JP7263766B2 - power converter - Google Patents

Description

The disclosure provided herein relates to a power converter having a filter.

2. Description of the Related Art As disclosed in Patent Literature 1, a power conversion device is known in which a converter and heat generating components are mounted on a base plate. The heat-generating components include filter capacitors.

Japanese Patent Application Laid-Open No. 2017-112768

In the power conversion device disclosed in Patent Literature 1, if the converter and the filter capacitor (filter) vibrate separately, there is a risk that an electrical connection failure will occur at an electrical connection portion between the two.

Therefore, an object of the disclosure described in this specification is to provide a power conversion device in which the occurrence of electrical connection failure is suppressed.

One disclosure is a filter (320) in communication with a battery (200);
a converter (330) for converting the voltage of the battery supplied through the filter;
a capacitor unit (350) comprising a smoothing capacitor (351) connected to the battery and a capacitor housing (354) containing the smoothing capacitor;
a circuit bus bar (331, 332) connecting the filter and the converter;
The filter has passive elements (321, 322) connected to the circuit bus bar, a filter housing (327) housing the passive elements, and a resin member (328) fixing the passive elements to the filter housing,
It further has a power bus bar (311, 312) that connects the battery and the passive element,
A circuit bus bar is secured to the filter housing ,
A power bus bar is fixed to the capacitor housing .

One disclosure is a filter (320) in communication with a battery (200);
a converter (330) for converting the voltage of the battery supplied through the filter;
a terminal block (310) comprising power busbars (311, 312) connecting a battery and a filter, and a busbar housing (313) housing the power busbar;
a circuit bus bar (331, 332) connecting the filter and the converter;
The filter has passive elements (321, 322) connected to the power busbar and the circuit busbar, respectively, and a resin member (328) fixing the passive element to the busbar housing,
A circuit busbar is secured to the busbar housing.

One disclosure is a filter (320) in communication with a battery (200);
a converter (330) for converting the voltage of the battery supplied through the filter;
a capacitor unit (350) comprising a smoothing capacitor (351) connected to the battery and a capacitor housing (354) containing the smoothing capacitor;
a circuit bus bar (331, 332) connecting the filter and the converter;
The filter has passive elements (321, 322) connected to the circuit bus bar and a resin member (328) fixing the passive element to the capacitor housing,
A circuit bus bar is secured to the capacitor housing.

One disclosure is a filter (320) in communication with a battery (200);
a converter (330) for converting the voltage of the battery supplied through the filter;
a terminal block (310) comprising power busbars (311, 312) connecting a battery and a filter, and a busbar housing (313) housing the power busbar;
circuit busbars (331, 332) connecting the filter and the converter;
a capacitor unit (350) comprising a smoothing capacitor (351) connected to the battery and a capacitor housing (354) containing the smoothing capacitor;
The filter includes passive elements (321, 322) connected to the power busbar and the circuit busbar, respectively, a filter housing (327) containing the passive elements, and a resin member (328) fixing the passive elements to the filter housing. have
The filter housing and circuit busbar are each fixed to a busbar housing or a capacitor housing.

Thus, the passive elements (321, 322) and the circuit busbars (331, 332) are fixed to the housing. Therefore, separate vibration of the passive elements (321, 322) and the circuit busbars (331, 332) is suppressed. Stress application to the connection points between the passive elements (321, 322) and the circuit busbars (331, 332) is suppressed. This suppresses the occurrence of electrical connection failures at the connecting portions between the passive elements (321, 322) and the circuit busbars (331, 332).

It should be noted that the reference numbers in parentheses above merely indicate the correspondence with the configurations described in the embodiments described later, and do not limit the technical scope in any way.

1 is a block diagram showing a schematic configuration of an in-vehicle system; FIG. It is a schematic diagram which shows schematic structure of a power converter device. It is a sectional view showing a fixed state of a filter of a power converter concerning a 1st embodiment. It is a top view which shows the fixed state of the power supply bus bar and the circuit bus bar in 1st Embodiment. It is a sectional view showing a fixed state of a filter of a power converter concerning a 2nd embodiment. It is a top view which shows the fixed state of the power supply bus bar and the circuit bus bar in 2nd Embodiment. It is a sectional view showing a fixed state of a filter of a power converter concerning a 3rd embodiment. It is a top view which shows the fixed state of the power supply bus bar and the circuit bus bar in 3rd Embodiment. It is a sectional view showing a fixed state of a filter of a power converter concerning a 4th embodiment. It is a top view which shows the fixed state of the power supply bus bar and the circuit bus bar in 4th Embodiment.

