JP2016147577A - Cooling device for vehicular rotating machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling device for a vehicular rotating machine for cooling the rotating machine after an ignition-off operation of a vehicle is performed while preventing a battery from running out.SOLUTION: After an ignition-off operation of a hybrid vehicle is performed, when detection values obtained by a first temperature sensor 36 and a second temperature sensor 37 are a threshold value or higher, a hybrid ECU 60 determines whether each of a blower 43, a first cooling fluid pump 72, a second cooling fluid pump 74 and a fan 77 continues to be in an operating state or is stopped on the basis of charge amount of an accessory battery 35.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cooling device for a rotating electrical machine for a vehicle.

  A hybrid vehicle having an engine and a rotating electric machine as a power source is usually provided with an engine cooling system and a rotating electric machine cooling system. Each of these cooling systems cools the cooling water and the circulation paths of oil for cooling the engine and the rotating electrical machine, the cooling water circulation paths for cooling the oil by exchanging heat with the oil, and the cooling water, respectively. A radiator and a fan, and a pump for circulating oil and cooling water are provided. When the rotating electric machine has a slip ring, a blower that is a cooling system for cooling the slip ring is also provided. These cooling systems are driven at least when the engine and the rotating electric machine are driven. When the hybrid vehicle is stopped by performing an ignition off operation for turning off the key switch, the start button, and the like, the respective cooling systems are also stopped.

However, when the rotating electrical machine stops, the temperature rise does not always stop, and the temperature may continue to rise after the stop. In particular, in the case of a double rotor motor having two rotors, an inner rotor and an outer rotor, such a phenomenon is likely to occur because heat dissipation is poor due to the structure. When the temperature of the rotating electrical machine continues to rise after the cooling system stops and exceeds the upper limit temperature of the motor repeatedly, the insulating paper of the rotating electrical machine coil deteriorates, the cooling oil deteriorates, or the brush that contacts the slip ring There is a possibility that an influence such as abnormal wear may occur.
In order to avoid such a possibility, it is only necessary to continue driving the cooling system with the battery power for a certain period of time even after the ignition off operation of the hybrid vehicle, but when the cooling system is driven with the battery power, There was a problem that the amount of charge would decrease.
Patent Document 1 describes a cooling device that cools an engine and a rotating electrical machine after an ignition-off operation of a hybrid vehicle while minimizing battery power consumption.

Japanese Patent Laid-Open No. 10-238345

  However, the cooling device described in Patent Document 1 does not change the driving of the cooling system with the power of the battery regardless of the amount of charge of the battery, and thus cannot completely prevent the battery from rising. There was a problem.

  The present invention has been made to solve such problems, and provides a cooling device for a rotating electrical machine for a vehicle that cools the rotating electrical machine after an ignition-off operation of the vehicle while preventing the battery from running up. For the purpose.

