JP2019047608A - Power conversion apparatus - Google Patents

Abstract

To provide a power conversion apparatus which can simplify wiring and reduce height.SOLUTION: A power conversion apparatus 1 comprises: an input part 2 to which direct current power is input; a reactor 3 which constitutes a part of a step-up part for stepping-up the direct current power input from the input part 2; a filter capacitor 41 which absorbs the current ripple between the input part 2 and the step-up part; a smoothing capacitor 42 for smoothing the direct current voltage stepped-up by the step-up part; and a switching circuit part 5 provided with a plurality of switching elements. The input part 2, the smoothing capacitor 42, and the reactor 3 are arranged at positions adjacent to the filter capacitor 41. The filter capacitor 41, the input part 2, the smoothing capacitor 42, and the reactor 3 are disposed in a two-dimensional array direction being one two-dimensional spread direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a power converter that performs power conversion between direct current power and alternating current power.

  A power conversion device that performs power conversion between DC power and AC power is connected between a DC power supply and an AC load. Then, DC power input from the DC power supply can be converted into AC power and can be output to an AC load. Patent Document 1 discloses a power converter including a filter capacitor, a smoothing capacitor, and a reactor.

JP, 2016-158358, A

  However, Patent Document 1 does not describe at all the arrangement of the input unit, which is a portion to which direct current power is input from the direct current power supply, in the power conversion device. That is, the input unit such as the input connector is not disclosed in Patent Document 1. Depending on the arrangement of the input unit, the simplification of the wiring may be hindered or the miniaturization of the power converter may be hindered.

  For example, a power converter for a vehicle is often mounted in an engine compartment, but in this case, the mounting space is limited. Therefore, there is a demand for downsizing and shortening of the power converter. In particular, in a power conversion device including a filter capacitor, a smoothing capacitor, a reactor, and an input unit, it is necessary to devise the arrangement of these components in order to achieve a reduction in overall height while simplifying wiring between the components. There is.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a power conversion device capable of achieving simplification and shortening of wiring.

One embodiment of the present invention is a power conversion device (1) that performs power conversion between direct current power and alternating current power,
An input unit (2) to which DC power is input;
A reactor (3) which constitutes a part of a booster (101) for boosting DC power input from the input unit;
A filter capacitor (41) for absorbing current ripple between the input unit and the booster unit;
A smoothing capacitor (42) for smoothing the DC voltage boosted by the boosting unit;
A switching circuit unit (5) including a plurality of switching elements,
The input unit, the smoothing capacitor, and the reactor are disposed at positions adjacent to the filter capacitor.
The above-mentioned filter capacitor, the above-mentioned input part, the above-mentioned smoothing capacitor, and the above-mentioned reactor are in a power converter which is arranged in the two-dimensional arrangement direction which is one two-dimensional spread direction.

  In the power converter, the input unit, the smoothing capacitor, and the reactor are disposed at positions adjacent to the filter capacitor. The filter capacitor, the input unit, the smoothing capacitor, and the reactor are arranged in the two-dimensional arrangement direction. Thus, the wiring can be simplified and its height can be reduced. That is, by arranging as described above, the wiring between the filter capacitor, the smoothing capacitor, the reactor, and the input unit can be shortened. As a result, the wiring can be simplified easily. Further, by arranging the filter capacitor, the input unit, the smoothing capacitor, and the reactor in the two-dimensional array direction, the height can be reduced in the direction orthogonal to the two-dimensional array direction.

As described above, according to the above aspect, it is possible to provide a power conversion device capable of achieving simplification and shortening of wiring.
The reference numerals in parentheses described in the claims and the means for solving the problems indicate the correspondence with the specific means described in the embodiments described later, and the technical scope of the present invention is limited. It is not a thing.

FIG. 2 is a plan view of the power conversion device according to the first embodiment. FIG. 1 is a circuit diagram of a power conversion device according to a first embodiment. III-III arrow directional cross-sectional view of FIG. IV-IV arrow directional cross-sectional view of FIG. V-V arrow directional cross-sectional view of FIG. FIG. 2 is an explanatory plan view showing connection wiring of the power conversion device in Embodiment 1. FIG. 7 is a plan view of the power conversion device in a second embodiment. The plane explanatory view of the power converter in a 3rd embodiment. The plane explanatory view of the power converter in a 4th embodiment. The plane explanatory view of the power converter in a 5th embodiment. The plane explanatory view of the power converter in a 6th embodiment. Plane | planar explanatory drawing which shows arrangement | sequence of a filter capacitor, an input part, a smoothing capacitor, and a reactor in Embodiment 7. FIG. The plane explanatory drawing which shows the other arrangement | sequence of a filter capacitor, an input part, a smoothing capacitor, and a reactor in Embodiment 7. FIG.