Embodiments will be described below with reference to the drawings.

(First embodiment)
<In-vehicle system>
First, based on FIG. 1, the vehicle-mounted system 100 provided with the power converter 300 will be described. This in-vehicle system 100 constitutes a system for an electric vehicle. In-vehicle system 100 has battery 200 , power converter 300 , and motor 400 .

In-vehicle system 100 also has a plurality of ECUs. These multiple ECUs transmit and receive signals to and from each other via bus wiring. A plurality of ECUs cooperate to control the electric vehicle. Power running and regeneration of motor 400 according to the SOC of battery 200 are controlled by a plurality of ECUs. FIG. 1 shows the MGECU 340 as a representative of the plurality of ECUs. MGECU 340 is included in power converter 300 . SOC is an abbreviation for state of charge. ECU is an abbreviation for electronic control unit.

Battery 200 has a plurality of secondary batteries. These secondary batteries constitute a battery stack connected in series. The SOC of this battery stack corresponds to the SOC of battery 200 . A lithium-ion secondary battery, a nickel-hydrogen secondary battery, an organic radical battery, or the like can be used as the secondary battery.

The power conversion device 300 converts power between the battery 200 and the motor 400 . At the same time, the power conversion device 300 steps down the DC power of the battery 200 . The power conversion device 300 supplies the stepped-down DC power to vehicle-mounted equipment such as the MGECU 340 that consumes less power than the motor 400 .

Motor 400 is connected to an output shaft of an electric vehicle (not shown). The rotational energy of motor 400 is transmitted to the running wheels of the electric vehicle via the output shaft. Conversely, the rotational energy of the running wheels is transmitted to motor 400 via the output shaft.

The motor 400 is driven by AC power supplied from the power converter 300 . As a result, a driving force is applied to the running wheels. Also, the motor 400 is regenerated by rotational energy transmitted from the running wheels. AC power is thereby generated in the motor 400 .

<Power converter>
Next, the power conversion device 300 will be described. As shown in FIGS. 1 and 2 , power converter 300 has terminal block 310 , filter 320 , converter 330 and MGECU 340 . The power converter 300 also has a first capacitor unit 350 , a second capacitor unit 360 , an inverter 370 and a case 380 . Case 380 houses terminal block 310 , filter 320 , converter 330 , MGECU 340 , first capacitor unit 350 , second capacitor unit 360 , and inverter 370 . These stored items are fixed to the case 380 with bolts or the like.

As simply shown in FIG. 2 , the case 380 has a housing 381 and a connecting wall 382 connected to the inner wall of the housing 381 . A material for forming the housing 381 and the connecting wall 382 is a metal such as aluminum.

The connecting wall 382 is formed with a channel for flowing the coolant. On this connection wall 382, among the constituent elements of the power conversion device 300, those that are particularly prone to heat generation are mounted. Specifically, converter 330 , first capacitor unit 350 , second capacitor unit 360 , inverter 370 and the like are mounted on connecting wall 382 . A configuration in which the MGECU 340 is mounted on the connecting wall 382 can also be adopted. Other components are appropriately secured to housing 381 . In FIG. 2, the second capacitor unit 360 is illustrated overlapping with other components.

Converter 330 steps down the DC power supplied from battery 200 according to the voltage required by onboard equipment such as MGECU 340 . Inverter 370 converts the DC power of battery 200 into AC power. This AC power is supplied to the motor 400 . Inverter 370 also converts AC power generated by motor 400 into DC power. The electrical connection configuration of the power converter 300 will be described below.

<Electrical Connection Configuration of Power Converter>
As shown in FIG. 1 , the terminal block 310 has a first power busbar 311 and a second power busbar 312 . A first power busbar 311 is connected to the positive terminal of the battery 200 . A second power bus bar 312 is connected to the negative terminal of the battery 200 .

