JP2005333747A - Cooling system and inverter-integrated rotating electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling system that can easily remove air in a cooling water conduit. <P>SOLUTION: A power control unit (PCU) 14 is installed to a motor generator 12 and connected to a filler 26 and a motor-cooling water jacket (W/J) 24 through cooling water hoses 28, 30, respectively. A conduction port 86 of the PCU 14 is located in a position higher than a conduction port 84 in the W/J 24, and the PCU is installed to the motor generator 12 so that a conduction port 88 is located in a position higher than the conduction port 86. The filler 26 having a cooling water injection port 32 at its upper part is arranged so that a conduction port 90 arranged at a lower part is located in a position higher than the conduction port 88 in the PCU 14. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cooling system and an inverter-integrated rotating electrical machine, and more particularly, to a rotating electrical machine, a cooling system for an inverter device that drives the rotating electrical machine, and an inverter-integrated rotating electrical machine that is cooled by the cooling system.

  BACKGROUND ART Hybrid vehicles and electric vehicles are attracting attention against the background of energy saving and environmental problems that are increasing in recent years. A hybrid vehicle is a vehicle that uses a DC power source, an inverter, and a motor driven by the inverter as a power source in addition to a conventional engine. That is, a power source is obtained by driving the engine, a DC voltage from a DC power source is converted into an AC voltage by an inverter, and a motor is rotated by the converted AC voltage to obtain a power source. An electric vehicle is a vehicle that uses a DC power source, an inverter, and a motor driven by the inverter as a power source.

  Conventionally, in such a hybrid vehicle or the like, the inverter and the motor are generally mounted on the vehicle separately as individual units. On the other hand, for cooling systems such as hybrid vehicles, the inverter and motor cooling system is shared by connecting the inverter and motor with a cooling water hose, etc., and the inverter with a smaller heat capacity than the motor is seen from the radiator. Is generally disposed upstream.

On the other hand, an inverter-integrated motor in which an inverter is installed on a motor is known as a motor mounted on the above-described hybrid vehicle or the like (see, for example, Patent Document 1). Such an inverter-integrated motor can simplify the cooling system and wiring system provided between the motor and the inverter, and thus is expected to be useful in hybrid vehicles and the like that are strongly required to be downsized and highly efficient. Has been.
Japanese Patent Laid-Open No. 10-257708

  In such a cooling system for a hybrid vehicle or the like, in order to prevent poor circulation of the cooling water for cooling the inverter and the motor and poor cooling of the inverter and the motor, the temperature of the air and the cooling water mixed when the cooling water is replaced is increased. It is necessary to remove the generated bubbles.

  Here, when the inverter and the motor are separately mounted on the vehicle as separate units, the cooling water hose for passing the cooling water between them is generally longer, so it was mixed when the cooling water was replaced. Bubbles generated by the temperature rise of the air or the cooling water can stay in the peak portion of the cooling water hose.

  To remove the air (air) accumulated in the cooling water hose, circulate the cooling water for a while and move the air to the place with the air vent hole, or to the place with the air vent hole due to the performance of the water pump. When the air cannot be moved, it is necessary to provide an air vent hole in a place where the air can stay. However, circulating the cooling water for air removal or performing air bleeding at each location where the air can stay reduces, for example, the above-described work efficiency at the time of cooling water exchange.

  Here, since the inverter integrated motor described above can shorten the cooling water hose in terms of configuration, it can be said that the inverter integrated motor has an effective configuration for solving the above problems. It is not possible to solve the above-mentioned problem simply by being integrated. Patent Document 1 described above discloses an inverter-integrated motor, but does not disclose any cooling system, and the above-described problem cannot be solved even by this inverter-integrated motor.

  Therefore, the present invention has been made to solve such a problem, and an object thereof is to provide a cooling system capable of easily removing air in the cooling water channel.

  Another object of the present invention is to provide an inverter-integrated rotating electrical machine that is cooled by a cooling system that can easily remove air in a cooling water channel.

  According to the present invention, the cooling system includes a rotating electrical machine, an inverter device that drives and controls the rotating electrical machine, a refrigerant tank having an inlet for cooling water, and a first cooling provided between the refrigerant tank and the inverter device. And a second cooling water passage provided between the water jacket and a water jacket portion provided in the inverter device and the rotating electrical machine, and the refrigerant tank includes a first flow outlet to which the first cooling water passage is connected. The inverter device includes a second flow port to which the first cooling water channel is connected and a third flow port to which the second cooling water channel is connected and provided at a position lower than the second flow port. The water jacket portion includes a fourth flow port to which the second cooling water channel is connected, and the inverter device has a third flow port that is more than the fourth flow port in the water jacket portion. Arranged to be high The refrigerant tank is disposed such that the first flow port is higher than the second flow port in the inverter device, and the first cooling water channel has the first flow port. And the second cooling water channel is lower than the third flow port, and the fourth flow channel is positioned higher than the second flow port. It arrange | positions so that it may become a position higher than a flow hole.

