JP6997245B2 - Rotary machine drive unit - Google Patents

Description

The present invention relates to a rotary electric machine drive unit.

Conventionally, in a hybrid vehicle, an electric vehicle, or the like, a technique for arranging a PCU (power control unit) for controlling the rotary electric machine is disclosed above the rotary electric machine (see, for example, Patent Document 1). An air layer is usually provided between the PCU and the rotary electric machine in order to prevent the parts constituting the PCU from being damaged by the heat generated by the rotary electric machine.

Japanese Unexamined Patent Publication No. 2016-140198

However, the device has become large due to the provision of an air layer between the PCU and the motor. For the purpose of downsizing the equipment, for example, it is conceivable to directly attach the PCU parts to the motor case that houses the rotary electric machine, but in this case, it is necessary to carry the motor case into the clean room where the PCU parts are assembled and to assemble it. , Assembly cost and transportation cost are high.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a rotary electric machine drive unit that is smaller and cheaper than the conventional one.

(1) The rotary electric machine drive unit according to the present invention (for example, the rotary electric machine drive unit 1, 2, 3, 4 described later) is a rotary electric machine drive unit mounted on a vehicle, and is a first rotary shaft (for example, for example). A first rotary electric machine (for example, a drive motor 10 described later) having a first rotary shaft 10a described later and a second rotary shaft parallel to the first rotary shaft (for example, a second rotary shaft 11a described later). A second rotary electric machine (for example, a power generation motor 11 described later), the first rotary electric machine, and the second rotary electric machine are accommodated, and an opening (for example, an opening (for example) on the side of the first rotary shaft and the second rotary shaft. For example, a housing having an opening 12a) described later (for example, a housing 12 described later), a lid member arranged in the opening (for example, a lid member 13 described later), the first rotation shaft, and the second rotation shaft. It is attached to the outside of the lid member so as to be arranged at a position overlapping the first rotary electric machine and the second rotary electric machine when viewed in the direction of the rotary axis, and at least of the first rotary electric machine and the second rotary electric machine. A power conversion device (for example, PCU15, 15A, 15B, 15C described later) for controlling one of them is provided.

According to the rotary electric drive unit of (1), the lid member of the housing and the PCU case accommodating the power conversion device are integrated, and the power conversion device is directly arranged on the lid member covering the opening of the housing. Therefore, since a separate air layer is not provided between the power conversion device and the first rotary electric machine and the second rotary electric machine, the rotary electric machine drive unit can be made smaller while suppressing the thickness of the power conversion device in the direction of the rotation axis. Can be converted.

(2) In the rotary electric machine drive unit of (1), the power conversion device has a semiconductor module (for example, power modules 150, 150A, 150B, 150C described later), and the semiconductor module is the first rotary shaft. And, when viewed in the direction of the second rotating shaft, it may be arranged at a position where it overlaps with the first rotating electric machine and the second rotating electric machine.

According to the rotary electric machine drive unit (2), the semiconductor module, which is a rigid member, is arranged at a position where it overlaps with the first rotary electric machine and the second rotary electric machine when viewed in the direction of the first rotary shaft and the second rotary shaft. Therefore, the vibration generated in the motor case and the transmission case can be suppressed more reliably.

(3) In the rotary electric machine drive unit of (1) or (2), the rotary electric machine drive unit further includes a cooler (for example, a water jacket 155 described later) for cooling the power conversion device, and the cooler is provided. , The first rotating shaft and the second rotating shaft may be arranged at a position overlapping with the first rotating electric machine and the second rotating electric machine when viewed in the direction of the second rotating shaft.

According to the rotary electric machine drive unit of (3), the cooler which is a rigid member is arranged at a position where it overlaps with the first rotary electric machine and the second rotary electric machine when viewed in the direction of the first rotary shaft and the second rotary shaft. Therefore, the vibration generated in the motor case and the transmission case can be suppressed more reliably. In particular, since a highly rigid cooler can be arranged at the attachment point of the first rotary electric machine and the second rotary electric machine to the housing, deformation due to vibration can be suppressed.

(4) In any of the rotary electric machine drive units (1) to (3), the power converter has a DC / DC converter (for example, a DC / DC converter 151 described later), and the DC / DC converter is a DC / DC converter. , The position of the intermediate portion in the vertical direction may be upward as compared with the whole of the power conversion device.

According to the rotary electric machine drive unit of (4), the position of the intermediate portion in the vertical direction of the DC / DC converter is higher than that of the entire power converter. That is, since the DC / DC converter is arranged above the power converter, the connection path with the low voltage system such as the low voltage battery (12V battery) connected from above can be shortened. Further, even if the inside of the engine room is flooded, it is possible to prevent the DC / DC converter from being submerged.