(Embodiment 1)
Embodiments of the power converter will be described with reference to FIGS. 1 to 6.
The power conversion device 1 of the present embodiment performs power conversion between direct current power and alternating current power.
As illustrated in FIG. 1, the power conversion device 1 includes an input unit 2, a reactor 3, a filter capacitor 41, a smoothing capacitor 42, and a switching circuit unit 5.

  As shown in FIG. 2, the input unit 2 is a portion to which direct current power is input. The reactor 3 constitutes a part of a boosting unit 101 that boosts the DC power input from the input unit 2. The filter capacitor 41 absorbs the ripple of the current between the input unit 2 and the booster unit 101. The smoothing capacitor 42 smoothes the DC voltage boosted by the booster unit 101. The switching circuit unit 5 includes a plurality of switching elements 50u and 50d.

  As shown in FIG. 1, the input unit 2, the smoothing capacitor 41, and the reactor 3 are disposed at a position adjacent to the filter capacitor 41. As shown in FIGS. 1 and 3 to 5, the filter capacitor 41, the input unit 2, the smoothing capacitor 42, and the reactor 3 are arranged in a two-dimensional array direction which is one two-dimensional spread direction. .

  That is, the filter capacitor 41, the input unit 2, the smoothing capacitor 42, and the reactor 3 are arranged in a direction along a two-dimensional plane parallel to the paper surface of FIG. The direction parallel to this two-dimensional plane is the two-dimensional array direction. Further, the normal direction of the two-dimensional plane, that is, the direction orthogonal to the two-dimensional arrangement direction is appropriately referred to as the Z direction.

As shown in FIG. 2, the power conversion device 1 of the present embodiment has a booster unit 101 and an inverter unit 102. Then, power conversion between DC power and AC power is performed between the DC power supply B and the three-phase AC rotary electric machine MG.
The power conversion device 1 is connected to a DC power supply B at the input unit 2. A filter capacitor 41 is connected to the wiring between the input unit 2 and the booster unit 101. When the DC power supply B is connected to the input unit 2, the pair of terminals of the filter capacitor 41 are connected to the positive electrode and the negative electrode of the DC power supply B.

  The booster unit 101 has a reactor 3 and a switching element 50 u on the upper arm side and a switching element 50 d on the lower arm side connected in series with each other. One terminal of the reactor 3 is connected to the positive electrode of the DC power supply B. The other terminal of the reactor 3 is connected to a connection point between the switching element 50u on the upper arm side and the switching element 50d on the lower arm side.

  The inverter unit 102 includes three-phase legs. That is, the three-phase legs are connected in parallel with each other between the positive electrode wire WP and the negative electrode wire WN. Each leg is formed by the upper arm side switching element 50 u and the lower arm side switching element 50 d connected in series.

  The connection point of the two switching elements 50u and 50d in each leg is connected to three electrodes of the rotary electric machine MG via the output wiring WO. A smoothing capacitor 42 is connected between the booster unit 101 and the inverter unit 102 so as to suspend the positive electrode wire WP and the negative electrode wire WN. In addition, flywheel diodes are connected in reverse parallel to the switching elements 50u and 50d.

  The switching elements 50u and 50d can be formed of IGBTs. Here, IGBT is an abbreviation for Insulated Gate Bipolar Transistor, that is, an insulated gate bipolar transistor. The switching element can also be a MOSFET. MOSFET is an abbreviation for Metal Oxide Semiconductor Field Effect Transistor, or metal oxide field effect transistor.

  As shown in FIG. 1, the input unit 2, the smoothing capacitor 42, and the reactor 3 are disposed at positions adjacent to the filter capacitor 41 from mutually different directions. That is, the input unit 2, the smoothing capacitor 42, and the reactor 3 are disposed to face the filter capacitor 3 from three different directions in the direction orthogonal to the Z direction. In the present embodiment, the smoothing capacitor 42 is disposed adjacent to the filter capacitor 41 in one direction orthogonal to the Z direction. The direction in which the filter capacitor 41 and the smoothing capacitor 42 are arranged is appropriately referred to as the X direction.

  Further, the input unit 2 is adjacent to the filter capacitor 41 on the side opposite to the side where the smoothing capacitor 42 is disposed in the X direction. That is, as shown in FIGS. 1 and 5, the input unit 2, the filter capacitor 41, and the smoothing capacitor 42 are arranged in a substantially straight line in the X direction. The input unit 2 is an input connector integrally provided with a positive electrode terminal and a negative electrode terminal electrically connected to the positive electrode and the negative electrode of the DC power supply B.

  Further, as shown in FIGS. 1 and 3, the reactor 3 is adjacent to the filter capacitor 41 in the direction orthogonal to both the Z direction and the X direction. The direction orthogonal to both the Z direction and the X direction is appropriately referred to as the Y direction.

