JP2013074722A - Power conversion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power conversion device that has small outside dimensions.SOLUTION: A power conversion device 1 includes: a first converter section 16 and a second converter section 17 for voltage-converting DC powers input from a first power supply and a second power supply of different voltages, respectively; and an inverter section 18 for converting the DC power voltage-converted in the first converter section 16 or the second converter section 17 to AC power. The first converter section 16 has a first terminal connection part 30 including a pair of input terminals 300 connected to a first power supply 80, and the second converter section 17 has a second terminal connection part 31 including a pair of input terminals 310 connected to a second power supply 81. The first terminal connection part 30 and the second terminal connection part 31 are arranged along the same end face, that is, an input side end face 15, of the power conversion device 1.

Description

  The present invention relates to a power conversion device including two converter units and an inverter unit.

  In order to drive a motor, an electric vehicle, a hybrid vehicle, and the like are equipped with a power conversion device that converts DC power from a battery into AC power. Since the power conversion device is mounted in a limited space such as in an engine room, for example, a small device is desired.

  As an example of the above power converter, a power converter disclosed in Patent Document 1 has been proposed. This power conversion device integrates a converter unit that boosts DC power supplied from a battery and an inverter unit that converts DC power boosted by the converter unit into AC power, thereby reducing the size of the power conversion device. Is to achieve.

  By the way, with the recent increase in environmental awareness, development of an electric vehicle equipped with a DC power generator such as a fuel cell has been developed. Such an electric vehicle includes two power sources, ie, the DC power generation device and the battery, and the voltages of the DC power supplied from both may be different from each other. In this case, for example, two converter units are required to individually convert the DC power respectively supplied from the two power sources. In this case, it is conceivable to reduce the size of the power converter by integrating the two converter units with the inverter unit.

JP 2011-72049 A

  However, when two converter units are to be incorporated in the power conversion device, the arrangement of the terminal connection unit that connects the DC power input terminals becomes a problem. That is, when the second converter unit is incorporated in the power converter in addition to the first converter unit, in addition to the terminal connection unit for inputting DC power to the first converter unit, the second converter unit is connected to the DC converter. A terminal connection portion for inputting power is disposed. If it does so, there exists a possibility that the external dimension of the said power converter device may become large depending on the method of arrangement | positioning of the said 2 terminal connection part.

  The present invention has been made in view of the above-described background, and an object of the present invention is to provide a power converter having a small outer dimension while including two converter units.

One aspect of the present invention includes a first converter unit and a second converter unit that perform voltage conversion on DC power input from a first power source and a second power source that have different voltages, and the first converter unit or the second converter unit. An inverter unit for converting the DC power converted in voltage into AC power,
The first converter unit includes a first terminal connection unit including a pair of input terminals connected to the first power source,
The second converter unit includes a second terminal connection unit including a pair of input terminals connected to the second power source,
The first terminal connecting portion and the second terminal connecting portion are arranged along an input side end face which is the same end face of the power converter (Claim 1). ).

  The power converter is formed by integrating the first converter unit and the second converter unit with the inverter unit. Thereby, compared with the case where at least one of the first converter unit and the second converter unit is separated from the inverter unit, it is possible to make the arrangement space compact.

  Moreover, the said 1st terminal connection part and the said 2nd terminal connection part are arrange | positioned along the input side end surface which is the same end surface in the said power converter device. Therefore, even if the second terminal connection portion is increased by integrating the second converter portion in addition to the first converter portion with respect to the inverter portion, the external dimensions of the power conversion device are thereby increased. Can be prevented. That is, the external dimensions of the power converter can be reduced as compared with the case where the first terminal connecting portion and the second terminal connecting portion are disposed on different end faces of the power converter.

  As described above, according to the above aspect, it is possible to provide a power converter having a small external dimension while including two converter units.

A side view of a power converter in an example (sectional view in a plane perpendicular to transverse direction Y). The top view which looked at the flame | frame holding the laminated body and the reactor in an Example from the main electrode direction of the semiconductor module (AA sectional view taken on the line AA of FIG. 1). The top view of the capacitor module in an Example (BB sectional view taken on the line in FIG. 1). The side view which showed the connection state of the terminal connection part in an Example (CC sectional view taken on the line CC of FIG. 1). The perspective view of the connection member which connects the high potential side input terminal and high potential side capacitor | condenser connection terminal in an Example. The perspective view of the connection member which connects the low potential side input terminal and low potential side capacitor | condenser connection terminal in an Example. Explanatory drawing which shows the circuit of the power converter device in an Example.

  In the power converter, a pair of output terminals that supply DC power from the first power source are connected to the pair of input terminals of the first terminal connection unit. In addition, a pair of output terminals that supply DC power from the second power source are connected to the pair of input terminals of the second terminal connection portion. Thereby, two direct-current electric power from which a voltage mutually differs is supplied to the said power converter device.