(5) In any of the rotary electric machine drive units (1) to (4), the power conversion device has an input unit from a power source (for example, a DC connector 152 described later), and the input unit is the power source. It may be placed above the converter.

According to the rotary electric machine drive unit of (5), since the input unit is arranged above the power conversion device, the first rotary electric machine, the second rotary electric machine, the gear, and the power conversion device are assembled in the engine room. After that, you can connect the DC cable. Therefore, the assemblability at the time of manufacturing the rotary electric machine drive unit can be improved.

(6) In any of the rotary electric machine drive units (1) to (5), the power conversion device is a component (for example, a power module 150, a DC / DC converter 151, DC described later) constituting the power conversion device. The connector 152, the reactor 153, and the capacitor 154) may be arranged in one layer so as to be arranged in a plane perpendicular to the direction of the first rotation axis and the second rotation axis.

According to the rotary electric machine drive unit of (6), each component constituting the power conversion device is arranged in one layer so as to be arranged in a plane perpendicular to the direction of the first rotation axis and the second rotation axis. It is possible to prevent the conversion device from increasing in thickness in the directions of the first rotation axis and the second rotation axis. In addition, the electric arrangement and the cooling circuit can be simplified, and the rotary electric drive unit can be downsized. Furthermore, since the power conversion device is arranged in one layer, it is possible to reduce the size of each part of the power conversion device in the height direction according to the evolution of technology, and it is possible to proceed with the same cooling circuit and electricity. Since wiring can be utilized, high communality can be ensured and development manpower can be reduced.

(7) In the rotary electric machine drive unit of (1) to (6), a power storage device (for example, a 12V battery 90 described later) arranged on the upper surface of the housing may be further provided.

Conventionally, the power conversion device is arranged on the upper surface of the housing, whereas in the present invention, the power conversion device is arranged on the side surface of the housing. Therefore, according to the rotary electric machine drive unit (7), since the power storage device such as a low voltage battery (12V battery) is arranged on the upper surface of the housing, the connection path with the DC / DC converter can be further shortened.

(8) In the rotary electric machine drive unit of (1) to (7), the first rotary electric machine is a drive rotary electric machine (for example, a drive motor 10 described later), and the second rotary electric machine is for electric power generation. It is a rotary electric machine (for example, a power generation motor 11 described later), and the power conversion device includes a DC / DC converter (for example, a DC / DC converter 151 described later) and a reactor (for example, as components constituting the power conversion device). , A reactor 153 described later), a capacitor (for example, a capacitor 154 described later), a semiconductor module for the driving rotary electric machine (for example, a power module 150a for a drive motor described later), and a semiconductor module for the rotating electric machine for power generation (for example). , A power module for a power generation motor 150b described later), and a semiconductor module for voltage control (for example, a power module 150c for a VCU described later) may be provided.

According to the rotary electric machine drive unit of (8), a rotary electric machine for driving, a rotary electric machine for power generation, a DC / DC converter, a reactor, a capacitor, a semiconductor module for a rotary electric machine for driving, a semiconductor module for a rotary electric machine for power generation, and By providing the semiconductor module for voltage control, the effects of the above-mentioned inventions (1) to (7) can be more reliably achieved.

(9) In the rotary electric machine drive unit of (8), the rotary electric machine drive unit includes a gear (for example, a motor gear MTG described later) for transmitting the outputs of the first rotary shaft and the second rotary shaft, and the reactor. May be arranged at a position closest to the gear among the parts constituting the power conversion device.

According to the rotary electric machine drive unit of (9), among the parts (for example, power module, DC / DC converter, DC connector, reactor, capacitor) constituting the power conversion device, the heaviest reactor is the first. Since it is arranged at a position closest to the gear that transmits the output of the rotating shaft and the second rotating shaft, transmission vibration to the gear and the vehicle body can be suppressed.

(10) In the rotary electric machine drive unit of (8) or (9), the DC / DC converter may be arranged in front of the vehicle in the power conversion device.

According to the rotary electric drive unit (10), since the DC / DC converter is arranged in front of the vehicle in the power converter, it is easier to access the fuse box normally arranged in front of the vehicle than in the power converter, and the fuse. The connection route with and can be shortened.

(11) In any of the rotary electric machine drive units (8) to (10), the semiconductor module for the drive rotary electric machine is the first rotary electric machine when viewed in the direction of the first rotary shaft and the second rotary shaft. It may be arranged at a position overlapping with the rotary electric machine and below the first rotation axis.

