JP2019030096A - Cooling system for rotary electric machine - Google Patents

Abstract

To provide a cooling system for a rotary electric machine that automatically removes a clogging of a filter member which removes dust in oil for cooling a rotary electric machine.SOLUTION: Power of an oil pump 8 is reduced by power transmission means 24 and is transmitted to a rotor member 23, causing the rotor member 23 to be rotated. When the rotor member 23 is rotated during the operation of the oil pump 8, the outermost layer of a filter layer 33 is gradually wound onto the rotor member 23 and is automatically removed from the filter member 22. Thus, the outermost layer of the filter layer 33 is constantly replaced by a new layer even when dust is accumulated onto the outermost layer of the filter layer 33.SELECTED DRAWING: Figure 2

Description

  The present disclosure relates to a cooling system for a rotating electrical machine.

  A rotating electrical machine such as a motor or a generator provided in a plug-in hybrid electric vehicle (PHEV) or the like has a stator and a rotor that rotates with respect to the stator. In many cases, a magnet is provided in the rotor, and the stator A coil is wound around. When the motor is driven and when the generator generates power, the coil generates heat due to current flowing through the coil. Oil is supplied to the coil to cool the coil. The oil that has cooled the motor and generator coils is collected in an oil pan and supplied again to the motor and generator coils by an oil pump.

  Since dust is mixed into the oil while the oil circulates in this way, a filter member is generally provided upstream of the oil pump. When clogging of the filter member occurs, the filter member can be cleaned or replaced at the time of vehicle inspection such as PHEV or periodic inspection, but it is usually not possible to recognize that the clogging has occurred, and cleaning of the filter member Or it cannot be exchanged.

  In general, when a filter member provided in an arbitrary device is clogged, there is a case where a technique of scraping a deposit deposited on the filter member with a member such as a scraper may be used. Although it is a technical field different from the filter member provided in PHEV etc., such a technique is disclosed by patent document 1. FIG.

Japanese Patent Laying-Open No. 2005-13818 (FIG. 4)

  However, it is generally difficult to provide the PHEV with a device that scrapes off deposits deposited on the filter member during PHEV traveling.

  In view of the above circumstances, at least one embodiment of the present invention aims to provide a cooling system for a rotating electrical machine that automatically removes clogging of a filter member that removes dust in oil that cools the rotating electrical machine. And

  A cooling system for a rotating electrical machine according to at least one embodiment of the present invention includes an oil pan that stores oil that cools a coil of the rotating electrical machine, and an oil pump that supplies the oil stored in the oil pan to the coil. A cylindrical filter member rotatably provided in the oil pan, wherein the sheet-like filter layer is wound so as to be rewound so that the oil passes through the filter layer. And a rotor member that is rotatably provided in the oil pan and is not fixed to the filter member with respect to a winding direction of the filter layer, and a power of the oil pump is shifted. Power transmission means for transmitting to the rotor member, and by the power of the oil pump transmitted by the power transmission means By rotating the serial rotor member, characterized in that the filter layer wound around the filter member is rollable said rotor member.

  According to such a configuration, the power of the oil pump rotates the rotor member, and the filter layer is automatically removed from the filter member by winding the sheet-like filter layer wound around the filter member around the rotor member. Therefore, the clogging of the filter member can be automatically removed.

In some embodiments, the rotor member always winds the filter layer at a first rotational speed.
According to such a configuration, the filter layer is wound around the rotor member and automatically removed from the filter member, so that even when dust accumulates on the filter layer, the outermost layer of the filter layer always becomes a new layer. Since it is replaced, the clogging of the filter member can be automatically removed.