  The first terminal connection portion and the second terminal connection portion may be terminal blocks formed of resin or the like, for example. In this case, the output terminals of the first power supply and the second power supply, and the input terminals of the first terminal connection part and the second terminal connection part are fastened with bolts or the like on the terminal block, so that the Connection can be made.

  When the terminal block is not formed, the output terminals of the first power source and the second power source and the input terminals of the first terminal connection portion and the second terminal connection portion are fastened with bolts or the like, respectively. The method of connecting, the method of connecting by resistance welding, etc. are employable.

Further, the low potential side input terminal of the first terminal connection portion and the low potential side input terminal of the second terminal connection portion may be disposed adjacent to each other (claim 2).
In this case, the distance between the input terminals on the high potential side in each of the first terminal connection portion and the second terminal connection portion can be made larger than the distance between the input terminals on the low potential side. Therefore, the distance between the input terminal on the high potential side of the first terminal connection portion and the input terminal on the high potential side of the second terminal connection portion can be sufficiently large. As a result, the insulation resistance between the two can be increased, and the influence of noise and the like between them can be suppressed.

The first converter unit includes a first reactor, the second converter unit includes a second reactor, and one electrode terminal of each of the first reactor and the second reactor is connected to the first terminal. And an input terminal on the high potential side in the second terminal connecting portion.
In this case, a wiring member that electrically connects the first reactor and the second reactor, and the first terminal connection portion and the second terminal connection portion can be omitted. As a result, the number of parts of the power converter can be reduced.

In addition, the first converter unit includes a first capacitor, the second converter unit includes a second capacitor, and one electrode of the first capacitor and one electrode of the second capacitor have a common low The low potential side capacitor terminal connection portion may be electrically connected to the low potential side input terminals of the first terminal connection portion and the second terminal connection portion. Item 4).
In this case, a terminal connecting portion for connecting one electrode of the first capacitor and the second capacitor can be shared with the low potential side capacitor terminal connecting portion. As a result, it is possible to simplify the low-potential side capacitor terminal connection portion and reduce the number of parts.

Further, the low potential side capacitor terminal connecting portion may be disposed along the input side end face of the power converter.
In this case, the low potential side capacitor terminal connection portion is disposed on the same side end surface as the first terminal connection portion and the second terminal connection portion. As a result, the low potential side capacitor terminal connection portion can be disposed without increasing the external dimensions of the power converter.

Further, the low potential side capacitor terminal connection portion may be disposed between the first terminal connection portion and the second terminal connection portion.
In this case, the wiring member that electrically connects the low-potential side capacitor terminal connection part and the low-potential side input terminals of the first terminal connection part and the second terminal connection part is downsized. be able to. As a result, the power converter can be simplified.

A first high-potential-side capacitor terminal connection portion connected to the other electrode of the first capacitor and electrically connected to an input terminal on the high-potential side of the first terminal connection portion; and the other of the second capacitor. And the second high potential side capacitor terminal connection portion connected to the high potential side input terminal of the second terminal connection portion and the low potential side capacitor terminal connection along the input side end surface. It may be arranged on both sides of the part (claim 7).
In this case, the terminal connection portions of the reactor and the capacitor respectively included in the first converter portion and the second converter portion can be collectively arranged along the input side end surface. As a result, it is possible to arrange the terminal connection portions of the reactor and the capacitor without increasing the external dimensions of the power conversion device, and it is possible to improve the workability of the wiring work at the terminal connection portions.

In addition, a plurality of semiconductor modules respectively included in the first converter unit, the second converter unit, and the inverter unit are arranged in a direction orthogonal to the input side end surface, and the first reactor and the first converter A first bus bar that electrically connects the main electrode terminal of the semiconductor module included in the section, and a second bus bar that electrically connects the second reactor and the main electrode terminal of the semiconductor module included in the second converter section. 2 bus bars, each of the first bus bar and the second bus bar having a body portion extending in the arrangement direction of the semiconductor modules, and between the body portion of the first bus bar and the body portion of the second bus bar. The main electrode terminal of the semiconductor module may be arranged (claim 8).
In this case, a sufficient space can be provided between the first bus bar and the second bus bar. Thereby, during operation of the power converter, it is possible to reduce the influence of electromagnetic noise generated from one of the first bus bar and the second bus bar on the other.

Also, a plurality of the semiconductor modules respectively included in the first converter unit, the second converter unit, and the inverter unit, and a plurality of refrigerant flow paths disposed on both main surfaces of the semiconductor module are stacked on each other. The laminated body may be comprised and the said 1st reactor and the said 2nd reactor may be arrange | positioned at the end of the lamination direction of the said laminated body (Claim 9).
In this case, since the first reactor and the second reactor are disposed in the vicinity of the refrigerant flow path, heat generated from the first reactor and the second reactor is radiated to the refrigerant flow path. be able to. As a result, the first reactor and the second reactor can be downsized, and the external dimensions of the power converter can be reduced.