The filter 320 has a first coil 321 and a second coil 322 as passive elements for removing electromagnetic noise. The first coil 321 and the second coil 322 are magnetically coupled. These two coils constitute a common mode noise filter.

The first coil 321 has two terminals. An extension bus bar is welded to these two terminals to extend the length of the terminals. Specifically, the first extension bus bar 323 is welded to one of the two terminals of the first coil 321 . A second extension bus bar 324 is welded to the other of the two terminals of the first coil 321 . These first extension bus bar 323 and second extension bus bar 324 may not be connected to the first coil 321 .

The first power bus bar 311 is mechanically and electrically connected to the first extension bus bar 323 . The first circuit bus bar 331 is mechanically and electrically connected to the second extension bus bar 324 .

The second coil 322 has two terminals. These two terminals are also welded with extension bus bars for extending the length of the terminals. Specifically, the third extension bus bar 325 is welded to one of the two terminals of the second coil 322 . A fourth extension bus bar 326 is welded to the other of the two terminals of the second coil 322 . These third extension bus bar 325 and fourth extension bus bar 326 may not be connected to the second coil 322 .

The second power bus bar 312 is mechanically and electrically connected to the third extension bus bar 325 . A second circuit bus bar 332 is mechanically and electrically connected to the fourth extension bus bar 326 .

Converter 330 has a circuit board on which electronic elements are mounted. The first circuit bus bar 331 and the second circuit bus bar 332 are mechanically and electrically connected to this circuit board.

With the electrical connection configuration described above, battery 200 and converter 330 are electrically connected via first coil 321 and second coil 322 that constitute a common mode noise filter. DC power of battery 200 from which noise has been removed by a common mode noise filter is supplied to converter 330 .

Although not shown, the wiring board of converter 330 includes first power wiring electrically connected to first circuit bus bar 331, second power wiring electrically connected to second circuit bus bar 332, and second power wiring. has a third power wiring that has a higher potential than the

The electronic element of converter 330 has legs of one or more phases connected in parallel between the third power line and the second power line. A one-phase leg has two switch elements connected in series between the third power wiring and the second power wiring.

Also, the electronic element of converter 330 has the same number of reactors as the legs. The reactor connects the midpoint between the two switch elements of the one-phase leg and the first power wiring. Two switch elements provided in the leg are PWM-controlled by the ECU and a gate driver (not shown). The DC power supplied from battery 200 is stepped down by this PWM control.

The first capacitor unit 350 has a first capacitor 351 , a first smoothing busbar 352 and a second smoothing busbar 353 . As shown in FIG. 1, the first smooth bus bar 352 is mechanically and electrically connected to the first power bus bar 311 . The second smooth bus bar 353 is mechanically and electrically connected to the second power bus bar 312 . The first smooth bus bar 352 and the first power bus bar 311 may be integrated or separated. The second smooth bus bar 353 and the second power bus bar 312 may be integrated or separated.

The first capacitor 351 is connected between the first smoothing bus bar 352 and the second smoothing bus bar 353 . One of the two electrodes of first capacitor 351 is connected to first smoothing bus bar 352 . The other of the two electrodes of first capacitor 351 is connected to second smoothing bus bar 353 . The first capacitor 351 corresponds to a smoothing capacitor.

The second capacitor unit 360 has a second capacitor 361 , a third smoothing busbar 362 and a fourth smoothing busbar 363 . The third smooth bus bar 362 is mechanically and electrically connected to the first smooth bus bar 352 . The fourth smooth bus bar 363 is mechanically and electrically connected to the second smooth bus bar 353 . The first smooth bus bar 352 and the third smooth bus bar 362 may be integrated or separated. The second smooth bus bar 353 and the fourth smooth bus bar 363 may be integrated or separated.

The second capacitor 361 is connected between the third smoothing bus bar 362 and the fourth smoothing bus bar 363 . One of the two electrodes of the second capacitor 361 is connected to the third smoothing busbar 362 . The other of the two electrodes of second capacitor 361 is connected to fourth smoothing bus bar 363 .

