JP5381181B2 - Mechanical and electric integrated drive - Google Patents

Description

  The present invention relates to an electromechanical integrated drive device in which an inverter for converting a direct current into a multiphase alternating current is integrally mounted on a multiphase alternating current motor.

  As a conventional electromechanical integrated drive device, for example, as in Patent Document 1, a configuration including an inverter that converts a DC output of a DC power source into an AC output, and an AC motor that is rotationally driven by the AC output of the inverter A power driver that outputs the AC output of each phase of the AC output of the inverter is disposed around the stator of the AC motor, and the power driver is divided into the same number as the number of stator cores. 2. Description of the Related Art An output terminal for the AC output of each phase of the power driver that is connected to a stator coil that is in the most recent phase is known.

Japanese Patent No. 3559909

  However, in such an electromechanical integrated drive device, when one power module of each phase is switched, a resonance current is generated between a plurality of capacitors existing in different bus bars, so that switching loss increases. Tend to.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an electromechanical integrated drive device capable of reducing the resonance current by reducing the number of capacitors connected to each bus bar wiring.

  In order to achieve this object, an electromechanical integrated drive device according to the present invention includes a multiphase AC motor provided with a plurality of drive coils to which a plurality of alternating currents having different phases are supplied for each phase, and a positive side of a DC power supply. And a DC supply bus bar having a positive bus bar and a negative bus bar connected to the negative side, respectively. The electromechanical drive unit is connected between the positive bus bar and the negative bus bar, converts a DC output from the DC power source to a multi-phase AC output, and converts the AC output of each phase. Are supplied to the drive coils of the respective phases. In addition, the DC supply bus bar includes a plurality of divided DC supply bus bars provided corresponding to the phases, and a power module group including two or more sets of the power modules. The plurality of divided DC supply bus bars are provided in the same number as the number of the plurality of power module groups and are stacked on each other.

  According to this configuration, the resonance current can be reduced by reducing the number of capacitors connected on each bus bar wiring.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic front view of an electromechanical integrated drive device (rotating electric machine) showing Example 1 of the first embodiment of the present invention. FIG. 2 schematically shows a cross section taken along line A1-A1 of the three-phase AC motor 1 shown in FIG. 1; It is explanatory drawing which shows the relationship between the stator of FIG. 2, and the power module of each phase. It is a schematic wiring diagram which shows the wiring of the power module of FIG. 3, and a some bus bar. FIG. 5 is an explanatory diagram of a U-phase bus bar in FIG. 4. It is explanatory drawing of the V-phase bus bar of FIG. FIG. 5 is an explanatory diagram of a W-phase bus bar in FIG. 4. FIG. 5 is an explanatory diagram showing a positional relationship between a power module, a bus bar substrate, and a capacitor when the bus bars of each phase in FIG. 4 are stacked. It is arrangement | positioning explanatory drawing which shows the positional relationship of the terminal of a capacitor | condenser of FIG. 8, and a bus bar board | substrate. FIG. 5 is an explanatory diagram showing the positional relationship between the capacitor and the switch driver in FIG. It is a schematic perspective view which shows the arrangement | sequence of the bus bar board | substrate of FIG. 8, and a capacitor | condenser. It is sectional drawing which shows the connection relation of the U-phase power module of FIG. 8A, and a bus bar. It is sectional drawing which shows the connection relation of the V-phase power module of FIG. 8A, and a bus bar. It is sectional drawing which shows the connection relation of the W-phase power module of FIG. 8A, and a bus bar. It is sectional drawing which shows the connection relation of the U-phase capacitor | condenser of FIG. 8A, and a bus bar. It is sectional drawing which shows the connection relation of the V-phase capacitor | condenser of FIG. 8A, and a bus bar. It is sectional drawing which shows the connection relation of the W-phase capacitor | condenser of FIG. 8A, and a bus bar. It is explanatory drawing which shows the connection relation of the bus bar board | substrate of each layer which has a bus bar of FIG. 4, and DC power supply. It is explanatory drawing which shows the other example of the connection relation of the bus bar board | substrate of each layer which has a bus bar of FIG. 4, and DC power supply. It is explanatory drawing which shows the further another example of the connection relation of the bus bar board | substrate of each layer which has a bus bar of FIG. 4, and DC power supply. FIG. 5 is a switching characteristic diagram of an inverter including the power module, the capacitor, and the bus bar of FIG. 4. It is explanatory drawing which shows 2nd Example of this invention. It is explanatory drawing which shows the connection relation of the bus bar of FIG. 19, and a capacitor | condenser. It is explanatory drawing which shows the other example of the connection relation of the bus bar of FIG. 19, and a capacitor | condenser. FIG. 20 is a schematic perspective view showing an arrangement of bus bar substrates and capacitors of FIG. 19. It is explanatory drawing of the resonant current at the time of U-phase switching of the inverter which has the arrangement | sequence of the capacitor | condenser of FIG. It is explanatory drawing of the resonance current of the whole inverter which has the arrangement | sequence of the capacitor | condenser of FIG. It is explanatory drawing of the resonance current in the case of one 500 A current source. It is explanatory drawing at the time of comparing the resonance current of the inverter which has the arrangement | sequence of the capacitor | condenser of FIG. 20B with the resonance current of FIG. 20C. FIG. 20 is a schematic perspective view showing a relationship between the bus bar substrate of FIG. 19 and its exploded perspective view.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic front view of an electro-mechanical integrated drive device (rotary electric machine) showing Example 1 of the first embodiment of the present invention. In FIG. 1, 1 is a three-phase AC motor (multi-phase AC motor), and 2 is an inverter (power converter).
<Three-phase AC motor 1>
A three-phase AC motor 1 which is a rotating electrical machine main body has a motor housing 3. The motor housing 3 includes a cylindrical motor case 4, an end cap 5 that closes one end of the motor case 4, and a disk-shaped (annular and disk-shaped) cooler 6 that closes the other end. I have.
・ Cooling water passage (cooling water flow path)
A cooling water passage (cooling water passage) 4a is formed in the motor case 4 as shown in FIG. 1, and an annular cooling water passage communicating with the cooling water passage (cooling water passage) 4a in the end cap 5 is formed. (Cooling water channel) 5a is formed, and in the cooler 6, an annular cooling water channel (cooling water channel) 6a communicating with the cooling water channel (cooling water channel) 4a is formed. The end cap 5 is provided with a cooling water inlet / outlet pipe 5b communicating with the cooling water passage 5a, and the cooler 6 is provided with a cooling water inlet / outlet pipe 6b communicating with the cooling water passage 6a. The cooling water passage 4a of the motor case 4 is shown only in FIG. 1, and is not shown in FIG.

