JP6481505B2 - Power converter - Google Patents

Description

  The present invention relates to a power conversion device in which two power conversion modules are arranged in parallel.

  As a power conversion device in which two power conversion modules are arranged in parallel, there is one described in Patent Document 1 below. In the power conversion device described in Patent Literature 1, the same polarity of electrode terminals is connected between two power conversion modules.

Japanese Patent No. 4305537

  In the power conversion device of Patent Document 1, since the same polarity of electrode terminals are connected to each other between two power conversion modules, a conductive member used for connection is shortened. For this reason, for example, when the height of the installation position differs between the two power conversion modules due to the dimensional tolerance of the parts and the like and a step occurs, an excessive stress may be generated in the short conductive member.

  Then, this invention aims at relieving the stress which generate | occur | produces in the conduction | electrical_connection member which connects the same polarity of an electrode terminal.

In the present invention, between the first power conversion module and the second power conversion module, the first conduction member and the second conduction member that connect the same polarity are the first power conversion module and the second power conversion. It is characterized by crossing each other with the module.
At least one of the first conducting member and the second conducting member is bent so that the intersecting portions are separated from each other.

  According to the present invention, the first conducting member and the second conducting member are connected to the first power conversion module and the second power conversion module in close proximity to each other with the same poles connected to each other and do not cross each other. The path length between the electrode terminals becomes longer. Thereby, even if there is a level difference between the two power conversion modules due to dimensional tolerances of components, the stress generated in the first conductive member and the second conductive member can be relaxed.

It is a perspective view showing an outline to a power converter concerning a 1st embodiment of the present invention. (A) is a top view which shows the positional relationship with the 2nd bus bar of the 1st bus bar in 1st Embodiment, (b) is a side view of a 1st bus bar. It is a perspective view which shows an outline to the power converter device which concerns on 2nd Embodiment. (A) is a top view which shows the positional relationship with the 2nd bus bar of the 1st bus bar in 2nd Embodiment, (b) is a side view of a 1st bus bar. It is a perspective view which shows an outline to the power converter device which concerns on 3rd Embodiment. (A) is a top view which shows the positional relationship with the 2nd bus bar of the 1st bus bar in 3rd Embodiment, (b) is a side view of a 1st bus bar. It is a perspective view which shows an outline to the power converter device which concerns on 4th Embodiment. It is a perspective view of the 1st bus bar of a 4th embodiment. It is AA sectional drawing of FIG. It is a top view which shows an outline in the power converter device which concerns on 5th Embodiment.

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

  FIG. 1 is a perspective view showing an outline of the power conversion device according to the first embodiment of the present invention. The power conversion device of the embodiment includes a first power conversion module 1 and a second power conversion module 3. Although not illustrated, the first power conversion module 1 and the second power conversion module 3 include a power module that accommodates a power semiconductor element, a smoothing capacitor, a motor control board, and the like, and constitute an inverter, for example.

  Each of the first power conversion module 1 and the second power conversion module 3 has a rectangular shape in plan view, and is arranged in parallel on the flat plate-like cooler 7 in a state of being separated from each other. In the cooler 7, for example, a passage through which cooling water flows is provided, and the first power conversion module 1 and the second power conversion module 3 are cooled by the cooling water flowing through the passage.

  In each figure including FIG. 1 below, the arrangement direction of the first power conversion module 1 and the second power conversion module 3 is the X direction, and the installation surface of the first and second power conversion modules 1 and 3 with respect to the cooler 7 The direction perpendicular to the X direction on the parallel plane is defined as the Y direction.

  Three external output terminals 9, 11, 13 are provided side by side in the vicinity of the side portion along the Y direction at a position away from the second power conversion module 3 of the first power conversion module 1. Bus bars 15, 17, and 19 are connected to the external output terminals 9, 11, and 13, respectively, and the bus bars 15, 17, and 19 are connected to the first three-phase AC motor 21.

  Three external output terminals 23, 25, and 27 are provided side by side in the vicinity of the side portion along the Y direction at a position away from the first power conversion module 1 of the second power conversion module 3. Bus bars 29, 31 and 33 are connected to the external output terminals 23, 25 and 27, respectively, and the bus bars 29, 31 and 33 are connected to the second three-phase AC motor 35.