Examples of the power conversion device will be described with reference to FIGS.
As shown in FIG. 7, the power conversion apparatus 1 of the present example includes a first converter unit 16 and a second converter unit 17 that convert DC power input from a first power source 80 and a second power source 81 having different voltages, respectively. It has. The power conversion device 1 also includes an inverter unit 18 that converts the DC power voltage-converted in the first converter unit 16 or the second converter unit 17 into AC power.

  Moreover, the 1st converter part 16 has the 1st terminal connection part 30 provided with a pair of input terminal 300 (300a, 300b) connected with the 1st power supply 80, as shown in FIG. 17 has the 2nd terminal connection part 31 provided with a pair of input terminal 310 (310a, 310b) connected with the 2nd power supply 81. FIG. And the 1st terminal connection part 30 and the 2nd terminal connection part 31 are arrange | positioned along the input side end surface 15 which is the same end surface in the power converter device 1, as shown in FIG.

  The 1st converter part 16, the 2nd converter part 17, and the inverter part 18 of the power converter device 1 are mutually connected by wiring members, such as a bus bar, and comprise the power converter circuit shown in FIG. The DC power supplied from the first power source 80 via the first terminal connection unit 30 and the DC power supplied from the second power source 81 via the second terminal connection unit 31 are respectively the first converter unit 16 or The voltage is converted by the second converter unit 17 and then input to the inverter unit 18 where it is converted to AC power. The AC power output from the inverter unit 18 becomes a driving force of the rotating electrical machine 86.

  As shown in FIG. 7, the first converter unit 16 includes a first reactor 21, a first capacitor 51, and a plurality of semiconductor modules 20, and constitutes a boost converter circuit. In this example, two semiconductor modules in which one electrode terminal 23 of the first reactor 21 is electrically connected to one electrode 510 of the first capacitor 51 and the other electrode terminal 24 of the first reactor 21 is connected to each other in series. It is electrically connected by a wiring member such as a bus bar so as to be electrically connected to the 20 connection points. The high-potential-side output terminal 82 of the first power supply 80 is connected to one electrode 510 of the first capacitor 51, and the low-potential-side output terminal 83 is connected to the other electrode 511.

  As shown in FIG. 7, the second converter unit 17 includes a second reactor 22, a second capacitor 52, and two semiconductor modules 20, and configures a boost converter circuit similar to the first converter unit 16. Yes. That is, one electrode terminal 25 of the second reactor 22 is electrically connected to one electrode 520 of the second capacitor 52, and the other electrode terminal 26 of the second reactor 22 is connected to each other in series. It is electrically connected by a wiring member such as a bus bar so as to be electrically connected to the connection point. The output terminal 84 on the high potential side of the second power supply 81 is connected to one electrode 520 of the second capacitor 52, and the output terminal 85 on the low potential side is connected to the other electrode 521.

  The first converter unit 16 and the second converter unit 17 are configured to boost different voltages of the first power source 80 and the second power source 81 to a predetermined same voltage and supply DC power to the inverter unit 18. It is. In this example, the first power source 80 is a fuel cell, and the second power source 81 is a battery.

  The inverter unit 18 configures two inverter circuits 180 (180a, 180b) by electrically connecting the plurality of semiconductor modules 20 and the smoothing capacitor 53 by a wiring member such as a bus bar. In this example, as shown in FIG. 7, two inverter circuits 180 a and 180 b are configured using six semiconductor modules 20 and a common smoothing capacitor 53, one for each of the inverter circuits 180. The rotating electrical machine 86 is connected.

  Each inverter circuit 180 is constituted by connecting three pairs of parallel bodies of two semiconductor modules 20 connected in series to each other in parallel, and the first converter unit 16 and the second converter are connected to both ends thereof. DC power output from the unit 17 is input. And the connection point of the two semiconductor modules 20 in each of the three pairs of serial bodies is connected to the three electrodes of the three-phase AC rotating electrical machine 86.

  Next, the structure of the power conversion device 1 will be described. As shown in FIG. 1, the power conversion device 1 is configured by housing components in a case 10 having a substantially rectangular parallelepiped shape. In this case 10, a first converter unit 16, a second converter unit 17, and an inverter unit 18 are accommodated.

  As shown in FIG. 2, the semiconductor modules 20 included in the first converter unit 16, the second converter unit 17, and the inverter unit 18 are alternately stacked with a plurality of refrigerant channels 41 to form a stacked body 40. . As shown in FIG. 2, the stacked body 40 is arranged in the case 10 with one end in the stacking direction (hereinafter, this direction is referred to as “stacking direction X”) facing the input side end surface 15.