  The three-phase AC motor 1 includes an annular stator 7 fixed to the inner surface of a motor case 4, a rotor 8 disposed in the stator 7, and a rotor shaft (rotary shaft) provided integrally with the rotor 8. 9

In FIG. 1, the cooling water passage 4a is provided in the motor case 4 to cool the stator 7 that generates heat in the motor case 4, but the cooling water passage 4a is not necessarily provided. In this case, it is not necessary to provide the cooling water passage 5a and the cooling water in / out pipe 5b, and the cooling device 6 may be provided with a cooling water inflow pipe and a cooling water inflow pipe.
・ Stator 7
2 schematically shows a cross section taken along line A1-A1 of the three-phase AC motor 1 shown in FIG. 1 (see FIGS. 3 and 4).

  As shown in FIG. 2, the stator 7 has a U-phase stator component 10, a V-phase stator component 11, and a W-phase stator component 12 arranged in order in the circumferential direction of the motor case 4. Further, when the U-phase stator component 10, the V-phase stator component 11, and the W-phase stator component 12 are made into one stator arrangement set, the stator 7 has three stator arrangements arranged in the circumferential direction of the motor case 4. The sets 7a to 7c are provided.

  Accordingly, three (plural) U-phase stator components 10 are provided, three (plural) V-phase stator components 11 are provided, and three (plural) W-phase stator components 12 are also provided.

  Three (plural) U-phase stator components 10 are arranged at intervals of 120 ° in the circumferential direction of the motor case 4, and three (plural) V-phase stator components 11 are arranged on the motor case 4. The circumferential direction of the motor case 4 is disposed at intervals of 120 °, and the three (plurality) W-phase stator components 12 are disposed at intervals of 120 ° in the circumferential direction of the motor case 4.

  Each U-phase stator component 10 includes a stator core member 10a and a stator coil (U-phase compatible drive coil) 10c wound around a tooth 10b of the stator core member 10a. Reference numerals 10a, 10b, and 10c are displayed on only one of the three U-phase stator components 10, and the other U-phase stator components 10 are omitted.

  Each V-phase stator component 11 includes a stator core member 11a and a stator coil (V-phase compatible drive coil) 11c wound around a tooth 11b of the stator core member 11a. Reference numerals 11a, 11b, and 11c are displayed on only one of the three U-phase stator components 11, and the other V-phase stator components 10 are omitted.

Each W-phase stator component 12 includes a stator core member 12a and a stator coil (W-phase compatible drive coil) 12c wound around a tooth 12b of the stator core member 12a. Reference numerals 12a, 12b, and 12c are displayed on only one of the three U-phase stator components 12, and the other W-phase stator components 12 are omitted.
・ Rotor 8
As shown in FIG. 2, the rotor 8 includes a rotor core 8 a formed by laminating a large number of steel plates, and a permanent magnet 8 b embedded in the rotor core 8.

As described above, the three-phase AC motor 1 according to the present embodiment embeds the permanent magnet 8b in the rotor core 8 and concentrates the embedded magnet motor in which the coils are concentrated and wound around the stator core members 10a, 11a, and 12a of each phase. Is shown as an example.
<Inverter 2>
As shown in FIG. 1, the inverter (power converter) 2 is attached to one end of the motor housing 3 and covered with a cover 2a. The inverter 2 has three power module arrays PM1 to PM3 provided as shown in FIG. 3 corresponding to the three stator arrays 7a to 7c of FIG. 2 described above.

  Each of the power module arrays PM1 to PM3 includes a U-phase power module 13, a V-phase power module 14, and a W-phase power module 15 as a set as shown in FIG.

  Accordingly, the inverter 2 includes three (plural) U-phase power modules 13, three (plural) V-phase power modules 14, and three (plural) W-phase power modules 15.

  The U-phase power module 13, the V-phase power module 14, and the W-phase power module 15 are connected to the DC power supply 16 shown in FIG. The three U-phase power modules 13 are arranged at intervals of 120 ° in the circumferential direction as shown in FIG. 5, and the three V-phase power modules 14 are 120 in the circumferential direction as shown in FIG. The three W-phase power modules 15 are arranged at intervals of 120 ° in the circumferential direction as shown in FIG.

  The U-phase power module 13 has module terminals 13PMT1 and 13PMT2 as shown in FIGS. 8 and 9, and the V-phase power module 14 has module terminals 14PMT1 and 14PMT2 as shown in FIGS. The W-phase power module 15 has module terminals 15PMT1 and 15PMT2 as shown in FIGS. Each of the power modules 13 to 15 is used to convert a DC output from the DC power supply 16 of FIG. 4 into an AC output.

In FIG. 4, a DC bus 17 is connected to the DC power supply 16. The DC bus 17 has a positive side wiring (plus side wiring) 17a connected to the positive side (plus side) and a negative side wiring (minus side wiring) 17b connected to the negative side (minus side).
・ Power module group 13G, 14G, 15G
The three (plural) U-phase power modules 13 shown in FIG. 5 are arranged corresponding to the three stator coils (U-phase compatible drive coils) 10c shown in FIG. 4 to form a U-phase compatible power module group 13G. doing. As shown in FIG. 4, the three U-phase power modules 13 are connected to the three stator coils 10c, respectively, and drive the stator coils 10c to disclose the teeth 10b.

  The three (plurality) of V-phase power modules 14 shown in FIG. 6 are arranged corresponding to the three stator coils (V-phase compatible drive coils) 11c shown in FIG. 4 to form a V-phase compatible power module group 14G. doing. As shown in FIG. 4, the three U-phase power modules 14 are connected to the three stator coils 11c, respectively, and drive the stator coils 11c to field the teeth 11b.

  The three (plurality) W-phase power modules 15 shown in FIG. 7 are arranged corresponding to the three stator coils (W-phase compatible drive coils) 12c shown in FIG. 4 to form a W-phase compatible power module group 15G. doing. As shown in FIG. 4, the three U-phase power modules 15 are connected to the three stator coils 12c, respectively, and drive the stator coils 12c to field the teeth 12b.