  Further, according to the present invention, the cooling system includes a rotating electrical machine, an inverter device that drives and controls the rotating electrical machine, a refrigerant tank having an inlet for cooling water, and a water jacket portion provided in the refrigerant tank and the rotating electrical machine. A first cooling water channel provided between the first cooling water channel and a second cooling water channel provided between the water jacket portion and the inverter device, and the refrigerant tank is connected to the first cooling water channel. The water jacket portion includes a second, and a third throughflow port to which the first cooling water channel is connected and a second cooling water channel to which the second cooling water channel is connected and provided at a position lower than the second throughflow port. The inverter device includes a fourth flow port to which the second cooling water channel is connected, and the inverter device has a fourth flow port in the water jacket portion. In a position lower than the mouth The refrigerant tank is disposed such that the first flow port is positioned higher than the second flow port in the water jacket portion, and the first cooling water channel is The second cooling water channel is disposed so as to be lower than the first flow port and higher than the second flow port, and the second cooling water channel is lower than the third flow port, And it arrange | positions so that it may become a position higher than a 4th through-flow port.

  According to the present invention, the cooling system includes a rotating electrical machine, an inverter device that drives and controls the rotating electrical machine, a refrigerant tank having an inlet for cooling water, and a first provided between the refrigerant tank and the inverter device. And a second cooling water channel provided between the refrigerant tank and a water jacket portion provided in the rotating electrical machine, the refrigerant tank being connected to the first and second cooling water channels, respectively. The inverter unit includes a third flow port to which the first cooling water channel is connected, and the water jacket portion includes a fourth flow channel to which the second cooling water channel is connected. The refrigerant tank includes a flow port, the first flow port is higher than the third flow port in the inverter device, and the second flow port is higher than the fourth flow port in the water jacket portion. Become high The first cooling water channel is arranged so that the route is lower than the first flow port and higher than the third flow port, and the second cooling water channel Is disposed such that its path is lower than the second flow port and higher than the fourth flow port.

  Preferably, the inverter device is disposed on the upstream side of the water jacket portion as viewed from the radiator that cools the cooling water.

  Preferably, the cooling water passage in the inverter device is laid so that air does not stay inside when the inverter device is disposed and cooling water is supplied to the inside.

  According to the present invention, the inverter-integrated rotating electrical machine includes a rotation drive unit, an inverter device that is installed on the outer peripheral surface of the rotation drive unit and controls the rotation drive unit, and a rotation drive unit that is provided on the outer peripheral surface. A water jacket portion, a refrigerant tank having an inlet for cooling water, a first cooling water passage provided between the refrigerant tank and the inverter device, and a second water heater provided between the inverter device and the water jacket portion. A cooling water channel, the refrigerant tank includes a first flow port to which the first cooling water channel is connected, and the inverter device includes a second flow port to which the first cooling water channel is connected; The second cooling water channel is connected to the second cooling water channel, and the water jacket portion is connected to the second cooling water channel. Including mouth and inverter Is installed on the outer peripheral surface so that the third through-flow port is higher than the fourth through-flow port in the water jacket portion, and the refrigerant tank has the first through-flow port in the inverter device. It arrange | positions so that it may become a position higher than a through-flow port, and the 1st cooling water channel is the position where the path | route is lower than a 1st through-flow port, and is higher than a 2nd through-flow port. The second cooling water channel is disposed such that the channel is lower than the third flow port and higher than the fourth flow port.

  According to the present invention, the inverter-integrated rotating electrical machine includes a rotation drive unit, an inverter device that is installed on the outer peripheral surface of the rotation drive unit and controls the rotation drive unit, and a rotation drive unit that is provided on the outer peripheral surface. A water jacket portion, a refrigerant tank having an inlet for cooling water, a first cooling water channel provided between the refrigerant tank and the water jacket portion, and a second provided between the water jacket portion and the inverter device. The coolant tank includes a first flow port to which the first cooling water channel is connected, and the water jacket portion includes a second flow port to which the first cooling water channel is connected. And the second cooling water channel is connected, and the third through-flow port is provided at a position lower than the second through-flow port. The inverter device includes a fourth flow channel to which the second cooling water channel is connected. Inlet including inflow The data device is installed on the outer peripheral surface so that the fourth through-flow port is lower than the third through-flow port in the water jacket portion, and the refrigerant tank has the first through-flow port in the water jacket portion. The first cooling water channel is lower than the first flow port and higher than the second flow port. The second cooling water channel is arranged so that the route is lower than the third flow port and higher than the fourth flow port.

  According to the present invention, the inverter-integrated rotating electrical machine includes a rotation drive unit, an inverter device that is installed on the outer peripheral surface of the rotation drive unit and controls the rotation drive unit, and a rotation drive unit that is provided on the outer peripheral surface. A water jacket portion, a refrigerant tank having an inlet for cooling water, a first cooling water passage provided between the refrigerant tank and the inverter device, and a second cooling water provided between the refrigerant tank and the water jacket portion. A cooling water channel, the refrigerant tank includes first and second flow ports to which the first and second cooling water channels are respectively connected, and the inverter device includes a third cooling water channel to which the first cooling water channel is connected. The water jacket portion includes a fourth flow port to which the second cooling water channel is connected, and the refrigerant tank includes a third flow port in the inverter device. Higher than In addition, the second through-flow port is disposed at a position higher than the fourth through-flow port in the water jacket portion, and the first cooling water channel has a path that is higher than the first through-flow port. The second cooling water channel is disposed so as to be lower and higher than the third flow port, and the second cooling water channel is lower than the second flow port, and the fourth flow port. It arrange | positions so that it may become a higher position.