  As shown in FIGS. 3 to 5, each of the filter capacitor 41, the input unit 2, the smoothing capacitor 42, and the reactor 3 is such that at least a part in the Z direction overlaps with the other three components in the two-dimensional array direction. It has become an arrangement. That is, a virtual plane having a normal in the Z direction that intersects all of the filter capacitor 41, the input unit 2, the smoothing capacitor 42, and the reactor 3 necessarily exists. Further, in the present embodiment, as shown in FIG. 1, the filter capacitor 41, the input unit 2, the smoothing capacitor 42, and the reactor 3 are two-dimensionally arranged so as not to overlap with each other when viewed from the Z direction. .

  As shown in FIG. 3 and FIG. 4, the reactor 3 is configured by projecting at least a pair of reactor terminals 31 in a direction orthogonal to the two-dimensional array direction, that is, in the Z direction. In the present embodiment, the reactor 3 has a pair of reactor terminals 31. However, multiple pairs of reactor terminals 31 may be provided.

  As shown in FIG. 1, the switching circuit unit 5 is disposed at a position adjacent to the smoothing capacitor 42 in the two-dimensional array direction. The reactor 3 is disposed at a position adjacent to the switching circuit unit 5 in a direction orthogonal to the arranging direction of the switching circuit unit 5 and the smoothing capacitor 42 in the two-dimensional array direction. In the present embodiment, the alignment direction of the switching circuit unit 5 and the smoothing capacitor 42 is the Y direction. Therefore, the reactor 3 is adjacent to the switching circuit unit 5 in the X direction.

  The switching circuit unit 5 has a plurality of semiconductor modules 51. A part of the plurality of semiconductor modules 51 is a boosting semiconductor module 51 a that constitutes a part of the boosting unit 101. The boosting semiconductor module 51 a is disposed on the side closer to the reactor 3 in the switching circuit unit 5. That is, among the plurality of semiconductor modules 51 constituting the switching circuit unit 5, the boosting semiconductor module 51 a is disposed at a position closest to the reactor 3.

  As shown in FIG. 2, the power conversion device 1 further includes a boost current sensor 61. The boosting current sensor 61 detects the current flowing to the boosting unit 101. Then, as shown in FIG. 1, the boost current sensor 61 is disposed adjacent to the reactor 3. In the present embodiment, the boost current sensor 61 is disposed at a position adjacent to the reactor 3 in the X direction.

  As shown in FIG. 2, the power conversion device 1 further includes an output current sensor 62. The output current sensor 62 detects an output current in the output wiring WO connected to the rotary electric machine MG which is an AC load. Further, as shown in FIG. 1, the output current sensor 62 is disposed at a position adjacent to the switching circuit unit 5 in the two-dimensional array direction. In the present embodiment, the output current sensor 62 is disposed at a position adjacent to the switching circuit unit 5 in the Y direction.

  The boost current sensor 61 and the output current sensor 62 are integrated with each other to constitute a sensor module 6. The sensor module 6 is disposed adjacent to the switching circuit unit 5 and the reactor 3 in the two-dimensional array direction. In the present embodiment, the sensor module 6 is adjacent to the reactor 3 in the X direction, and adjacent to the switching circuit unit 5 in the Y direction.

  The switching circuit unit 5 includes a cooler 52 that cools the switching elements 50 u and 50 d. The cooler 52 includes a refrigerant introduction part 522 for introducing a refrigerant, and a refrigerant discharge part for discharging the refrigerant. At least one of the refrigerant introduction portion 522 and the refrigerant discharge portion is disposed at a position adjacent to the switching circuit unit 5 in the two-dimensional arrangement direction. In the present embodiment, the refrigerant introducing unit 522 is disposed at a position adjacent to the switching circuit unit 5. Moreover, in FIG. 1, the refrigerant | coolant discharge part does not appear.

  In addition, although the power converter device 1 of this embodiment abbreviate | omits illustration, for example, the refrigerant flow path is provided also in parts other than the reactor 3 grade | etc., Switching circuit part 5. FIG. The refrigerant discharge portion of the cooler 52 in the switching circuit unit 5 is connected to the refrigerant flow path. And the discharge pipe 121 is provided so that the refrigerant | coolant which passed the refrigerant | coolant flow path in the power converter device 1 may be discharged | emitted from the power converter device 1. As shown in FIG. The exhaust pipe 121 is provided at a position adjacent to the reactor 3 in the Y direction. The discharge pipe 121 protrudes from the housing 11 in the Y direction.

  The semiconductor module 51 incorporates the switching elements 50u and 50d. In the present embodiment, the upper arm switching element 50 u and the lower arm switching element 50 d connected in series with each other are incorporated in one semiconductor module 51. The semiconductor module 51 has a card shape having a main surface in the X direction. The semiconductor module 51 projects the power terminal 511 on one side in the Z direction. As shown in FIG. 1, each semiconductor module 51 has three power terminals 511. The three power terminals 511 are connected to the positive electrode wire WP, the negative electrode wire WN, and the output wire WO, respectively. The projecting directions of the power terminals 511 in the semiconductor module 51 are the same in the Z direction. The protruding direction of the power terminal 511 is the same as the protruding direction of the reactor terminal 31.