When viewed in the direction of the first rotation axis and the second rotation axis, the position overlapping the first rotation electric machine (driving rotary electric machine) and below the first rotation axis is one of the regions where vibration is likely to occur. .. Therefore, according to the rotary electric machine drive unit (11), the semiconductor module for the rotary electric machine for driving a heavy object having high rigidity is viewed in the direction of the first rotation axis and the second rotation axis, and the first rotation electric machine is used. Since it is arranged at a position overlapping with (driving rotary electric machine) and below the first rotating shaft, vibration can be suppressed more reliably.

(12) In any of the rotary electric machine drive units (8) to (11), the DC / DC converter overlaps with the first rotary electric machine when viewed in the direction of the first rotary shaft and the second rotary shaft. It may be located at the position and above the first rotation axis.

When viewed in the direction of the first rotation axis and the second rotation axis, the position overlapping the first rotation electric machine (driving rotary electric machine) and above the first rotation axis is one of the regions where vibration is likely to occur. .. Therefore, according to the rotary electric machine drive unit (12), the DC / DC converter of a heavy object having high rigidity is viewed in the directions of the first rotary shaft and the second rotary shaft, and the first rotary electric machine (driving rotation). Since it is arranged at a position overlapping with the electric machine) and above the first rotation axis, vibration can be suppressed more reliably.

(13) In any of the rotary electric machine drive units (8) to (12), the semiconductor module for the rotary electric machine for power generation is the second rotary electric machine when viewed in the direction of the first rotary shaft and the second rotary shaft. It may be arranged at a position overlapping with the rotary electric machine and below the second rotation axis.

When viewed in the direction of the first rotation axis and the second rotation axis, the position overlapping with the second rotation electric machine (rotary electric machine for power generation) and below the second rotation axis is one of the regions where vibration is likely to occur. .. Therefore, according to the rotary electric machine drive unit (13), the semiconductor module for the rotary electric machine for power generation, which has high rigidity, is viewed in the direction of the first rotary shaft and the second rotary shaft, and the second rotary electric machine is viewed. Since it is arranged at a position overlapping with (rotating electric machine for power generation) and below the second rotating shaft, vibration can be suppressed more reliably.

(14) In any of the rotary electric machine drive units (8) to (13), the reactor is above the second rotary shaft and above the second rotary shaft when viewed in the direction of the first rotary shaft and the second rotary shaft. It may be arranged in front of the vehicle with respect to the first rotation axis.

When viewed in the direction of the first rotation axis and the second rotation axis, the area above the second rotation axis and in front of the vehicle above the first rotation axis is one of the regions where vibration is likely to occur. Therefore, according to the rotary electric machine drive unit (14), the reactor of the heaviest object having high rigidity is viewed in the directions of the first rotation axis and the second rotation axis, and is above the second rotation axis and at the second position. Since it is arranged in front of the vehicle from one rotation axis, vibration can be suppressed more reliably.

(15) In any of the rotary electric machine drive units (8) to (14), the vehicle has a side frame, and the DC / DC converter is directed in the direction of the first rotation axis and the second rotation axis. As seen, the side frame may be extended and arranged in parallel with the extending direction.

When viewed in the direction of the first rotation axis and the second rotation axis, the position overlapping with the side frame is the region most susceptible to impact when colliding from the side. Therefore, according to the rotary electric machine drive unit (15), the DC / DC converter having the backup power supply for fast discharge is viewed in the direction of the first rotation axis and the second rotation axis, and is parallel to the direction in which the side frame extends. By arranging it so as to extend to, it is possible to avoid receiving a direct impact from the side frame in the event of a collision, which improves safety.

(16) In any of the rotary electric machine drive units (8) to (15), the reactor is at a position overlapping with the first rotary electric machine when viewed in the direction of the first rotary shaft and the second rotary shaft. It may be arranged above the first rotation axis.

When viewed in the direction of the first rotation axis and the second rotation axis, the position overlapping the first rotation electric machine (driving rotary electric machine) and above the first rotation axis is one of the regions where vibration is likely to occur. .. Therefore, according to the rotary electric machine drive unit (16), the reactor of the heaviest object having high rigidity is viewed in the directions of the first rotary shaft and the second rotary shaft, and the first rotary electric machine (drive rotary electric machine). Since it is arranged at a position overlapping with and above the first rotation axis, vibration can be suppressed more reliably.

(17) In any of the rotary electric machine drive units (8) to (16), the semiconductor module for voltage control is the second rotary shaft when viewed in the direction of the first rotary shaft and the second rotary shaft. It may be arranged above the first rotation axis and in front of the vehicle.

