine, high-precision Estimated internal temperature.

In addition, if the temperature test results of no-load operation, the temperature test results of short-circuiting the armature terminals and passing the armature current, and the mechanical loss temperature test results are used every time the maximum temperature is calculated, the When sufficient temperature data cannot be obtained due to an abnormality, temperature estimation can be realized by adding measurement points.

In addition, if the present embodiment is configured to send a notification to the command room by a communication mechanism not shown when the detected temperature exceeds a certain value, it is possible to detect an abnormality and prevent damage to the rotating electrical machine before it happens.

【Example 5】

FIG. 7 is a configuration diagram showing Embodiment 5 of the present invention. A cooling fan 11 is attached to the rotor of the rotary electric machine 1 . The rotating electric machine 1 ventilates and cools the inside of the machine through the cooling fan 11 and the cooling ventilation mechanism 2 with variable air volume. The calculation mechanism 7 calculates the maximum temperature in the computer according to the detection values of the armature voltage detection mechanism 3, the armature current detection mechanism 4 and the ambient temperature detection mechanism 5, and then calculates the maximum temperature used to make the maximum temperature in the machine not exceed the predetermined limit value. the necessary air volume. The air volume control means 6 adjusts the air volume of the cooling ventilation means 2 to the air volume determined by the calculation means 7 .

FIG. 8 shows the calculation process of the maximum temperature. When performing the ventilation calculation, the air volume is also calculated in addition to the cooling fan air volume. Other processes are the same as in Example 1.

According to the configuration of this embodiment, even if the cooling ventilation mechanism stops, the cooling fan 11 can be used to ventilate the inside of the machine, and the operation can be continued by reducing the output.

[Example 6]

9 is a cross-sectional view showing a rotating electric machine in Embodiment 6 of the present invention. This embodiment, in Embodiment 1, is constituted by having the ventilation parts 13a to 13g which divide the rotary electric machine into a plurality of ventilation parts in the axial direction by the shelf 17 provided between the stator core 15 and the stator frame 16. The ventilation part is correspondingly provided with a plurality of ventilation mechanisms 14a-14g with variable air volumes, and the ventilation mechanisms 14a-14g can have different air volumes. In addition, the rotor 12 has no cooling fan.

In this case, an example of the temperature distribution of the armature winding calculated from the detected values of the armature voltage, armature current and ambient temperature is shown under the sectional view, where the limit temperature is 1.0 pu. The temperature distribution of the armature winding is calculated by dividing the network very finely. As shown in the figure, the detailed temperature distribution of each part can be obtained.

As shown in this example, when the temperature of the ventilation parts 13c and 13e exceeds the limit value, the air volume of the corresponding ventilation mechanisms 14c and 14e is increased.

According to the configuration of the present embodiment, by increasing the amount of ventilation only in necessary portions, it is possible to reduce losses due to unnecessary ventilation, and realize high-efficiency rotating electric machine operation.

In addition, based on the configuration of this embodiment, when the temperature distribution in the rotating electrical machine can be obtained in the same manner as in the fourth embodiment, and the comparison between the temperature detection value and the temperature calculation value shown in FIG. 17 is performed for each ventilation part In this case, the calculated temperature can also be corrected by ventilation section. That is, in FIG. 17, the temperature detection value 24a in the ventilating part a is greater than the temperature calculated value 25, and the difference is added to the calculated value for correction. On the contrary, the difference is subtracted from the calculated value for the ventilating part b. fix. Thereby, it is possible to further increase the accuracy of temperature calculation for each ventilation section.

[Example 7]

Fig. 15 is a configuration diagram showing a rotating electrical machine according to Embodiment 7 of the present invention. As the cooling ventilation mechanism with variable air volume, instead of the cooling fan 11, an axial fan 23 configured by attaching angle-variable blades to a rotor is used. Other constitutions are the same as in Embodiment 1. Fig. 16 shows an example of air volume-pressure characteristics of the air blower with respect to the blade angle. By adopting the axial fan 23 composed of angle-variable blades, it is possible to realize air volume control without greatly changing the configuration of the main body of the rotating electric machine.

[Embodiment 8]

Fig. 18 is a configuration diagram showing a power generation system according to Embodiment 8 of the present invention. The rotary electric machine 1 and the turbine 27 are connected via a connector not shown, the rotor is rotated by the power of the turbine, and the generated electric power is supplied to the electric system 28 . Operation and monitoring of the turbine 27 and the rotating electric machine 1 are performed in the command room 30 .

As described in Embodiment 4, the rotating electric machine 1 is provided with a plurality of temperature detectors 10 inside the machine, and the temperature is detected by the temperature detection mechanism 9 . The calculation mechanism calculates the maximum temperature in the computer according to the position of the temperature sensor 10 and the detected temperature, and then calculates the necessary air volume for making the maximum temperature in the machine not exceed the predetermined limit value. The air volume control means 6 adjusts the air volume of the cooling ventilation means 2 to the air volume determined by the calculation means 7 .

