Electrical parts

Abstract

To provide an electrical component in which heat received by a reactor is suppressed.SOLUTION: An electrical component comprises: a reactor 23; first switch modules 34A, 34B, 34C which are connected to an externally provided first heat generating component 4; second switch modules 44A, 44B, 44C which are connected to a second heat generating component 5 whose heat generation amount is greater than that of the first heat generating component; first conductive members 33A, 33B, 33C which connect the first heat generating component to the first switch modules; and second conductive members 43A, 43B, 43C which connect the second heat generating component to the second switch modules. The shortest distance between the first conductive member and the reactor is shorter than that between the second conductive member and the reactor.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The disclosure herein relates to electrical components. [Background technology]

[0002] Patent Document 1 describes a power converter including two sets of inverter circuits, an output bus bar connecting the two sets of inverter circuits to two motors, and a reactor. One set of inverter circuits is connected to one motor via the output bus bar. Another set of inverter circuits is connected to another motor via the output bus bar. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-71093 Summary of the Invention [Problem to be solved by the invention]

[0004] If the shortest distance between the reactor and the output bus bar connected to the motor that generates the greater amount of heat of the two motors is shorter than the shortest distance between the reactor and the output bus bar connected to the other motor, the heat transferred from the motor that generates the greater amount of heat to the reactor is likely to be large, raising concerns that the reactor will receive excessive heat.

[0005] Therefore, an object of the present disclosure is to provide an electrical component in which the heat received by a reactor is suppressed. [Means for solving the problem]

[0006] An electrical component according to one aspect of the present disclosure comprises: A reactor (23), a first switch module (34A, 34B, 34C) connected to an external first heat-generating component (4); a second switch module (44A, 44B, 44C) connected to a second heat generating component (5) that generates more heat than the first heat generating component; a first conductive member (33A, 33B, 33C) connecting the first heat generating component and the first switch module; a second conductive member (43A, 43B, 43C) connecting the second heat-generating component and the second switch module, The shortest distance (L1) between the first conductive member and the reactor is shorter than the shortest distance (L2) between the second conductive member and the reactor. the law of nature, Further provided is a heat insulating material (180) provided between the first switch module and the reactor, At least a portion of the heat insulating material is provided on the shortest path connecting the second conductive member and the reactor. According to another aspect of the present disclosure, there is provided an electrical component comprising: A reactor (23), a first switch module (34A, 34B, 34C) connected to an external first heat-generating component (4); a second switch module (44A, 44B, 44C) connected to a second heat generating component (5) that generates more heat than the first heat generating component; a first conductive member (33A, 33B, 33C) connecting the first heat generating component and the first switch module; a second conductive member (43A, 43B, 43C) connecting the second heat-generating component and the second switch module, The shortest distance (L1) between the first conductive member and the reactor is shorter than the shortest distance (L2) between the second conductive member and the reactor, Further provided is a terminal block (170) that supports the first conductive member and the second conductive member, The terminal block is arranged in a width direction (WD) perpendicular to the arrangement direction (TD) in which the first switch module and the second switch module are arranged, and The first conductive member and the second conductive member extend toward the terminal block; The device further includes a heat insulator (180) provided between the first switch module and the terminal block. According to another aspect of the present disclosure, there is provided an electrical component comprising: A reactor (23), a first switch module (34A, 34B, 34C) connected to an external first heat-generating component (4); a second switch module (44A, 44B, 44C) connected to a second heat generating component (5) that generates more heat than the first heat generating component; a first conductive member (33A, 33B, 33C) connecting the first heat generating component and the first switch module; a second conductive member (43A, 43B, 43C) connecting the second heat-generating component and the second switch module, The shortest distance (L1) between the first conductive member and the reactor is shorter than the shortest distance (L2) between the second conductive member and the reactor, The heat of the second conductive member is greater than the heat of the first conductive member, With respect to the arrangement direction (TD) in which the first switch module and the second switch module are arranged, the reactor, the first switch module, and the second switch module are arranged in the order of reactor, first switch module, second switch module, Further provided is a terminal block (170) that supports the first conductive member and the second conductive member, The terminal block is arranged in line with the first switch module and the second switch module in the width direction (WD) perpendicular to the arrangement direction, The first conductive member and the second conductive member extend toward the terminal block; a first output terminal (36) which is a terminal connected to a first cable (91) which is connected to a first heat-generating component in the first conductive member, and a second output terminal (46) which is a terminal connected to a second cable (92) which is connected to a second heat-generating component in the second conductive member, are provided on the terminal block; The shortest distance (L3) between the first output terminal and the reactor is shorter than the shortest distance (L4) between the second output terminal and the reactor, The switch module further includes a heat insulating material (180) provided between the first switch module and the terminal block. do.

[0007] This reduces the heat received by the reactor (23).