When viewed in the direction of the first rotation axis and the second rotation axis, the area above the second rotation axis and in front of the vehicle above the first rotation axis is one of the regions where vibration is likely to occur. Therefore, according to the rotary electric machine drive unit (17), the semiconductor module for voltage control of a heavy object having high rigidity is viewed in the direction of the first rotation axis and the second rotation axis, and is more than the second rotation axis. Since it is arranged above and in front of the vehicle from the first rotation axis, vibration can be suppressed more reliably.

According to the present invention, it is possible to provide a rotary electric machine drive unit that is smaller and cheaper than the conventional one.

It is a schematic diagram which looked at the rotary electric machine drive unit which concerns on 1st Embodiment of this invention from the front of a vehicle. It is a figure which looked at the rotary electric machine drive unit which concerns on 1st Embodiment of this invention from the left side of a vehicle. It is a figure which looked at the rotary electric machine drive unit which concerns on 2nd Embodiment of this invention from the left side of a vehicle. It is a figure which looked at the rotary electric machine drive unit which concerns on 3rd Embodiment of this invention from the left side of a vehicle. It is a figure which looked at the rotary electric machine drive unit which concerns on 4th Embodiment of this invention from the left side of a vehicle.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. In the description of each embodiment after the second embodiment, the same reference numerals are given to the configurations, actions and effects common to the other embodiments, and the description thereof will be omitted as appropriate.

[First Embodiment]
First, the configuration of the rotary electric machine drive unit 1 according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic view of the rotary electric machine drive unit 1 according to the first embodiment of the present invention as viewed from the front of the vehicle. FIG. 2 is a view of the rotary electric machine drive unit according to the first embodiment of the present invention as viewed from the left side of the vehicle. In FIGS. 1 and 2, U is upward, D is downward, Fr is the front of the vehicle, Rr is the rear of the vehicle, L is the left direction of the vehicle as seen by the driver, and R is the right direction of the vehicle as seen by the driver. ing. The same applies to FIGS. 3 to 5 described later.

The rotary electric machine drive unit 1 shown in FIG. 1 is provided in an engine room provided in the front portion of the vehicle body. Specifically, the rotary electric machine drive unit 1 includes a drive motor (first rotary electric machine) 10, a power generation motor (second rotary electric machine) 11, a housing 12, a lid member 13, and a sealing member 14. It includes a PCU (power control unit, power conversion device) 15, a PCU cover 16, and the like.

The drive motor 10 is a traveling drive motor for a vehicle, and generates a rotational driving force by electric power supplied from a battery. The drive motor 10 has a first rotation shaft 10a facing in the left-right direction of the vehicle.

The power generation motor 11 has a second rotating shaft 11a facing in the left-right direction of the vehicle. The power generation motor 11 generates power generation by the rotational driving force input to the second rotary shaft 11a. The second rotation shaft 11a is arranged in parallel with the first rotation shaft 10a of the drive motor 10.

The housing 12 is a motor case that houses the drive motor 10 and the power generation motor 11. The housing 12 has an opening 12a on the side of the first rotating shaft 10a and the second rotating shaft 11a.

The lid member 13 is arranged in the opening 12a of the housing 12 and covers the opening 12a. The lid member 13 functions not only as a motor cover but also as a PCU case for accommodating the PCU 15. That is, the lid member 13 of the present embodiment is a member that doubles as a motor cover and a PCU case.

The sealing member 14 is a gasket made of a sealing material. The sealing member 14 is interposed between the edge of the opening 12a in the housing 12 and the lid member 13, so that the housing 12 is sealed by the lid member 13.

The PCU 15 controls at least one of the drive motor 10 and the power generation motor 11. The PCU 15 is located on the outside of the lid member 13 so as to be arranged at a position (see FIG. 2) overlapping the drive motor 10 and the power generation motor 11 when viewed in the direction of the first rotation shaft 10a and the second rotation shaft 11a. That is, it is attached to the side of the lid member 13 opposite to the side of the housing 12.

The PCU cover 16 is arranged in the opening 13a of the lid member 13 and covers the opening 13a.

As shown in FIG. 2, the PCU 15 includes a power module (semiconductor module) 150, a DC / DC converter 151, a DC connector 152, a reactor 153, a capacitor 154, and the like. Further, the rotary electric machine drive unit 1 further includes a water jacket (cooler) 155 for cooling the PCU 15.