  Further, as shown in FIG. 2, the refrigerant flow path 41 of the stacked body 40 constitutes the cooler 4 that cools the semiconductor module 20 together with the refrigerant introduction pipe 42, the refrigerant discharge pipe 43, and the connection pipe 45. The refrigerant flow path 41 is configured by a cooling pipe 44 that is long in a direction orthogonal to the stacking direction X (hereinafter, this direction is referred to as a lateral direction Y). The cooler 4 is formed by arranging a plurality of cooling pipes 44 in the stacking direction X, and connecting cooling pipes 44 adjacent to each other in the stacking direction X by connecting pipes 45 in the vicinity of both ends in the longitudinal direction (lateral direction Y). It becomes. And the cooler 4 is comprised so that both the main surfaces of the semiconductor module 20 can be pinched | interposed between the adjacent cooling pipes 44. FIG. Thus, the semiconductor modules 20 are arranged in the stacking direction X, that is, the normal direction of the input side end face 15.

  In this example, two semiconductor modules 20 connected in series with each other are sandwiched between adjacent cooling pipes 44. Further, the cooler 4 has nine cooling pipes 44 arranged in parallel in the stacking direction X, and two semiconductor modules 20 are laterally arranged in eight spaces formed between adjacent cooling pipes 44. They are arranged side by side in the direction Y. Of the semiconductor modules 20 arranged in eight stages as described above, the semiconductor modules 20 included in the first converter section 16 and the second converter section 17 are arranged in two stages close to the input side end face 15. More specifically, a pair of semiconductor modules 20 included in the second converter unit 17 is arranged in the first stage on the input side end face 15 side, and a pair of semiconductors included in the first converter unit 16 is arranged in the second stage. A module 20 is arranged.

  As shown in FIG. 2, a refrigerant introduction pipe 42 and a refrigerant discharge pipe 43 are disposed at both ends in the lateral direction Y of the cooling pipe 44 disposed at one end in the stacking direction X. The refrigerant introduction pipe 42 and the refrigerant discharge pipe 43 are extended in the stacking direction X with one end in the stacking direction X of the stacked body 40 as a base end, and projecting from the side surface of the case 10 facing the input side end face 15. Yes.

  As a result, the cooling medium introduced from the refrigerant introduction pipe 42 passes through the connecting pipe 45 as appropriate, is distributed to each cooling pipe 44, and can flow in the longitudinal direction (lateral direction Y). The cooling medium can exchange heat with the semiconductor module 20 while flowing through each cooling pipe 44. The cooling medium whose temperature has increased due to heat exchange passes through the downstream connecting pipe 45 as appropriate, is guided to the refrigerant discharge pipe 43, and can be discharged from the cooler 4.

  The semiconductor module 20 includes a switching element 201 such as an IGBT element. As shown in FIG. 1, the semiconductor module 20 includes a mold part 202 formed by resin-molding a switching element 201 and the like, and a main electrode terminal 203 and a control terminal 204 that protrude in opposite directions from the mold part 202. .

  The semiconductor module 20 is disposed in the stacked body 40 so that the main electrode terminal 203 and the control terminal 204 protrude in a direction orthogonal to both the stacking direction X and the lateral direction Y (hereinafter referred to as the height direction Z). . As shown in FIG. 1, a control board 27 is provided on the side where the control terminals 204 protrude from the stacked body 40. The control board 27 is appropriately connected to the control terminal 204 and configured to control the operation of the switching element 201 in each semiconductor module 20. On the other hand, a capacitor module 5 to be described later is disposed on the side where the main electrode terminal 203 protrudes from the stacked body 40.

  Moreover, as shown in FIG. 2, the 1st reactor 21 of the 1st converter part 16 and the 2nd reactor 22 of the 2nd converter part 17 are arrange | positioned at the end in the lamination direction X of the laminated body 40. As shown in FIG. The first reactor 21 and the second reactor 22 are arranged side by side in the lateral direction Y between the stacked body 40 and the input side end face 15.

  Both the first reactor 21 and the second reactor 22 are cylindrical coils formed by winding a rod-like element wire in a spiral shape. One of the electrode terminals 23 and 25 is formed toward the input side end face 15, that is, in the stacking direction X. Further, as shown in FIG. 2, the other electrode terminal 24 of the first reactor 21 and the other electrode terminal 26 of the second reactor 22 are such that the tip portions 240 and 260 of the electrodes are opposite to each other in the lateral direction Y. It is formed as follows.

  As shown in FIG. 2, the laminated body 40, the first reactor 21, and the second reactor 22 arranged in this manner are held in a frame 2 that surrounds them from four directions within the case 10. The side surface 28 of the frame 2 facing the input side end surface 15 of the case 10 includes a first terminal connection portion 30 and a second terminal connection portion 31 that are aligned with each other in the direction along the input side end surface 15 (lateral direction Y). ing.

  The 1st terminal connection part 30 and the 2nd terminal connection part 31 are each provided with a pair of input terminal 300 (300a, 300b) and 310 (310a, 310b). In these two pairs of input terminals 300 and 310, as shown in FIGS. 2 and 4, low potential side input terminals to which the low potential side output terminals 83 and 85 of the first power source 80 and the second power source 81 are respectively connected. 300b and 310b are arranged adjacent to each other. That is, the low potential side input terminals 300b and 310b are connected between the high potential side input terminals 300a and 310a to which the high potential side output terminals 82 and 84 of the first power source 80 and the second power source 81 are respectively connected. Will be placed.