  Preferably, the inverter device is disposed on the upstream side of the water jacket portion as viewed from the radiator that cools the cooling water.

  Preferably, the cooling water passage in the inverter device is laid so that air does not stay inside when the inverter device is installed on the outer peripheral surface and the cooling water is supplied to the inside.

  Preferably, the inverter-integrated rotating electrical machine further includes a water pump that is installed on the outer peripheral surface of the rotation drive unit and allows cooling water to flow through the refrigerant tank, the inverter device, and the water jacket unit.

  Preferably, the first and second cooling water channels are formed in the rotation drive unit.

  Preferably, the inverter device, the rotation drive unit, the refrigerant tank, and the water jacket unit are disposed in front of a vehicle on which these are mounted.

  In the cooling system and the inverter-integrated rotating electrical machine according to the present invention, the inverter device is disposed at a position higher than the water jacket portion provided in the rotating electrical machine, and the refrigerant tank having the cooling water inlet is more than the inverter device. It is arranged at a high position. Alternatively, the inverter device is disposed at a position lower than the water jacket portion, and the refrigerant tank is disposed at a position higher than the water jacket portion. Alternatively, a refrigerant tank is provided downstream of the inverter device and upstream of the water jacket portion, and the refrigerant tank is disposed at a position higher than the water jacket portion and the inverter device. For this reason, the air in the cooling water channel is collected in the uppermost refrigerant tank without staying in the middle.

  Therefore, according to this invention, the air in a cooling water channel can be removed easily. As a result, the work efficiency of the cooling water exchange work is improved, which contributes to the improvement of service. In addition, since air bubbles due to the temperature rise of the cooling water are easily removed, it is possible to prevent poor circulation of the cooling water and poor cooling of the inverter and the motor.

  Moreover, in the inverter-integrated rotating electrical machine according to the present invention, since it is disposed in front of the vehicle on which it is mounted, it sufficiently receives outside air during traveling.

  Therefore, according to the present invention, the cooling efficiency of the inverter-integrated rotating electrical machine is improved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

[Embodiment 1]
1 is a schematic diagram showing a configuration of a hybrid vehicle shown as an example of a vehicle equipped with a cooling system according to Embodiment 1 of the present invention. FIG. 1 shows a view of a hybrid vehicle as viewed from the front.

  Referring to FIG. 1, a hybrid vehicle 10 includes a motor generator 12, a power control unit (hereinafter referred to as “PCU”) 14, an engine 16, and a differential gear (hereinafter referred to as “DG”). 18), drive shaft 20, drive wheels 22R and 22L, water jacket (hereinafter referred to as "W / J") 24, filler 26, and cooling water hoses 28 and 30. Prepare. The filler 26 is provided with a cooling water inlet 32.

  Motor generator 12, PCU 14 and engine 16 are provided in an engine room in front of the vehicle. Motor generator 12 and engine 16 are arranged adjacent to each other in parallel to the ground. The PCU 14 is installed on the motor generator 12, and the motor generator 12 and the PCU 14 are integrally formed. A power output device including the motor generator 12 and the engine 16 is coupled to the DG 18.

  The motor generator 12 is a three-phase AC synchronous motor generator, and generates driving force by AC power received from the PCU 14. The motor generator 12 is also used as a generator when the hybrid vehicle 10 decelerates, generates AC power by the power generation action (regenerative power generation) during deceleration, and outputs the generated AC power to the PCU 14. The motor generator 12 is cooled by cooling water supplied into a W / J 24 described later.

  The PCU 14 controls the motor generator 12 by converting a DC voltage received from a battery (not shown) made of a secondary battery into an AC voltage. Further, the PCU 14 converts the AC voltage generated by the motor generator 12 into a DC voltage and charges the battery. The PCU 14 is connected to the cooling water hoses 28 and 30 and is cooled by the cooling water supplied from the cooling water hose 28. Then, the PCU 14 outputs the cooling water flowing from the cooling water hose 28 to the cooling water hose 30.

  The motor generator 12 and the engine 16 output the generated power to the DG 18 via a power take-off gear (not shown). Further, the motor generator 12 generates electric power by the rotational force of the drive wheels 22R and 22L, and outputs the generated electric power to the PCU 14. The motor generator 12 generates power using the power of the engine 16 and outputs the generated power to the PCU 14.

  The DG 18 transmits the power generated by the motor generator 12 and the engine 16 to the drive wheels 22R and 22L, and transmits the rotational force of the drive wheels 22R and 22L to the motor generator 12.