Third smoothing bus bar 362 and fourth smoothing bus bar 363 are mechanically and electrically connected to inverter 370 .

First capacitor 351 , second capacitor 361 , and inverter 370 are electrically connected to battery 200 by the connection configuration described above. DC power of battery 200 is supplied to first capacitor 351, second capacitor 361, and inverter 370, respectively.

Note that the power conversion device 300 does not have to have both the first capacitor unit 350 and the second capacitor unit 360 . A configuration in which the power conversion device 300 has only the first capacitor unit 350 can also be adopted.

Inverter 370 has three or more phase legs connected in parallel between third smoothing bus bar 362 and fourth smoothing bus bar 363 . Each of these three or more phase legs has two switch elements connected in series. A bus bar is connected to the midpoint between these two switch elements. This bus bar is electrically connected to the stator coil of motor 400 . The switching element is PWM-controlled by the ECU and the gate driver. As a result, the DC power supplied from battery 200 is converted into AC power. AC power generated by regeneration (power generation) in motor 400 is converted into DC power.

Inverter 370 of the present embodiment has a cooling body for cooling the plurality of switch elements in addition to the plurality of switch elements described above. The cooling body has a coolant supply pipe, a coolant discharge pipe, and a plurality of relay pipes connecting and relaying the coolant supply pipe and the coolant discharge pipe. Refrigerant flows through these three tubes. Refrigerant flows from the refrigerant supply pipe to the refrigerant discharge pipe via a plurality of relay pipes.

The coolant supply pipe and the coolant discharge pipe extend in the same direction. Each of the plurality of relay pipes extends from the coolant supply pipe toward the coolant discharge pipe. The plurality of relay pipes are spaced apart from each other in the extending direction of the coolant supply pipe and the coolant discharge pipe.

A gap is formed between two adjacent relay pipes. A switch element is provided in this gap. The switch element is in contact with the relay pipe. Heat generated by the switch element is radiated to the coolant through the relay pipe.

IGBTs, MOSFETs, and the like can be employed as the switch elements described so far. Semiconductors such as Si and wide-gap semiconductors such as SiC can be used as materials for forming the switch element.

<Mechanical Connection Configuration of Power Converter>
Next, a mechanical connection configuration of the power conversion device 300 will be described. The terminal block 310 has a busbar housing 313 that accommodates the first power busbar 311 and the second power busbar 312 described above. The busbar housing 313 is made of an insulating resin material. The busbar housing 313 is fixed to the housing 381 with bolts or the like.

The filter 320 has a filter housing 327 that houses the first coil 321 and the second coil 322 described above. Filter housing 327 is made of an insulating resin material. As shown in FIG. 3, the filter housing 327 is fixed to the housing 381 with bolts or the like.

As shown in FIGS. 3 and 4, the filter housing 327 is formed with a locally recessed second recess 327a. A first coil 321 and a second coil 322 are provided in the second recess 327a. The first coil 321 and the second coil 322 are each fixed to the filter housing 327 within the second concave portion 327a by an insulating resin member 328 . At least a part of the first coil 321 and the second coil 322 excluding the welded joints with the bus bars is embedded in the resin member 328 . A first extension bus bar 323 to a fourth extension bus bar 326 extending terminals of the first coil 321 and the second coil 322 are positioned outside the resin member 328 .

As shown in FIG. 4 , the first extension busbar 323 and the first power busbar 311 are mechanically and electrically connected by a first bolt 391 . At the same time, the first extension bus bar 323 and the first power bus bar 311 are mechanically connected (fixed) to the first capacitor housing 354 by first bolts 391 .

The second extension bus bar 324 and the first circuit bus bar 331 are mechanically and electrically connected by a second bolt 392 . At the same time, the second extension bus bar 324 and the first circuit bus bar 331 are fixed to the filter housing 327 by the second bolts 392 .

Similarly, the third extension bus bar 325 and the second power bus bar 312 are mechanically and electrically connected by a third bolt 393 . At the same time, the third extension bus bar 325 and the second power bus bar 312 are fixed to the first capacitor housing 354 with third bolts 393 .