In some embodiments, the apparatus further includes an oil flow rate detection unit that detects a flow rate of oil sucked by the oil pump, and a control unit, wherein the control unit has a specified value for a detection value by the oil flow rate detection unit. Rotation for controlling the power transmission means so as to switch the specified value setting section and the rotation speed of the rotor member between the first rotation speed and a second rotation speed larger than the first rotation speed. A rotation number switching execution unit, and when the detected value by the oil flow rate detecting means falls below the specified value, the rotation number switching execution unit changes the rotation number of the rotor member from the first rotation number to the second rotation number. By switching to the rotation speed, at least a portion corresponding to the outermost layer of the filter layer wound around the filter member is wound on the rotor member, and a portion corresponding to the at least outermost layer is When wound in over data member, the rotational speed switching execution unit, by the power transmission means is switched to the first rotation speed from the second rotation speed the rotational speed of the rotor member.
According to such a configuration, it is possible to recognize the clogging of the filter member from the decrease in the flow rate of the oil sucked by the oil pump, and when the clogging of the filter member is recognized, the outermost layer of the filter layer in which the clogging has occurred is detected. The clogging of the filter member can be automatically removed quickly by removing it quickly.

In some embodiments, an oil flow rate detection unit that detects a flow rate of oil sucked by the oil pump, a clutch mechanism unit that connects and disconnects transmission of power from the oil pump to the rotor member, and a control unit are further provided. The control unit includes a specified value setting unit in which a specified value for the detection value by the oil flow rate detection unit is set, and connection of transmission of power from the oil pump to the rotor member by the clutch mechanism unit; A power transmission switching unit for switching the separation, and when the detected value by the oil flow rate detection means falls below the specified value, the power transmission switching unit is moved from the oil pump to the rotor member by the clutch mechanism unit. The power transmission of the oil pump is shifted by the power transmission means to the rotor member. And at least a portion corresponding to the outermost layer of the filter layer wound around the filter member is wound on the rotor member, and after the winding onto the rotor member is completed, the clutch mechanism portion The transmission of power from the oil pump to the rotor member is disconnected.
According to such a configuration, only when it is necessary to remove the outermost layer of the filter layer, the clogged filter layer can be removed, so that the usage period of the filter member can be extended.

In some embodiments, the control unit is configured to measure the number of times that at least a portion corresponding to the outermost layer of the filter layer wound around the filter member is wound around the rotor member. The rotating electrical machine cooling system further includes a display unit for displaying the number of times.
According to such a configuration, the driver can determine whether or not the filter member needs to be replaced based on the number of windings of the outermost layer of the filter layer.

In some embodiments, the control unit includes a winding number measuring unit that measures the number of times at least a portion corresponding to the outermost layer of the filter layer wound around the filter member is wound around the rotor member. A winding possible number setting unit in which a winding possible number that is a number of times at which a portion corresponding to at least the outermost layer of the filter layer wound around the filter member can be wound on the rotor member is set; A filter member replacement determination unit that determines whether or not the filter member needs to be replaced based on the number of times and the number of windings, and the cooling system for the rotating electrical machine sets the number of times to the number of windings that can be wound. When the filter member replacement determination unit determines that it has arrived, the display unit further includes a display unit that displays a notification of replacement of the filter member.
According to such a configuration, the driver can easily recognize that the filter member needs to be replaced.

  According to at least one embodiment of the present invention, the oil pump power rotates the rotor member, and the filter member is wound around the rotor member by winding the sheet-like filter layer wound around the filter member. Since the layer is automatically removed from the filter member, clogging of the filter member can be automatically removed.

It is the schematic which shows the whole structure of the cooling system of the rotary electric machine which concerns on Embodiment 1 of this invention. It is the schematic which shows the structure of the oil filter apparatus of the cooling system of the rotary electric machine which concerns on Embodiment 1 of this invention. It is a schematic perspective view of the filter member and rotor member which comprise the oil filter apparatus of the cooling system of the rotary electric machine which concerns on Embodiment 1 of this invention. It is the schematic which shows the structure of the oil filter apparatus of the cooling system of the rotary electric machine which concerns on Embodiment 2 of this invention. It is the schematic which shows the structure of the oil filter apparatus of the cooling system of the rotary electric machine which concerns on Embodiment 3 of this invention. It is the schematic which shows the structure of the oil filter apparatus of the cooling system of the rotary electric machine which concerns on Embodiment 4 of this invention. It is the schematic which shows the structure of the oil filter apparatus of the cooling system of the rotary electric machine which concerns on Embodiment 5 of this invention. It is a flowchart for demonstrating operation | movement of the cooling system of the rotary electric machine which concerns on Embodiment 5 of this invention.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
However, the scope of the present invention is not limited to the following embodiments. The dimensions, materials, shapes, relative arrangements, and the like of the component parts described in the following embodiments are not merely intended to limit the scope of the present invention, but are merely illustrative examples.