Each power module 13, 14, 15 is closely attached and fixed to an annular disk-shaped cooler 6 as shown in FIGS. 8 and 8B, and is a cooling water flowing in the cooling water passage 6 a of the cooler 6. It can be cooled.
・ Phase-compatible bus bar board (divided bus bar board) 18
Further, as shown in FIGS. 8, 8A, and 8B, a multiphase bus bar substrate 18 is disposed on the other end face side of each of the power modules 13, 14, and 15. The phase-corresponding bus bar substrate 18 is formed in an annular shape as shown in FIG. 8C, and as shown in FIG. 9, three (a plurality of) phase-corresponding substrates (divided substrates) 19U, 19V, 19W.

  In addition, as shown in FIG. 9, the phase corresponding substrate 19U is provided with a U phase corresponding DC supply bus bar 20 as a divided DC supply bus bar, and the phase corresponding substrate 19V is supplied with a V phase corresponding DC supply as a divided DC supply bus bar. A bus bar 21 is provided, and a W-phase compatible DC supply bus bar 22 as a divided DC supply bus bar is provided on the phase corresponding substrate 19W.

  As shown in FIG. 4, each of the phase-corresponding DC supply bus bars 20 to 22 is formed in an annular shape, and the above-described three (plural) phase-corresponding power module groups 13G to 15G (FIGS. 5 to 5). 7), that is, three (plural).

  Further, as shown in FIG. 9, the phase-corresponding substrate 19U includes the stacked PCB substrates 19U1 and 19U2, the phase-corresponding substrate 19V includes the stacked PCB substrates 19V1 and 19V2, and the phase-corresponding substrate 19W is the stacked PCB. It has the board | substrate 19W1, 19W2.

  Furthermore, the U-phase-compatible DC supply bus bar 20 is a PN wiring (PN bus bar), and as shown in FIG. 9, a positive bus bar (annular bus bar) 20a that is a P (Positive) wiring formed on the PCB substrate 19U1. And a negative bus bar (annular bus bar) 20b which is N (Negative) wiring formed on the PCB substrate 19U2.

  As shown in FIG. 9, the V-phase-compatible DC supply bus bar 21 is a PN wiring (PN bus bar), and a positive bus bar (annular bus bar) 21a that is a P (Positive) wiring formed on the PCB substrate 19V1. And a negative bus bar (annular bus bar) 21b which is N (Negative) wiring formed on the PCB substrate 19V2.

  As shown in FIG. 9, the W-phase-compatible DC supply bus bar 22 is a PN wiring (PN bus bar), and a positive bus bar (annular bus bar) 22a that is a P (Positive) wiring formed on the PCB substrate 19W1. And a negative bus bar (annular bus bar) 22b which is an N (Negative) wiring formed on the PCB substrate 19W2.

  As shown in FIG. 4, the annular positive bus bars 20 a, 21 a, and 22 a are connected to the positive wiring 17 a of the DC bus 17, and the annular negative bus bars 20 b, 21 b, and 22 b are the negative side of the DC bus 17. It is connected to the wiring 17b.

  Such annular bus bars 20a, 20b, 21a, 21b, 22a, 22b are respectively formed on six (multiple) PCB substrates 19U1, 19U2, 19V1, 19V2, 19W1, 19W2 by etching or the like. Such bus bars 20a, 20b, 21a, 21b, 22a, and 22b can be formed at a lower cost than when formed in an annular shape from a copper thick plate, thereby enabling a reduction in mounting cost.

  Such annular bus bars 20a, 20b, 21a, 21b, 22a, and 22b can be stacked on a single PCB substrate via a number of insulating layers. Also in this case, it can be formed by etching or the like.

  The multi-phase bus bar substrate 18 has through-holes 20c and 20d for attaching a U-phase capacitor terminal as shown in FIG. 12, and corresponds to the U-phase power module 13 as shown in FIG. Through-holes 20e and 20f for mounting the U-phase module terminal are formed. The positive bus bar 20a is exposed in the through holes 20c and 20e, and the negative bus bar 20b is exposed in the through holes 20d and 20f.

  Further, V-phase through holes 21c and 21d for attaching a V-phase capacitor terminal are formed in the multi-phase bus bar substrate 18 as shown in FIG. 13, and a V-phase power module as shown in FIG. Through holes 21e and 21f for V-phase module terminal attachment corresponding to 14 are formed. The positive bus bar 21a is exposed in the through holes 21c and 21e, and the negative bus bar 21b is exposed in the through holes 21d and 21f.

  Further, W-phase through holes 22c and 22d for attaching a W-phase capacitor terminal are formed in the multi-phase bus bar substrate 18 as shown in FIG. 14, and a W-phase power module as shown in FIG. Through-holes 22e and 22f for attaching a W-phase module terminal corresponding to 15 are formed. The positive bus bar 22a is exposed in the through holes 22c and 22e, and the negative bus bar 22b is exposed in the through holes 22d and 22f.

  In addition, as shown in FIG. 9, module terminals 13PMT1 and 13PMT2 of the U-phase power module 13 are inserted into the through holes 20e and 20f corresponding to the U-phase power module 13, respectively. The module terminal 13PMT1 is connected to the positive bus bar 20a by soldering, and the module terminal 13PMT2 is connected to the negative bus bar 20b by soldering.

  As shown in FIG. 10, module terminals 14PMT1 and 14PMT2 of the V-phase power module 14 are inserted into the through holes 21e and 21f corresponding to the V-phase power module 14, respectively. The module terminal 14PMT1 is connected to the positive bus bar 21a by soldering, and the module terminal 14PMT2 is connected to the negative bus bar 21b by soldering.

Furthermore, as shown in FIG. 11, module terminals 15PMT1 and 15PMT2 of the W-phase power module 15 are inserted into the through holes 22e and 22f corresponding to the W-phase power module 15, respectively. The module terminal 15PMT1 is connected to the positive bus bar 22a by soldering, and the module terminal 15PMT2 is connected to the negative bus bar 22b by soldering.
・ Capacitors C1 to C9
Further, the inverter 2 includes first to third (three) capacitor arrays CA1 to CA3 as shown in FIG.

  In each of the capacitor arrays CA1 to CA3, as shown in FIG. 8, the inverter 2 includes three (a plurality) U-phase capacitors C1, C4, C7 made of multilayer ceramic capacitors, and three ( A plurality of V-phase capacitors C2, C5, and C8, and three (a plurality of) W-phase capacitors C3, C6, and C9 made of multilayer ceramic capacitors. The U-phase capacitors C1, C4, C7 are arranged at intervals of 120 ° in the circumferential direction as shown in FIG. 5 and are interposed (mounted) between the positive bus bar 20a and the negative bus bar 20b. ing. The V-phase capacitors C2, C5 and C8 are arranged at intervals of 120 ° in the circumferential direction as shown in FIG. 6, and are interposed (mounted) between the positive bus bar 21a and the negative bus bar 21b. . The W-phase capacitors C3, C6, and C9 are arranged at intervals of 120 ° in the circumferential direction as shown in FIG. 7, and are interposed (mounted) between the positive bus bar 22a and the negative bus bar 22b. .