The fourth extension bus bar 326 is mechanically and electrically connected to the second circuit bus bar 332 by a fourth bolt 394 . At the same time, the fourth extension bus bar 326 and the second circuit bus bar 332 are fixed to the filter housing 327 with fourth bolts 394 . In FIG. 1, the first to fourth bolts 391 to 394 are indicated by white circles.

A configuration in which the extension bus bar and the power bus bar are connected by bolts and partially joined mechanically and electrically by welding or the like can also be adopted. In this case, the extension bus bar and the power bus bar may not be electrically connected by bolts.

Similarly, it is possible to employ a configuration in which the extension bus bar and the circuit bus bar are connected by bolts and partially mechanically and electrically joined by welding or the like. In this case, the extension bus bar and the circuit bus bar do not have to be electrically connected by bolts.

The first capacitor unit 350 has a first capacitor housing 354 that accommodates the first capacitor 351 , first smoothing bus bar 352 and second smoothing bus bar 353 described above. The first capacitor housing 354 is made of an insulating resin material. A part of each of the first smoothing bus bar 352 and the second smoothing bus bar 353 is insert-molded in the first capacitor housing 354 . The first capacitor housing 354 is fixed to the connecting wall 382 with bolts or the like. Further, as described above, in the present embodiment, the first extension bus bar 323 and the first power bus bar 311, and the third extension bus bar 325 and the second power bus bar 312 are bolted to the first capacitor housing 354, respectively.

Like the first capacitor unit 350, the second capacitor unit 360 also has a second capacitor housing 364 made of an insulating resin material. As schematically shown in FIG. 2, the second capacitor unit 360 is larger than the first capacitor unit 350 .

Because of the circuit configuration shown in FIG. 1, the second capacitor unit 360 is more likely to be arranged farther from the terminal block 310 than the first capacitor unit 350 is. Therefore, the first extension bus bar 323 and the third extension bus bar 325 are bolted to the first capacitor housing 354 instead of the second capacitor housing 364 .

<Effect>
Next, the effects of the power conversion device 300 will be described. First coil 321 and second coil 322 are secured to filter housing 327 as described above. A first circuit bus bar 331 and a second circuit bus bar 332 connected to the first coil 321 and the second coil 322 are respectively fixed to the filter housing 327 .

Therefore, the first coil 321 and the first circuit bus bar 331 are prevented from vibrating separately due to an external force such as vibration of the vehicle. Similarly, separate vibration of the second coil 322 and the second circuit bus bar 332 is suppressed. As a result, application of stress to the connecting portion between the first coil 321 and the first circuit bus bar 331 and the connecting portion between the second coil 322 and the second circuit bus bar 332 is suppressed. It is possible to suppress the occurrence of electrical connection failure at the connection portion between these coils and the circuit bus bar.

First coil 321 and second coil 322 are secured to filter housing 327 as described above. A first power bus bar 311 connected to the first coil 321 and a second power bus bar 312 connected to the second coil 322 are each fixed to the first capacitor housing 354 . Filter housing 327 and first capacitor housing 354 are each fixed to case 380 .

In this manner, the filter housing 327 and the first capacitor housing 354 are indirectly connected via the case 380 . Therefore, the first coil 321 and the first power bus bar 311 are prevented from vibrating separately due to an external force such as vibration of the vehicle. Similarly, separate vibration of the second coil 322 and the second power bus bar 312 is suppressed. As a result, application of stress to the connecting portion between the first coil 321 and the first power bus bar 311 and the connecting portion between the second coil 322 and the second power bus bar 312 is suppressed. It is possible to suppress the occurrence of electrical connection failure at the connecting portion between these coils and the power bus bar.

In addition, in order to more effectively suppress the separate vibration of the coil and the power bus bar, it is also possible to employ a configuration in which the filter housing 327 and the first capacitor housing 354 are directly connected by fitting or the like. can. The form of connection between the two is not particularly limited.

In this embodiment, the first power bus bar 311 and the second power bus bar 312 are fixed to the first capacitor housing 354 respectively. However, a configuration in which each of the first power bus bar 311 and the second power bus bar 312 is fixed to the filter housing 327 can also be adopted. A configuration in which each of the first power bus bar 311 and the second power bus bar 312 is fixed to the bus bar housing 313 can also be adopted.