(Embodiment 1)
As shown in FIG. 1, the rotating electrical machine 2 including the generator 3 and the motor 4 includes a cooling system for cooling the coils 43 and 53 wound around the stators 41 and 51 of the generator 3 and the motor 4 with oil. 1 is provided. Inside the stators 41 and 51, rotors 42 and 52 provided with magnets (not shown) are rotatably provided with respect to the stators 41 and 51, respectively. The cooling system 1 includes an oil circulation path 5 through which oil that cools the coils 43 and 53 circulates, an oil cooling mechanism 6 that cools the oil, an oil filter device 7 that removes dust mixed in the oil, and an oil circulation path. 5, an oil pump 8 that circulates oil, an oil temperature sensor 9 provided upstream of the rotating electrical machine 2 in the direction in which the oil circulates in the oil circulation path 5, and an ECU 10 that is a control unit that controls the operation of the rotating electrical machine 2. And.

  The oil cooling mechanism 6 includes a bypass valve 11 provided downstream of the oil pump 8 with respect to the direction in which oil flows in the oil circulation path 5, an oil cooling circulation path 12 connected to the bypass valve 11, and an oil cooling circulation. And an oil cooler 13 provided in the passage 12. The oil cooler 13 may be a cooler such as an air cooling type or a water cooling type. The oil temperature sensor 9 and the bypass valve 11 are electrically connected to the ECU 10.

  As shown in FIG. 2, the oil filter device 7 includes an oil pan 21 that collects and stores the oil that has cooled the coils 43 and 53, and a cylindrical filter member 22 that is rotatably provided inside the oil pan 21. And a cylindrical rotor member 23 rotatably provided inside the oil pan 21 and a power transmission means 24 for transmitting the rotational power of the oil pump 8 to the rotor member 23. The power transmission means 24 is a transmission composed of a plurality of gears. One hole 26 is formed in the wall portion 21 a of the oil pan 21, one end of the oil circulation pipe 25 which is a part of the oil circulation path 5 is connected to the hole 26, and the other end of the oil pump 8. Connected to the suction port.

  As shown in FIG. 3, the filter member 22 has a cylindrical shape as a whole. The filter member 22 includes therein a cylindrical inner space 31 in which one end is closed in the axial direction and the other end is opened to form an opening 32. The filter member 22 is configured by winding a sheet-like filter layer 33 so that it can be rewound. The end 33 a of the filter layer 33 that is not fixed to the filter member 22 in the winding direction of the filter layer 33 is fixed to the rotor member 23. In the oil pan 21 (see FIG. 2), the filter member 22 and the rotor member 23 are provided in parallel to each other. When the rotor member 23 rotates by the operation described later, the filter layer 33 is wound around the rotor member 23 and the filter layer 33 is removed from the filter member 22.

  As shown in FIG. 2, in the oil pan 21, the filter member 22 has an opening 32 (see FIG. 3) communicating with the hole 26, and the end of the filter member 22 in which the opening 32 is formed and the oil pan 21. By providing a bearing (not shown) that can be sealed to prevent oil from going back and forth between the inner surface of the wall portion 21a, the filter member 22 is rotatably mounted around its axial direction.

  One end of the rotor member 23 protrudes to the outside of the oil pan 21 through a wall 21a of the oil pan 21 via a bearing (not shown) that can be sealed so that oil does not leak. A gear 34 is provided at this end, and this gear 34 is mechanically connected to a gear constituting the power transmission means 24.