[0008] The reference numbers in parentheses above merely indicate the corresponding relationship with the configurations described in the embodiments below, and do not in any way limit the technical scope. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a schematic configuration diagram of a drive system of a vehicle to which an electrical component is applied; [Figure 2] FIG. 2 is a diagram showing the configuration of a drive system for an electric component. [Figure 3] FIG. 2 is a plan view showing the configuration of an electrical component. [Figure 4] FIG. 10 is a plan view of a second embodiment of the electrical component. [Figure 5] FIG. 10 is a plan view of a third embodiment of the electrical component. [Figure 6] FIG. 10 is a plan view of a fourth embodiment of the electrical component. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, several embodiments for carrying out the present disclosure will be described with reference to the drawings. In each embodiment, parts corresponding to matters described in the preceding embodiment will be assigned the same reference numerals, and duplicated explanations may be omitted. In each embodiment, when only a part of the configuration is described, the other previously described embodiments may be applied to the other parts of the configuration.

[0011] In addition, it is not only possible to combine parts that are explicitly stated as being possible in each embodiment, but it is also possible to partially combine embodiments, embodiments and variants, and variants even if not explicitly stated, as long as there are no particular problems with the combination.

[0012] (First embodiment) FIG. 1 is a schematic diagram of a drive system of a vehicle to which an electrical component 10 is applied. The vehicle has an engine 1 and a drive motor 5 as drive sources for traveling, and a generator motor 4. The engine 1, the generator motor 4, and the drive motor 5 are interconnected via a planetary gear mechanism 3. The output shaft of the engine 1 is connected to a planetary gear of the planetary gear mechanism 3. The output shaft of the generator motor 4 is connected to a sun gear of the planetary gear mechanism 3. The output shaft of the drive motor 5 is connected to a ring gear of the planetary gear mechanism 3. In the drawing, the engine 1 is referred to as ENG, the generator motor 4 is referred to as MG1, and the drive motor 5 is referred to as MG2.

[0013] One gear 8A that constitutes a reduction gear 8 is attached to the output shaft of the drive motor 5. The rotation of another gear 8B that constitutes the reduction gear 8 is transmitted to a drive shaft 9 of the drive wheels via a differential gear (not shown). Gears 8A and 8B work in harmony with each other. The driving force of the engine 1 and the driving force of the drive motor 5 are transmitted to the drive shaft 9 of the drive wheels via the reduction gear 8, enabling the vehicle to travel.

[0014] In this configuration, the planetary gear mechanism 3 divides the driving force from the engine 1 between the output shaft of the drive motor 5, to which the gear 8A of the speed reducer 8 is attached, and the output shaft of the generator motor 4. The generator motor 4 is driven and rotated by the driving force of the engine 1, and generates electric power. The electric power generated by the generator motor 4 is used to drive the drive motor 5 and to charge the battery 70.

[0015] Furthermore, the output shaft of the engine 1 is connected to the output shaft of the drive motor 5 via the planetary gear mechanism 3, so that the driving force of the engine 1 and the driving force of the drive motor 5 can be combined to rotate the gear 8A of the reduction gear 8. In this way, the vehicle according to this embodiment is a so-called series-parallel hybrid vehicle.

[0016] As described above, the drive motor 5 generates driving force for running the vehicle. Furthermore, when the vehicle decelerates, the drive motor 5 functions as a generator, generating electric power through so-called regenerative braking. As described above, the generator motor 4 is driven by part of the driving force of the engine 1 to generate electric power. Furthermore, when starting the engine 1, the generator motor 4 functions as an electric motor, and also plays a role in cranking the engine 1.

[0017] The generator motor 4 and the drive motor 5 are each connected to an inverter circuit 6. The inverter circuit 6 includes inverters 30, 40 that correspond to the generator motor 4 and the drive motor 5, respectively. The inverter circuit 6 is connected to a battery 70. The inverters 30, 40 may be referred to as a first inverter 30 and a second inverter 40.

[0018] When the generator motor 4 and the drive motor 5 are made to function as electric motors, the motor control device 7 controls the inverter circuit 6 so that drive current is supplied from the battery 70 to each of the motors 4, 5. This allows the vehicle to generate driving force and start the engine 1. On the other hand, when the generator motor 4 and the drive motor 5 generate electricity, the motor control device 7 controls the inverter circuit 6 so that the electric power can be extracted via the inverter circuit 6. This makes it possible to use the electric power generated by the generator motor 4 and the drive motor 5 to charge the battery 70 or to drive the other of the motors 4, 5. In the drawings, the inverter circuit 6 is referred to as INV and the motor control device 7 as ECU.

[0019] In a series-parallel hybrid vehicle having such a configuration, the vehicle can be run using only the engine 1, only the drive motor 5, or both the engine 1 and the drive motor 5.