  Further, the input terminal 300 a on the high potential side in the first terminal connection portion 30 is configured by a tip portion of one electrode terminal 23 in the first reactor 21 that extends in the stacking direction X. Similarly, the input terminal 310 a on the high potential side in the second terminal connection portion 31 is configured by a tip portion of one electrode terminal 25 in the second reactor 22 that extends in the stacking direction X.

  Thus, with respect to the frame 2 (laminated body 40) arranged in the case 10, as shown in FIGS. 1 and 3, in the direction in which the main electrode terminal 203 of the semiconductor module 20 in the height direction Z protrudes, The capacitor module 5 including the first capacitor 51 of the first converter unit 16, the second capacitor 52 of the second converter unit 17, and the smoothing capacitor 53 of the inverter unit 18 is disposed. The first capacitor 51, the second capacitor 52, and the smoothing capacitor 53 are disposed at positions facing the first reactor 21, the second reactor 22, and the laminated body 40, respectively, and are accommodated integrally in the resin case 50 so as to be a capacitor module. 5 is constituted.

  As shown in FIG. 3, the end portion 500 along the input side end face 15 of the capacitor module 5 has a low potential side capacitor terminal connection portion 54, a first high potential side capacitor terminal connection portion 56, and a second high potential side. A capacitor terminal connection 58 is formed. As shown in FIG. 3, the low-potential side capacitor terminal connection portion 54 is disposed substantially at the center of the end portion 500 in the lateral direction Y. The first high potential side capacitor terminal connection portion 56 and the second high potential side capacitor terminal connection portion 58 are disposed on both sides of the low potential side capacitor terminal connection portion 54, respectively.

  As shown in FIG. 3, the low potential side capacitor terminal connection portion 54 is connected to both the one electrode 510 of the first capacitor 51 and the one electrode 520 of the second capacitor 52. A fastening portion 550 of the connection member 55 is disposed. The low-potential side connection member 55 extends the conductor toward the one electrode 510 of the first capacitor 51 and the one electrode 520 of the second capacitor 52 with the fastening portion 550 as a base end.

  Further, as shown in FIG. 3, the first high potential side capacitor terminal connection portion 56 is provided with a fastening portion 570 of the first high potential side connection member 57 that is electrically connected to the other electrode 511 of the first capacitor 51. Yes. The first high potential side connection member 57 extends the conductor toward the other electrode 511 of the first capacitor 51 with the fastening portion 570 as a base end.

  Similarly, the second high potential side capacitor terminal connection portion 58 is provided with a fastening portion 590 of the second high potential side connection member 59 that is electrically connected to the other electrode 521 of the second capacitor 52. The second high potential side connection member 59 has a conductor extending toward the other electrode 521 of the second capacitor 52 with the fastening portion 590 disposed in the second high potential side capacitor terminal connection portion 58 as a base end. Yes.

  Further, the low potential side capacitor terminal connection portion 54, the first high potential side capacitor terminal connection portion 56, and the second high potential side capacitor terminal connection portion 58 are the same as the input side as viewed from the height direction Z. The first terminal connection portion 30 and the second terminal connection portion 31 disposed along the end surface 15 are disposed at positions that do not interfere with each other. That is, as shown in FIG. 4, the first high potential side capacitor terminal connection portion 56 and the second high potential side capacitor terminal connection portion 58 are arranged at both ends in the lateral direction Y. Next, an input terminal 300a on the high potential side of the first terminal connection portion 30 and an input terminal 310a on the high potential side of the second terminal connection portion 31 are arranged next to each other. Further, the input terminal 300b on the low potential side of the first terminal connection portion 30 and the input terminal 310b on the low potential side of the second terminal connection portion 31 are arranged adjacent to each other, and the low potential side input terminal 300b is disposed between them. A potential side capacitor terminal connection 54 is disposed.

  Further, the low potential side capacitor terminal connection portion 54, the first high potential side capacitor terminal connection portion 56, and the second high potential side capacitor terminal connection portion 58 are, as shown in FIG. They are arranged side by side in the lateral direction Y as seen from the stacking direction X). Similarly, the first terminal connection portion 30 and the second terminal connection portion 31 are arranged side by side in the lateral direction Y as viewed from the input side end face 15 side (stacking direction X). The low-potential side capacitor terminal connection portion 54, the first high-potential side capacitor terminal connection portion 56, and the second high-potential side capacitor terminal connection portion 58 are as high as the first terminal connection portion 30 and the second terminal connection portion 31, respectively. They are arranged at different positions in the direction Z.