  Each of the capacitors C1 to C9 suppresses voltage fluctuation on the DC bus 17, and supplies and stores high-frequency charges via power switch elements (not shown) of the power modules 13 to 15 that are switched at high speed. By doing so, the PWM operation is established.

  12, each U-phase capacitor C1, C4, C7 has a U-phase capacitor terminal UCT1, UCT2, and each V-phase capacitor C2, C5, C8 has a V-phase capacitor as shown in FIG. Capacitor terminals VCT1 and VCT2 are provided. As shown in FIG. 14, W-phase capacitors C3, C6 and C9 have W-phase capacitor terminals WCT1 and WCT2, respectively.

  As shown in FIG. 12, the U-phase capacitor terminals UCT1 of the U-phase capacitors C1, C4, C7 are inserted into the through holes 20c and connected to the positive bus bar 20a by soldering. On the other hand, as shown in FIG. 12, the U-phase capacitor terminal UCT2 of each U-phase capacitor C1, C4, C7 is inserted into the through hole 20d and connected to the negative bus bar 20b by soldering.

  As shown in FIG. 13, the V-phase capacitor terminals VCT1 of the V-phase capacitors C2, C5, C8 are inserted into the through holes 21c and are connected to the positive bus bar 21a by soldering. On the other hand, as shown in FIG. 13, the V-phase capacitor terminals VCT2 of the V-phase capacitors C2, C5, C8 are inserted into the through holes 21d and connected to the negative bus bar 21b by soldering.

Further, as shown in FIG. 14, the W-phase capacitor terminal WCT1 of each of the W-phase capacitors C3, C6, C9 is inserted into the through hole 22c and connected to the positive bus bar 22a by soldering. On the other hand, as shown in FIG. 14, the W-phase capacitor terminals WCT2 of the W-phase capacitors C3, C6, C9 are inserted into the through holes 22d and connected to the negative bus bar 22b by soldering.
Switch Driver As shown in FIG. 8B, a switch driver D for driving power switch elements (not shown) in the power modules 13, 14, and 15 is disposed above the capacitors C1 to C9. Yes. The switch driver D is configured to receive a signal for driving a power switch element (not shown) from an external motor controller (not shown).

  Here, each power module 13-15 is equipped with the main drive upper-lower arm power switching element which is not illustrated inside. This main drive upper and lower arm power switching element constitutes an upper and lower arm in order to generate a rectangular wave output voltage that maximizes the input DC voltage value. It consists of a total of four power elements connected to a freewheeling diode. As the input / output power terminals of the main drive upper and lower arm power switching elements, two input DC power terminals and one output terminal are provided in total.

  As described above, in the first embodiment, since the motor is a three-phase AC motor, nine windings of the stator 7 (three stator coils 10c, three stator coils 11c, and three stator coils) are used. 12c).

  In addition, since the inverter 2 is disposed close to the three-phase AC motor 1 through mechanical integration, the three power modules 13 and the three stator coils 10c can be directly connected to each other, and the three power modules 14 and the three stator coils 11c Can be directly connected to each other, and the three power modules 15 and the three stator coils 12c can be directly connected to each other. As a result, there is an advantage that an AC bus bar is unnecessary.

  In this case, each of the three-phase AC phases of U, V, and W is divided into three, and the stator coil of the three-phase AC motor 1 is also divided into three stator coils 10c to 12c for each phase as described above. ing. In addition, as described above, the power module that drives the stator coils 10c to 12c of each phase is also divided into three power modules 13 to 15 of each phase. The stator coils for each phase are also divided into three stator coils 10c to 12c, respectively, and the same number as the stator core members 10a to 12a is provided. However, the three stator coils 10, the three stator coils 11, and the three stator coils 12 are connected in parallel.

  In this embodiment, as described above, the three-phase AC U-phase capacitors are the U-phase capacitors C1, C4, C7, and the three-phase AC V-phase capacitors are the V-phase capacitors C2, C5, C8. The W-phase capacitors are the W-phase capacitors C3, C6, and C9. In this way, the number of capacitors is reduced to 1/3 for each phase, so that the resonance current can be suppressed.

  In addition, the influence of the resonance current increases as the number of terminals of the capacitor for one power module increases. Compared to other capacitors, multilayer ceramic capacitors, in particular, have a small capacitance per volume, and because there is a manufacturing limitation on one size, it is necessary to connect multiple capacitors in parallel. Increase of the resonance current, and consequently increase of the resonance current. Since this resonance current is a high-frequency current, it affects the stable operation of electronic circuit equipment, such as the generation of noise. In addition to the effect that the current handled by one power module becomes 1/3, the absolute value of the resonance current becomes small.

  The PN bus bars stacked as described above are different U-phase-compatible DC supply bus bars 20, V-phase-compatible DC supply bus bars 21, and W-phase-compatible DC supply bus bars 22. Capacitors C1, C4 and C7 are connected, V-phase compatible DC supply bus bar 21 is connected to V-phase capacitors C2, C5 and C8, and W-phase compatible DC supply bus bar 22 is connected to W-phase capacitors C3, C6 and C9. Has been. It is necessary to prevent resonance between these U-phase capacitors C1, C4 and C7, V-phase capacitors C2, C5 and C8, and W-phase capacitors C3, C6 and C9.

  4, the positive bus bar 20a and the negative bus bar 20b of the U-phase compatible DC supply bus bar 20 are provided with external connection terminals 19UT1 and 19UT2, and the positive bus bar 21a and the negative bus bar 21a of the V-phase compatible DC supply bus bar 21 are provided. External connection terminals 19VT1 and 19VT2 are provided on the bus bar 21b, and external connection terminals 19WT1 and 19WT2 are provided on the positive bus bar 22a and the negative bus bar 22b of the W-phase-compatible DC supply bus bar 22.

  Moreover, as shown in FIG. 15, the external connection terminals 19UT1, 19UT2 are provided on the PC board (bus bar board) 19U, the external connection terminals 19VT1, 19VT2 are provided on the PC board (bus bar board) 19V, and the external connection terminal 19WT1. , 19WT2 are provided on a PC board (bus bar board) 19W.