[0020] For this reason, high output is required of the drive motor 5. A high voltage is supplied to the drive motor 5, and the rated current of the drive motor 5 is set to be higher than the rated current of the generator motor 4. As a result, more current flows through the drive motor 5 than through the generator motor 4. The amount of heat generated by the drive motor 5 becomes greater than the amount of heat generated by the generator motor 4. The generator motor 4 corresponds to the first heat-generating component. The drive motor 5 corresponds to the second heat-generating component.

[0021] FIG. 2 is a diagram showing the configuration of a drive system for the electrical component 10. The battery 70 is a DC voltage source composed of a chargeable and dischargeable secondary battery. The secondary battery is, for example, a lithium-ion battery or a nickel-metal hydride battery. The battery 70 supplies power to the generator motor 4 and the drive motor 5 via the electrical component 10. The electrical component 10 converts the DC power of the battery 70 into AC power suitable for driving the generator motor 4 and the drive motor 5. The electrical component 10 also converts the AC power generated by the generator motor 4 and the drive motor 5 into DC power that can charge the battery 70. The electrical component 10 is sometimes referred to as a power conversion device.

[0022] The electrical component 10 includes a boost converter 20, a first inverter 30, a second inverter 40, current sensors 51, 52, 53, and capacitors 61, 62. The current sensors 51, 52, 53 may be referred to as a first current sensor 51, a second current sensor 52, and a third current sensor 53. The capacitors 61, 62 may be referred to as a first capacitor 61 and a second capacitor 62.

[0023] The input terminal of the boost converter 20 is connected to low-voltage power lines 11 and 12 of the battery 70. The output terminal of the boost converter 20 is connected to high-voltage power lines 13 and 14 of the inverter circuit 6. The low-voltage power lines 11 and 12 are power lines that electrically connect the battery 70 and the boost converter 20. The high-voltage power lines 13 and 14 are power lines that electrically connect the boost converter 20 and the inverter circuit 6. A first capacitor 61 is connected between the high-potential side low-voltage power line 11 and the low-potential side low-voltage power line 12. A second capacitor 62 is connected between the high-potential side high-voltage power line 13 and the low-potential side high-voltage power line 14.

[0024] The boost converter 20 boosts the output voltage of the battery 70 to a voltage suitable for driving the generator motor 4 and the drive motor 5. The boost converter 20 boosts the power on the low-voltage power lines 11, 12 and supplies it to the high-voltage power lines 13, 14. The boost converter 20 also steps down the DC power converted by the first inverter 30 and the second inverter 40 to power that can be charged into the battery 70. The boost converter 20 steps down the power on the high-voltage power lines 13, 14 and supplies it to the low-voltage power lines 11, 12.

[0025] The boost converter 20 has two switching elements 21 and 22, two diodes 21A and 22A, and a reactor 23. The two switching elements 21 and 22 are connected in series between the low-voltage power line 11 and the low-potential side low-voltage power line 12. The two switching elements 21 and 22 are connected in series in the order of switching element 21, switching element 22 from the low-voltage power line 11 to the low-potential side low-voltage power line 12.

[0026] A diode 21A is connected in anti-parallel to the switching element 21. A diode 22A is connected in anti-parallel to the switching element 22. The two switching elements 21, 22 and the two diodes 21A, 22A are resin-sealed to form an A-phase switch module 24A. A terminal connected to the high-voltage power line 13, a terminal connected to the high-voltage power line 14, and a terminal connected to the reactor 23 are exposed from the sealing resin. The terminal connected to the reactor 23 in the A-phase switch module 24A may be referred to as a terminal 25.

[0027] One end of the reactor 23 is connected to the low-voltage power line 11 and is also connected to the positive terminal of the first capacitor 61. The other end of the reactor 23 is connected to the relay line 15. The other end of the reactor 23 is connected to a terminal 25 of the A-phase switch module 24A via the relay line 15. A first current sensor 51 is provided on the relay line 15.

[0028] The first inverter 30 is connected to high-voltage power lines 13, 14. The high-voltage power line 13 connected to the first inverter 30 is connected to a positive terminal of the second capacitor 62. The high-voltage power line 14 connected to the first inverter 30 is connected to a negative terminal of the second capacitor 62.

[0029] The first inverter 30 has six switching elements 31-32 and six diodes 31A-32A. The two switching elements 31, 32 are connected in series between the high-voltage power line 13 and the high-voltage power line 14, with the switching element 31 on the high-potential side. A diode 31A is connected in anti-parallel to the switching element 31. A diode 32A is connected in anti-parallel to the switching element 32. Two switching elements 31, 32 and two diodes 31A, 32A make up a set, and three sets are connected in parallel between the high-voltage power line 13 and the high-voltage power line 14.

[0030] Two switching elements 31, 32 and two diodes 31A, 32A are resin-sealed to form a first U-phase switch module 34A, a first V-phase switch module 34B, and a first W-phase switch module 34C. Exposed from each sealing resin are a terminal connected to high-voltage power line 13, a terminal connected to high-voltage power line 14, and a terminal connected to generator motor 4. The terminals of first switch modules 34A to 34C connected to generator motor 4 may be referred to as terminals 35.