  Further, the first terminal connection portion 30 and the second terminal connection portion 31 are configured in a state where each terminal is appropriately placed on a terminal block 29 fixed to the frame 2. Similarly, the low potential side capacitor terminal connection portion 54, the first high potential side capacitor terminal connection portion 56, and the second high potential side capacitor terminal connection portion 58 are appropriately attached to the terminal block 501 fixed to the capacitor module 5. It is comprised in the state which mounted each terminal.

  As shown in FIG. 4, the first high potential side connection member 57 placed on the terminal block 501 of the first high potential side capacitor terminal connection portion 56 and the height placed on the terminal block 29 of the first terminal connection portion 30. The input terminal 300a on the potential side is electrically connected to each other by a wiring member 560 shown in FIG. The wiring member 560 has one end 561 and the other end 562 formed by bending in a direction orthogonal to the both ends of a plate-bar-shaped main body portion 563 extending in the height direction Z.

  One end 561 of the wiring member 560 is fastened by a bolt 502 at the terminal block 501 of the first high potential side capacitor terminal connection portion 56 together with the fastening portion 570 of the first high potential side connection member 57. The other end 562 is fastened together with the input terminal 300a on the high potential side by a bolt 290 at the terminal block 29 of the first terminal connection portion 30. Then, the output terminal 82 on the high potential side of the first power supply 80 is fastened together with the other end 562, whereby the other electrode 511 of the first capacitor 51, one electrode terminal 23 of the first reactor 21, and the first power supply 80. Are connected to the output terminal 82 on the high potential side.

  Similarly, the second high potential side connection member 59 placed on the terminal block 501 of the second high potential side capacitor terminal connection portion 58 and the high potential side placement placed on the terminal block 29 of the second terminal connection portion 31. The input terminal 310a is electrically connected to each other by a wiring member 560. That is, one end 561 of the wiring member 560 is fastened by the bolt 502 at the terminal block 501 of the second high potential side capacitor terminal connection portion 58 together with the fastening portion 590 of the second high potential side connection member 59, and the other end 562 is fast side. The input terminal 310a and the terminal block 29 of the second terminal connection portion 31 are fastened together by bolts 290. Then, the output terminal 84 on the high potential side of the second power supply 81 is fastened together with the other end 562, whereby the other electrode 521 of the second capacitor 52, one electrode terminal 25 of the second reactor 22, and the second power supply 81. The output terminals 84 on the high potential side are electrically connected to each other.

  Further, as shown in FIG. 4, the low potential side input terminal 300b and the low potential side input terminal 310b mounted on the terminal block 29 of the first terminal connection portion 30 and the second terminal connection portion 31, respectively, The low potential side connecting member 55 placed on the terminal block 501 of the side capacitor terminal connecting portion 54 is electrically connected to each other by the wiring member 540 shown in FIG. The wiring member 540 includes a plate bar-shaped central portion 542 extending in the lateral direction Y, and a pair of standing portions formed by extending from both ends of the central portion 542 in one direction (height direction Z) perpendicular thereto. 544. Each of the standing portions 544 has one end 541 formed by bending each end portion in a direction perpendicular to the standing portion 544 and the other end 543. The low potential side input terminal 300 b is configured by one end 541 of the wiring member 540, and the low potential side input terminal 310 b is configured by the other end 543 of the wiring member 540.

  The fastening portion 550 of the low potential side connection member 55 is fastened by the bolt 502 at the terminal block 501 of the low potential side capacitor terminal connection portion 54 together with the central portion 542 of the wiring member 540. Then, the low potential side input terminal 300 b is fastened by the bolt 290 together with the low potential side output terminal 83 of the first power supply 80 in the terminal block 29 of the first terminal connection portion 30. Similarly, the low potential side input terminal 310 b is fastened by the bolt 290 together with the low potential side output terminal 85 of the second power supply 81 in the terminal block 29 of the second terminal connection portion 31. Accordingly, the output terminal 83 on the low potential side of the first power supply 80, the output terminal 85 on the low potential side of the second power supply 81, the one electrode 510 of the first capacitor 51, and the one electrode of the second capacitor 52. 520 are electrically connected to each other.

  Further, as shown in FIG. 2, the other electrode terminal 24 of the first reactor 21 and the other electrode terminal 26 of the second reactor 22 are electrically connected to the first bus bar 6 or the second bus bar 7 at their tip portions 240 and 260, respectively. Connected. Thus, the first reactor 21 is electrically connected to the semiconductor module 20 included in the first converter unit 16 via the first bus bar 6, and the second reactor 22 is connected to the second converter unit 17 via the second bus bar 7. It is electrically connected to the semiconductor module 20 included in the. Note that the wiring members excluding the first bus bar 6 and the second bus bar 7 are not shown in FIGS. 1 and 2 for convenience, but are appropriately connected to the main electrode terminal 203 of the semiconductor module 20 as appropriate. .