  4 and 15, the external connection terminals 19UT1 and 19UT2 of the U-phase compatible DC bus bar 20 are connected to the positive-side wiring 17a and the negative-side wiring 17b of the DC bus 17, respectively, and the V-phase compatible DC bus bar is connected. 21 external connection terminals 19VT1 and 19VT2 are connected to the positive side wiring 17a and the negative side wiring 17b of the DC bus 17, respectively, and the external connection terminals 19WT1 and 19WT2 of the W-phase compatible DC bus bar 22 are connected to the positive side wiring 17a and the DC side bus 17, respectively. Each is connected to the negative wiring 17b.

  In this way, the U-phase DC bus bar 20, the V-phase DC bus bar 21, the W-phase DC bus bar 22 and the DC power supply 16 are externally connected via the DC bus 17 as shown in FIGS.

  As described above, the positive bus bar 20a and the negative bus bar 20b of the U-phase DC bus bar 20 are connected via the U-phase capacitors C1, C4, C7), and the positive bus bar 21a of the V-phase DC bus bar 21 is connected. And negative bus bar 21b are connected via V-phase capacitors C2, C5, C8), and W-phase capacitors C3, C6, C9 are connected between positive bus bar 22a and negative bus bar 22b of W-phase-compatible DC bus bar 22. Connected through.

  For these U-phase capacitors C1, C4, C7, V-phase capacitors C2, C5, C8, and W-phase capacitors C3, C6, C9, etc., those having a high impedance with a switching frequency band of, for example, 5 to 20 kHz are used. . Thus, high impedance wiring is provided between the positive bus bar 20a (21a, 22a) and the negative bus bar 20b (21b, 22b).

  Further, as shown in FIG. 16, separate DC power supplies may be connected to the bus bars 20 to 22 corresponding to the respective phases. That is, the DC power supply 16 described above is made into a plurality of separate DC power supplies 16U, 16V, 16W, the DC power supply 16U is connected to the external connection terminals 19UT1, 19UT2 via the wirings 16U1, 16U2, and the DC power supply 16V is connected to the wiring 16V1, The DC power supply 16W may be connected to the external connection terminals 19WT1 and 19WT2 via the wirings 16W1 and 16W2, and connected to the external connection terminals 19VT1 and 19VT2 via 16V2.

  Further, as shown in FIG. 17, all of the phase-corresponding bus bars 20 to 22 may be connected in series. That is, the positive side and the negative side of the DC power source 16 are connected to the external connection terminal 19UT1 of the U-phase corresponding DC bus bar 20 and the external connection terminal of the W-phase corresponding DC bus bar 22 via the positive side wiring 17a and the negative side wiring 17b of the DC bus 17. 19 WT 2, the external connection terminal 19 UT 2 of the U-phase compatible DC bus bar 20 and the external connection terminal 19 VT 1 of the V-phase compatible DC bus bar 21 are connected by the wiring 24, and the external connection terminal 19 VT 2 of the V-phase compatible DC bus bar 21 and the W-phase are connected. The external connection terminal 19VT1 of the corresponding DC bus bar 22 may be connected by the wiring 25.

  In this configuration, the positive bus bar 20a and negative bus bar 20b of the U-phase compatible DC bus bar 20, the positive bus bar 21a and negative bus bar 21b of the V-phase compatible DC bus bar 21, and the positive bus bar 22a and negative bus bar 22b of the W-phase compatible DC bus bar 22 are provided. The DC power supply 16 is connected in series.

  In such a configuration, as shown in FIG. 18, the resonance current that occurs near the switching frequency (350 k) and causes noise is suppressed, and the loss of the inverter 2 can be reduced.

  In the first embodiment described above, as shown in FIG. 2, the stator 7 of the three-phase AC motor 1 includes three U-phase stator components 10, three V-phase stator components 11, and three W-phase stator components. It consists of 12 9 pieces in an annular shape. Moreover, an example is shown in which nine power modules, that is, three U-phase power modules 13, three V-phase power modules 14, and three W-phase power modules 15 are provided. However, the three-phase AC motor 1 is not necessarily limited to this.

  For example, the stator 7 can be formed in an annular shape from a total of 15 pieces of five U-phase stator components 10, five V-phase stator components 11, and five W-phase stator components 12. Detailed illustration of this configuration is omitted.

  In this case, the power module includes five U-phase power modules 13 that respectively drive the stator coils 10c of each U-phase stator component 10, and five V-phases that respectively drive the stator coils 11c of each V-phase stator component 11. A total of 15 power modules 14 and five W-phase power modules 15 that respectively drive the stator coils 12c of the respective W-phase stator components 12 are provided. Detailed illustration of this configuration is also omitted.

Further, as shown in FIG. 19, five U-phase capacitors C1, C4, C7, C10, and C13 are provided corresponding to the five U-phase power modules 13, respectively, and corresponding to the five V-phase power modules 14. Five V-phase capacitors C2, C5, C8, C11, and C14 are provided, and five W-phase capacitors C3, C6, C9, C12, and C15 are provided corresponding to the five W-phase power modules 15, respectively. As shown in FIG. 20, the capacitors C1 to C15 are arranged in order in the circumferential direction.
・ Multiphase bus bar substrate 30
As shown in FIG. 21, the multiphase bus bar substrate 30 includes five (multiple) first to fifth multiphase division bus bar substrates 31 to 35. By laminating the five multiphase divided bus bar substrates 31 to 35 shown in FIG. 21, a multiphase bus bar substrate 30 is formed as shown in FIGS.

  In addition, the multi-phase division bus bar substrate 31 includes stacked PCB substrates 31A and 31B, the multi-phase division bus bar substrate 32 includes stacked PCB substrates 32A and 32B, and the multi-phase division bus bar substrate 33 is stacked. It has PCB substrates 33A and 33B, the multi-phase division bus bar substrate 34 has PCB substrates 34A and 34B stacked, and the multi-phase division bus bar substrate 35 has PCB substrates 35A and 35B stacked.

  As shown in FIGS. 19 and 19A, the first to fifth multiphase DC supply bus bars 31D to 35D are provided as divided DC supply bus bars on the multiphase divided bus bar boards 31 to 35 as PN (Positive Negative) bus bars. Is provided.