  W / J 24 is attached to the outer peripheral surface of motor generator 12. W / J 24 is connected to cooling water hose 30, and motor generator 12 is cooled by cooling water supplied from cooling water hose 30 to the inside. And W / J24 outputs the cooling water which flowed in from the cooling water hose 30 to the cooling water hose connected to the lower part.

  The filler 26 is a temporary tank of cooling water, and cooling water is injected from a cooling water inlet 32 provided on the filler 26. The filler 26 is connected to the cooling water hose 28 and outputs the cooling water flowing from the cooling water hose connected to the lower portion of the side surface to the cooling water hose 28.

  Cooling water hoses 28 and 30 flow cooling water for cooling motor generator 12 and PCU 14. The cooling water hose 28 is provided between the filler 26 and the PCU 14, and the cooling water hose 30 is provided between the PCU 14 and the W / J 24.

  Although not shown, the cooling water hose connected to the lower part of the W / J 24 and the cooling water hose connected to the lower part of the side surface of the filler 26 are connected via a radiator, and the cooling water cooled by the radiator. Circulates in the order of filler 26, PCU 14, W / J 24.

  Motor generator 12 constitutes a “rotating electric machine”, PCU 14 constitutes an “inverter device”, and motor generator 12 and PCU 14 constitute an “inverter-integrated rotating electric machine”. The filler 26 constitutes a “refrigerant tank”, and the cooling water hoses 28 and 30 constitute a “cooling water channel”.

  FIG. 2 is a circuit diagram showing a configuration of a main part of PCU 14 shown in FIG.

  Referring to FIG. 2, PCU 14 includes a converter 50, an inverter 52, a control device 54, capacitors C1 and C2, power supply lines PL1 to PL3, and output lines 72 to 76. Converter 50 is connected between battery B and inverter 52, and inverter 52 is connected to motor generator 12 via output lines 72 to 76.

  Battery B connected to converter 50 is, for example, a secondary battery such as nickel metal hydride or lithium ion. Battery B supplies the generated DC voltage to converter 50 and is charged by the DC voltage received from converter 50.

  Converter 50 includes power transistors Q1 and Q2, diodes D1 and D2, and a reactor L. Power transistors Q1 and Q2 are connected in series between power supply lines PL2 and PL3, and receive a control signal from control device 54 as a base. Diodes D1 and D2 are connected between the collector and emitter of power transistors Q1 and Q2, respectively, so that current flows from the emitter side to the collector side of power transistors Q1 and Q2. Reactor L has one end connected to power supply line PL1 connected to the positive electrode of battery B, and the other end connected to the connection point of power transistors Q1 and Q2.

  Converter 50 boosts the DC voltage received from battery B using reactor L, and supplies the boosted voltage to power supply line PL2. Converter 50 steps down the DC voltage received from inverter 52 to charge battery B.

  Inverter 52 includes U-phase arm 62, V-phase arm 64, and W-phase arm 66. Each phase arm is connected in parallel between power supply lines PL2 and PL3. U-phase arm 62 is composed of power transistors Q3 and Q4 connected in series, V-phase arm 64 is composed of power transistors Q5 and Q6 connected in series, and W-phase arm 66 is a power connected in series. It consists of transistors Q7 and Q8. Diodes D3 to D8 are respectively connected between the collector and emitter of power transistors Q3 to Q8 so that current flows from the emitter side to the collector side of power transistors Q3 to Q8. A connection point of each power transistor in each phase arm is connected to an anti-neutral point side of each phase coil of motor generator 12 via output lines 72 to 76.

  Inverter 52 converts a DC voltage received from power supply line PL <b> 2 into an AC voltage based on a control signal from control device 54, and outputs the AC voltage to motor generator 12. Inverter 52 rectifies the AC voltage generated by motor generator 12 into a DC voltage and supplies it to power supply line PL2.

  Capacitor C1 is connected between power supply lines PL1 and PL3, and smoothes the voltage level of power supply line PL1. Capacitor C2 is connected between power supply lines PL2 and PL3, and smoothes the voltage level of power supply line PL2.

  Control device 54 calculates each phase coil voltage of motor generator 12 based on the motor torque command value, each phase current value of motor generator 12, and the input voltage of inverter 52, and power transistors Q3 to Q3 based on the calculation result. A PWM (Pulse Width Modulation) signal for turning on / off Q8 is generated and output to inverter 52.

  The control device 54 calculates the duty ratio of the power transistors Q1 and Q2 for optimizing the input voltage of the inverter 52 based on the motor torque command value and the motor rotational speed described above, and the power based on the calculation result. A PWM signal for turning on / off the transistors Q1 and Q2 is generated and output to the converter 50.

  Further, control device 54 controls the switching operation of power transistors Q <b> 1 to Q <b> 8 in converter 50 and inverter 52 in order to charge battery B by converting AC power generated by motor generator 12 to DC power.

  In PCU 14, converter 50 boosts a DC voltage received from battery B based on a control signal from control device 54, and supplies the boosted voltage to power supply line PL2. Inverter 52 receives the DC voltage smoothed by capacitor C <b> 2 from power supply line PL <b> 2, converts the received DC voltage into an AC voltage, and outputs it to motor generator 12.