A cooling apparatus for a rotating electrical machine for a vehicle according to the present invention includes a rotating electrical machine for driving a vehicle, a battery for supplying electric power for driving the rotating electrical machine to the rotating electrical machine, and charging electric power generated by the rotating electrical machine, A rotating electrical machine cooling system having a first cooling fluid pump that circulates a first cooling fluid for cooling the rotating electrical machine, temperature detecting means for detecting the temperature of the rotating electrical machine, and charge amount detecting means for detecting the charge amount of the battery And a control device that controls the operation of the rotating electrical machine cooling system, and after the ignition-off operation of the vehicle, when the detected value by the temperature detecting means is equal to or higher than a threshold value preset in the control device, the control device When the detection value by the detection means is less than a first predetermined value preset in the control device, the first cooling fluid pump is stopped, and when the detection value by the charge amount detection means is equal to or greater than the first predetermined value In The first cooling fluid pump into the drive state.
The rotating electrical machine cooling system further includes a second cooling fluid pump that circulates a second cooling fluid that cools the first cooling fluid by exchanging heat with the first cooling fluid. A second predetermined value having a higher value is preset, and the control device turns on the second cooling fluid pump when the value detected by the charge amount detecting means is equal to or greater than the first predetermined value and less than the second predetermined value. The second cooling fluid pump may also be driven when the value detected by the charge amount detection means is equal to or greater than the second predetermined value.
The rotating electrical machine includes a slip ring mechanism that supplies electric power from the battery to the rotating electrical machine, the cooling device includes a slip ring mechanism cooling mechanism that cools the slip ring mechanism, and the control device has a higher than a second predetermined value. A third predetermined value is set in advance, and the control device stops the slip ring mechanism cooling mechanism when the value detected by the charge amount detection means is greater than or equal to the second predetermined value and less than the third predetermined value. The slip ring mechanism cooling mechanism may also be in the drive state when the detection value by the charge amount detection means is equal to or greater than the third predetermined value.
The operation of the cooling mechanism for the slip ring mechanism may be continued without stopping simultaneously with the ignition off operation of the vehicle.
The rotating electrical machine cooling system further includes a second cooling fluid cooling mechanism that cools the second cooling fluid, and the control device detects when the value detected by the charge amount detection means is greater than or equal to the third predetermined value and less than the fourth predetermined value. The second cooling fluid cooling mechanism may be in a stopped state, and the second cooling fluid cooling mechanism may be in a driving state when the detected value by the charge amount detection means is equal to or greater than a fourth predetermined value.
The vehicle may be a hybrid vehicle having a rotating electrical machine and an engine.
The rotating electrical machine may include a first rotor and a second rotor disposed on the radially outer side of the first rotor.
You may continue without stopping operation | movement of a rotary electric machine cooling system simultaneously with the ignition-off operation of a vehicle.

  According to this invention, when the temperature of the rotating electrical machine is high during the ignition-off operation of the vehicle, the operation of the rotating electrical machine cooling system is determined to be stopped or driven depending on the amount of charge of the battery. The rotating electric machine can be cooled after the ignition-off operation of the vehicle while preventing the vehicle from rising.

It is a figure which shows the structure of the cooling device of the rotary electric machine for vehicles which concerns on embodiment of this invention. It is a flowchart which shows operation | movement of the cooling device of the rotary electric machine for vehicles which concerns on this embodiment. It is a figure which shows the structure of the modification of the cooling device of the rotary electric machine for vehicles which concerns on this embodiment.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows the configuration of a cooling apparatus 100 for a vehicular rotating electrical machine according to an embodiment of the present invention. The cooling device 100 is provided in a hybrid vehicle including a diesel engine 10 that is an internal combustion engine that generates power by burning light oil inside, and a double rotor motor 20 that is a rotating electrical machine that operates by three-phase AC power as a power source. It has been. The double rotor motor 20 is mechanically coupled to the drive shaft 11 of the diesel engine 10 and is disposed on the radially outer side of the inner rotor 21 of the first rotor that rotates integrally with the drive shaft 11. The second rotor outer rotor 22 is mechanically coupled to the axle 14 via the arm 12 and the differential 13, and the stator 23 is disposed radially outside the outer rotor 22 and fixed to the motor casing 24. doing. The inner rotor 21 has a cylindrical shape, the outer rotor 22 and the stator 23 have an annular shape, and their cross sections are schematically shown in FIG.

  The inner rotor 21 is provided with a first coil 25, and the stator 23 is provided with a second coil 26. A first magnet 27 is provided on the inner peripheral side of the outer rotor 22 so as to face the first coil 25 of the inner rotor 21. A second coil of the stator 23 is provided on the outer peripheral side of the outer rotor 22. A second magnet 28 is provided so as to face 26. Each of the first coil 25 and the second coil 26 is provided with a first temperature sensor 36 and a second temperature sensor 37 which are temperature detecting means. In this embodiment, the temperature of the first coil 25 and the second coil 26 is defined as the temperature of the double rotor motor 20.