  The cooler 52 is provided with a plurality of cooling pipes 521. The switching circuit unit 5 is formed by stacking a plurality of semiconductor modules 51 and a plurality of cooling pipes 521. At least one of the refrigerant introduction part 522 and the refrigerant discharge part arranged at a position adjacent to the switching circuit part 5 is provided such that the projecting direction from the switching circuit part 5 is the stacking direction of the switching circuit part 5 . That is, in the present embodiment, the protrusion direction of the refrigerant introduction portion 522 from the switching circuit unit 5 is the X direction.

  As shown in FIG. 1 and FIG. 4, the switching circuit unit 5 has a pressing member 53 for pressing the stacked portion of the plurality of semiconductor modules 51 and the plurality of cooling pipes 521 in the stacking direction. The reactor 3 and the switching circuit unit 5 are disposed adjacent to each other in the stacking direction. The pressure member 53 is disposed on the side of the reactor 3 in the switching circuit unit 5.

  In the present embodiment, the pressing member 53 presses the stacked portion of the plurality of semiconductor modules 51 and the plurality of cooling pipes 52 in the X direction. The pressurizing member 53 is disposed between the stacked unit and the reactor 3 in the X direction. The pressure member 53 is made of, for example, an elastic member such as a leaf spring. The pressing member 53 is disposed in a compressed state between one end of the stacked portion in the X direction and a support wall (not shown). Thereby, the pressing member 53 presses the stacked portion in the X direction. The support wall can be formed as part of the housing 11.

  The filter capacitor 41, the input unit 2, the smoothing capacitor 42, and the reactor 3 are fixed to a case body 110 which is a common case member. As shown in FIGS. 1 and 3 to 5, the power conversion device 1 accommodates a filter capacitor 41, a smoothing capacitor 42, and a reactor 3 in a housing 11. Further, a part of the input unit 2 is disposed in the housing 11, and the other part protrudes from the housing 11. Further, in the housing 11, the switching circuit unit 5, the sensor module 6, and other components of the power conversion device 1 are accommodated.

The casing 11 has a casing main body 110 provided with an opening on both sides in the Z direction, and an upper lid 111 and a lower lid 112 that close each opening. The upper lid 111 and the lower lid 112 are each fixed to the housing body 110. The casing body 110 is made of metal such as aluminum alloy. The casing body 110 is an integral member. The housing body 110 has side walls extending in the direction orthogonal to the Z direction, ie, the entire circumference in the two-dimensional array direction. As described above, the input unit 2, the smoothing capacitor 42, and the reactor 3 are fixed to one case body 110 which is an integral member. The input unit 2, the smoothing capacitor 42, and the reactor 3 are fixed by fastening members such as bolts (not shown).
Furthermore, in the present embodiment, the switching circuit unit 5 and the sensor module 6 are also fixed to the housing body 110.

  As shown in FIGS. 1 and 5, the filter capacitor 41 and the smoothing capacitor 42 are integrated with each other to constitute a capacitor module 4. The capacitor module 4 incorporates a plurality of capacitor elements. And these capacitor elements are integrated by mold resin. A part of the plurality of capacitor elements is the filter capacitor 41, and another part of the capacitor elements is the smoothing capacitor 42. In the present embodiment, the filter capacitor 41 and the smoothing capacitor 42 are arranged adjacent to each other in the X direction and integrated to configure the capacitor module 4.

Next, the operation and effect of the present embodiment will be described.
In the power converter 1, the input unit 2, the smoothing capacitor 42, and the reactor 3 are disposed at a position adjacent to the filter capacitor 41. The filter capacitor 41, the input unit 2, the smoothing capacitor 42, and the reactor 3 are arranged in a two-dimensional array direction. Thus, the wiring can be simplified and its height can be reduced.

  That is, by arranging as described above, as shown in FIG. 6, the wiring WF between the filter capacitor 41, the smoothing capacitor 42, the reactor 3, and the input unit 2 can be shortened. As a result, the wiring can be simplified easily. Further, by arranging the filter capacitor 41, the input unit 2, the smoothing capacitor 42, and the reactor 3 in the two-dimensional arrangement direction, the height reduction in the direction orthogonal to the two-dimensional arrangement direction, that is, the Z direction is achieved. FIG. 6 is a schematic view, and the wiring WF and the like also schematically show schematic routes.

  The input unit 2, the smoothing capacitor 42, and the reactor 3 are disposed at positions adjacent to the filter capacitor 41 from mutually different directions. Thereby, it is easy to realize the reduction in height of the power conversion device 1 while shortening the connection wiring between the filter capacitor 41 and the other components.