The power module 150 converts the DC current of a high-pressure battery (for example, a 48V battery, not shown) into a three-phase AC current and outputs it, and converts the three-phase AC current generated during regenerative power generation into a DC current to convert the high-pressure battery. Output to. The power module 150 is arranged at a position where it overlaps with the drive motor 10 and the power generation motor 11 when viewed in the direction of the first rotation shaft 10a and the second rotation shaft 11a. Specifically, the power module 150 includes a power module 150a for a drive motor, a power module 150b for a power generation motor, and a power module 150c for a voltage control unit (hereinafter, also referred to as a VCU (Voltage Control Unit)). In this way, the power module 150a for the drive motor and the power module 150b for the power generation motor are located at positions overlapping the first rotary shaft 10a and the second rotary shaft 11a when viewed in the direction of the first rotary shaft 10a and the second rotary shaft 11a. And by arranging the power modules 150c for VCU, the path from the drive motor 10 and the power generation motor 11 to the power module 150 can be shortened.

The DC / DC converter 151 has a function of stepping down the voltage of the high-voltage battery input to the PCU 15 to charge the 12V battery and supply power to the 12V system load. The position of the intermediate portion in the vertical direction of the DC / DC converter 151 is higher than that of the entire PCU 15. That is, the DC / DC converter 151 is arranged above the intermediate portion between the lowermost end portion and the uppermost end portion of the components 150 to 154 of the PCU 15. As shown in FIG. 1, since the DC / DC converter 151 is connected to the 12V battery 90 as the low voltage battery arranged on the upper surface of the housing 12, the connection cable 91 with the low voltage system is shortened. In addition, submersion of the DC / DC converter is suppressed when the engine room is submerged.

The DC connector 152 is connected to a high voltage battery (for example, a 48V battery, not shown) via a power cable (not shown). The DC connector 152 is arranged on the rear side of the vehicle of the housing 12, and the connection path with a high-voltage system such as a high-voltage battery normally arranged behind the housing 12 is shortened. Further, since the DC connector 152 is arranged above the other parts 150, 151, 153 to 155 constituting the PCU 15, the power cable is used after assembling these other parts 150, 151, 153 to 155 at the time of manufacturing. Can be connected.

The reactor 153 is arranged so as to surround the capacitor 154 together with the power module 150 and the DC / DC converter 151 when viewed in the direction of the first rotation shaft 10a and the second rotation shaft 11a.

The capacitor 154 is arranged so as to extend in parallel with the extending direction of the power module 150 when viewed in the direction of the first rotation shaft 10a and the second rotation shaft 11a. As a result, the distance from the power module 150 to the capacitor 154 is shortened, and the parasitic inductance is reduced. The capacitor 154 is arranged so as to be surrounded by the cooling-requiring parts 150, 151, 153 constituting the PCU 15 when viewed in the direction of the first rotation shaft 10a and the second rotation shaft 11a.

The water jacket 155 is arranged at a position where it overlaps with the drive motor 10 and the power generation motor 11 when viewed in the direction of the first rotation shaft 10a and the second rotation shaft 11a. Further, the water jacket 155 overlaps with the power module 150, the DC / DC converter 151 and the reactor 153 when viewed in the direction of the first rotation shaft 10a and the second rotation shaft 11a, and these parts, the drive motor 10 and the power generation. It is arranged between the motor 11 and the motor 11. These power modules 150, DC / DC converter 151, and reactor 153 are all components that require cooling, and are arranged so as to surround the capacitor 154 as described above, so that the turn of the cooling passage of the water jacket 155 can be turned. The arrangement is such that it becomes easy and the increase in pressure loss can be suppressed.

According to the rotary electric machine drive unit 1 according to the present embodiment, the following effects are achieved.
According to the present embodiment, the lid member 13 of the housing 12 and the PCU case accommodating the PCU 15 are integrated, and the PCU 15 is directly arranged on the lid member 13 covering the opening 12a of the housing 12. Therefore, since an air layer is not separately provided between the PCU 15 and the drive motor 10 and the power generation motor 11, the rotary electric machine drive unit 1 can be miniaturized while suppressing the thickness of the PCU 15 in the direction of the rotation axis. At the same time, since the lid member 13 of the housing 12 and the PCU case for accommodating the PCU 15 are also used, the number of parts can be reduced and the cost can be reduced.

Further, according to the present embodiment, the PCU 15 which is a rigid member is arranged at a position where it overlaps with the drive motor 10 and the power generation motor 11 when viewed in the direction of the first rotation shaft 10a and the second rotation shaft 11a. Vibration generated in the motor case and transmission case can be suppressed. Therefore, the formation of ribs on the outer surface of the motor case or transmission case, which has been conventionally required for vibration suppression, becomes unnecessary, and weight increase or cost increase can be suppressed.

Further, according to the present embodiment, the power module 150, which is a rigid member, is arranged at a position where it overlaps with the drive motor 10 and the power generation motor 11 when viewed in the direction of the first rotation shaft 10a and the second rotation shaft 11a. Therefore, the vibration generated in the motor case and the transmission case can be suppressed more reliably.