  This multiphase DC supply bus bar 31D has a positive bus bar 31a which is a P (Positive) bus bar and a negative bus bar 31b which is an N (Negative) bus bar, and the multiphase DC supply bus bar 32D is a positive bus bar 32a which is a P bus bar and an N bus bar. The multi-phase DC supply bus bar 33D has a positive bus bar 33a which is a P bus bar and a negative bus bar 33b which is an N bus bar. The multiphase DC supply bus bar 34D has a positive bus bar 34a which is a P bus bar and a negative bus bar 34b which is an N bus bar, and the multiphase DC supply bus bar 35D is a positive bus bar 35a which is a P bus bar and a negative bus bar 35b which is an N bus bar. Have Each of the positive bus bars 31a to 35a is formed by etching or the like on each of the five (plural) PCB substrates 31A to 35A, and each of the negative bus bars 31b to 35b is etched on each of the five (plural) PCB substrates 31B to 35B. Etc., respectively.

  Further, as shown in FIGS. 19 and 19A, a U-phase capacitor C1, a V-phase capacitor C11, and a W-phase capacitor C6 are connected between the positive bus bar 31a and the negative bus bar 31b of the first multiphase DC supply bus bar 31D. A U-phase capacitor C10, a V-phase capacitor C5, and a W-phase capacitor C15 are connected between the positive bus bar 32a and the negative bus bar 32b of the second multiphase DC supply bus bar 32D. Further, a U-phase capacitor C4, a V-phase capacitor C14, and a W-phase capacitor C9 are connected between the positive bus bar 33a and the negative bus bar 33b of the third multiphase DC supply bus bar 33D, and the fourth multiphase DC supply bus bar 34D. A U-phase capacitor C13, a V-phase capacitor C8, and a W-phase capacitor C3 are connected between the positive bus bar 34a and the negative bus bar 34b. Further, a U-phase capacitor C7, a V-phase capacitor C2, and a W-phase capacitor C12 are connected between the positive bus bar 35a and the negative bus bar 35b of the fifth multiphase DC supply bus bar 35D.

  Moreover, as shown in FIGS. 19 and 19A, the power modules 13, 14, and 15 corresponding to the U-phase capacitor C1, the V-phase capacitor C11, and the W-phase capacitor C6 on the first multiphase DC supply bus bar 31D are respectively The first power module group 31G is configured. The power modules 13, 14, and 15 corresponding to the U-phase capacitor C10, V-phase capacitor C5, and W-phase capacitor C15 on the second multiphase DC supply bus bar 32D constitute a second power module group 32G. Furthermore, the power modules 13, 14, and 15 respectively corresponding to the U-phase capacitor C4, the V-phase capacitor C14, and the W-phase capacitor C9 on the third multiphase DC supply bus bar 33D constitute a third power module group 33G. The power modules 13, 14, and 15 corresponding to the U-phase capacitor C13, the V-phase capacitor C8, and the W-phase capacitor C3 on the fourth multiphase DC supply bus bar 34D constitute a fourth power module group 34G. The power modules 13, 14, and 15 corresponding to the U-phase capacitor C7, V-phase capacitor C2, and W-phase capacitor C12 on the fifth multiphase DC supply bus bar 35D constitute a fifth power module group 35G.

  The multiphase bus bar substrate 30 has external connection terminals 30T1 and 30T2 as shown in FIGS. 19A and 20. Moreover, as shown in FIG. 19A, the external connection terminal 30T1 is connected to the positive bus bars 31a to 35a of the multiphase DC supply bus bars 31D to 35D, and the external connection terminal 30T2 is connected to the positive bus bars 31b to 31B of the multiphase DC supply bus bars 31D to 35D. 35b. 4 is connected to the external connection terminal 30T1 and the external connection terminal 30T2.

  In this way, when the U phase, the V phase, and the W phase of the 15 capacitors C1 to C15 are respectively assembled to the five layers of the first to fifth multiphase DC supply bus bars (PN bus bars) 31D to 35D, For example, when five U-phase power modules 13 corresponding to the U-phase capacitors C1, C4, C7, C10, and C13 are simultaneously operated, the distribution of the resonance current is as shown in FIG. 20A. In this case, the current of each power module is 100A. Moreover, in FIG. 20A, the resonance currents of the V-phase capacitors C2, C5, C8, C11, and C14 are between 33.5 and 34.5, and the other capacitors C1, C3, C4, C6, C7, C9, and C10. , C12, C13, C15 are distributed in the vicinity of 33.5.

  In this embodiment, five U-phase power modules 13 corresponding to the U-phase capacitors C1, C4, C7, C10, and C13 are provided, and they correspond to the V-phase capacitors C2, C5, C8, C11, and C14. 20 U-phase power modules 14 and five U-phase power modules 13 corresponding to W-phase capacitors C 3, C 6, C 9, C 12, C 15 are provided, and the resonance current during actual operation is shown in FIG. 20B. As shown in FIG.

  FIG. 20C is an explanatory diagram showing, for comparison with the present embodiment, a resonance current in the case of a three-phase AC motor and three power modules: equivalent to a current of 500 A.

  The resonance current in the case of FIG. 20C is compared with the resonance current of the present embodiment shown in FIG. 20B. In this comparison, it can be seen that in this embodiment, the resonance current is equalized as shown in FIG. 20D and is reduced as a total as compared with the case of FIG. 20C. Since the heat generated by the resonance current is proportional to the square of the current, it can be seen that the loss of the inverter is greatly reduced. In addition, this resonance current is generated in the vicinity of the switching frequency and causes noise.

An oil passage (not shown) for flowing cooling oil into the multi-phase bus bar substrate 30 is formed in an annular shape along the multi-phase bus bar substrate 30 so that the cooling oil is circulated through the oil passage. 31D-35D is cooled and it suppresses that resistance of bus bar 31D-35D changes. In this case, the oil passages may be formed between the multiphase divided bus bar substrates 31 to 35, or may be formed between the PCB substrates 31A, 31B, 32A, 32B, 33A, 33B, 34A, 34B, 35A, and 35B. You may do it. Moreover, the number of oil paths may be one.
(Modification 1)
As shown in FIG. 19B, external connection terminals 31T1 and 31T2 are provided on the multiphase DC supply bus bar 31D, external connection terminals 32T1 and 32T2 are provided on the multiphase DC supply bus bar 32D, and external connection is provided on the multiphase DC supply bus bar 33D. The connection terminals 33T1 and 33T2 may be provided, the external connection terminals 34T1 and 34T2 may be provided on the multiphase DC supply bus bar 34D, and the external connection terminals 35T1 and 35T2 may be provided on the multiphase DC supply bus bar 35D. In this case, the external connection terminals 31T1 to 35T1 are provided on the positive bus bars 31a to 35a, respectively, and the external connection terminals 31T2 to 35T2 are provided on the negative bus bars 31b to 35b, respectively. Then, the external connection terminals 31T1 to 35T1 and the external connection terminals 31T2 to 35T2 may be connected in parallel or in series with the DC power supply, or multiphase DC is used by using the external connection terminals 31T1 to 35T1 and the external connection terminals 31T2 to 35T2. The supply bus bars 31D to 35D may be connected to separate DC power sources.
(Other)
Various variations in the arrangement of the power module and the capacitor are also conceivable. For example, in this case where the capacitors and the power modules are arranged uniformly on the same bus bar, the impedance is equal, and therefore there is an effect that the variation in resonance current is small.