[0031] The terminal 35 exposed from the first U-phase switch module 34A is connected to the first U-phase coil of the generator motor 4 via the first U-phase bus bar 33A. The terminal 35 exposed from the first V-phase switch module 34B is connected to the first V-phase coil of the generator motor 4 via the first V-phase bus bar 33B. The terminal 35 exposed from the first W-phase switch module 34C is connected to the first W-phase coil of the generator motor 4 via the first W-phase bus bar 33C. A second current sensor 52 is individually provided on each of the first U-phase bus bar 33A to the first W-phase bus bar 33C.

[0032] The second inverter 40 has a configuration similar to that of the first inverter 30. The second inverter 40 is connected to high-voltage power lines 13 and 14. The high-voltage power line 13 connected to the second inverter 40 is connected to the positive terminal of a second capacitor 62. The low-potential side high-voltage power line 14 connected to the second inverter 40 is connected to the negative terminal of the second capacitor 62.

[0033] The second inverter 40 has six switching elements 41-42 and six diodes 41A-42A. The two switching elements 41, 42 are connected in series between the high-voltage power line 13 and the low-potential side high-voltage power line 14, with the switching element 41 on the high-potential side. A diode 41A is connected in anti-parallel to the switching element 41. A diode 42A is connected in anti-parallel to the switching element 42. Two switching elements 41, 42 and two diodes 41A, 42A make up one set, and three sets are connected in parallel between the high-voltage power line 13 and the low-potential side high-voltage power line 14.

[0034] Two switching elements 41, 42 and two diodes 41A, 42A are sealed with resin to form a second U-phase switch module 44A, a second V-phase switch module 44B, and a second W-phase switch module 44C. Terminals connected to high-voltage power line 13, a terminal connected to high-voltage power line 14, and a terminal connected to drive motor 5 are exposed from each sealing resin. The terminals connected to drive motor 5 in second switch modules 44A to 44C may be referred to as terminals 45.

[0035] Terminals 45 exposed from second U-phase switch module 44A are connected to the second U-phase coil of drive motor 5 via second U-phase bus bar 43A. Terminals 45 exposed from second V-phase switch module 44B are connected to the second V-phase coil of drive motor 5 via second V-phase bus bar 43B. Terminals 45 exposed from second W-phase switch module 44C are connected to the second W-phase coil of drive motor 5 via second W-phase bus bar 43C. Third current sensors 53 are individually provided on second U-phase bus bar 43A to second W-phase bus bar 43C, respectively.

[0036] As an example, semiconductor elements such as IGBTs and power MOSFETs can be used for the switching elements 21 to 42. In this embodiment, n-channel IGBTs are used for the switching elements 21 to 42. The anodes of the diodes 21A to 42A are connected to the emitter electrodes of the corresponding switching elements 21 to 42. The cathodes of the diodes 21A to 42A are connected to the collector electrodes of the corresponding switching elements 21 to 42.

[0037] 3 is a plan view showing the configuration of the electrical component 10. In describing each component, the thickness direction of the switch modules 24A to 44C may be referred to as the thickness direction TD. The thickness direction TD is also the arrangement direction of the first switch modules 34A to 34C and the second switch modules 44A to 44C. The thickness direction TD may also be referred to as the arrangement direction TD. The width direction perpendicular to the thickness direction TD may be referred to as the width direction WD. The height direction perpendicular to the thickness direction TD and the width direction WD may be referred to as the height direction HT.

[0038] In addition to the components described above, the electrical component 10 also includes a cooler 100, a case 150, and a sensor unit 160. The cooler 100 includes a supply pipe 110, eight relay pipes 120, and a discharge pipe 130. The supply pipe 110 extends along the thickness direction TD. A supply port 110A through which a refrigerant can be supplied is provided at an end of the supply pipe 110. The discharge pipe 130 extends along the thickness direction TD. A discharge port 130A through which a refrigerant can be discharged is provided at an end of the discharge pipe 130. The supply pipe 110 and the discharge pipe 130 are spaced apart in the width direction WD. The number of relay pipes can be changed as appropriate depending on the number of switch modules.

[0039] Eight relay pipes 120 are provided between the supply pipes 110 and the discharge pipes 130. The relay pipes 120 have two ends separated in the width direction WD. The supply pipe 110 is connected to one end of the relay pipes 120. The discharge pipe 130 is connected to the other end of the relay pipes 120. The refrigerant supplied from the supply port 110A passes through the supply pipes 110, the relay pipes 120, and the discharge pipe 130, and is discharged from the discharge port 130A. Furthermore, switch modules 24A to 44C are provided individually between the relay pipes 120 adjacent to each other in the thickness direction TD. The seven switch modules 24A to 44C are housed in seven spaces provided in the cooler 100. This constitutes the power module 140.