  The cooling device 100 includes a battery 30 that is power supply means capable of charging and discharging DC power, and a first inverter 31 and a second inverter 32 that convert DC power output from the battery 30 into three-phase AC power. The first inverter 31 and the second inverter 32 are controlled by a hybrid ECU 60 that is a control device. The battery 30 includes a secondary battery 33 electrically connected to each of the first inverter 31 and the second inverter 32, a DC / DC converter 34 electrically connected to the secondary battery 33, and a DC / DC converter. 34 and an auxiliary battery 35 electrically connected to 34. The hybrid ECU 60 detects the charge amount of the auxiliary battery 35 from the voltage of the auxiliary battery 35 or the like. Here, the hybrid ECU 60 constitutes a charge amount detecting means for detecting the charge amount of the auxiliary battery 35.

  The three-phase AC power output from the first inverter 31 is supplied to the second coil 26 of the stator 23. On the other hand, the three-phase AC power output from the second inverter 32 is transmitted to a conductive wire (not shown) wired along the drive shaft 11 via a slip ring mechanism 40 constituted by a fixed brush 41 and a slip ring 42. Then, this conductive wire is supplied to the first coil 25 of the inner rotor 21. As a cooling mechanism for a slip ring mechanism for cooling the slip ring mechanism 40, a blower 43 that sends cold air such as air to the fixed brush 41 and the slip ring 42 is provided.

  The cooling device 100 is provided with a rotating electrical machine cooling system 70 that cools the double rotor motor 20. The rotating electrical machine cooling system 70 includes a first cooling fluid circulation path 71 through which oil as a first cooling fluid for cooling the double rotor motor 20, particularly the first coil 25 and the second coil 26 circulates, and a first through which oil is circulated. Cooling fluid pump 72, second cooling fluid circulation path 73 through which water as the second cooling fluid circulates, second cooling fluid pump 74 through which water circulates, and oil through the first cooling fluid circulation path 71 A heat exchanger 75 that exchanges heat between the water circulating through the second cooling fluid circulation path 73 and a radiator 76 and a fan that are the second cooling fluid cooling mechanism 78 that cools the water circulating through the second cooling fluid circulation path 73 77. The driving and stopping of the first cooling fluid pump 72, the second cooling fluid pump 74, and the fan 77 are controlled by the hybrid ECU 60.

  The cooling device 100 is provided with an internal combustion engine cooling system 80 that cools the diesel engine 10. The internal combustion engine cooling system 80 includes an oil circulation path 81 through which oil for cooling the diesel engine 10 circulates, an oil pump 82 through which oil circulates, a water circulation path 83 through which water circulates, and a water pump 84 through which water circulates. A heat exchanger 85 that exchanges heat between the oil that circulates in the oil circulation path 81 and the water that circulates in the water circulation path 83, a radiator 86 that is a water cooling mechanism 88 that cools the water that circulates in the water circulation path 83, and a fan 87. And. Driving and stopping of the oil pump 82, the water pump 84, and the fan 87 are controlled by the internal combustion engine ECU 50.

  Each of the first temperature sensor 36 and the second temperature sensor 37 and the hybrid ECU 60 are electrically connected, and their detected values are transmitted to the hybrid ECU 60. The internal combustion engine ECU 50 and the hybrid ECU 60 are electrically connected to each other and can communicate with each other. Further, the blower 43, the first cooling fluid pump 72, the second cooling fluid pump 74, the fan 77, the oil pump 82, the water pump 84, and the fan 87 include the auxiliary battery 35. Then, electric power is supplied through a wiring (not shown).

Next, the operation of the cooling device 100 according to this embodiment will be described.
When the driver operates a key switch or a start button (not shown) to start the hybrid vehicle and drive the diesel engine 10 and the double rotor motor 20, respectively, the internal combustion engine cooling system 80 and the rotating electrical machine cooling system 70 also Driven to cool each of the diesel engine 10 and the double rotor motor 20.

  Specifically, the hybrid ECU 60 starts each of the first cooling fluid pump 72, the second cooling fluid pump 74, and the fan 77. Then, the oil circulates through the first cooling fluid circulation path 71, whereby the double rotor motor 20, in particular, the first coil 25 and the second coil 26 are cooled by the oil. The temperature of the oil rises as the first coil 25 and the second coil 26 are cooled. In the heat exchanger 75, the oil and the second cooling fluid pump 74 circulate through the second cooling fluid circulation path 73. Oil is cooled by heat exchange with water. Although the temperature of the water rises as the oil is cooled, in the radiator 76, the water is cooled by the air blown by the fan 77.