  Furthermore, when the capacitor is brought close to the power module, the effect of suppressing the surge voltage is enhanced.

  In addition, when one capacitor is used, no resonance current is generated in the first place, so that the surge reduction effect is also enhanced. Further, when the power module is brought to one place, the distance to the capacitor is short, and the surge voltage can be suppressed small.

  Among the stacked bus bars, the power module connected to one bus bar is an integral multiple or a divisor of the number of driving phases of the motor. In other words, for example, in the case of a three-phase AC motor, the arrangement of the U phase, the V phase, the other W phase, etc. is inappropriate for one bus bar. Since the current is not balanced, the desired effect cannot be obtained. In this case, the effect of reducing the resonance current cannot be obtained, and the effect of canceling the ripple current generated when the drive current is switched cannot be obtained, so that the required capacitor size is increased.

  However, for example, there is no problem in connecting to one bus bar for each combination in which the currents of the nine-phase AC motors are balanced. For example, the U driving phase is the driving phase of three U1, U2, U3, the V driving phase is the driving phase of three V1, V2, V3, and the W driving phase is the driving phase of three W1, W2, W3. In the case of a nine-phase AC motor, there is a phase difference of every 40 ° in order from U1. Moreover, since the currents of the combinations of U1, U2, U3, U1, V2, and W3 are not balanced, the same drive phase combination may be connected to the same bus bar. In this way, the capacitors used in the entire inverter are separated into a plurality of bus bars and connected to the separated DC bus bars, thereby reducing the number of capacitor terminals arranged on one bus bar and reducing the resonance current. it can.

  As described above, the electromechanically integrated drive device according to the embodiment of the present invention is provided with a plurality of drive coils (10c, 11c, 12c) to which a plurality of alternating currents having different phases are supplied for each phase. DC having a phase AC motor (three-phase AC motor 1) and positive bus bars (20a, 21a, 22a) and negative bus bars (20b, 21b, 22b) connected to the positive side and the negative side of the DC power source (16), respectively. A supply bus bar (20, 21, 22) is provided. In addition, the electromechanical integrated drive device is connected between the positive bus bar (20a, 21a, 22a) and the negative bus bar (20b, 21b, 22b), and outputs a large number of DC outputs from the DC power source (16). And a power module (13, 14, 15) that converts the alternating current output of each phase to the drive coil (10c, 11c, 12c) of each phase. In addition, the DC supply bus bars (20 to 22) include a plurality of divided DC supply bus bars (20 to 22) provided corresponding to the respective phases, and the power modules (13 to 22). 15) includes two or more sets of power module groups (13G to 15G), and the plurality of divided DC supply bus bars (20 to 22) is the same as the number of the plurality of power module groups (13G to 15G). Provided and stacked on each other.

  Thus, in the case where there are three DC supply bus bars indicated by reference numerals 13 to 15, there are three power module groups indicated by reference numerals 13G to 15G. However, when there are five DC supply bus bars indicated by reference numerals 31D to 35D, there are five power module groups indicated by reference numerals 31G to 35G. In the following, for convenience of explanation, the power module group will be described only with the reference numerals of the three cases indicated by reference numerals 13G to 15G, but actually, the case where the power module group is indicated by reference numerals 31G to 35G is also included.

  According to this configuration, the number of capacitors connected on each DC bus bar wiring can be reduced, and the resonance current can be reduced.

  In the electromechanical integrated drive device according to the embodiment of the present invention, the number of the power module groups (13G to 15G) and the divided DC supply bus bars (20 to 22) is equal to the number of the precursor drive coils (10c, 11c, 12c). Of multiples or divisors.

  According to this structure, it can be set as the best structure which can reduce the resonance current of the number of power modules according to a drive coil (10c, 11c, 12c) and the number of bus bars. In other combinations, the currents flowing through the bus bars are not balanced and the ripple current increases.

  Furthermore, in the electromechanical integrated drive device according to the embodiment of the present invention, the capacitors (C1 to C9) connected to the divided DC supply bus bars (20 to 22) are close to the power modules (13 to 15). Connected.

  According to this configuration, the resonance voltage can be reduced and the surge voltage can be suppressed.

  In the electromechanical integrated drive device according to the embodiment of the present invention, capacitors (C1 to C9) connected to the divided DC supply bus bars (20 to 22) are adjacent to the power modules (13, 14, 15). Connected to an electrical intermediate position between.

  According to this configuration, the impedance from each power module to the capacitor is balanced, and variations in resonance current generated in each capacitor can be minimized.

  Moreover, in the electromechanical integrated drive device according to the embodiment of the present invention, one capacitor (C1 to C9) is connected to each of the divided DC supply bus bars (20 to 22).

  According to this configuration, no resonance current is generated. Since the bus bar is divided into a plurality, it is easy to minimize the number of capacitors connected to one bus bar.

  Further, in the electromechanical integrated drive device according to the embodiment of the present invention, each of the divided DC supply bus bars (20 to 22) is connected with high impedance and connected to the DC power source at the terminal end.

  According to this configuration, resonance between capacitors connected on different bus bars can be prevented.

  In the electromechanical integrated drive device according to the embodiment of the present invention, each of the divided DC supply bus bars (20 to 22) is independently connected to the DC power supply (16U, 16V, 16W).

  According to this configuration, it is possible to suppress the resonance current generated between the stacked bus bars.

  Further, in the electromechanical integrated drive device according to the embodiment of the present invention, a plurality of substrates (PCB substrates 19U1, 19U2, 19V1, 19V2, 19W1, respectively) provided with the plurality of divided DC supply bus bars (20-22), respectively. 19W2) is provided in a multilayer structure, and a plurality of through-holes (20c, 21c, 22c) penetrating the plurality of divided DC supply bus bars (20-22) are provided on the bus bar substrate ( 18). Capacitor terminals (UCT1 to WCT2) of the plurality of capacitors (C1 to C9) are respectively inserted into the through holes (20c to 22c) and solder-connected to the divided DC supply bus bars (20 to 22). Has been.