Next, the operation of the rotating electrical machine cooling system according to the first embodiment will be described.
As shown in FIG. 1, when the rotating electrical machine 2 is started, the oil pump 8 is also started. The oil stored in the oil pan 21 is sucked into the oil pump 8 through the oil circulation pipe 25, and the oil discharged from the oil pump 8 passes through the oil circulation path 5 and the stator 41 of each of the generator 3 and the motor 4. And the oil which was supplied to the coils 43 and 53 wound around 51 and cooled the coils 43 and 53 is recovered again in the oil pan 21, and the oil circulates in the cooling system 1.

  As the coils 43 and 53 continue to be cooled, the oil temperature rises. When the temperature of the oil is high, the cooling effect of the coils 43 and 53 is deteriorated. Therefore, when the detected value by the oil temperature sensor 9 becomes equal to or higher than a predetermined value preset in the ECU 10, the ECU 10 switches the bypass valve 11 so that the oil discharged from the oil pump 8 passes through the oil cooler 13. Switch the flow. When the oil temperature sensor 9 confirms that the temperature of the oil has decreased to a temperature at which the cooling of the coils 43 and 53 is not affected by the cooling of the oil cooler 13, the ECU 10 switches the bypass valve 11 again to change the oil temperature. The oil discharged from the pump 8 is directly supplied to the coils 43 and 53.

  While the oil circulates in the cooling system 1, dust is mixed in the oil. The dust mixed in the oil is removed by the oil filter device 7, and the oil from which the dust is removed is sucked into the oil pump 8 and supplied to the coils 43 and 53. The operation of removing dust by the oil filter device 7 will be described in detail below.

  As shown in FIG. 2, the oil in the oil pan 21 enters the filter layer 33 from the outside of the filter member 22 and flows into the internal space 31. When oil passes through the filter layer 33, dust is removed mainly in the outermost layer of the filter layer 33, and oil not mixed with dust flows into the internal space 31. The removed dust is mainly deposited on the outermost layer of the filter layer 33. The oil that has flowed into the internal space 31 flows through the hole 26 through the oil distribution pipe 25 and is sucked into the oil pump 8.

  As dust accumulates on the outermost layer of the filter layer 33, the pressure loss between the outside of the filter member 22 and the internal space 31 increases, and the load of the oil pump 8 increases. If the accumulation of dust further increases, the amount of oil supplied to the oil pump 8 will eventually decrease, causing a failure of the oil pump 8 and poor cooling of the coils 43 and 53.

  However, in the first embodiment, the power of the oil pump 8 is decelerated by the power transmission means 24 and transmitted to the gear 34 (see FIG. 3), and the rotor member 23 rotates. Here, the number of rotations of the rotor member 23 is, for example, that all of the filter layer 33 wound around the filter member 22 is between the rotor member 23 and the periodical inspection of the vehicle using the rotating electrical machine 2 as a power source. It is preferable that the power transmission means 24 adjusts the rotation speed so as not to be wound around (referred to herein as “first rotation speed”). By rotating the rotor member 23 while the oil pump 8 is in operation, the outermost layer of the filter layer 33 is gradually wound around the rotor member 23 and automatically removed from the filter member 22. Even if dust accumulates on the outermost layer, the outermost layer of the filter layer 33 is always replaced with a new layer. That is, the outermost layer of the filter layer 33 on which dust is accumulated is automatically removed.

  In this way, the power of the oil pump 8 rotates the rotor member 23 so that the filter member 33 is wound around the filter member 22 so that the filter member 33 is wound around the filter member 22. Since the filter member 23 is automatically removed, the clogging of the filter member 23 can be automatically removed.

(Embodiment 2)
Next, a cooling system for a rotating electrical machine according to Embodiment 2 will be described. The cooling system for a rotating electrical machine according to the second embodiment is different from the first embodiment in that the outermost layer of the filter layer 33 is quickly wound around the rotor member 23 when the filter member 22 is suddenly clogged. It has been changed to be removed.