  On the other hand, the internal combustion engine ECU 50 starts each of the oil pump 82, the water pump 84, and the fan 87. Then, the oil circulates through the oil circulation path 81, whereby the diesel engine 10 is cooled by the oil. Although the temperature of the oil rises as the diesel engine 10 is cooled, in the heat exchanger 85, the oil is cooled by heat exchange between the oil and the water circulating in the water circulation path 83 by the water pump 84. . Although the temperature of the water rises as the oil is cooled, in the radiator 86, the water is cooled by the air blown by the fan 87.

  Further, when the hybrid vehicle is driven by the power of the double rotor motor 20, the DC power fed from the secondary battery 33 is converted into AC power by the second inverter 32, and this AC power passes through the slip ring mechanism 40. The first coil 25 is supplied with power. At this time, the fixed brush 41 and the slip ring 42 generate heat, but when the hybrid ECU 60 drives the blower 43, air is blown to the fixed brush 41 and the slip ring 42, so that the fixed brush 41 and the slip ring 42 are cooled. The

  Next, the operation of the cooling device 100 when the hybrid vehicle is stopped by an ignition off operation for turning off a key switch or a start button (not shown) will be described with reference to the flowchart of FIG. When the hybrid vehicle is stopped by the ignition-off operation, the DC / DC converter 34 is stopped, so that the supply of power from the secondary battery 33 to the auxiliary battery 35 is stopped.

  When the hybrid vehicle is stopped by the ignition-off operation (step S1), the internal combustion engine ECU 50 stops each of the oil pump 82, the water pump 84, and the fan 87, and stops driving the internal combustion engine cooling system 80. . Subsequent to step S1, the hybrid ECU 60 detects whether the detected values of the first temperature sensor 36 and the second temperature sensor 37 are equal to or greater than a threshold value (110 ° C. in this embodiment) preset in the hybrid ECU 60. Is determined (step S2). When it is determined that the detected values by the first temperature sensor 36 and the second temperature sensor 37 are less than the threshold value, the hybrid ECU 60 does not need to continue cooling the double rotor motor 20. The pump 72, the second cooling fluid pump 74, and the fan 77 are stopped, the drive of the rotating electrical machine cooling system 70 is stopped, and the blower 43 is also stopped to stop the operation of the cooling device 100 ( Step S10).

  On the other hand, when it is determined in step S <b> 2 that the detection values by the first temperature sensor 36 and the second temperature sensor 37 are equal to or greater than the threshold value, the hybrid ECU 60 detects the charge amount of the auxiliary battery 35. The hybrid ECU 60 previously has a first predetermined value (10% in this embodiment), a second predetermined value (20% in this embodiment), and a third predetermined value (in this embodiment). 30%) and a fourth predetermined value (40% in this embodiment) are set. The hybrid ECU 60 determines the magnitude relationship between the charge amount of the auxiliary battery 35 and each of the first predetermined value to the fourth predetermined value (step S3).

  In step S3, when the charge amount of the auxiliary machine battery 35 is less than the first predetermined value, the auxiliary battery 35 may rise if the rotating electrical machine cooling system 70 is continuously driven. The first cooling fluid pump 72, the second cooling fluid pump 74, and the fan 77 are stopped, the rotating electrical machine cooling system 70 is stopped, and the blower 43 is also stopped to operate the cooling device 100. Stop (step S10). Thereby, the fall of the charge amount of the auxiliary battery 35 can be prevented.

  In step S3, when the charge amount of the auxiliary battery 35 is greater than or equal to the first predetermined value and less than the second predetermined value, the hybrid ECU 60 sets the drive state in which only the first cooling fluid pump 72 is driven, and the blower 43 Then, each of the second cooling fluid pump 74 and the fan 77 is stopped (step S4). Since the first cooling fluid pump 72 is driven, oil circulates through the first cooling fluid circulation path 71, so that the first coil 25 and the second coil 26 can be cooled even after the ignition of the hybrid vehicle is turned off. It becomes. Thereby, the temperature rise of the double rotor motor 20 after the ignition off operation of a hybrid vehicle can be prevented.