  According to this configuration, it can be configured with a multilayer bus bar such as a PCB that is less expensive to manufacture than a metal thick plate bus bar used in a large-capacity inverter, and a capacitor can be easily connected through a through hole or the like. . In addition, this connection can also be made by soldering, and a plurality of capacitors can be connected at a time, thereby reducing the manufacturing cost.

  Further, in the electromechanical integrated drive device according to the embodiment of the present invention, the power modules (13 to 15) of the respective phases are arranged so that the arrangement order is the same.

  According to this configuration, the power modules of each phase are electrically in the same order on each bus bar as in the U phase, V phase, W phase, U phase, etc., so the inductance between each bus bar The reduction effect can be obtained to the maximum.

1 Three-phase AC motor (multi-phase AC motor)
2 Inverter (Power module)
10c: Stator coil (U-phase compatible drive coil)
11c ... Stator coil (V-phase compatible drive coil)
12c ... Stator coil (W-phase compatible drive coil)
13 ... U phase power module 13G ... U phase compatible power module group 14 ... V phase power module 14G ... V phase compatible power module group 15 ... W phase power module 15G ... W phase Corresponding power module group 16 ... DC power supply 16U ... DC power supply 16V ... DC power supply 16W ... DC power supply 18 ... phase-corresponding bus bar board (divided bus bar board)
19U: PCB substrate 19U1 ... PCB substrate 19U2 ... PCB substrate 19V ... PCB substrate 19V1 ... PCB substrate 19V2 ... PCB substrate 19W ... PCB substrate 19W1 ... PCB substrate 19W2 ..PCB substrate 20 ... U-phase compatible DC supply bus bar (divided DC supply bus bar)
20a ... Positive bus bar 20b ... Negative bus bar 20c ... Through hole 20d ... Through hole 20e ... Through hole 20f ... Through hole 21 ... V-phase compatible DC supply bus bar (divided DC supply) Busba)
21a ... Positive bus bar 21b ... Negative bus bar 21c ... Through hole 21d ... Through hole 21e ... Through hole 21f ... Through hole 22 ... DC supply bus bar corresponding to W phase (divided DC supply) Busba)
22a ... Positive bus bar 22b ... Negative bus bar 22c ... Through hole 22d ... Through hole 22e ... Through hole 22f ... Through hole C1, C4, C7 ... U-phase capacitor UCT1 ... U phase capacitor terminal UCT2 U phase capacitor terminals C2, C5, C8 V phase capacitor VCT1 V phase capacitor terminal VCT2 V phase capacitor terminals C3, C6, C9 W phase Capacitor WCT1 ... W-phase capacitor terminal WCT2 ... W-phase capacitor terminal 30 ... multi-phase bus bar substrate 31 ... first multi-phase divided bus bar substrate 31A ... PCB substrate 31B ... PCB substrate 31D ... First multiphase DC supply bus bar (split DC supply bus bar)
31a ... Positive bus bar 31b ... Negative bus bar 31G ... First power module group 32 ... Second multi-phase division bus bar substrate 32A ... PCB substrate 32B ... PCB substrate 32D ... Second multi-phase DC supply bus bar (split DC supply bus bar)
32a ... Positive bus bar 32b ... Negative bus bar 32G ... Second power module group 33 ... Third multi-phase division bus bar substrate 33A ... PCB substrate 33B ... PCB substrate 33D ... Third multi-phase DC supply bus bar (split DC supply bus bar)
33a ... Positive bus bar 33b ... Negative bus bar 33G ... Third power module group 34 ... Fourth multi-phase division bus bar substrate 34A ... PCB substrate 34B ... PCB substrate 34D ... Fourth multi-phase DC supply bus bar (split DC supply bus bar)
34a ... Positive bus bar 34b ... Negative bus bar 34G ... Fourth power module group 35 ... Fifth multi-phase divided bus bar substrate 35A ... PCB substrate 35B ... PCB substrate 35D ... Fifth multi-phase DC supply bus bar (split DC supply bus bar)
35a ... Positive bus bar 35b ... Negative bus bar 35G ... Fifth power module group C1, C4, C7, C10, C13 ... U-phase capacitors C2, C5, C8, C11, C14 ... V Phase capacitors C3, C6, C9, C12, C15 ... W phase capacitors

Claims (9)

A multi-phase AC motor provided with a plurality of drive coils each supplied with a plurality of alternating currents of different phases,
A DC supply bus bar having a positive bus bar and a negative bus bar respectively connected to the positive side and the negative side of the DC power source;
Connected between the positive bus bar and the negative bus bar, converts the DC output from the DC power source to a multi-phase AC output, and converts the converted AC output of each phase to the driving coil of each phase, respectively. In an electromechanical integrated drive device comprising: a power module to supply;
The DC supply bus bar includes a plurality of divided DC supply bus bars provided corresponding to the respective phases, and
A power module group including two or more sets of the power modules is provided, and the plurality of divided DC supply bus bars are provided in the same number as the plurality of power module groups and stacked on each other. An electromechanical integrated drive. In the electro-mechanically integrated drive device according to claim 1, the electro-mechanically integrated driving the power modules and the number of the divided DC supply bus bars, characterized in that it is constituted as a multiple or submultiple of the number of the ejection driving coil apparatus.   2. The electromechanical integrated drive device according to claim 1, wherein a capacitor connected to each of the divided DC supply bus bars is connected in proximity to each of the power modules.   2. The electromechanical integrated drive device according to claim 1, wherein a capacitor connected to each of the divided DC supply bus bars is connected to an electrical intermediate position between the adjacent power modules. apparatus.   2. The electromechanical integrated drive device according to claim 1, wherein one capacitor is connected to each of the divided DC supply bus bars.   2. The electromechanical integrated drive device according to claim 1, wherein each of the divided DC supply bus bars is connected to the DC power source at a high end and connected to the DC power source at a terminal portion. 3. 2. The electromechanical integrated drive device according to claim 1, wherein each of the divided DC supply bus bars is independently connected to the DC power source.   2. The electromechanical integrated drive device according to claim 1, further comprising a bus bar substrate formed by stacking a plurality of substrates each provided with the plurality of divided DC supply bus bars, and the plurality of divided DC supply bus bars. A plurality of through holes penetrating through the bus bar substrate, and capacitor terminals of the plurality of capacitors are respectively inserted into the through holes and soldered to the divided DC supply bus bars. An electromechanical integrated drive device characterized by the above.   2. The electromechanical integrated drive device according to claim 1, wherein the power modules of the respective phases are arranged in the same order of arrangement.

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