  The first bus bar 6 includes a plate bar-shaped main body portion 60 and a main electrode connection portion 61 extending in a direction orthogonal to the main body portion 60. That is, in the first bus bar 6, the main body 60 extends from the other electrode terminal 24 of the first reactor 21 to the stacked body 40 side in the stacking direction X, and the main electrode connecting section 61 extends from the tip. Is extended to the semiconductor module 20 side in the lateral direction Y.

  The second bus bar 7 has the same structure as the first bus bar 6. That is, in the second bus bar 7, the main body 70 extends from the other electrode terminal 26 of the second reactor 22 toward the stacked body 40 in the stacking direction X, and the main electrode connecting portion 71 extends from the tip. Is extended to the semiconductor module 20 side in the lateral direction Y. The main electrode terminal 203 of the semiconductor module 20 is disposed between the main body portion 60 of the first bus bar 6 and the main body portion 70 of the second bus bar 7. That is, the first bus bar 6 and the second bus bar 7 are arranged on both sides in the horizontal direction Y with respect to the pair of semiconductor modules 20 arranged in the horizontal direction Y. The first bus bar 6 and the second bus bar 7 extend in parallel to each other in the stacking direction X in the vicinity of both ends in the lateral direction Y of the stacked body 40.

  Next, the function and effect of this example will be described. The power converter 1 is formed by integrating a first converter unit 16 and a second converter unit 17 with an inverter unit 18. Thereby, compared with the case where the inverter unit 18 is separated from at least one of the first converter unit 16 and the second converter unit 17, it is possible to make these arrangement spaces compact.

  Further, as shown in FIG. 2, the first terminal connection portion 30 and the second terminal connection portion 31 are disposed along the input side end face 15 that is the same end face in the power conversion device 1. Therefore, even if the second terminal connection portion 31 is increased by integrating the second converter portion 17 in addition to the first converter portion 16 with respect to the inverter portion 18, the external dimensions of the power conversion device 1 are thereby increased. Can be prevented. That is, compared with the case where the 1st terminal connection part 30 and the 2nd terminal connection part 31 are each arrange | positioned in the different end surface of the power converter device 1, the external dimension of the power converter device 1 can be made small.

  Further, as shown in FIG. 2, the low potential side input terminal 300b in the first terminal connection portion 30 and the low potential side input terminal 310b in the second terminal connection portion 31 are arranged adjacent to each other. As a result, the distance between the high potential side input terminals 300a and 310a in each of the first terminal connection portion 30 and the second terminal connection portion 31 is made larger than the distance between the low potential side input terminals 300b and 310b. Can be bigger. Therefore, the distance between the input terminal 300a on the high potential side of the first terminal connection part 30 and the input terminal 310a on the high potential side of the second terminal connection part 31 having different potentials can be made sufficiently large. As a result, the insulation resistance between the two can be increased, and the influence of noise and the like between them can be suppressed.

  Moreover, as shown in FIG. 2, the tip part of one electrode terminal 23 and 25 in the 1st reactor 21 and the 2nd reactor 22 is a high potential side input in the 1st terminal connection part 30 and the 2nd terminal connection part 31, respectively. Terminals 300a and 310a are configured. Therefore, the wiring member which electrically connects between the 1st reactor 21 and the 2nd reactor 22, and the 1st terminal connection part 30 and the 2nd terminal connection part 31 is omissible. As a result, the number of parts of the power conversion device 1 can be reduced.

  Further, as shown in FIG. 3, one electrode 510 of the first capacitor 51 and one electrode 520 of the second capacitor 52 are electrically connected at a common low potential side capacitor terminal connection portion 54 by a low potential side connection member 55. It is connected. As shown in FIG. 4, the low potential side connection member 55 is electrically connected to the low potential side input terminals 300 b and 310 b in the first terminal connection portion 30 and the second terminal connection portion 31 in the low potential side capacitor terminal connection portion 54. ing. Therefore, the terminal connection portion that connects one electrode 510 of the first capacitor 51 and one electrode 520 of the second capacitor 52 can be shared by the low potential side capacitor terminal connection portion 54. As a result, the low potential side capacitor terminal connection portion 54 can be simplified and the number of components can be reduced.

  Further, as shown in FIG. 3, the low potential side capacitor terminal connection portion 54 is disposed along the input side end face 15 in the power conversion device 1. The first high potential side capacitor terminal connection portion 56 and the second high potential side capacitor terminal connection portion 58 are arranged on both sides of the low potential side capacitor terminal connection portion 54 along the input side end face 15. Therefore, the reactor and capacitor terminal connection portions respectively included in the first converter unit 16 and the second converter unit 17 can be collectively arranged along the input side end face 15. As a result, the reactor and the terminal connection portion of the capacitor can be disposed without increasing the external dimensions of the power converter 1, and the workability of the wiring work can be improved at the terminal connection portion.

  Further, as shown in FIG. 4, the low potential side capacitor terminal connection portion 54 is disposed between the first terminal connection portion 30 and the second terminal connection portion 31. Therefore, the wiring member 540 that electrically connects the low potential side capacitor terminal connection portion 54 and the low potential side input terminals 300b and 310b in the first terminal connection portion 30 and the second terminal connection portion 31 is reduced in size. can do. As a result, the power conversion device 1 can be simplified.