  The reactor 3 protrudes at least a pair of reactor terminals 31 in a direction orthogonal to the two-dimensional array direction. Thereby, connection with the connection wiring connected to reactor terminal 31 and reactor 3 can be performed easily. That is, it is possible to prevent reactor terminal 31 from being disposed between the main body of reactor 3 and other components. Therefore, the work such as welding between the reactor terminal 31 and the connection wiring can be easily performed. In addition, since the routing of the connection wiring can be easily simplified, the connection wiring can be further shortened.

  Further, the switching circuit unit 5 is disposed at a position adjacent to the smoothing capacitor 42. Thereby, the connection wiring (i.e., the positive electrode wiring WP and the negative electrode wiring WN) between the smoothing capacitor 42 and the switching circuit unit 5 can be shortened. Thereby, the inductance can be further reduced.

  The reactor 3 is disposed at a position adjacent to the switching circuit unit 5 in a direction orthogonal to the direction in which the switching circuit unit 5 and the smoothing capacitor 42 are aligned. The boosting semiconductor module 51 a is disposed on the side closer to the reactor 3 in the switching circuit unit 5. Thereby, the connection wiring WL between the reactor 3 and the semiconductor module 51a for boosting can be shortened. As a result, the power converter 1 can be further miniaturized.

  Further, the boost current sensor 61 is disposed at a position adjacent to the reactor 3. As a result, even if the connection wire WL connected to the reactor 3 in the booster unit 101 is not elongated, the boosted current sensor 61 can be easily provided in the connection wire WL. As a result, the connection wiring WL can be shortened, and the power converter 1 can be further miniaturized.

  The output current sensor 62 is disposed adjacent to the switching circuit unit 5. As a result, even if the output wiring WO connected to the switching circuit unit 5 is not elongated, the output current sensor 62 can be easily provided on the output wiring WO. As a result, the output wiring WO can be shortened, and the miniaturization of the power conversion device 1 can be facilitated.

  The boost current sensor 61 and the output current sensor 62 are integrated with each other to constitute a sensor module 6. The sensor module 62 is disposed adjacent to the switching circuit unit 5 and the reactor 3. Thereby, further miniaturization of the power conversion device 1 and simplification of the connection wirings WL and WO can be achieved. That is, by consolidating the boosted current sensor 61 and the output current sensor 62 into one sensor module 6, the number of parts can be reduced and the space can be saved. Then, by arranging the sensor module 6 at a position adjacent to both the switching circuit unit 5 and the reactor 3, the wires connected to each of the sensor module 62 can be shortened. That is, the boosted current sensor 61 and the output current sensor 62 can be provided on the respective wires WL and WO without increasing the length of these wires.

  The refrigerant introducing unit 522 is disposed at a position adjacent to the switching circuit unit 5 in the two-dimensional arrangement direction. Thereby, the distance from the main body of the cooler 52 to the refrigerant introduction portion 522 can be shortened. As a result, downsizing of the power conversion device 1 and reduction in height in the Z direction can be easily realized. Moreover, it is easy to reduce the pressure loss of the refrigerant.

  The refrigerant introduction portion 522 is provided such that the protruding direction from the switching circuit unit 5 is the stacking direction of the switching circuit unit 5. Thus, the connection between the main body portion of the cooler 52 and the refrigerant introduction portion 522 is facilitated, and the height reduction of the power conversion device 1 in the Z direction is further facilitated.

  The reactor 3 and the switching circuit unit 5 are disposed adjacent to each other in the stacking direction, and the pressure member 53 is disposed on the side of the reactor 3 in the switching circuit unit 5. Thereby, the thermal interference between the reactor 3 and the switching circuit unit 5 can be alleviated by the pressing member 53 having a function of pressing the stacked portion. That is, the thermal interference between the reactor 3 and the switching circuit unit 5 can be suppressed without increasing the number of parts. As a result, the power converter 1 can be further miniaturized.

  The filter capacitor 41, the input unit 2, the smoothing capacitor 42, and the reactor 3 are fixed to a case body 110 which is a common case member. This makes it easy to ensure the durability of the housing 11 against vibration and the like. That is, for example, the capacitor module 4 (that is, the module of the filter capacitor 41 and the smoothing capacitor 42), which are both heavy articles, and the reactor 3 are divided into the case body 110 and the upper cover 111 or the lower cover 112. When fixed, the housing 11 needs to have particularly high durability. In particular, it is necessary to increase the strength of the fastening portion or the like between the housing members. On the other hand, it is easy to ensure the durability of the case 11 by fixing all the components to the single case body 110 which is a common case member.