  Inverter 52 converts the AC voltage generated by the regenerative operation of motor generator 12 into a DC voltage and outputs it to power supply line PL2. Converter 50 receives the DC voltage smoothed by capacitor C2 from power supply line PL2, and steps down the received DC voltage to charge battery B.

  The power transistors Q1 to Q8, the diodes D1 to D8, the capacitors C1 and C2, and the motor generator 12 described above need to be sufficiently cooled to maintain their performance. Cooled by. Below, the structure of the cooling system which cools this PCU14 and the motor generator 12 is demonstrated in detail.

  FIG. 3 is a view of motor generator 12 shown in FIG. 1 as viewed from the direction of the rotation axis.

  Referring to FIG. 3, the cooling water is caused to flow by a water pump (not shown) in the order of filler 26, cooling water hose 28, PCU 14, cooling water hose 30, and W / J 24. Then, the cooling water is output from a through-flow port 82 provided in the lower part of the W / J 24 and is circulated to the through-flow port 92 of the filler 26 via a radiator and a water pump (not shown).

  Here, the W / J 24 is attached to the outer peripheral surface of the motor generator 12 so that the coolant flow port 84 is higher than the flow port 82. Further, the PCU 14 is provided on the outer peripheral surface of the motor generator 12 so that the flow port 86 is positioned higher than the flow port 84 in the W / J 24 and the flow port 88 is positioned higher than the flow port 86. It is installed. Further, the filler 26 is disposed such that the flow port 90 provided in the lower portion is positioned higher than the flow port 88 in the PCU 14. Furthermore, the cooling water hoses 28 and 30 do not have a peak portion or a valley portion that retains air in the water channel.

  That is, in this cooling system, W / J 24, PCU 14 and filler 26 are arranged in the z-axis direction so that air does not stay in the cooling water channel and the air in the cooling water channel easily reaches the filler 26. The installation position is restricted as described above. More specifically, in this cooling system, the positional relationship in the z-axis direction of the cooling water flow ports in each of W / J 24, PCU 14 and filler 26 is regulated as described above, and then W / J 24, PCU 14 and Each device of the filler 26 is disposed.

  FIG. 4 is a configuration diagram of a cooling water channel in the PCU 14 shown in FIG.

  Referring to FIG. 4, the cooling water channel 94 in the PCU 14 has a configuration that does not have a vertical peak or valley. Therefore, as long as the PCU 14 maintains the vertical relationship as shown in the drawing when installed on the motor generator 12, air does not stay inside.

  As described above, in this cooling system, air does not stay in the cooling water channel, and the air in the cooling water channel is collected in the filler 26 at the uppermost position. It is not necessary to circulate the cooling water in order to remove the air staying inside. Further, it is not necessary to provide a hole for removing air other than the cooling water inlet 32 of the filler 26.

[Variation 1 of Embodiment 1]
FIG. 5 is a diagram showing a configuration of a cooling system according to Modification 1 of Embodiment 1 of the present invention. FIG. 5 shows a view when the motor generator 12 is viewed from the direction of the rotation axis, corresponding to FIG. 3 described above.

  Referring to FIG. 5, this cooling system has a configuration in which the arrangement positions of PCU 14 and W / J 24 are interchanged with each other in the configuration of the cooling system according to the first embodiment shown in FIG.

  In the cooling system according to the first modification of the first embodiment, the cooling water is made to flow by a water pump (not shown) in the order of the PCU 14, the cooling water hose 104, the W / J 24, the cooling water hose 102, and the filler 26. Then, the cooling water is output from the flow port 92 in the filler 26 and circulated to the flow port 82 in the PCU 14 via a radiator and a water pump (not shown).

  Here, the PCU 14 is installed on the outer peripheral surface of the motor generator 12 so that the coolant flow port 84 is positioned higher than the flow port 82. Further, W / J 24 is provided on the outer peripheral surface of motor generator 12 such that flow port 86 is higher than flow port 84 in PCU 14 and flow port 88 is higher than flow port 86. Installed. Furthermore, the filler 26 is arrange | positioned so that the through-flow port 90 may become a position higher than the through-flow port 88 in W / J24. Furthermore, the cooling water hoses 102 and 104 do not have a peak portion or a valley portion that retains air in the water channel.

  That is, also in this cooling system, the cooling water flow in each of the PCU 14, W / J 24 and the filler 26 is performed so that air does not stay in the cooling water channel and the air in the cooling water channel easily reaches the filler 26. After the positional relationship of the flow port in the z-axis direction is regulated as described above, the W / J 24, the PCU 14, and the filler 26 are disposed.

[Modification 2 of Embodiment 1]
FIG. 6 is a diagram showing a configuration of the cooling system according to the second modification of the first embodiment of the present invention. FIG. 6 shows a view of the motor generator 12 viewed from the direction of the rotation axis, corresponding to FIG. 3 described above.

  Referring to FIG. 6, this cooling system has a configuration in which PCU 14 and W / J 24 are arranged on different side surfaces of motor generator 12.