  Two first electrode terminals 37 and second electrode terminals 39 are provided near the side portion along the Y direction at a position close to the second power conversion module 3 of the first power conversion module 1. Are arranged side by side along the sides. The first electrode terminal 37 is a positive electrode and the second electrode terminal 39 is a negative electrode.

  On the other hand, two third electrode terminals 41 and a fourth electrode terminal 43 are connected to the second power conversion module in the vicinity of the side portion along the Y direction at the position close to the first power conversion module 1 of the second power conversion module 3. The modules 3 are arranged side by side along the side. The third electrode terminal 41 is a positive electrode and the fourth electrode terminal 43 is a negative electrode. The second power conversion module 3 relates to the arrangement of the electrode terminals, the fourth electrode terminal 43, the first electrode terminal 37, the second electrode terminal 39 along the direction in which the first electrode terminal 37 and the second electrode terminal 39 of the first power conversion module 1 are arranged in order. The three electrode terminals 41 are arranged in this order.

  The first electrode terminal 37 of the first power conversion module 1 and the fourth electrode terminal 43 of the second power conversion module 3 that are different in polarity from each other are arranged close to each other along the X direction. On the other hand, the second electrode terminal 39 of the first power conversion module 1 and the third electrode terminal 41 of the second power conversion module 3, which have different polarities, are arranged close to each other along the X direction.

  Therefore, the four electrode terminals of the first electrode terminal 37, the second electrode terminal 39, the third electrode terminal 41, and the fourth electrode terminal 43 are located at the four corners of the quadrangle.

  The first electrode terminal 37 and the third electrode terminal 41, both of which are positive, are connected by a first bus bar 45 as a first conductive member, and the second electrode terminal 39 and the fourth electrode terminal 43, both of which are negative, They are connected by a second bus bar 47 as a second conducting member. Therefore, the first bus bar 45 and the second bus bar 47 intersect each other between the first power conversion module 1 and the second power conversion module 3.

  A battery 49 serving as a DC power source is connected to the first bus bar 45 and the second bus bar 47. The direct current from the battery 49 is supplied to the first power conversion module 1 and the second power conversion module 3 via the first bus bar 45 and the second bus bar 47. The first power conversion module 1 and the second power conversion module 3 convert a direct current into an alternating current and supply the alternating current to the first three-phase AC motor 21 and the second three-phase AC motor 35, respectively.

  Next, the first bus bar 45 and the second bus bar 47 will be described in detail. The first bus bar 45 and the second bus bar 47 are used only with the front and back reversed as shown in FIG. 1 and have the same shape, so the first bus bar 45 will be mainly described.

  As shown in FIG. 2, the first bus bar 45 has terminal fixing portions 45 a and 45 b to which the first electrode terminal 37 and the third electrode terminal 41 are fixed, respectively, and the same plane with respect to the terminal fixing portions 45 a and 45 b. , And extending portions 45c and 45d that bend in a direction approaching each other. On the opposite side of the extension portions 45c and 45d to the terminal fixing portions 45a and 45b, there are provided vertical wall portions 45e and 45f that bend approximately 90 degrees toward the lower side of the cooler 7, as shown in FIG. It is done.

  The lower ends of the vertical wall portions 45e and 45f are connected by an intersecting portion 45g. As shown in FIG. 2A, the intersecting portion 45g and the extending portions 45c and 45d are located on the same straight line. The intersecting portion 45g is a portion that intersects with the intersecting portion 47g which is the same shape portion of the second bus bar 47. Since the crossing portions in the crossing state have the vertical wall portions, the directions orthogonal to the paper surface in FIG. 2A are separated from each other. Furthermore, the length of the intersecting portion (interval between the vertical wall portions) is sufficiently larger than the width of the mating bus bar so that the bus bars do not contact each other.

  In FIG. 2A, the second bus bar 47 is indicated by a two-dot chain line. In the same part as the first bus bar 45 of the second bus bar 47, lower case letters “a” to “g” similar to those of the first bus bar 45 are added to “47” to be “47a” to “47g”. .