  The filter capacitor 41 and the smoothing capacitor 42 are integrated with each other to constitute a capacitor module 4. Thereby, the number of parts can be reduced. Moreover, thereby, size reduction of the power converter device 1 can be achieved easily, and productivity can be improved. Further, the connection wiring between the filter capacitor 41 and the smoothing capacitor 42 can be further shortened.

  As described above, according to the present embodiment, it is possible to provide a power conversion device capable of achieving simplification and shortening of wiring.

Second Embodiment
In the present embodiment, as shown in FIG. 7, the sensor module 6 is disposed at a position adjacent to the switching circuit unit 5 and the reactor 3 from the same direction.
The sensor module 6 is disposed in the same direction in the Y direction with respect to the switching circuit unit 5 and the reactor 3. The sensor module 6 is disposed on the opposite side of the switching circuit unit 5 and the reactor 3 to the capacitor module 4.

  In the sensor module 6, the boost current sensor 61 is disposed closer to the reactor 3 in the X direction, and the output current sensor 62 is disposed closer to the reactor 3 in the X direction. Further, the boost current sensor 61 is disposed adjacent to the reactor 3 in the Y direction. The output current sensor 62 is disposed adjacent to the switching circuit unit 5 in the Y direction.

  The other configuration is the same as that of the first embodiment. In FIG. 7, the switching circuit unit 5 is illustrated in a simplified manner. Further, the refrigerant introduction unit 522 and the like are also omitted. Further, among the reference numerals used in the second and subsequent embodiments, the same reference numerals as those used in the previous embodiments represent the same constituent elements and the like as those in the previous embodiments unless otherwise indicated.

  Also in the present embodiment, the wiring can be simplified and the height can be reduced. In addition, it has the same operation effect as Embodiment 1.

(Embodiment 3)
This embodiment is a form of the power converter device 1 provided with multiple reactors 3 as shown in FIG. The plurality of reactors 3 are arranged mutually in a two-dimensional array direction.

  That is, power converter 1 of this form is equivalent to what divided the reactor in power converter 1 of Embodiment 1 into two or more, and has arranged. In the present embodiment, two reactors 3 are provided. However, the number of reactors 3 is not particularly limited, and three or more reactors may be arranged.

The plurality of reactors 3 are arranged in the same direction as the arrangement direction of the filter capacitors 41 and the reactors 3. That is, the plurality of reactors 3 are arranged adjacent to each other in the Y direction. The filter capacitor 41 and one reactor 3 are disposed adjacent to each other in the Y direction. The plurality of reactors 3 are connected in parallel to one another.
The other configuration is the same as that of the first embodiment.

  In the present embodiment, the inductance can be adjusted by adjusting the number of reactors 3. Therefore, the design change such as the output change of the power conversion device 1 can be easily coped with by changing the number of reactors 3.

The plurality of reactors 3 are arranged in the same direction as the direction in which the filter capacitors 41 and the reactors 3 are arranged. As a result, the connection wiring between the plurality of reactors 3 and the filter capacitor 41 can be easily simplified.
In addition, it has the same operation effect as Embodiment 1.

(Embodiment 4)
In this embodiment, as shown in FIG. 9, it is a form of the power converter device 1 provided with multiple smoothing capacitors 42. As shown in FIG. The plurality of smoothing capacitors 42 are arranged in a two-dimensional array direction.

  That is, power converter 1 of this form is equivalent to what divided smoothing capacitor 42 in power converter 1 of Embodiment 1 into plurality, and was arranged. In the present embodiment, three smoothing capacitors 42 are provided. However, the number of smoothing capacitors 42 is not particularly limited, and may be two or four or more. Further, in the present embodiment, the filter capacitor 41 and the smoothing capacitor 42 are provided separately from each other, and the capacitor module 4 is not configured.

  The plurality of smoothing capacitors 42 are arranged in the same direction as the arrangement direction of the filter capacitors 41 and the smoothing capacitors 42. That is, the plurality of smoothing capacitors 42 are arranged in the X direction. The plurality of smoothing capacitors 42 are arranged adjacent to each other in the X direction. The filter capacitor 41 and one smoothing capacitor 42 are disposed adjacent to each other in the X direction.

Further, the X direction which is the arrangement direction of the plurality of smoothing capacitors 42 is also the stacking direction of the plurality of semiconductor modules 51 in the switching circuit unit 5. The plurality of smoothing capacitors 51 are connected to suspend the positive electrode wire WP and the negative electrode wire WN, respectively.
The other configuration is the same as that of the first embodiment.

  In the present embodiment, the capacitance can be adjusted by adjusting the number of smoothing capacitors 42. Therefore, the design change such as the output change of the power conversion device 1 can be easily coped with by changing the number of smoothing capacitors 42.