  In the cooling system according to the second modification of the first embodiment, the cooling water is caused to flow by a water pump (not shown) in the order of the PCU 14, the cooling water hose 106, the filler 26, the cooling water hose 108, and W / J 24. Then, the cooling water is output from the flow port 82 in the W / J 24 and is circulated to the flow port 86 in the PCU 14 via a radiator and a water pump (not shown).

  Here, the filler 26 is disposed such that the flow port 90 provided in the lower portion thereof is positioned higher than the flow port 88 in the PCU 14. Moreover, the filler 26 is arrange | positioned so that the through-flow port 92 may become a position higher than the through-flow port 84 in W / J24. Furthermore, the cooling water channels 106 and 108 do not have a peak portion or a valley portion that causes air to stay in the water channel.

  That is, also in this cooling system, each of the cooling water inlets in each of the PCU 14 and the filler 26 is configured so that the air does not stay in the cooling water channel and the air in the cooling water channel easily reaches the filler 26. The positional relationship in the z-axis direction of the cooling water flow port in the z-axis direction and the positional relationship in the z-axis direction of the cooling water flow port in each of the W / J 24 and the filler 26 are restricted as described above, and then W / J 24 The PCU 14 and the filler 26 are disposed.

[Modification 3 of Embodiment 1]
FIG. 7 is a diagram showing a configuration of the cooling system according to the third modification of the first embodiment of the present invention. FIG. 7 shows a view when the motor generator 12 is viewed from the direction of the rotation axis, corresponding to FIG. 3 described above.

  Referring to FIG. 7, this cooling system further includes a water pump 110 installed on motor generator 12 in the configuration of the cooling system according to the first embodiment shown in FIG. 3.

  The water pump 110 is a pump for circulating the cooling water in the cooling water passage in the cooling system, and is provided between the filler 26 and the PCU 14. The water pump 110 is connected to the filler 26 by a cooling water hose 112 and is connected to the PCU 14 by a cooling water hose 114. Then, the water pump 110 causes the cooling water to flow in the order of the cooling water hose 114, the PCU 14, the cooling water hose 30, the W / J 24, the filler 26, and the cooling water hose 112. The W / J 24 and the filler 26 are connected by a cooling water hose (not shown) via a radiator (not shown).

  Here, in the water pump 110, the motor generator 12 is configured such that the coolant outlet 118 is higher than the outlet 88 in the PCU 14 and the coolant inlet 116 is higher than the outlet 118. It is installed on the outer peripheral surface. Further, the filler 26 is disposed so that the flow inlet 90 is positioned higher than the inlet 116 in the water pump 110.

  That is, also in this cooling system, each of the W / J 24, the PCU 14, the water pump 110, and the filler 26 is configured so that air does not stay in the cooling water channel and the air in the cooling water channel easily reaches the filler 26. In addition, the positional relationship in the z-axis direction of the cooling water flow port is restricted as described above, and the W / J 24, the PCU 14, the water pump 110, and the filler 26 are disposed.

  In the cooling system according to the third modification of the first embodiment, the PCU 14 is integrated with the motor generator 12, and the water pump 110 is also installed on the motor generator 12, so that the entire cooling system is integrated more compactly. A cooling system with excellent mountability is constructed.

  As described above, according to the first embodiment and the first to third modifications thereof, the position of the cooling water inlet in each of W / J 24, PCU 14 and filler 26 (and water pump 110) in the z-axis direction. Since the relationship is restricted to the predetermined relationship described above, the air in the cooling water channel is collected in the uppermost filler 26 without staying in the middle. Therefore, the air in the cooling water channel can be easily removed.

  Moreover, since the motor generator 12 and the PCU 14 installed on the motor generator 12 are mounted in an engine room located in front of the hybrid vehicle 10, the outside air can be sufficiently received during traveling. Therefore, the cooling efficiency of motor generator 12 and PCU 14 is improved.

[Embodiment 2]
FIG. 8 is a diagram showing a configuration of a cooling system according to Embodiment 2 of the present invention. FIG. 8 shows a view when the motor generator is viewed from the direction of the rotation axis, corresponding to FIG. 3 described above.

  Referring to FIG. 8, the cooling system according to the second embodiment includes cooling water passages 122 and 124 in place of cooling water hoses 28 and 30 in the configuration of the cooling system according to the first embodiment shown in FIG. The filler 26 is installed on the outer peripheral surface of the motor generator 12.

  The cooling water channel 122 is provided inside the motor generator 12 and between the flow port 90 in the filler 26 and the flow port 88 in the PCU 14. The cooling water channel 124 is provided inside the motor generator 12 and between the flow port 86 in the PCU 14 and the flow port 84 in the W / J 24.

  In the cooling system according to the second embodiment, the PCU 14 is installed on the motor generator 12, and the filler 26 is also installed on the motor generator 12, so that the cooling water passage 122 is provided inside the motor generator 12 without using the cooling water hose. , 124 can be formed.

  As described above, according to the second embodiment, damage to the cooling water channel due to deterioration of the cooling water hose, which is a concern when using the cooling water hose, is prevented.