  Thus, in the present embodiment, the first bus bar 45 that connects the positive electrodes and the second bus bar 47 that connects the negative electrodes are between the first power conversion module 1 and the second power conversion module 3. The intersections 45g and 47g intersect each other. For this reason, the first bus bar 45 and the second bus bar 47 are electrode terminals as compared with the case where the first power conversion module and the second power conversion module are connected in close proximity to each other and do not cross each other. The path length between them becomes longer.

  As a result, even if there is a step in the height direction (the direction perpendicular to the X direction and the Y direction) with respect to the mounting position on the cooler 7 due to the dimensional tolerance of parts between the two power conversion modules, the path length However, the stress generated in the first and second bus bars 45 and 47 can be relieved for a long time. Since the first bus bar 45 and the second bus bar 47 intersect with each other, even if the path length between the electrode terminals is increased, the interval between the first power conversion module 1 and the second power conversion module 3 may be small. This can contribute to downsizing of the entire apparatus.

  In the present embodiment, the first bus bar 45 and the second bus bar 47 have the same shape. For this reason, it is not necessary to manufacture a plurality of types of bus bars, which can contribute to a reduction in manufacturing cost.

  In the present embodiment, the first bus bar 45 and the second bus bar 47 are bent by the vertical wall portion so that the intersecting portions 45g and 47g intersecting each other are separated from each other. For this reason, the path length is further increased by the amount of bending, and the stress generated in the first bus bar 45 and the second bus bar 47 can be further relaxed.

  FIG. 3 is a perspective view showing an outline of the power conversion device according to the second embodiment of the present invention. The second embodiment differs from the first embodiment only in the first bus bar 45A and the second bus bar 47A. Other configurations are the same as those of the first embodiment. In FIG. 3, the motor and battery shown in FIG. 1 are omitted.

  Similar to the first embodiment, the first bus bar 45A and the second bus bar 47A are only used with their front and back reversed as shown in FIG. 45A will be described.

  As shown in FIG. 4, the first bus bar 45 </ b> A is flush with the terminal fixing portion 45 </ b> Aa as the connecting portion to which the first electrode terminal 37 is fixed and the terminal fixing portion 45 </ b> Aa, and with respect to the second electrode terminal 39. And an extended portion 45Ab as a first conductive member first portion that extends in a direction away from the top (upward in FIG. 4A). An upper protrusion 45Ac slightly protruding from the extension 45Ab toward the second power conversion module 3 (on the right side in FIG. 4) is provided, and the upper protrusion 45Ac is located below the cooler 7 (in FIG. 4A). A vertical wall portion 45Ad that bends approximately 90 degrees toward the back side of the drawing is provided.

  From the lower end of the vertical wall portion 45Ad, a lower projecting portion 45Af that slightly projects and extends toward the second power conversion module 3 (right side in FIG. 4A) is provided. The upper projecting portion 45Ac and the lower projecting portion 45Af constitute a first conducting member second portion extending from the extending portion 45Ab toward the second power conversion module 3.

  Further, as shown in FIG. 4, the first bus bar 45A has a terminal fixing portion 45Ag as a connecting portion to which the third electrode terminal 41 is fixed, and the fourth electrode terminal 43 in the same plane with respect to the terminal fixing portion 45Ag. And an extension portion 45Ah serving as a third portion of the first conductive member extending in a direction away from the bottom (downward in FIG. 4A). An upper protrusion 45Ai that slightly protrudes from the extension 45Ah toward the first power conversion module 1 (left side in FIG. 4A) is provided, and the upper protrusion 45Ai has a cooler 7 below (FIG. 4 ( A vertical wall portion 45Aj that bends approximately 90 degrees toward the rear side of the paper surface of a) is provided.

  From the lower end of the vertical wall 45Aj, there is provided a lower protrusion 45Ak that slightly protrudes and extends toward the first power conversion module 1 (left side in FIG. 4A). The upper projecting portion 45Ai and the lower projecting portion 45Ak constitute a first conductive member fourth portion extending from the extended portion 45Ah toward the first power conversion module 1.