As described above, converter 330 is a circuit board in which electronic elements are mounted on a wiring board. Filter 320 is not mounted on this wiring board. Therefore, the size of the passive elements provided in the filter 320 can be determined regardless of the size and rigidity of the wiring board.

(Second embodiment)
Next, a second embodiment will be described with reference to FIGS. 5 and 6. FIG. The power converters according to the respective embodiments described below have many points in common with those according to the above-described embodiments. Therefore, the description of the common parts will be omitted, and the different parts will be mainly described below. Also, hereinafter, the same reference numerals are given to the same elements as those shown in the above-described embodiment.

In the first embodiment, an example in which the filter 320 has the filter housing 327 and the first coil 321 and the second coil 322 are housed in the filter housing 327 is shown. On the other hand, in this embodiment, the busbar housing 313 accommodates the first coil 321 and the second coil 322 .

As shown in FIGS. 5 and 6, the busbar housing 313 is formed with a locally recessed first recess 313a. A first coil 321 and a second coil 322 are provided in the first recess 313a. The first coil 321 and the second coil 322 are each fixed to the busbar housing 313 by a resin member 328 within the first concave portion 313a.

As shown in FIG. 6 , the first extension bus bar 323 and the first power bus bar 311 are mechanically connected (fixed) to the bus bar housing 313 by first bolts 391 . The second extension bus bar 324 and the first circuit bus bar 331 are fixed to the bus bar housing 313 with second bolts 392 .

Similarly, the third extension bus bar 325 and the second power bus bar 312 are fixed to the bus bar housing 313 by third bolts 393 . The fourth extension busbar 326 and the second circuit busbar 332 are fixed to the busbar housing 313 with fourth bolts 394 .

As described above, each of the first coil 321 and the second coil 322 is fixed to the busbar housing 313 . A first circuit bus bar 331 and a first power bus bar 311 connected to the first coil 321 , and a second circuit bus bar 332 and a second power bus bar 312 connected to the second coil 322 are fixed to the bus bar housing 313 . ing.

Therefore, the first coil 321, the first circuit bus bar 331, and the first power bus bar 311 are prevented from separately vibrating due to an external force such as vibration of the vehicle. Similarly, the second coil 322, the second circuit bus bar 332, and the second power bus bar 312 are suppressed from vibrating separately. As a result, application of stress to the connecting portion between the first coil 321 and the first circuit bus bar 331 and the connecting portion between the first coil 321 and the first power bus bar 311 is suppressed. Stress application to each of the connecting portion between the second coil 322 and the second circuit bus bar 332 and the connecting portion between the second coil 322 and the second power bus bar 312 is suppressed. As a result, it is possible to suppress the occurrence of electrical connection failures at the connecting portion between the coil and the circuit bus bar and at the connecting portion between the coil and the power bus bar.

Note that the power conversion device 300 according to the present embodiment includes components equivalent to those of the power conversion device 300 described in the first embodiment. Therefore, it goes without saying that the same function and effect can be obtained. The same applies to each embodiment and modifications shown below.

(Third embodiment)
Next, a third embodiment will be described with reference to FIGS. 7 and 8. FIG.

In the second embodiment, an example in which the first coil 321 and the second coil 322 are accommodated in the busbar housing 313 is shown. On the other hand, in this embodiment, the first coil 321 and the second coil 322 are accommodated in the first capacitor housing 354 .

As shown in FIGS. 7 and 8, the first capacitor housing 354 is formed with a locally recessed third recess 354a. A first coil 321 and a second coil 322 are provided in the third recess 354a. The first coil 321 and the second coil 322 are each fixed to the first capacitor housing 354 within the third recess 354a by an insulating resin member 328 .

As shown in FIG. 8 , the first extension bus bar 323 and the first power bus bar 311 are mechanically connected (fixed) to the first capacitor housing 354 by first bolts 391 . Second extension bus bar 324 and first circuit bus bar 331 are fixed to first capacitor housing 354 by second bolts 392 .