  As shown in FIG. 4, unlike the power transmission unit 24 of the first embodiment, the power transmission unit 64 winds the outermost layer of the filter layer 33 around the rotor member 23 at a first rotation speed and quickly, for example, in about several seconds. This is a transmission that transmits the power of the oil pump 8 to the rotor member 23 so as to be switchable to a rotation speed that can be taken (referred to as “second rotation speed” in this specification). The oil circulation pipe 25 is provided with an oil flow rate sensor 61 which is an oil flow rate detecting means for detecting the flow rate of oil sucked by the oil pump 8. The ECU 10 transmits power so as to switch the rotation speed of the rotor member 23 between the first rotation speed and the second rotation speed, and the predetermined value setting section 62 in which a predetermined value for the detection value by the oil flow sensor 61 is set. A rotation speed switching execution unit 63 for controlling the means 64; Within the ECU 10, the specified value setting unit 62 and the rotation speed switching execution unit 63 are electrically connected to each other. The oil flow rate sensor 61 and the power transmission means 64 are electrically connected to the rotation speed switching execution unit 63. Other configurations are the same as those of the first embodiment.

  The operation in which oil circulates in the cooling system 1, the operation in which the oil cooling mechanism 6 cools the oil, and the operation in which dust in the oil is removed by the filter member 22 are the same as those in the first embodiment. Further, the operation of winding the filter layer 33 by the rotation of the rotor member 23 at the first rotational speed is the same as that of the first embodiment.

  During operation of the oil pump 8, the oil flow sensor 61 detects the flow rate of oil sucked into the oil pump 8 and transmits a signal regarding the detected oil flow rate to the rotation speed switching execution unit 63. The rotation speed switching execution unit 63 determines whether or not the oil flow rate detected by the oil flow rate sensor 61 is equal to or greater than a specified value set in the specified value setting unit 62. If the clogging of the filter layer 33 becomes very large, the flow rate of the oil sucked into the oil pump 8 decreases. In this case, it is necessary to quickly remove the outermost layer of the filter layer 33 from the filter member 22. Therefore, when the oil flow rate detected by the oil flow sensor 61 falls below a specified value, the rotation speed switching execution unit 63 controls the power transmission means 64 to change the rotation speed of the rotor member 23 from the first rotation speed to the first rotation speed. Switch to 2 rpm. Then, the winding speed of the filter layer 33 by the rotor member 23 increases, and the outermost layer of the filter layer 33 is quickly removed from the filter member 22.

  When the outermost layer of the filter layer 33 is removed from the filter member 22, the rotation speed switching execution unit 63 controls the power transmission means 64 to switch the rotation speed of the rotor member 23 from the second rotation speed to the first rotation speed. . Thereafter, the above operation is repeated depending on the oil flow rate detected by the oil flow rate sensor 61.

  Thus, the clogging of the filter member 22 can be recognized from the decrease in the flow rate of the oil sucked by the oil pump 8, and when the clogging is recognized, the outermost layer of the filter layer 33 in which the clogging has occurred is quickly removed. Thus, the clogging of the filter member 22 can be automatically and quickly removed.

(Embodiment 3)
Next, a cooling system for a rotating electrical machine according to Embodiment 3 will be described. The cooling system for a rotating electrical machine according to the third embodiment causes the outermost layer of the filter layer 33 to be wound around the rotor member 23 and removed from the filter member 22 only when the filter member 22 is clogged with respect to the first embodiment. It has been changed to.

  As shown in FIG. 5, a clutch mechanism unit 70 is provided between the oil pump 8 and the power transmission means 24 to connect and disconnect the transmission of rotational power from the oil pump 8 to the rotor member 23. The oil circulation pipe 25 is provided with an oil flow rate sensor 61 which is an oil flow rate detecting means for detecting the flow rate of oil sucked by the oil pump 8. The ECU 10 includes a clutch mechanism unit so as to switch between a regulation value setting unit 62 in which a regulation value for the detection value by the oil flow sensor 61 is set and connection / disconnection of transmission of rotational power from the oil pump 8 to the rotor member 23. And a power transmission switching unit 71 for controlling 70. Within the ECU 10, the specified value setting unit 62 and the power transmission switching unit 71 are electrically connected to each other. The oil flow rate sensor 61 and the clutch mechanism unit 70 are electrically connected to the power transmission switching unit 71. Other configurations are the same as those of the first embodiment.