  However, in the case of step S4, since the second cooling fluid pump 74 is in a stopped state, the temperature of the oil rises as the first coil 25 and the second coil 26 are cooled. However, the rise in the temperature of the double rotor motor 20 after the stop operation of the hybrid vehicle is a relatively short temporary phenomenon, so that there is a sufficient cooling effect or the first time until the oil temperature rises. Since the coil 25 and the second coil 26 can be cooled, the cooling effect of the double rotor motor 20 is greater than in the case of step S3 in which the cooling is not performed after the ignition-off operation of the hybrid vehicle.

  In step S3, when the charge amount of the auxiliary battery 35 is greater than or equal to the second predetermined value and less than the third predetermined value, the hybrid ECU 60 keeps driving the first cooling fluid pump 72 and the second cooling fluid pump 74. And the blower 43 and the fan 77 are stopped (step S5). In the case of step S5, not only the first cooling fluid pump 72 but also the second cooling fluid pump 74 is driven, so that each of the first cooling fluid circulation path 71 and the second cooling fluid circulation path 73 is oiled. And water circulates. As the oil circulates through the first cooling fluid circulation path 71, the first coil 25 and the second coil 26 can be cooled even after the ignition-off operation of the hybrid vehicle, as in step S4. However, since the water circulates in the second cooling fluid circulation path 73, the oil whose temperature has increased with the cooling of the first coil 25 and the second coil 26 is cooled by the water in the heat exchanger 75, Compared with the case of S4, the cooling effect of the double rotor motor 20 is increased.

  In step S3, when the charge amount of the auxiliary battery 35 is not less than the third predetermined value and less than the fourth predetermined value, the hybrid ECU 60 performs the blower 43, the first cooling fluid pump 72, and the second cooling fluid pump 74. Are driven and only the fan 77 is stopped (step S6). In the case of step S6, the first cooling fluid pump 72 and the second cooling fluid pump 74 are driven in the rotating electrical machine cooling system 70 as in step S5. Same as S5. However, since the blower 43 is driven, the slip ring mechanism 40 can be cooled even after the ignition off operation of the hybrid vehicle. Therefore, the temperature of the slip ring mechanism 40 increases after the ignition off operation of the hybrid vehicle. In this case, the temperature rise of the slip ring mechanism 40 can be stopped or suppressed.

  In step S3, when the charge amount of the auxiliary battery 35 is equal to or greater than the fourth predetermined value, the hybrid ECU 60 performs the blower 43, the first cooling fluid pump 72, the second cooling fluid pump 74, and the fan 77. Are driven (step S7). In step S7, since all the rotating devices of the rotating electrical machine cooling system 70 are driven, the rotating electrical machine cooling system 70 can cool the first coil 25 and the second coil 26 with the maximum capacity. That is, the cooling effect of the double rotor motor 20 is greater than in any of steps S4 to S6. Further, since the blower 43 is driven, the slip ring mechanism 40 can be cooled as in the case of step S6.

  If the number of rotating devices to be driven increases, the cooling effect of the double rotor motor 20 and the slip ring mechanism 40 increases, but the charge amount of the auxiliary battery 35 decreases, and in some cases, the auxiliary battery 35 may rise. There is also sex. However, in this embodiment, it is determined which rotating device is to be driven, that is, which of the steps S4 to S7 is shifted according to the charge amount of the auxiliary battery 35, so that the auxiliary battery 35 is raised. Thus, the double rotor motor 20 and the slip ring mechanism 40 can be cooled.