Similarly, third extension bus bar 325 and second power bus bar 312 are secured to first capacitor housing 354 by third bolts 393 . The fourth extension bus bar 326 and the second circuit bus bar 332 are fixed to the first capacitor housing 354 by fourth bolts 394 .

As described above, first coil 321 and second coil 322 are each fixed to first capacitor housing 354 . A first circuit bus bar 331 and a first power bus bar 311 connected to the first coil 321, and a second circuit bus bar 332 and a second power bus bar 312 connected to the second coil 322 are connected to the first capacitor housing 354. Fixed.

Therefore, in the power conversion device 300 of the present embodiment, similarly to the power conversion device 300 of the second embodiment, electrical The occurrence of poor connection is suppressed.

(Fourth embodiment)
Next, a fourth embodiment will be described with reference to FIGS. 9 and 10. FIG.

In the third embodiment, an example in which the first coil 321 and the second coil 322 are accommodated in the first capacitor housing 354 is shown. On the other hand, in this embodiment, the first coil 321 and the second coil 322 are housed in the filter housing 327 . A filter housing 327 is secured to the first capacitor housing 354 .

The first coil 321 and the second coil 322 are provided in the second concave portion 327a of the filter housing 327 in the same manner as in the first embodiment. The first coil 321 and the second coil 322 are fixed to the filter housing 327 by a resin member 328 within the second recess 327a.

As shown in FIGS. 9 and 10, the filter housing 327 is secured to the first capacitor housing 354 with bolts or the like. The first extension bus bar 323 and the first power bus bar 311 are mechanically connected (fixed) to the first capacitor housing 354 by first bolts 391 . Second extension bus bar 324 and first circuit bus bar 331 are fixed to first capacitor housing 354 by second bolts 392 .

Third extension bus bar 325 and second power bus bar 312 are fixed to first capacitor housing 354 by third bolts 393 . The fourth extension bus bar 326 and the second circuit bus bar 332 are fixed to the first capacitor housing 354 by fourth bolts 394 .

As described above, filter housing 327 containing first coil 321 and second coil 322 is fixed to first capacitor housing 354 . The first circuit bus bar 331 and the first power bus bar 311 , and the second circuit bus bar 332 and the second power bus bar 312 are each fixed to the first capacitor housing 354 .

Therefore, for example, in the same manner as the power conversion device 300 of the third embodiment, in the power conversion device 300 of the present embodiment, electricity The occurrence of typical connection failures is suppressed.

In this embodiment, the filter housing 327 , the first power busbar 311 , the second power busbar 312 , the first circuit busbar 331 , and the second circuit busbar 332 are each fixed to the first capacitor housing 354 . However, a configuration in which filter housing 327 , first power bus bar 311 , second power bus bar 312 , first circuit bus bar 331 , and second circuit bus bar 332 are each fixed to bus bar housing 313 can also be adopted.

Although the preferred embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present disclosure.

(Other modifications)
In each embodiment, an example in which various components of the power conversion device 300 are bolted is shown. The tightening direction of each of these bolts is the same. In particular, the fastening direction of the bolts to the case 380 of the inverter 370 and the fastening directions of the first to fourth bolts 391 to 394 are the same. By making the fastening directions the same, the bolting work is facilitated.

Each embodiment has shown an example in which the power converter 300 is included in the in-vehicle system 100 for an electric vehicle. However, application of the power converter 300 is not particularly limited to the above example. For example, a configuration in which power conversion device 300 is included in a hybrid system that includes a motor and an internal combustion engine can also be adopted.

In each embodiment, the configuration in which the power converter 300 is connected to one motor 400 is shown. However, a configuration in which the power conversion device 300 is connected to two motors 400 can also be adopted. In this case, the power conversion device 300 has two inverters 370 .