In addition, the rotating electrical machine 1 has an abnormality detection mechanism 29 for the detected temperature. When the temperature detection mechanism 9 detects a value exceeding a predetermined temperature, it notifies the command chamber 30 that an abnormality has occurred, and the command chamber 30 that receives the notification will respond to the abnormality. The output of the turbine 27 and the rotary electric machine 1 is adjusted.

As described above, according to the present invention, since the cooling air volume is controlled to a necessary amount based on the maximum temperature or the temperature distribution in the rotating electric machine, it is possible to ensure the maximum temperature in the machine without exceeding the limit value and ensure soundness. The cooling air volume inside the machine can be accurately controlled, so that the rotating electric machine can be operated with high efficiency.

In addition, according to the present invention, by providing a mechanism for calculating the maximum temperature inside the machine or the temperature distribution inside the machine, it is possible to control the air volume to a sufficient and necessary air volume even in a rotating electric machine installed at a location where the ambient temperature or load fluctuates sharply, and the air volume can be controlled at a high temperature. Efficiency keeps rotating electrical machines running.

In addition, according to the present invention, the control can be simplified by formulating or tabulating the required air volume with respect to the load or ambient temperature in advance.

Claims (15)

1, a kind of electric rotating machine possesses: the stator that is wound with armature winding on iron core; Rotatably be configured in the rotor of the internal side diameter concentric position of described stator; With the cooling channel mechanism that can regulate air quantity, in this electric rotating machine,

Also possess: the mechanism that measures ambient temperature; With detection armature voltage, armature supply, any one of exciting current or a plurality of mechanisms,

According to the detected value and the cooling air quantity command value of the measured value of described ambient temperature, described testing agency, calculate the temperature computation value in the electric rotating machine,

According to the temperature computation value in the described electric rotating machine, decide new cooling air quantity command value.

2, electric rotating machine according to claim 1 is characterized in that,

Decide cooling air quantity according to the mode that is no more than the limit temperature that is predetermined.

3, electric rotating machine according to claim 1 is characterized in that,

Temperature in the described electric rotating machine is the maximum temperature of electric rotating machine or the Temperature Distribution in the electric rotating machine.

4, electric rotating machine according to claim 1 is characterized in that,

In advance any one of described armature voltage, described armature supply, described ambient temperature, described cooling air quantity or the relation table of a plurality of and described new cooling air quantity command value are formatted.

5, electric rotating machine according to claim 1 is characterized in that,

Every the prediction time in advance with described new cooling air quantity command value formization.

6, electric rotating machine according to claim 1 is characterized in that,

Possess: the stator frame of taking in described stator and described rotor;

The aeration portion of between described stator frame and described stator, being cut apart vertically; With

Corresponding with each described aeration portion a plurality of described cooling channel mechanism,

To corresponding with each described aeration portion a plurality of described cooling channel mechanism each, determine described new cooling air quantity command value.

7, electric rotating machine according to claim 1 is characterized in that,

Described cooling channel mechanism is the blower fan of variable-ratio, one of the fan that is installed on rotor or both sides.

8, electric rotating machine according to claim 7 is characterized in that,

The fan that is installed on described rotor can change the angle of blade.

9, electric rotating machine according to claim 1 is characterized in that,

In electric rotating machine, have temperature testing organization,

According to applying correction, calculate the temperature in the described electric rotating machine by the detected temperature of described temperature testing organization.

10, electric rotating machine according to claim 1 is characterized in that,

Have abnormality detection mechanism,

Temperature computation value in described electric rotating machine has surpassed under the situation of setting, and is unusual to the order room notice of electric rotating machine.

11, electric rotating machine according to claim 1 is characterized in that,

Described electric rotating machine is a generator, and described generator is connected with turbine via connector, rotates by the power of described turbine by rotor and generates electricity, to electric power system or electric power storage facilities supply capability.

12, electric rotating machine according to claim 1 is characterized in that,

In replacement armature voltage, armature supply, the exciting current any one or a plurality of detected values, the setting of working voltage or electric current calculates the temperature computation value in the electric rotating machine.

13, electric rotating machine according to claim 12 is characterized in that,

Described setting is a design load.

14, electric rotating machine according to claim 12 is characterized in that,

Described setting is a command value.

15, a kind of electric rotating machine has: the stator that is wound with armature winding on iron core; Rotatably be configured in the rotor of the internal side diameter concentric position of described stator; With the cooling channel mechanism that can regulate air quantity, in this rotation electrode,

Also possesses the mechanism that the temperature in the electric rotating machine is detected; With detect in armature voltage, armature supply, the exciting current any one more than mechanism,

According to the temperature computation value of calculating by the detected value of the detected temperature of described temperature testing organization, testing agency and cooling air quantity command value in the electric rotating machine,

Decide new cooling air quantity command value according to the temperature computation value in the described electric rotating machine.

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