When the process proceeds from step S3 to any one of steps S4 to S7, the hybrid ECU 60 calculates the difference between the two values before and after the appropriate interval between the detected values of the first temperature sensor 36 and the second temperature sensor 37. By calculating, the transition of the temperature of the double rotor motor 20 is determined. That is, for each of the first temperature sensor 36 and the second temperature sensor 37, the detection value T _{t-1 at} a certain time (t-1) and the detection value at a time t after an appropriate interval from the time (t-1). calculating the difference between T _t a _{(T t -T t-1)} , determines whether less than if the value is 0 or more (step S8). When T _t −T _t−1 <0, it can be determined that the temperature of the double rotor motor 20 has stopped rising, so the rotating electrical machine cooling system 70 and the blower 43 are stopped and the operation of the cooling device 100 is stopped. (Step S10).

On the other hand, if T _t −T _t−1 ≧ 0 in step S8, it can be determined that the temperature of the double rotor motor 20 continues to rise. In this case, the hybrid ECU 60 detects the charge amount of the auxiliary battery 35 and determines whether or not the charge amount is equal to or greater than a first predetermined value (step S9). If the amount of charge is equal to or greater than the first predetermined value, it is determined that cooling of the double rotor motor 20 can be continued, and the process returns to step S8. On the other hand, if the charge amount is less than the first predetermined value, the rotating electrical machine cooling system 70 and the blower 43 are stopped and the operation of the cooling device 100 is stopped in order to prevent the auxiliary battery 35 from rising. (Step S10).

  As described above, when the temperature of the double rotor motor 20 is high during the ignition off operation of the hybrid vehicle, the operation of each rotating device of the rotating electrical machine cooling system 70 is stopped or driven according to the charge amount of the auxiliary battery 35. Since it is determined whether to make the state, the double rotor motor 20 can be cooled after the ignition-off operation of the hybrid vehicle while preventing the auxiliary battery 35 from rising.

  In this embodiment, water for cooling the oil flowing through each of the first cooling fluid circulation path 71 and the oil circulation path 81 circulates through different paths, that is, the second cooling fluid circulation path 73 and the water circulation path 83, respectively. However, it is not limited to this form. As shown in FIG. 3, the water for cooling the oil flowing through each of the first cooling fluid circulation path 71 and the oil circulation path 81 is shared, and the water circulates through the second cooling fluid circulation path 73. May be. In this case, two heat exchangers 75 and 85 are provided in the second cooling fluid circulation path 73. In this embodiment, the first cooling fluid is oil and the second cooling fluid is water. However, the present invention is not limited to this mode, and a known fluid that can be used for cooling may be used.

  In this embodiment, during the stop operation of the hybrid vehicle, the rotation devices of the blower 43 and the rotating electrical machine cooling system 70 are continuously driven without being stopped, and are brought into a stopped state according to the charge amount of the auxiliary battery 35. However, the present invention is not limited to this mode. During the stop operation of the hybrid vehicle, each rotating device of the blower 43 and the rotating electrical machine cooling system 70 may be temporarily stopped, and the rotating device to be brought into the driving state may be started again.

  In this embodiment, the internal combustion engine is the diesel engine 10, but it may be a gasoline engine. Further, the rotary electric machine is the double rotor motor 20 having two rotors of the inner rotor 21 and the outer rotor 22, but may be a motor having one rotor. A motor without the stator 23 may be used. Moreover, the motor which does not have the slip ring mechanism 40 may be sufficient. Furthermore, in this embodiment, the vehicle is a hybrid vehicle, but it may be an electric vehicle that does not have an internal combustion engine and is driven only by a rotating electrical machine.

  In this embodiment, each of the first temperature sensor 36 installed in the first coil 25 wound around the inner rotor 21 and the second temperature sensor 37 installed in the second coil 26 wound around the stator 23. , That is, the temperature of each of the first coil 25 and the second coil is the temperature of the double rotor motor 20, but is not limited to this form. Only one of the first temperature sensor 36 and the second temperature sensor 37 may be provided, and the detected value may be the temperature of the double rotor motor 20.

  The specific numerical values of the threshold and the first predetermined value to the fourth predetermined value in this embodiment are merely examples, and can be set as appropriate depending on the configuration of the internal combustion engine and the rotating electric machine.