  The operation in which oil circulates in the cooling system 1, the operation in which the oil cooling mechanism 6 cools the oil, and the operation in which dust in the oil is removed by the filter member 22 are the same as those in the first embodiment.

  During operation of the oil pump 8, the oil flow sensor 61 detects the flow rate of oil sucked into the oil pump 8, and transmits a signal about the detected oil flow rate to the power transmission switching unit 71. The power transmission switching unit 71 determines whether or not the oil flow rate detected by the oil flow rate sensor 61 is equal to or greater than a specified value set in the specified value setting unit 62. If the clogging of the filter layer 33 becomes very large, the flow rate of the oil sucked into the oil pump 8 is reduced. In this case, it is necessary to remove the outermost layer of the filter layer 33 from the filter member 22. Therefore, when the oil flow rate detected by the oil flow sensor 61 falls below a specified value, the power transmission switching unit 71 connects the transmission of the rotational power from the oil pump 8 to the rotor member 23 by the clutch mechanism unit 70. The power transmission means 24 reduces the rotational power of the oil pump 8 to a rotational speed at which the outermost layer of the filter layer 33 can be wound around the rotor member 23 in, for example, about several seconds, and the rotor member 23 is rotated at this rotational speed. The outermost layer of the filter layer 33 is wound around the rotor member 23 by rotating. When the winding of the outermost layer of the filter layer 33 is finished, the power transmission switching unit 71 causes the clutch mechanism unit 70 to disconnect the transmission of the rotational power from the oil pump 8 to the rotor member 23. Thereafter, the above operation is repeated depending on the oil flow rate detected by the oil flow rate sensor 61.

  In this way, the filter layer 33 that is clogged can be removed only when the outermost layer of the filter layer 33 needs to be removed, so that the period of use of the filter member 22 can be extended.

(Embodiment 4)
Next, a cooling system for a rotating electrical machine according to a fourth embodiment will be described. The cooling system for a rotating electrical machine according to the fourth embodiment is a modification of the second or third embodiment so that the number of times the outermost layer of the filter layer 33 is wound around the rotor member 23 is displayed to the driver. It is. In the following, the fourth embodiment will be described in a form in which new configuration requirements are added to the configuration of the third embodiment. However, a new configuration requirement may be added to the configuration of the second embodiment to form the fourth embodiment.

  As shown in FIG. 6, the ECU 10 further includes a winding number measuring unit 81 that measures the number of times the outermost layer of the filter layer 33 is wound around the rotor member 23. In the ECU 10, the winding number measuring unit 81 is electrically connected to the power transmission switching unit 71. A display unit 80 for displaying the measured number of windings is electrically connected to the winding number measuring unit 81, and the display unit 80 is included in, for example, an instrument panel of a vehicle. Other configurations are the same as those of the third embodiment.

  An operation in which oil circulates in the cooling system 1, an operation in which the oil cooling mechanism 6 cools the oil, an operation in which dust in the oil is removed by the filter member 22, and an outermost layer of the filter layer 33 is wound around the rotor member 23. The actions taken are the same as in the third embodiment.

  Each time the clutch mechanism unit 70 connects transmission of rotational power from the oil pump 8 to the rotor member 23 and winds the outermost layer of the filter layer 33 around the rotor member 23, the winding number measuring unit 81 determines the number of windings. Add. When the winding number is added, the winding number measuring unit 81 displays the updated winding number on the display unit 80. The driver can determine whether or not the filter member 22 needs to be replaced based on the number of windings of the outermost layer of the filter layer 33 displayed on the display unit 80.