  The opposite side to the extension 45Ab of the lower protrusion 45Af and the opposite side to the extension 45Ah of the lower protrusion 45Ak are connected to each other by an intersection 45Am as the first conductive member fifth part. The intersecting portion 45Am is a portion that intersects with the intersecting portion 47Am that is the same shape portion of the second bus bar 47A. The intersecting portions in the intersecting state have the vertical wall portions, so that the directions orthogonal to the paper surface in FIG. 4A are separated from each other. Furthermore, the space | interval of the left-right direction in Fig.4 (a) of vertical wall parts is enough more than the width | variety (width in the left-right direction in Fig.4 (a)) in the crossing part of a bus bar so that bus bars may not contact. It is getting bigger.

  In FIG. 4A, the second bus bar 47A is indicated by a two-dot chain line. In the same part as the first bus bar 45A of the second bus bar 47A, lower case letters “a” to “o” similar to the first bus bar 45A are added to “47A” to be “47Aa” to “47Ao”. . The extension 47Ab is the second conducting member first part, the upper projecting part 47Ac and the lower projecting part 47Af are the second conducting member second part, and the extension 47Ah is the second conducting member third part, the upper projecting part 47Ai and the lower projecting part. 47Ak constitutes the second conductive member fourth part, and the crossing portion 47Am constitutes the second conductive member fifth part.

  Thus, in the second embodiment, the first bus bar 45 </ b> A that connects the positive electrodes and the second bus bar 47 </ b> A that connects the negative electrodes are between the first power conversion module 1 and the second power conversion module 3. Thus, the intersections 45Am and 47Am intersect each other. For this reason, the first bus bar 45A and the second bus bar 47A are compared to the case where the first power conversion module 1 and the second power conversion module 3 are connected in close proximity to each other and do not cross each other. The path length between the electrode terminals becomes longer.

  As a result, even if there is a step in the height direction (direction perpendicular to the X direction and the Y direction) with respect to the mounting position on the cooler 7 between the two power conversion modules due to dimensional tolerances of parts, etc. The stress generated in the bus bar 45A and the second bus bar 47A can be relaxed. Since the first bus bar 45A and the second bus bar 47A cross each other, even if the path length between the electrode terminals becomes long, the interval between the first power conversion module 1 and the second power conversion module 3 can be small. This can contribute to downsizing of the entire apparatus.

  In the second embodiment, as shown in FIG. 4A, the recess 45An is formed so that the straight line P connecting the centers (electrode terminal centers) of the terminal fixing portions 45Aa and 45Ag of the first bus bar 45A cross each other. , 45Ao are formed on the first bus bar 45A. The recesses 45An and 45Ao are cut out so as to be recessed in a direction away from each other on the terminal fixing portion 45Aa side and the terminal fixing portion 45Ag side. Accordingly, the intersection 45Am is formed longer along the side portions of the first and second power conversion modules 1 and 3. The same applies to the intersection 47Am of the second bus bar 47A.

  For this reason, the first bus bar 45A and the second bus bar 47A can make the path length between the electrode terminals longer, and can more reliably relieve the stress generated in the first bus bar 45A and the second bus bar 47A. .

  In the second embodiment, similarly to the first embodiment, the first bus bar 45A and the second bus bar 47A have the same shape. For this reason, it is not necessary to manufacture a plurality of types of bus bars, which can contribute to a reduction in manufacturing cost.

  In the second embodiment, the first bus bar 45A and the second bus bar 47A are bent by the vertical wall portion so that the intersecting portions 45Am and 47Am intersecting each other are separated from each other. For this reason, the path length is further increased by the amount of bending, and the stress generated in the first bus bar 45A and the second bus bar 47A can be further relaxed.

  FIG. 5 is a perspective view schematically showing a power converter according to the third embodiment of the present invention. In the third embodiment, the first bus bar 45B and the second bus bar 47B are different from the first embodiment, and an insulating member 51 is further added. Other configurations are the same as those of the first embodiment. In FIG. 5, the motor and the battery are omitted.

  In the third embodiment, the first bus bar 45B and the second bus bar 47B are brought close to or in contact with the surface of the plate-like electrically insulating member 51 disposed on the cooler 7.