  Further, by installing the filler 26 together with the PCU 14 on the motor generator 12, the entire cooling system is integrated more compactly, and a cooling system with excellent mountability is constructed.

  In the second embodiment, the case where the cooling water channel is formed in the motor generator 12 corresponding to the first embodiment shown in FIG. 3 has been described. 3, a cooling water channel may be formed in the motor generator 12.

  Further, in each of the above embodiments, the case of the hybrid vehicle 10 is representatively described as a vehicle on which the cooling system and the inverter-integrated rotating electrical machine according to the present invention are mounted. However, the scope of the present invention is as follows. The present invention is not limited to hybrid vehicles, and can be applied to other vehicle systems such as electric vehicles and trains.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and is intended to include meanings equivalent to the scope of claims for patent and all modifications within the scope.

1 is a schematic diagram showing a configuration of a hybrid vehicle shown as an example of a vehicle equipped with a cooling system according to Embodiment 1 of the present invention. It is a circuit diagram which shows the structure of the principal part of PCU shown in FIG. It is the figure which looked at the motor generator shown in FIG. 1 from the rotating shaft direction. It is a block diagram of the cooling water channel in PCU shown in FIG. It is a figure which shows the structure of the cooling system by the modification 1 of Embodiment 1 of this invention. It is a figure which shows the structure of the cooling system by the modification 2 of Embodiment 1 of this invention. It is a figure which shows the structure of the cooling system by the modification 3 of Embodiment 1 of this invention. It is a figure which shows the structure of the cooling system by Embodiment 2 of this invention.

Explanation of symbols

  10 hybrid vehicle, 12 motor generator, 14 PCU, 16 engine, 18 DG, 20 drive shaft, 22R, 22L drive wheel, 24 W / J, 26 filler, 28, 30, 102, 104, 106, 108, 112, 114 Cooling water hose, 32 Cooling water inlet, 50 Converter, 52 Inverter, 54 Controller, 62 U-phase arm, 64 V-phase arm, 66 W-phase arm, 72-76 output line, 82-92 outlet, 94, 122,124 Cooling water channel, 110 water pump, 116 inlet, 118 outlet, B battery, C1, C2 capacitor, PL1-PL3 power line, Q1-Q8 power transistor, D1-D8 diode, L reactor.

Claims (13)