[0040] The case 150 includes a first side wall 151, a second side wall 152, a third side wall 153, a fourth side wall 154, and a bottom wall 155. The first side wall 151 and the third side wall 153 are spaced apart in the thickness direction TD. The second side wall 152 and the fourth side wall 154 are spaced apart in the width direction WD. The first side wall 151, the second side wall 152, the third side wall 153, and the fourth side wall 154 are connected in an annular shape to form an annular wall 156.

[0041] The annular wall 156 has two ends that are spaced apart in the height direction HT. A bottom wall 155 is provided at one end of the annular wall 156. A storage space 157 is defined by the first side wall 151, the second side wall 152, the third side wall 153, the fourth side wall 154, and the bottom wall 155. The storage space 157 houses the reactor 23, the first capacitor 61, the second capacitor 62, the power module 140, and the sensor unit 160. The first capacitor 61 and the second capacitor 62 form a capacitor module 63.

[0042] In the storage space 157, the capacitor module 63, the power module 140, and the sensor unit 160 are arranged side by side in the width direction WD. The power module 140 is provided between the capacitor module 63 and the sensor unit 160. The sensor unit 160 is provided adjacent to the second side wall 152. The sensor unit 160 is provided adjacent to the fourth side wall 154.

[0043] In the storage space 157, the power module 140 and the reactor 23 are arranged side by side in the thickness direction TD. The power module 140 is provided adjacent to the first side wall 151. The reactor 23 is provided adjacent to the third side wall 153. The supply pipe 110 and the discharge pipe 130 are passed through the first side wall 151.

[0044] In the direction from reactor 23 toward switch modules 24A-44C, supply port 110A and discharge port 130A are provided at positions farther from reactor 23 than switch modules 24A-44C are. In other words, in the thickness direction TD, supply port 110A and discharge port 130A are provided on the opposite side of second switch modules 44A-44C to the side on which first switch modules 34A-34C are arranged.

[0045] According to this, the refrigerant supplied from supply port 110A flows inside supply pipe 110 toward reactor 23. The refrigerant flowing into supply pipe 110 flows into each relay pipe 120 and then flows into discharge pipe 130. The refrigerant then flows inside discharge pipe 130 toward discharge port 130A, away from reactor 23. In this way, the flow path through which the refrigerant flows is formed in a bent shape.

[0046] For convenience in describing the seven air gaps, they will be referred to as the first air gap, second air gap, third air gap, fourth air gap, fifth air gap, sixth air gap, and seventh air gap, in order from the air gap closest to reactor 23. A first U-phase switch module 34A is provided in the first air gap. A first V-phase switch module 34B is provided in the second air gap. A first W-phase switch module 34C is provided in the third air gap. A second U-phase switch module 44A is provided in the fourth air gap. A second V-phase switch module 44B is provided in the fifth air gap. A second W-phase switch module 44C is provided in the sixth air gap. An A-phase switch module 24A is provided in the seventh air gap.

[0047] Sensor unit 160 includes current sensors 51-53 described above and a terminal block 170 made of an insulating resin material. Relay line 15, first U-phase bus bar 33A to first W-phase bus bar 33C, and second U-phase bus bar 43A to second W-phase bus bar 43C extend from switch modules 24A-44C toward sensor unit 160. These are inserted into terminal block 170.

[0048] Exposed from the terminal block 170 are first output terminals 36 at the ends of the first U-phase bus bar 33A to the first W-phase bus bar 33C, respectively, which are connected to a first cable 91 connected to the power generation motor 4. Exposed from the terminal block 170 are second output terminals 46 at the ends of the second U-phase bus bar 43A to the second W-phase bus bar 43C, respectively, which are connected to a second cable 92 connected to the drive motor 5.

[0049] For ease of explanation, the first U-phase switch module 34A to the first W-phase switch module 34C may be collectively referred to as first switch modules 34A to 34C. The first U-phase bus bar 33A to the first W-phase bus bar 33C may be collectively referred to as first bus bars 33A to 33C. The first bus bars 33A to 33C correspond to first conductive members. The second U-phase bus bar 43A to the second W-phase bus bar 43C may be collectively referred to as second switch modules 44A to 44C. The second U-phase bus bar 43A to the second W-phase bus bar 43C may be collectively referred to as second bus bars 43A to 43C. The second bus bars 43A to 43C correspond to second conductive members.

[0050] The first switch modules 34A to 34C are provided closer to the reactor 23 than the second switch modules 44A to 44C. The first bus bars 33A to 33C are provided closer to the reactor 23 than the second bus bars 43A to 43C. The first output terminal 36 is provided closer to the reactor 23 than the second output terminal 46. As described above, the first bus bars 33A to 33C are connected to the generator motor 4. The second bus bars 43A to 43C are connected to the drive motor 5, which generates more heat than the generator motor 4. Accordingly, the second bus bars 43A to 43C have more heat than the first bus bars 33A to 33C. The second output terminal 46 has more heat than the first output terminal 36.