Further, according to the present embodiment, the water jacket 155, which is a rigid member, is arranged at a position where it overlaps with the drive motor 10 and the power generation motor 11 when viewed in the direction of the first rotation shaft 10a and the second rotation shaft 11a. Therefore, the vibration generated in the motor case and the transmission case can be suppressed more reliably. In particular, since the water jacket 155 having high rigidity can be arranged at the attachment point of the drive motor 10 and the power generation motor 11 to the housing 12, deformation due to vibration can be suppressed.

Further, according to the present embodiment, the DC / DC converter 151 is arranged so that the position of the intermediate portion in the vertical direction is upward as compared with the entire PCU 15. That is, since the DC / DC converter 151 is arranged above the PCU 15, the connection cable 91 with a low voltage system such as a low voltage battery (12V battery) connected from above can be shortened. Further, even if the inside of the engine room is flooded, the DC / DC converter 151 can be suppressed from being submerged, so that the safety is high.

Further, according to the present embodiment, since the DC connector 152 is arranged above the PCU 15, the DC cable can be connected after assembling the drive motor 10, the power generation motor 11, the gear, and the PCU 15 in the engine room. .. Therefore, the assemblability at the time of manufacturing the rotary electric machine drive unit 1 can be improved.

Further, according to the present embodiment, since the parts constituting the PCU 15 are arranged in one layer so as to be arranged in a plane perpendicular to the direction of the first rotation shaft 10a and the second rotation shaft 11a, the first rotation in the PCU 15 is performed. It is possible to prevent the thickness of the shaft 10a and the second rotating shaft 11a from becoming thicker. Further, the electric arrangement and the cooling circuit of the water jacket 155 can be simplified, and the rotary electric machine drive unit 1 can be downsized. Furthermore, since the PCU15 is arranged in one layer, it is possible to reduce the size of each component of the PCU15 in the height direction according to the evolution of technology, and utilize the same cooling circuit and electrical wiring. Therefore, high communality can be ensured and development man-hours can be reduced.

Further, while the PCU is conventionally arranged on the upper surface of the housing 12, in the present embodiment, the PCU 15 is arranged on the side surface of the housing 12. Since the 12V battery 90 as a low voltage battery is arranged on the upper surface of the housing 12, the connection path with the DC / DC converter 151 can be further shortened.

[Second Embodiment]
Next, the configuration of the rotary electric machine drive unit 2 according to the second embodiment of the present invention will be described with reference to FIG. FIG. 3 is a view of the rotary electric machine drive unit 2 according to the second embodiment of the present invention as viewed from the left side of the vehicle. The rotary electric machine drive unit 2 according to the second embodiment is arranged in one layer at a position where the PCU 15A overlaps the drive motor 10 and the power generation motor 11 when viewed in the direction of the first rotary shaft 10a and the second rotary shaft 11a. The points are the same as in the first embodiment, but the arrangement of each component in the PCU15A is different from that in the first embodiment.

The reactor 153, which is the heaviest component of the PCU 15A, is arranged at a position closest to the motor gear MTG connected to the vehicle body as compared with the other components 150 to 152, 154 constituting the PCU 15A. As a result, vibration transmitted to the motor gear MTG and the vehicle body can be suppressed. The same can be said for the fourth embodiment described later with respect to this configuration and effect.

Further, the DC / DC converter 151 is arranged in front of the vehicle in the PCU 15A. This makes it easier to access the fuse box 92 normally arranged in front of the vehicle than the PCU15A, and the connection path with the fuse can be shortened.

[Third Embodiment]
Next, the configuration of the rotary electric machine drive unit 3 according to the third embodiment of the present invention will be described with reference to FIG. FIG. 4 is a view of the rotary electric machine drive unit 3 according to the third embodiment of the present invention as viewed from the left side of the vehicle. The rotary electric machine drive unit 3 according to the third embodiment is arranged in one layer at a position where the PCU 15B overlaps with the drive motor 10 and the power generation motor 11 when viewed in the direction of the first rotary shaft 10a and the second rotary shaft 11a. The points are the same as in the first and second embodiments, but the arrangement of each component in the PCU15B is different from that in the first and second embodiments.

When viewed in the direction of the first rotary shaft 10a and the second rotary shaft 11a, the position overlapping the drive motor 10 and below the first rotary shaft 10a is one of the regions where vibration is likely to occur. Therefore, in the present embodiment, the power module 150a for a heavy-duty drive motor having high rigidity is viewed in the direction of the first rotation shaft 10a and the second rotation shaft 11a, and at a position overlapping with the drive motor 10 and first rotation. It is arranged below the shaft 10a. As a result, vibration can be suppressed more reliably. The same can be said for this configuration and effect in the first embodiment described above and the fourth embodiment described later.