The plurality of smoothing capacitors 42 are arranged in the same direction as the direction in which the filter capacitors 41 and the smoothing capacitors 42 are arranged. As a result, the connection wiring between the plurality of smoothing capacitors 42 and the filter capacitor 41 can be simplified. Further, since the arrangement direction of the plurality of smoothing capacitors 42 is the same as the stacking direction of the plurality of semiconductor modules 51 in the switching circuit unit 5, it is easy to divide the plurality of semiconductor modules 51 into the plurality of smoothing capacitors 42 and connect them easily. . As a result, the switching surge in each semiconductor module 51 can be easily reduced.
In addition, it has the same operation effect as Embodiment 1.

Embodiment 5
This embodiment is a form of the power converter device 1 provided with multiple reactors 3 and multiple smoothing capacitors 42, as shown in FIG. The plurality of reactors 3 and the plurality of smoothing capacitors 42 are arranged in a two-dimensional array direction.
That is, the present embodiment is a form in which the third embodiment and the fourth embodiment are combined.
The other configuration is the same as that of the first embodiment.

  In the present embodiment, it is possible to obtain an effect obtained by combining the effects of the third embodiment and the effects of the fourth embodiment. In addition, it has the same operation effect as Embodiment 1.

Embodiment 6
This embodiment is a form of the power converter device 1 in which the reactor 3 was equipped with the refrigerant | coolant flow path 32 which distribute | circulates a refrigerant | coolant, as shown in FIG. At least a part of the refrigerant flow path 32 is formed at a position adjacent to the filter condenser 41.

  In the present embodiment, the coolant channel 32 is formed over the entire circumference of the reactor 3 as viewed in the Z direction. In addition, the refrigerant channel 32 is integrally formed with the reactor 3. Along with this, the refrigerant flow path 32 is formed at a position adjacent to the switching circuit unit 5 in the reactor 3 and also at a position adjacent to the sensor module 6.

Further, the refrigerant flow path 32 of the reactor 3 is connected to the cooler 52 of the switching circuit unit 5. That is, the refrigerant discharge portion of the cooler 52 is directly or indirectly connected to the refrigerant flow path 32 of the reactor 3. In addition, the refrigerant flow path 32 is connected to the discharge pipe 121 directly or indirectly.
As a result, the refrigerant introduced from the refrigerant introduction part 522 passes through the cooler 52 of the switching circuit part 5, is introduced into the refrigerant flow path 32 of the reactor 3, and is discharged from the discharge pipe 121.
The other configuration is the same as that of the first embodiment.

In the present embodiment, the temperature rise of the reactor 3 can be effectively suppressed. Then, thermal interference between the reactor 3 and the filter capacitor 41 can be suppressed. Moreover, the thermal interference between the reactor 3 and the switching circuit unit 5 and the thermal interference between the reactor 3 and the sensor module 6 can also be suppressed.
In addition, it has the same operation effect as Embodiment 1.

Seventh Embodiment
In the present embodiment, as shown in FIGS. 12 and 13, variations of the arrangement of the filter capacitor 41, the input unit 2, the smoothing capacitor 42, and the reactor 3 are shown. In addition, in FIG. 12, FIG. 13, except the said 4 components, it is abbreviate | omitting.

  In the arrangement shown in FIG. 12, the reactor 3 is disposed at a position adjacent to the filter capacitor 41 in the X direction, and the input unit 2 is disposed at a position adjacent to the filter capacitor 41 in the Y direction. . Then, in the X direction, the smoothing capacitor 42 is disposed adjacent to the filter capacitor 41 on the opposite side to the reactor 3.

  In the arrangement shown in FIG. 13, the reactor 3 is disposed at a position adjacent to the filter capacitor 41 in the Y direction. The input unit 2 is adjacent to the filter capacitor 41 on the opposite side to the reactor 3 in the Y direction. The smoothing capacitor 42 is disposed adjacent to the filter capacitor 41 in the X direction.

In both the arrangement shown in FIG. 12 and the arrangement shown in FIG. 13, the filter capacitor 41, the input unit 2, the smoothing capacitor 42, and the reactor 3 are arranged in one two-dimensional arrangement direction. Further, the input unit 2, the smoothing capacitor 42, and the reactor 3 are arranged adjacent to the filter capacitor 41.
The other configuration is the same as that of the first embodiment.
Also in the present embodiment, it is possible to provide a power converter capable of achieving simplification and shortening of wiring.

  The present invention is not limited to the above embodiments, and can be applied to various embodiments without departing from the scope of the invention.