  As shown in FIG. 2, the main electrode terminal 203 of the semiconductor module 20 is disposed between the main body portion 60 of the first bus bar 6 and the main body portion 70 of the second bus bar 7. Therefore, a sufficient space can be provided between the first bus bar 6 and the second bus bar 7. As a result, it is possible to reduce the influence of electromagnetic noise generated from one of the first bus bar 6 and the second bus bar 7 on the other during the operation of the power conversion device 1.

  Further, as shown in FIG. 2, the first reactor 21 and the second reactor 22 are arranged at one end in the stacking direction X of the stacked body 40. Therefore, since the 1st reactor 21 and the 2nd reactor 22 are arrange | positioned in the vicinity of the refrigerant flow path 41, the heat which generate | occur | produces from the 1st reactor 21 and the 2nd reactor 22 can be radiated to the refrigerant flow path 41. it can. As a result, the first reactor 21 and the second reactor 22 can be reduced in size, and the external dimensions of the power conversion device 1 can be reduced.

DESCRIPTION OF SYMBOLS 1 Power converter 15 Input side end surface 16 1st converter part 17 2nd converter part 18 Inverter part 20 Semiconductor module 21 1st reactor 22 2nd reactor 30 1st terminal connection part 300 Input terminal 31 2nd terminal connection part 310 Input terminal 40 Laminate 5 Capacitor Module 6 First Bus Bar 7 Second Bus Bar

Claims (9)

The first converter unit and the second converter unit for converting the DC power respectively input from the first power source and the second power source having different voltages, and the DC power converted by the first converter unit or the second converter unit. A power conversion device including an inverter unit that converts AC power into AC power,
The first converter unit includes a first terminal connection unit including a pair of input terminals connected to the first power source,
The second converter unit includes a second terminal connection unit including a pair of input terminals connected to the second power source,
The said 1st terminal connection part and the said 2nd terminal connection part are arrange | positioned along the input side end surface which is the same end surface in the said power converter device, The power converter device characterized by the above-mentioned.   2. The power conversion device according to claim 1, wherein a low potential side input terminal in the first terminal connection portion and a low potential side input terminal in the second terminal connection portion are arranged adjacent to each other. The power converter characterized by this.   3. The power converter according to claim 1, wherein the first converter unit includes a first reactor, the second converter unit includes a second reactor, and one of the first reactor and the second reactor. The electrode terminal of each comprises the input terminal of the high potential side in the said 1st terminal connection part and the said 2nd terminal connection part, respectively, The power converter device characterized by the above-mentioned.   4. The power conversion device according to claim 1, wherein the first converter unit includes a first capacitor, the second converter unit includes a second capacitor, and one of the first capacitors. And one electrode of the second capacitor are connected to a common low-potential-side capacitor terminal connecting portion, and the low-potential-side capacitor terminal connecting portion is connected to the first terminal connecting portion and the second terminal connecting portion. A power conversion device characterized in that it is electrically connected to an input terminal on the low potential side.   5. The power conversion device according to claim 4, wherein the low-potential side capacitor terminal connection portion is disposed along the input-side end face of the power conversion device.   6. The power converter according to claim 4, wherein the low potential side capacitor terminal connection portion is disposed between the first terminal connection portion and the second terminal connection portion. Conversion device.   7. The power converter according to claim 6, wherein the first high potential side capacitor terminal connection is connected to the other electrode of the first capacitor and is electrically connected to the high potential side input terminal of the first terminal connection portion. And a second high potential side capacitor terminal connecting portion connected to the other electrode of the second capacitor and conducting to the high potential side input terminal of the second terminal connecting portion on the input side end face The power converter is arranged on both sides of the low potential side capacitor terminal connecting portion along the side.   8. The power conversion device according to claim 1, wherein a plurality of semiconductor modules respectively included in the first converter unit, the second converter unit, and the inverter unit are orthogonal to the input-side end surface. A first bus bar that is arranged in a direction and electrically connects the first reactor and a main electrode terminal of the semiconductor module included in the first converter unit; and the second reactor and the second converter unit. A second bus bar electrically connecting a main electrode terminal of the included semiconductor module, and each of the first bus bar and the second bus bar includes a main body portion extending in the arrangement direction of the semiconductor module, A power conversion device, wherein a main electrode terminal of the semiconductor module is disposed between a main body portion of the bus bar and a main body portion of the second bus bar.   9. The power conversion device according to claim 1, wherein a plurality of the semiconductor modules respectively included in the first converter unit, the second converter unit, and the inverter unit, and both main parts of the semiconductor modules are included. A plurality of refrigerant flow paths disposed on the surface are laminated with each other to constitute a laminated body, and the first reactor and the second reactor are disposed at one end in the lamination direction of the laminated body. A power conversion device.

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