When viewed in the direction of the first rotary shaft 10a and the second rotary shaft 11a, the position overlapping the drive motor 10 and above the first rotary shaft 10a is one of the regions where vibration is likely to occur. Therefore, in the present embodiment, the DC / DC converter 151, which is a heavy object having high rigidity, is viewed in the direction of the first rotation shaft 10a and the second rotation shaft 11a, and is at a position overlapping the drive motor 10 and the first rotation shaft. It is arranged above 10a. As a result, vibration can be suppressed more reliably.

When viewed in the direction of the first rotating shaft 10a and the second rotating shaft 11a, the position overlapping the power generation motor 11 and below the second rotating shaft 11a is one of the regions where vibration is likely to occur. Therefore, in the present embodiment, the power module 150b for a heavy-duty power generation motor having high rigidity is viewed in the direction of the first rotation shaft 10a and the second rotation shaft 11a, and at a position overlapping with the power generation motor 11 and in the second rotation. It is arranged below the shaft 11a. As a result, vibration can be suppressed more reliably. The same can be said for the fourth embodiment described later with respect to this configuration and effect.

When viewed in the direction of the first rotating shaft 10a and the second rotating shaft 11a, the area above the second rotating shaft 11a and in front of the vehicle is one of the regions where vibration is likely to occur. Therefore, in the present embodiment, the heaviest reactor 153 having high rigidity is above the second rotation shaft 11a and above the second rotation shaft 10a when viewed in the directions of the first rotation shaft 10a and the second rotation shaft 11a. It is placed in front of the vehicle. As a result, vibration can be suppressed more reliably. The same can be said for the first and second embodiments described above and the fourth embodiment described later with respect to this configuration and effect.

When viewed in the direction of the first rotating shaft 10a and the second rotating shaft 11a, the position overlapping with the side frame SF is a region most susceptible to impact when colliding from the side. Therefore, in the present embodiment, the DC / DC converter 151 having a backup power supply for fast discharge is arranged so as to extend in parallel with the direction in which the side frame SF extends in the direction of the first rotation axis 10a and the second rotation axis 11a. Will be done. As a result, it is possible to avoid directly receiving an impact from the side frame SF at the time of a collision, which improves safety.

[Fourth Embodiment]
Next, the configuration of the rotary electric machine drive unit 4 according to the fourth embodiment of the present invention will be described with reference to FIG. FIG. 5 is a view of the rotary electric machine drive unit 4 according to the fourth embodiment of the present invention as viewed from the left side of the vehicle. The rotary electric machine drive unit 4 according to the fourth embodiment is arranged in one layer at a position where the PCU 15C overlaps with the drive motor 10 and the power generation motor 11 when viewed in the direction of the first rotary shaft 10a and the second rotary shaft 11a. The points are the same as those of the first, second, and third embodiments, but the arrangement of each component in the PCU15C is different from that of the first, second, and third embodiments.

When viewed in the direction of the first rotary shaft 10a and the second rotary shaft 11a, the position overlapping the drive motor 10 and above the first rotary shaft 10a is one of the regions where vibration is likely to occur. Therefore, in the present embodiment, the heaviest reactor 153 having high rigidity is viewed in the direction of the first rotation shaft 10a and the second rotation shaft 11a, and is at a position overlapping the drive motor 10 and from the first rotation shaft 10a. Is also placed above. As a result, vibration can be suppressed more reliably.

When viewed in the direction of the first rotating shaft 10a and the second rotating shaft 11a, the area above the second rotating shaft 11a and in front of the vehicle is one of the regions where vibration is likely to occur. Therefore, in the present embodiment, the VCU power module 150c, which is a heavy object having high rigidity, is above the second rotation shaft 11a and in the first rotation when viewed in the directions of the first rotation shaft 10a and the second rotation shaft 11a. It is arranged in front of the vehicle from the shaft 10a. As a result, vibration can be suppressed more reliably.

The present invention is not limited to the above embodiment, and modifications, improvements, and the like to the extent that the object of the present invention can be achieved are included in the present invention.