  DESCRIPTION OF SYMBOLS 10 Engine, 20 Double rotor motor (rotary electric machine), 21 Inner rotor (1st rotor), 22 Outer rotor (2nd rotor), 30 Battery, 36 1st temperature sensor (temperature detection means), 37 2nd temperature Sensor (temperature detection means), 40 slip ring mechanism, 43 blower (cooling mechanism for slip ring mechanism), 60 hybrid ECU (control device, charge amount detection means), 70 rotating electrical machine cooling system, 72 first cooling fluid pump, 74 Second cooling fluid pump, 78 Second cooling fluid cooling mechanism, 100 Cooling device.

Claims (8)

A rotating electric machine for driving the vehicle;
A battery for supplying electric power for driving the rotating electric machine to the rotating electric machine and charging the electric power generated by the rotating electric machine;
A rotating electrical machine cooling system having a first cooling fluid pump for circulating a first cooling fluid for cooling the rotating electrical machine;
Temperature detecting means for detecting the temperature of the rotating electrical machine;
Charge amount detecting means for detecting the charge amount of the battery;
A control device for controlling the operation of the rotating electrical machine cooling system,
After the ignition off operation of the vehicle, when the detected value by the temperature detecting means is equal to or greater than a threshold value preset in the control device,
The controller is
When the detection value by the charge amount detection means is less than a first predetermined value preset in the control device, the first cooling fluid pump is stopped,
A cooling apparatus for a rotating electrical machine for a vehicle, wherein when the value detected by the charge amount detection means is equal to or greater than the first predetermined value, the first cooling fluid pump is driven. The rotating electrical machine cooling system further includes a second cooling fluid pump for circulating a second cooling fluid that cools the first cooling fluid by exchanging heat with the first cooling fluid,
In the control device, a second predetermined value higher than the first predetermined value is preset,
The controller is
When the detection value by the charge amount detection means is not less than the first predetermined value and less than the second predetermined value, the second cooling fluid pump is stopped.
2. The cooling device for a rotating electrical machine for a vehicle according to claim 1, wherein the second cooling fluid pump is also driven when a value detected by the charge amount detection means is equal to or greater than the second predetermined value. The rotating electrical machine includes a slip ring mechanism that supplies electric power from the battery to the rotating electrical machine,
The cooling device includes a cooling mechanism for a slip ring mechanism that cools the slip ring mechanism,
In the control device, a third predetermined value higher than the second predetermined value is preset,
The controller is
When the detected value by the charge amount detecting means is not less than the second predetermined value and less than the third predetermined value, the slip ring mechanism cooling mechanism is stopped.
The cooling device for a vehicular rotating electrical machine according to claim 2, wherein the slip ring mechanism cooling mechanism is also driven when a value detected by the charge amount detecting means is equal to or greater than the third predetermined value.   The cooling device for a rotating electrical machine for a vehicle according to claim 3, wherein the operation of the cooling mechanism for the slip ring mechanism is continued without stopping simultaneously with the ignition off operation of the vehicle. The rotating electrical machine cooling system further includes a second cooling fluid cooling mechanism for cooling the second cooling fluid,
The controller is
When the detected value by the charge amount detecting means is not less than the third predetermined value and less than the fourth predetermined value, the second cooling fluid cooling mechanism is stopped.
The cooling device for a rotating electrical machine for a vehicle according to claim 3 or 4, wherein the second cooling fluid cooling mechanism is also in a driving state when a value detected by the charge amount detection means is equal to or greater than the fourth predetermined value.   The cooling device for a rotating electrical machine for a vehicle according to any one of claims 1 to 5, wherein the vehicle is a hybrid vehicle having the rotating electrical machine and an engine.   The rotating electrical machine according to any one of claims 1 to 6, wherein the rotating electrical machine includes a first rotor and a second rotor disposed on a radially outer side of the first rotor. Cooling system.   The cooling device for a rotating electrical machine for a vehicle according to any one of claims 1 to 7, wherein the operation of the rotating electrical machine cooling system is continued without stopping at the same time as the ignition-off operation of the vehicle.

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