  When a new configuration requirement is added to the configuration of the second embodiment to form the fourth embodiment, the winding number measuring unit 81 is electrically connected in the ECU 10 to the rotation number switching execution unit 63 (see FIG. 4). The Every time the outermost layer of the filter layer 33 is wound around the rotor member 23, the winding number measuring unit 81 adds the winding number and displays the winding number on the display unit 80 as described above.

(Embodiment 5)
Next, a cooling system for a rotating electrical machine according to a fifth embodiment will be described. The cooling system for a rotating electrical machine according to the fifth embodiment notifies the driver of replacement of the filter member 22 based on the number of times the outermost layer of the filter layer 33 is wound around the rotor member 23 in the second or third embodiment. It has been changed to teach. Hereinafter, the fifth embodiment will be described in a form in which new configuration requirements are added to the configuration of the third embodiment. However, a new configuration requirement may be added to the configuration of the second embodiment to form the fifth embodiment.

  As shown in FIG. 7, the ECU 10 winds the outermost layer of the filter layer 33 around the rotor member 23 and the winding number measuring unit 81 that measures the number of times the outermost layer of the filter layer 33 is wound around the rotor member 23. Winding possible number setting unit 82 in which the number of windings that can be taken is set, and replacement of filter member electrically connected to winding number measuring unit 81 and winding number setting unit 82 And a determination unit 83. In the ECU 10, the winding number measuring unit 81 is electrically connected to the power transmission switching unit 71. The winding number measuring unit 81 is electrically connected to a display unit 90 that displays that the filter member 22 needs to be replaced. The display unit 90 is included in, for example, an instrument panel of a vehicle. Other configurations are the same as those of the third embodiment.

  The operation of circulating oil in the cooling system 1, the operation of cooling the oil by the oil cooling mechanism 6, the operation of removing dust in the oil by the filter member 22, and the outermost layer of the filter layer 33 to the rotor member 23 The winding operation is the same as that of the third embodiment. The operation of determining the necessity of replacement of the filter member 22 and informing the driver of the notification of replacement of the filter member 22, which is a feature of the fifth embodiment, will be described in detail below based on the flowchart of FIG.

  The winding number measuring unit 81 determines whether or not the outermost layer of the filter layer 33 has been wound around the rotor member 23 (step S1). If it has not been wound, return to the beginning. When wound up, the winding number measuring unit 81 adds the number of windings (step S2). Next, the filter member replacement determination unit 83 determines whether or not the added number of windings is equal to the number of windings possible (step S3). If they are not equal, return to the beginning. When both are equal, the filter member replacement determination unit 83 displays on the display unit 90 that the filter member 22 needs to be replaced (step S4). By displaying that the filter member 22 needs to be replaced on the display unit 90, the driver can easily recognize that the filter member needs to be replaced.

  When a new configuration requirement is added to the configuration of the second embodiment to form the fourth embodiment, the winding number measuring unit 81 is electrically connected in the ECU 10 to the rotation number switching execution unit 63 (see FIG. 4). The Even in this embodiment, the operations from step S1 to step S4 are the same as described above.

  In Embodiments 2 to 4, the portion corresponding to the outermost layer of the filter layer 33 is removed from the filter member 22, but this is not a limitation. In order to reliably remove the portion corresponding to the outermost layer of the filter layer 33, it may be removed slightly longer than the outermost layer of the filter layer 33, or depending on the size of the dust deposited on the filter layer 33, Since it is considered that the filter layer 33 passes through the outermost layer and penetrates to the layer below the outermost layer and further to the layer below the outermost layer, a portion corresponding to the layer below the outermost layer may be removed. Long ranges may be removed. That is, at least a portion corresponding to the outermost layer in the filter layer 33 may be removed.