1, 2, 3, 4 rotary electric machine drive unit 10 Drive motor (1st rotary electric machine)
10a 1st rotary shaft 11 Power generation motor (2nd rotary electric machine)
11a 2nd rotating shaft 12 Housing 12a Opening 13 Lid member 13a Opening 14 Sealing member 15, 15A, 15B, 15C PCU (power conversion device)
150, 150A, 150B, 150C power module (semiconductor module)
150a Power module for drive motor 150b Power module for power generation motor 150c Power module for VCU 151 DC / DC converter 152 DC connector (input section)
153 Reactor 154 Condenser 155 Water jacket (cooler)
16 PCU Cover 90 12V Battery 91 Connection Cable 92 Fuse Box MTG Motor Gear SF Side Frame

Claims (17)

It is a rotary electric machine drive unit mounted on a vehicle.
With the first rotary electric machine having the first rotation axis,
A second rotating electric machine having a second rotating shaft parallel to the first rotating shaft,
A housing that houses the first rotary electric machine and the second rotary electric machine and has an opening on the side of the first rotary shaft and the second rotary shaft.
The lid member arranged in the opening and
The first rotation is attached to the outside of the lid member so as to be arranged at a position overlapping the first rotation electric machine and the second rotation electric machine when viewed in the direction of the first rotation axis and the second rotation axis. A rotary electric machine drive unit including a power conversion device that controls at least one of the electric machine and the second rotary electric machine. The power conversion device has a semiconductor module and has a semiconductor module.
The rotary electric machine drive according to claim 1, wherein the semiconductor module is arranged at a position overlapping the first rotary electric machine and the second rotary electric machine when viewed in the direction of the first rotary axis and the second rotary axis. unit. The rotary electric machine drive unit further includes a cooler for cooling the power conversion device.
The rotation according to claim 1 or 2, wherein the cooler is arranged at a position overlapping the first rotary electric machine and the second rotary electric machine when viewed in the direction of the first rotary shaft and the second rotary shaft. Electric drive unit. The power converter has a DC / DC converter and has a DC / DC converter.
The rotary electric drive unit according to any one of claims 1 to 3, wherein the DC / DC converter has an upper position of an intermediate portion in the vertical direction as compared with the whole of the power conversion device. The power converter has an input unit from a power source and has an input unit.
The rotary electric machine drive unit according to any one of claims 1 to 4, wherein the input unit is arranged above the power conversion device. Claims 1 to 5 of the power conversion device, wherein each component constituting the power conversion device is arranged in one layer so as to be arranged in a plane perpendicular to the direction of the first rotation axis and the second rotation axis. The rotary electric drive unit described in any of. The rotary electric machine drive unit according to any one of claims 1 to 6, further comprising a power storage device arranged on the upper surface of the housing. The first rotary electric machine is a drive rotary electric machine.
The second rotary electric machine is a rotary electric machine for power generation.
The power conversion device includes a DC / DC converter, a reactor, a capacitor, a semiconductor module for a drive rotary electric machine, a semiconductor module for a power generation rotary electric machine, and a voltage control device as components constituting the power conversion device. The rotary electric power drive unit according to any one of claims 1 to 7, which has a semiconductor module. The rotary electric machine drive unit includes gears for transmitting the outputs of the first rotary shaft and the second rotary shaft.
The rotary electric machine drive unit according to claim 8, wherein the reactor is arranged at a position closest to the gear among the parts constituting the power conversion device. The rotary electric machine drive unit according to claim 8 or 9, wherein the DC / DC converter is arranged in front of the vehicle in the power conversion device. The semiconductor module for the drive rotary electric machine is arranged at a position overlapping the first rotary electric machine and below the first rotary shaft when viewed in the direction of the first rotary shaft and the second rotary shaft. , The rotary electric machine drive unit according to any one of claims 8 to 10. 8. The DC / DC converter is arranged at a position overlapping the first rotary electric machine and above the first rotary shaft when viewed in the direction of the first rotary shaft and the second rotary shaft. 11. The rotary electric machine drive unit according to any one of 11. The semiconductor module for the rotary electric machine for power generation is arranged at a position overlapping the second rotary electric machine and below the second rotary shaft when viewed in the direction of the first rotary shaft and the second rotary shaft. , The rotary electric machine drive unit according to any one of claims 8 to 12. The reactors 8 to 13 are arranged above the second rotation axis and in front of the vehicle when viewed in the direction of the first rotation axis and the second rotation axis. The rotary electric drive unit described in either. The vehicle has a side frame
The rotation according to any one of claims 8 to 14, wherein the DC / DC converter is arranged so as to extend in parallel with the direction in which the side frame extends when viewed in the direction of the first rotation axis and the second rotation axis. Electric drive unit. 8. Rotating electric machine drive unit described in Crab. The voltage control semiconductor module is arranged above the second rotation axis and in front of the vehicle when viewed in the direction of the first rotation axis and the second rotation axis. The rotary electric drive unit according to any one of claims 8 to 16.

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