[0051] The first bus bars 33A to 33C are provided in the order of closest to the reactor 23: the first U-phase bus bar 33A, the first V-phase bus bar 33B, and the first W-phase bus bar 33C. The second bus bars 43A to 43C are provided in the order of closest to the reactor 23: the second U-phase bus bar 43A, the second V-phase bus bar 43B, and the second W-phase bus bar 43C. The shortest distance L1 between one of the first bus bars 33A to 33C and the reactor 23 is shorter than the shortest distance L2 between one of the second bus bars 43A to 43C and the reactor 23. For example, the shortest distance between the first U-phase bus bar 33A and the reactor 23 is shorter than the shortest distance between the second U-phase bus bar 43A and the reactor 23. For example, the shortest distance between the first W-phase bus bar 33C and the reactor 23 is shorter than the shortest distance between the second U-phase bus bar 43A and the reactor 23. The shortest distance is the shortest distance in the thickness direction TD.

[0052] The shortest distance L3 between one of the first output terminals 36 and the reactor 23 is shorter than the shortest distance L4 between one of the second output terminals 46 and the reactor 23. For example, the shortest distance between the first output terminal 36 of the first U-phase bus bar 33A and the reactor 23 is shorter than the shortest distance between the second output terminal 46 of the second U-phase bus bar 43A and the reactor 23. For example, the shortest distance between the first output terminal 36 of the first W-phase bus bar 33C and the reactor 23 is shorter than the shortest distance between the second output terminal 46 of the second U-phase bus bar 43A and the reactor 23.

[0053] <Action and effect> The first bus bars 33A to 33C are connected to the generator motor 4. The second bus bars 43A to 43C are connected to the drive motor 5, which generates more heat than the generator motor 4. Therefore, the heat possessed by the first bus bars 33A to 33C is greater than the heat possessed by the second bus bars 43A to 43C. The heat possessed by the first bus bars 33A to 33C refers to the heat transferred from the generator motor 4. The heat possessed by the second bus bars 43A to 43C refers to the heat transferred from the drive motor 5. The shortest distance L1 between one of the first bus bars 33A to 33C and the reactor 23 is shorter than the shortest distance L2 between one of the second bus bars 43A to 43C and the reactor 23. The second bus bars 43A to 43C are not arranged closest to the reactor 23. The second bus bars 43A to 43C are configured to be farther from the reactor 23 than the first bus bars 33A to 33C.

[0054] This reduces the heat transferred from the second bus bars 43A to 43C through the air to the reactor 23. Compared to when the second bus bars 43A to 43C are closer to the reactor 23 than the first bus bars 33A to 33C, the heat transferred from the second bus bars 43A to 43C through the air to the reactor 23 is smaller.

[0055] The heat received by the reactor 23 from the second bus bars 43A to 43C is suppressed. The heat received by the reactor 23 is suppressed from becoming excessive. As a result, the amount of current flowing through the reactor 23 can be secured, which is expected to improve drivability. Furthermore, it is possible to shorten the distance between the power module 140 and the reactor 23 in the width direction WD. As a result, it is possible to reduce the size of the electric component 10.

[0056] First output terminals 36 connected to the power generation motor 4 are provided on the terminal block 170 at the ends of the first U-phase bus bar 33A to the first W-phase bus bar 33C. Second output terminals 46 connected to the drive motor 5 are provided on the terminal block 170 at the ends of the second U-phase bus bar 43A to the second W-phase bus bar 43C.

[0057] The heat generated by the second output terminal 46 is greater than the heat generated by the first output terminal 36. The shortest distance L3 between one of the first output terminals 36 and the reactor 23 is shorter than the shortest distance L4 between one of the second output terminals 46 and the reactor 23. The second output terminal 46 is not arranged closest to the reactor 23. The second output terminal 46 is arranged farther from the reactor 23 than the first output terminal 36.

[0058] This reduces the heat transferred from the second output terminal 46 to the reactor 23 through the air. Compared to when the second output terminal 46 is closer to the reactor 23 than the first output terminal 36, the heat transferred from the second output terminal 46 to the reactor 23 through the air is smaller.

[0059] Seven switch modules 24A to 44C are housed in seven spaces provided in the cooler 100 to form the power module 140. In the housing space 157, the power module 140 and the reactor 23 are arranged side by side in the thickness direction TD. In the direction from the reactor 23 toward the switch modules 24A to 44C, the supply port 110A and the discharge port 130A are provided at positions farther from the reactor 23 than the switch modules 24A to 44C.