DESCRIPTION OF SYMBOLS 100... Vehicle-mounted system 200... Battery 300... Power converter 310... Terminal block 311... First power bus bar 312... Second power bus bar 313... Bus bar housing 313a... First concave portion 320... Filter 321 1st coil 322 2nd coil 327 filter housing 327a 2nd concave portion 328 resin member 330 converter 331 1st circuit bus bar 332 2nd circuit bus bar 350 1st capacitor Unit 351 First capacitor 354 First capacitor housing 354a Third recess 380 Case 400 Motor

Claims (13)

a filter (320) connected to the battery (200);
a converter (330) for converting the voltage of the battery supplied through the filter;
a capacitor unit (350) comprising a smoothing capacitor (351) connected to the battery and a capacitor housing (354) housing the smoothing capacitor;
a circuit bus bar (331, 332) connecting the filter and the converter;
The filter includes passive elements (321, 322) connected to the circuit bus bar, a filter housing (327) housing the passive elements, a resin member (328) fixing the passive elements to the filter housing, has
further comprising a power supply bus bar (311, 312) connecting the battery and the passive element,
The circuit bus bar is fixed to the filter housing ,
The power conversion device , wherein the power bus bar is fixed to the capacitor housing . a case (380 ) for housing the filter, the converter, the circuit bus bar, the power bus bar, and the capacitor unit ;
2. The power conversion device according to claim 1, wherein each of said filter housing and said capacitor housing is fixed to said case. the filter housing is formed with a locally recessed recess (327a),
The passive element is provided in the recess,
3. The power converter according to claim 1, wherein a part of said passive element is embedded in said resin member. a filter (320) connected to the battery (200);
a converter (330) for converting the voltage of the battery supplied through the filter;
a terminal block (310) comprising a power bus bar (311, 312) connecting the battery and the filter, and a bus bar housing (313) housing the power bus bar;
a circuit bus bar (331, 332) connecting the filter and the converter;
The filter has passive elements (321, 322) connected to the power bus bar and the circuit bus bar, respectively, and a resin member (328) fixing the passive element to the bus bar housing,
A power converter, wherein the circuit busbar is fixed to the busbar housing. 5. The power converter according to claim 4, wherein said power busbar is fixed to said busbar housing. The busbar housing is formed with a locally recessed recess (313a),
The passive element is provided in the recess,
6. The power converter according to claim 5, wherein a part of said passive element is embedded in said resin member. a filter (320) connected to the battery (200);
a converter (330) for converting the voltage of the battery supplied through the filter;
a capacitor unit (350) comprising a smoothing capacitor (351) connected to the battery and a capacitor housing (354) housing the smoothing capacitor;
a circuit bus bar (331, 332) connecting the filter and the converter;
The filter has passive elements (321, 322) connected to the circuit bus bar, and a resin member (328) fixing the passive elements to the capacitor housing,
A power converter, wherein the circuit bus bar is fixed to the capacitor housing. having a power supply bus bar (311, 312) connecting the battery and the passive element,
8. The power converter according to claim 7, wherein said power bus bar is fixed to said capacitor housing. said capacitor housing is formed with a locally recessed recess (354a);
The passive element is provided in the recess,
9. The power converter according to claim 7, wherein a part of said passive element is embedded in said resin member. a filter (320) connected to the battery (200);
a converter (330) for converting the voltage of the battery supplied through the filter;
a terminal block (310) comprising a power bus bar (311, 312) connecting the battery and the filter, and a bus bar housing (313) housing the power bus bar;
circuit bus bars (331, 332) connecting the filter and the converter;
a capacitor unit (350) comprising a smoothing capacitor (351) connected to the battery and a capacitor housing (354) containing the smoothing capacitor;
The filter includes passive elements (321, 322) connected to the power bus bar and the circuit bus bar, respectively, a filter housing (327) housing the passive elements, and a resin member fixing the passive elements to the filter housing. (328) and
The power conversion device, wherein the filter housing and the circuit busbar are fixed to the busbar housing or the capacitor housing, respectively. 11. The power converter according to claim 10, wherein the power bus bar is fixed to the bus bar housing or the capacitor housing together with the filter housing and the circuit bus bar, respectively. the filter housing is formed with a locally recessed recess (327a),
The passive element is provided in the recess,
12. The power converter according to claim 10, wherein a part of said passive element is embedded in said resin member. the filter is a common mode noise filter,
A power converter according to any one of claims 1 to 12, wherein said passive element comprises a first coil (321) and a second coil (322) that are magnetically coupled.

Images