DESCRIPTION OF SYMBOLS 1 Cooling system 2 Rotating electric machine 10 ECU (control part)
21 oil pan 21a (oil pan) wall 22 filter member 23 rotor member 24 power transmission means 33 filter layer 33a (filter layer) end 43 coil 53 coil 61 oil flow sensor (oil flow detection means)
62 Specified Value Setting Unit 63 Rotation Speed Switching Execution Unit 64 Power Transmission Means 70 Clutch Mechanism Unit 71 Power Transmission Switching Unit 80 Display Unit 81 Winding Count Measuring Unit 82 Winding Possible Count Setting Unit 83 Filter Member Replacement Determination Unit 90 Display Unit

Claims (6)

An oil pan for storing oil for cooling the coil of the rotating electrical machine;
An oil pump for supplying the oil stored in the oil pan to the coil;
A cylindrical filter member rotatably provided in the oil pan, wherein the sheet-like filter layer is wound so as to be rewound so that the oil passes through the filter layer; ,
A rotor member that is rotatably provided in the oil pan and has an end portion of the filter layer that is not fixed to the filter member with respect to a winding direction of the filter layer; and
Power transmission means for shifting the power of the oil pump and transmitting it to the rotor member;
A rotating electrical machine characterized in that the rotor member can wind up the filter layer wound around the filter member by rotating the rotor member by the power of the oil pump transmitted by the power transmission means. Cooling system.   2. The cooling system for a rotating electrical machine according to claim 1, wherein the rotor member always winds the filter layer at a first rotational speed. An oil flow rate detecting means for detecting a flow rate of oil sucked by the oil pump;
A control unit,
The controller is
A specified value setting unit in which a specified value for a detected value by the oil flow rate detecting means is set;
A rotation speed switching execution unit for controlling the power transmission means to switch the rotation speed of the rotor member between the first rotation speed and a second rotation speed larger than the first rotation speed;
When the detection value by the oil flow rate detection means falls below the specified value, the rotation speed switching execution unit switches the rotation speed of the rotor member from the first rotation speed to the second rotation speed, and the filter Of the filter layer wound around the member, at least a portion corresponding to the outermost layer is wound around the rotor member, and when at least a portion corresponding to the outermost layer is wound around the rotor member, the rotation speed switching execution unit 3. The cooling system for a rotating electrical machine according to claim 2, wherein the power transmission means switches the rotational speed of the rotor member from the second rotational speed to the first rotational speed. An oil flow rate detecting means for detecting a flow rate of oil sucked by the oil pump;
A clutch mechanism for connecting and disconnecting transmission of power from the oil pump to the rotor member, and a control unit;
The controller is
A specified value setting unit in which a specified value for a detected value by the oil flow rate detecting means is set;
A power transmission switching unit that switches connection and disconnection of power transmission from the oil pump to the rotor member by the clutch mechanism unit;
When the detected value by the oil flow rate detection means falls below the specified value, the power transmission switching unit connects the transmission of power from the oil pump to the rotor member by the clutch mechanism unit, and the power transmission The power of the oil pump is shifted by means to be transmitted to the rotor member, and at least a portion corresponding to the outermost layer of the filter layer wound around the filter member is wound on the rotor member, to the rotor member 2. The cooling system for a rotating electrical machine according to claim 1, wherein transmission of power from the oil pump to the rotor member is cut off by the clutch mechanism after the winding of the rotary is finished. The control unit further includes a winding number measuring unit that measures the number of times that the portion corresponding to at least the outermost layer of the filter layer wound around the filter member is wound around the rotor member,
The cooling system for a rotating electrical machine according to claim 3, wherein the cooling system for the rotating electrical machine further includes a display unit that displays the number of times. The controller is
A winding number measuring unit for measuring the number of times at least a portion corresponding to the outermost layer of the filter layer wound around the filter member is wound around the rotor member;
A winding possible number setting unit in which the number of windings that is the number of times that the rotor member can be wound around the portion corresponding to at least the outermost layer of the filter layer wound around the filter member;
A filter member replacement determination unit that determines whether or not replacement of the filter member is necessary from the number of times and the number of windings possible,
The cooling system of the rotating electrical machine further includes a display unit that displays a notification of replacement of the filter member when the filter member replacement determination unit determines that the number of times has reached the number of possible windings, The cooling system for a rotating electrical machine according to claim 3 or 4.

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