Rotating electrical machinery,
An inverter device for driving and controlling the rotating electrical machine;
A refrigerant tank having an inlet for cooling water;
A first cooling water channel provided between the refrigerant tank and the inverter device;
A second cooling water channel provided between the inverter device and a water jacket portion provided in the rotating electrical machine,
The refrigerant tank includes a first flow port to which the first cooling water channel is connected,
The inverter device is
A second flow outlet to which the first cooling water channel is connected;
A third through-flow port connected to the second cooling water channel and provided at a position lower than the second through-flow port;
The water jacket portion includes a fourth flow outlet to which the second cooling water channel is connected,
The inverter device is disposed such that the third flow port is positioned higher than the fourth flow port in the water jacket portion,
The refrigerant tank is disposed so that the first flow port is higher than the second flow port in the inverter device,
The first cooling water channel is disposed so that the channel is lower than the first flow port and higher than the second flow port.
The cooling system, wherein the second cooling water channel is disposed such that the channel is lower than the third flow port and higher than the fourth flow port. Rotating electrical machinery,
An inverter device for driving and controlling the rotating electrical machine;
A refrigerant tank having an inlet for cooling water;
A first cooling water channel provided between the refrigerant tank and a water jacket provided in the rotating electrical machine;
A second cooling water channel provided between the water jacket portion and the inverter device,
The refrigerant tank includes a first flow port to which the first cooling water channel is connected,
The water jacket part is
A second flow outlet to which the first cooling water channel is connected;
A third through-flow port connected to the second cooling water channel and provided at a position lower than the second through-flow port;
The inverter device includes a fourth flow outlet to which the second cooling water channel is connected,
The inverter device is disposed so that the fourth flow port is located at a position lower than the third flow port in the water jacket portion,
The refrigerant tank is disposed such that the first flow port is higher than the second flow port in the water jacket portion,
The first cooling water channel is disposed so that the channel is lower than the first flow port and higher than the second flow port.
The cooling system, wherein the second cooling water channel is disposed such that the channel is lower than the third flow port and higher than the fourth flow port. Rotating electrical machinery,
An inverter device for driving and controlling the rotating electrical machine;
A refrigerant tank having an inlet for cooling water;
A first cooling water channel provided between the refrigerant tank and the inverter device;
A second cooling water channel provided between the refrigerant tank and a water jacket portion provided in the rotating electrical machine,
The refrigerant tank includes first and second flow openings to which the first and second cooling water channels are connected, respectively.
The inverter device includes a third flow port to which the first cooling water channel is connected,
The water jacket portion includes a fourth flow outlet to which the second cooling water channel is connected,
In the refrigerant tank, the first flow port is higher than the third flow port in the inverter device, and the second flow port is the fourth flow port in the water jacket portion. Arranged to be higher than
The first cooling water channel is disposed so that the channel is lower than the first flow port and higher than the third flow port,
The cooling system, wherein the second cooling water channel is disposed so that the channel is lower than the second flow port and higher than the fourth flow port.   The cooling system according to any one of claims 1 to 3, wherein the inverter device is disposed upstream of the water jacket portion as viewed from a radiator that cools the cooling water.   The cooling water passage in the inverter device is laid so that air does not stay inside when the inverter device is disposed and the cooling water is supplied to the inside. 2. The cooling system according to item 1. A rotation drive unit;
An inverter device installed on an outer peripheral surface of the rotation drive unit and drivingly controlling the rotation drive unit;
Provided on the outer peripheral surface, a water jacket portion of the rotation drive unit;
A refrigerant tank having an inlet for cooling water;
A first cooling water channel provided between the refrigerant tank and the inverter device;
A second cooling water channel provided between the inverter device and the water jacket portion,
The refrigerant tank includes a first flow port to which the first cooling water channel is connected,
The inverter device is
A second flow outlet to which the first cooling water channel is connected;
A third through-flow port connected to the second cooling water channel and provided at a position lower than the second through-flow port;
The water jacket portion includes a fourth flow outlet to which the second cooling water channel is connected,
The inverter device is installed on the outer peripheral surface so that the third flow port is higher than the fourth flow port in the water jacket portion,
The refrigerant tank is disposed so that the first flow port is higher than the second flow port in the inverter device,
The first cooling water channel is disposed so that the channel is lower than the first flow port and higher than the second flow port.
The second cooling water channel is an inverter-integrated dynamoelectric machine that is disposed so that the channel is lower than the third flow port and higher than the fourth flow port. A rotation drive unit;
An inverter device installed on an outer peripheral surface of the rotation drive unit and drivingly controlling the rotation drive unit;
Provided on the outer peripheral surface, a water jacket portion of the rotation drive unit;
A refrigerant tank having an inlet for cooling water;
A first cooling water channel provided between the refrigerant tank and the water jacket portion;
A second cooling water channel provided between the water jacket portion and the inverter device,
The refrigerant tank includes a first flow port to which the first cooling water channel is connected,
The water jacket part is
A second flow outlet to which the first cooling water channel is connected;
A third through-flow port connected to the second cooling water channel and provided at a position lower than the second through-flow port;
The inverter device includes a fourth flow outlet to which the second cooling water channel is connected,
The inverter device is installed on the outer peripheral surface so that the fourth flow port is located at a position lower than the third flow port in the water jacket portion,
The refrigerant tank is disposed such that the first flow port is higher than the second flow port in the water jacket portion,
The first cooling water channel is disposed so that the channel is lower than the first flow port and higher than the second flow port.
The second cooling water passage is an inverter-integrated dynamoelectric machine that is disposed so that the passage is lower than the third flow passage and higher than the fourth flow passage. A rotation drive unit;
An inverter device installed on an outer peripheral surface of the rotation drive unit and drivingly controlling the rotation drive unit;
Provided on the outer peripheral surface, a water jacket portion of the rotation drive unit;
A refrigerant tank having an inlet for cooling water;
A first cooling water channel provided between the refrigerant tank and the inverter device;
A second cooling water channel provided between the refrigerant tank and the water jacket portion,
The refrigerant tank includes first and second flow openings to which the first and second cooling water channels are connected, respectively.
The inverter device includes a third flow port to which the first cooling water channel is connected,
The water jacket portion includes a fourth flow outlet to which the second cooling water channel is connected,
In the refrigerant tank, the first flow port is higher than the third flow port in the inverter device, and the second flow port is the fourth flow port in the water jacket portion. Arranged to be higher than
The first cooling water channel is disposed so that the channel is lower than the first flow port and higher than the third flow port,
The inverter-integrated rotating electrical machine, wherein the second cooling water channel is disposed such that the channel is lower than the second flow port and higher than the fourth flow port.   The inverter-integrated dynamoelectric machine according to any one of claims 6 to 8, wherein the inverter device is disposed upstream of the water jacket portion as viewed from a radiator that cools the cooling water.   The cooling water passage in the inverter device is laid so that air does not stay inside when the inverter device is installed on the outer peripheral surface and the cooling water is supplied to the inside. The inverter-integrated rotating electrical machine according to any one of the above.   11. The water pump according to claim 6, further comprising a water pump that is installed on an outer peripheral surface of the rotation driving unit and causes the cooling water to flow through the refrigerant tank, the inverter device, and the water jacket unit. The inverter-integrated rotating electrical machine described.   The inverter-integrated dynamoelectric machine according to any one of claims 6 to 11, wherein the first and second cooling water channels are formed in the rotation drive unit.   The inverter according to any one of claims 6 to 12, wherein the inverter device, the rotation drive unit, the refrigerant tank, and the water jacket unit are disposed in front of a vehicle on which the inverter device, the rotation drive unit, the refrigerant tank, and the water jacket unit are mounted. Body type rotating electrical machine.

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