DESCRIPTION OF SYMBOLS 1 Power converter 101 Booster 2 Input part 3 Reactor 41 Filter capacitor 42 Smoothing capacitor 5 Switching circuit part

Claims (19)

A power converter (1) for performing power conversion between DC power and AC power, comprising:
An input unit (2) to which DC power is input;
A reactor (3) which constitutes a part of a booster (101) for boosting DC power input from the input unit;
A filter capacitor (41) for absorbing current ripple between the input unit and the booster unit;
A smoothing capacitor (42) for smoothing the DC voltage boosted by the boosting unit;
A switching circuit unit (5) including a plurality of switching elements,
The input unit, the smoothing capacitor, and the reactor are disposed at positions adjacent to the filter capacitor.
The power conversion device, wherein the filter capacitor, the input unit, the smoothing capacitor, and the reactor are arranged in a two-dimensional array direction that is one two-dimensional spread direction.   The power conversion device according to claim 1, wherein the input unit, the smoothing capacitor, and the reactor are disposed at positions adjacent to the filter capacitor from mutually different directions.   The power converter according to claim 1 or 2, wherein the reactor has at least a pair of reactor terminals (31) projected in a direction orthogonal to the two-dimensional array direction.   The power conversion device according to any one of claims 1 to 3, wherein the switching circuit unit is disposed at a position adjacent to the smoothing capacitor in the two-dimensional arrangement direction.   The reactor is disposed at a position adjacent to the switching circuit unit in a direction orthogonal to the arranging direction of the switching circuit unit and the smoothing capacitor in the two-dimensional array direction, and a plurality of the switching circuit units are provided. Of the semiconductor modules (51), and a part of the plurality of the semiconductor modules is the semiconductor module for boosting (51a) constituting a part of the booster, and the semiconductor module for boosting is the above-mentioned switching The power converter according to claim 4, wherein the power converter is disposed on the side closer to the reactor in the circuit section.   The power conversion device according to claim 5, further comprising a boosted current sensor (61) for detecting a current flowing through the booster, wherein the boosted current sensor is disposed at a position adjacent to the reactor.   An output current sensor (62) for detecting an output current in an output wiring connected to an AC load is further provided, and the output current sensor is disposed at a position adjacent to the switching circuit portion in the two-dimensional array direction The power converter device according to any one of claims 4 to 6.   The boosted current sensor and the output current sensor are integrated with each other to constitute a sensor module (6), and the sensor module is adjacent to the switching circuit unit and the reactor in the two-dimensional array direction. The power converter according to claim 7, which is disposed at a position.   The power conversion device according to claim 8, wherein the sensor module is disposed at a position adjacent to the switching circuit unit and the reactor in the same direction.   The switching circuit unit has a cooler (52) for cooling the switching element, and the cooler includes a refrigerant introduction unit (522) for introducing a refrigerant, and a refrigerant discharge unit for discharging the refrigerant, The power conversion according to any one of claims 4 to 9, wherein at least one of the refrigerant introducing unit and the refrigerant discharging unit is disposed at a position adjacent to the switching circuit unit in the two-dimensional arrangement direction. apparatus.   The cooler includes a plurality of cooling pipes (521), and the switching circuit unit is formed by stacking a plurality of semiconductor modules and a plurality of cooling pipes, and is disposed adjacent to the switching circuit unit. The power conversion device according to claim 10, wherein at least one of the refrigerant introduction part and the refrigerant discharge part is provided such that the protruding direction from the switching circuit part is the stacking direction of the switching circuit part.   The cooler includes a plurality of cooling pipes (521), and the switching circuit unit is formed by stacking a plurality of semiconductor modules (51) and a plurality of cooling pipes, and a plurality of the semiconductor modules and a plurality of the cooling pipes. The pressure member (53) for pressing the stack portion with the cooling pipe in the stacking direction is provided, and the reactor and the switching circuit portion are disposed adjacent to each other in the stacking direction, and the pressing member The power converter according to any one of claims 4 to 11, which is disposed on the reactor side in the switching circuit unit.   The power conversion device according to any one of claims 1 to 12, wherein the filter capacitor, the input unit, the smoothing capacitor, and the reactor are fixed to a common housing member (110). .   The power converter according to any one of claims 1 to 13, wherein the filter capacitor and the smoothing capacitor are integrated with each other to constitute a capacitor module (4).   The power conversion device according to any one of claims 1 to 14, wherein a plurality of the reactors are provided, and the plurality of reactors are arranged in the two-dimensional arrangement direction.   The power conversion device according to any one of claims 15 to 18, wherein the plurality of reactors are arranged in the same direction as the arrangement direction of the filter capacitor and the reactors.   The power conversion device according to any one of claims 1 to 16, further comprising a plurality of the smoothing capacitors, wherein the plurality of the smoothing capacitors are mutually arranged in the two-dimensional arrangement direction.   The power conversion device according to any one of claims 17 to 18, wherein the plurality of smoothing capacitors are arranged in the same direction as the arrangement direction of the filter capacitor and the smoothing capacitor.   The reactor according to any one of claims 1 to 18, wherein the reactor comprises a refrigerant flow path (32) for circulating a refrigerant, and at least a part of the refrigerant flow path is formed adjacent to the filter capacitor. Power converter according to claim 1.

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