[0060] The first switch modules 34A to 34C and the second switch modules 44A to 44C are arranged in order from the gap closest to the reactor 23. The refrigerant supplied from the supply port 110A flows inside the supply pipe 110 toward the reactor 23. The refrigerant flowing into the supply pipe 110 flows into each relay pipe 120 and then into the discharge pipe 130. The refrigerant then flows inside the discharge pipe 130 toward the discharge port 130A, away from the reactor 23. This makes it difficult for the temperature of the refrigerant to rise in the flow path on the supply port 110A and discharge port 130A sides, where the distance from the supply port 110A to the discharge port 130A is short. This makes it possible to efficiently cool the second switch modules 44A to 44C. The amount of heat that the reactor 23 receives from the second bus bars 43A to 43C is reduced.

[0061] (Second embodiment) FIG. 4 is a plan view of a second embodiment of the electrical component. The electrical component 10 in the second embodiment includes a thermal insulator 180. As an example, the thermal insulator 180 is urethane. In the second embodiment, the thermal insulator 180 is provided between the power module 140 and the reactor 23. More specifically, at least a portion of the thermal insulator 180 is provided on the shortest path connecting the second bus bars 43A to 43C and the reactor 23. This allows the heat received by the reactor 23 from the second bus bars 43A to 43C to be efficiently suppressed. Note that the shortest path is not shown in FIG. 4 because it is the same as in the first embodiment.

[0062] (Third embodiment) Fig. 5 is a plan view of a third embodiment of the electrical component. In the third embodiment, a heat insulating material 180 is provided between the power module 140 and the terminal block 170. More specifically, at least a portion of the heat insulating material 180 is provided on the shortest path connecting the second output terminals 46 of the second bus bars 43A to 43C and the reactor 23. This makes it possible to efficiently suppress the heat that the reactor 23 receives from the second output terminals 46. In Fig. 5, the shortest path is omitted because it is the same as in the first embodiment.

[0063] (Fourth embodiment) In the first to third embodiments, the A-phase switch module 24A is described as being farthest from the reactor 23 among the switch modules 24A to 44C. However, the arrangement of the A-phase switch module 24A is not limited to the above arrangement. FIG. 6 is a plan view of a fourth embodiment of the electrical component. As an example, in the fourth embodiment, the A-phase switch module 24A is arranged closest to the reactor 23 among the switch modules 24A to 44C. This increases the shortest distance L2 between one of the second bus bars 43A to 43C and the reactor 23. It also increases the shortest distance L4 between one of the second output terminals 46 and the reactor 23. It is possible to efficiently suppress the heat received by the reactor 23 from the second bus bars 43A to 43C. It is possible to efficiently suppress the heat received by the reactor 23 from the second output terminal 46.

[0064] (Other embodiments) In the first to fourth embodiments, the first inverter 30 and the second inverter 40 each have a three-phase switch module. However, the switch modules included in the first inverter 30 and the second inverter 40 are not limited to three-phase. The switch modules included in the first inverter 30 and the second inverter 40 may be six-phase, nine-phase, or the like. Furthermore, the type of the switch module included in the boost converter 20 is not limited to one-phase. The boost converter 20 may have a plurality of switch modules.

[0065] Although the present disclosure has been described with reference to the embodiments, it is understood that the present disclosure is not limited to the embodiments or structures. The present disclosure also encompasses various modifications and modifications within the scope of equivalents. In addition, although various combinations and forms are shown in the present disclosure, other combinations and forms including only one element, more, or less are also within the scope and spirit of the present disclosure. [Explanation of symbols]

[0066] 23 reactor, 30 first inverter, 33A, 33B, 33C first conductive member, 34A, 34B, 34C first switch module, 36 first output terminal, 4 first heat-generating component, 40 second inverter, 43A, 43B, 43C second conductive member, 44A, 44B, 44C second switch module, 46 second output terminal, 5 second heat-generating component, 91 first cable, 92 second cable, 100 cooler, 110 supply pipe, 110A supply port, 120 relay pipe, 130 discharge pipe, 130A discharge port, 170 terminal block, 180 insulation material, TD direction, WD width direction, L1 shortest distance, L2 shortest distance, L3 shortest distance, L4 shortest distance.

Claims

1. A reactor (23), a first switch module (34A, 34B, 34C) connected to an external first heat-generating component (4); a second switch module (44A, 44B, 44C) connected to a second heat generating component (5) that generates more heat than the first heat generating component; a first conductive member (33A, 33B, 33C) connecting the first heat generating component and the first switch module; a second conductive member (43A, 43B, 43C) connecting the second heat generating component and the second switch module, a shortest distance (L1) between the first conductive member and the reactor is shorter than a shortest distance (L2) between the second conductive member and the reactor, The power supply further includes a heat insulating material (180) provided between the first switch module and the reactor, An electrical component in which at least a portion of the heat insulating material is provided on the shortest path connecting the second conductive member and the reactor.

2. 2. The electrical component according to claim 1, wherein the second conductive member has a higher heat capacity than the first conductive member.

3. 3. The electrical component according to claim 2, wherein the reactor, the first switch module, and the second switch module are arranged in the order of the reactor, the first switch module, and the second switch module in relation to the arrangement direction (TD) in which the first switch module and the second switch module are arranged.

4. A terminal block (170) supporting the first conductive member and the second conductive member is further provided. The terminal block is arranged next to the first switch module and the second switch module in a width direction (WD) perpendicular to the arrangement direction, 4. The electrical component according to claim 3, wherein the first conductive member and the second conductive member extend toward the terminal block.

5. a first output terminal (36) which is a terminal connected to a first cable (91) connected to the first heat-generating component in the first conductive member, and a second output terminal (46) which is a terminal connected to a second cable (92) connected to the second heat-generating component in the second conductive member, are provided on the terminal block; 5. The electrical component according to claim 4, wherein a shortest distance (L3) between the first output terminal and the reactor is shorter than a shortest distance (L4) between the second output terminal and the reactor.

6. A reactor (23), a first switch module (34A, 34B, 34C) connected to an external first heat-generating component (4); a second switch module (44A, 44B, 44C) connected to a second heat generating component (5) that generates more heat than the first heat generating component; a first conductive member (33A, 33B, 33C) connecting the first heat generating component and the first switch module; a second conductive member (43A, 43B, 43C) connecting the second heat generating component and the second switch module, a shortest distance (L1) between the first conductive member and the reactor is shorter than a shortest distance (L2) between the second conductive member and the reactor, A terminal block (170) supporting the first conductive member and the second conductive member is further provided. the terminal block is arranged next to the first switch module and the second switch module in a width direction (WD) perpendicular to an arrangement direction (TD) in which the first switch module and the second switch module are arranged, the first conductive member and the second conductive member extend toward the terminal block; The electrical component further comprises a heat insulator (180) disposed between the first switch module and the terminal block.

7. 7. The electrical component according to claim 6, wherein the second conductive member has a higher heat capacity than the first conductive member.

8. An electrical component as described in Claim 7, wherein, with respect to the arrangement direction, the reactor, the first switch module, and the second switch module are arranged in the order of the reactor, the first switch module, and the second switch module.

9. A reactor (23), a first switch module (34A, 34B, 34C) connected to an external first heat-generating component (4); a second switch module (44A, 44B, 44C) connected to a second heat generating component (5) that generates more heat than the first heat generating component; a first conductive member (33A, 33B, 33C) connecting the first heat generating component and the first switch module; a second conductive member (43A, 43B, 43C) connecting the second heat generating component and the second switch module, a shortest distance (L1) between the first conductive member and the reactor is shorter than a shortest distance (L2) between the second conductive member and the reactor, the heat generated by the second conductive member is greater than the heat generated by the first conductive member; the reactor, the first switch module, and the second switch module are arranged in the order of the reactor, the first switch module, and the second switch module in an arrangement direction (TD) in which the first switch module and the second switch module are arranged, A terminal block (170) supporting the first conductive member and the second conductive member is further provided. The terminal block is arranged next to the first switch module and the second switch module in a width direction (WD) perpendicular to the arrangement direction, the first conductive member and the second conductive member extend toward the terminal block; a first output terminal (36) which is a terminal connected to a first cable (91) connected to the first heat-generating component in the first conductive member, and a second output terminal (46) which is a terminal connected to a second cable (92) connected to the second heat-generating component in the second conductive member, are provided on the terminal block; a shortest distance (L3) between the first output terminal and the reactor is shorter than a shortest distance (L4) between the second output terminal and the reactor; The electrical component further comprises a heat insulator (180) disposed between the first switch module and the terminal block.

10. a cooler (100) through which a refrigerant for cooling the first switch module and the second switch module flows, The cooler includes a supply pipe (110) having a supply port (110A) through which the refrigerant is supplied and extending in the arranging direction, a discharge pipe (130) having a discharge port (130A) through which the refrigerant is discharged and extending in the arranging direction, and a plurality of relay pipes (120) that relay the supply pipe and the discharge pipe and are arranged in the arranging direction, the first switch module and the second switch module are individually provided between two of the relay pipes adjacent to each other in the arrangement direction, 10. The electrical component according to claim 3, wherein the supply port and the discharge port are provided on a side of the second switch module opposite to a side on which the first switch module is disposed in the arrangement direction.

11. a plurality of the first switch modules; a plurality of the second switch modules; A first inverter (30) is configured by a plurality of the first switch modules, The electrical component according to any one of claims 1 to 9, wherein a second inverter (40) is formed by a plurality of the second switch modules.

12. the first heat-generating component is a power generating motor that generates power for driving a drive motor, 10. The electric component according to claim 1, wherein the second heat-generating component is the drive motor having a driving force for running a vehicle.

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