  FIG. 6A shows the first bus bar 45B by a solid line and the second bus bar 47B by a two-dot chain line. The first bus bar 45B has a terminal fixing portion 45Ba fixed to the first electrode terminal 37, and a vertical wall portion bent toward the insulating member 51 downward (back side in FIG. 6A) from the terminal fixing portion 45Ba. 45Bb. Furthermore, the first bus bar 45B has a terminal fixing portion 45Bc fixed to the third electrode terminal 41, and a longitudinal direction that bends toward the insulating member 51 below the terminal fixing portion 45Bc (the back side in FIG. 6A). Wall part 45Bd.

  The vertical wall portion 45Bd is extended toward the fourth electrode terminal 43 in parallel with the side portion of the second power conversion module 3 in a separated state, and a vertical wall extension portion 45Be is provided. The vertical wall extension 45Be is a crossing portion that intersects the first power conversion module 1 and the second power conversion module 3 with respect to the vertical wall extension 47Be of the same shape portion described later of the second bus bar 47B. .

  The lower end of the vertical wall extension 45Be opposite to the vertical wall 45Bd (the end on the back side in FIG. 6A) and the lower end of the vertical wall 45Bb (the end on the back side in FIG. 6A) Are connected to each other by the cooled portion 45Bf. The lower surface of the cooled part 45Bf is close to or in contact with the surface of the insulating member 51. The insulating member 51 is disposed in a gap between the first power conversion module 1 and the second power conversion module 3 and is made of, for example, ceramic of a high heat conductive material.

  The second bus bar 47B includes a terminal fixing portion 47Ba fixed to the second electrode terminal 39 and a lower side from the terminal fixing portion 47Ba (in FIG. 6A, as shown by a two-dot chain line in FIG. 6A). And a vertical wall portion 47Bb bent toward the insulating member 51 on the back side. Further, the second bus bar 47B has a terminal fixing portion 47Bc fixed to the fourth electrode terminal 43, and a longitudinal direction bent toward the insulating member 51 downward (back side in FIG. 6A) from the terminal fixing portion 47Bc. Wall part 47Bd.

  The vertical wall portion 47Bd is extended toward the third electrode terminal 41 in parallel with being spaced from the vertical wall extension portion 45Be of the first bus bar 45B, and the vertical wall extension portion 47Be is provided. The vertical wall extension 47Be is located on the opposite side of the second power conversion module 3 with the vertical wall extension 45Be in between.

  The lower end of the vertical wall extension 47Be opposite to the vertical wall portion 47Bd (the end on the back side in FIG. 6A) and the lower end of the vertical wall portion 47Bb (the end on the back side in FIG. 6A). Are connected to each other by the cooled part 47Bf. The lower surface of the cooled part 47Bf is close to or in contact with the surface of the insulating member 51.

  In the third embodiment, the first bus bar 45B that connects the positive electrodes to each other and the second bus bar 47B that connects the negative electrodes to each other are crossed between the first power conversion module 1 and the second power conversion module 3. The vertical wall extensions 45Be and 47Be intersect each other. For this reason, the first bus bar 45B and the second bus bar 47B are connected to the first power conversion module 1 and the second power conversion module 3 with the same poles close to each other and do not cross each other. The path length between the electrode terminals becomes longer.

  As a result, even if there is a step in the height direction (direction perpendicular to the X direction and the Y direction) with respect to the mounting position on the cooler 7 between the two power conversion modules due to dimensional tolerances of parts, etc. The stress generated in the bus bar 45B and the second bus bar 47B can be relaxed. Since the first bus bar 45B and the second bus bar 47B cross each other, even if the path length between the electrode terminals becomes long, the interval between the first power conversion module 1 and the second power conversion module 3 can be small. This can contribute to downsizing of the entire apparatus.

  In the third embodiment, the cooled portion 45Bf of the first bus bar 45B and the cooled portion 47Bf of the second bus bar 47B are close to or in contact with the insulating member 51 disposed on the cooler 7. For this reason, as for the 1st bus bar 45B and the 2nd bus bar 47B, the cold heat of the cooler 7 is transmitted via the insulating member 51, and a temperature rise is suppressed. As a result, the first bus bar 45B and the second bus bar 47B have a small electric resistance, and an electric current flows efficiently, improving the reliability as a power conversion device.

  Since the first bus bar 45B and the second bus bar 47B are prevented from rising in temperature, the cross-sectional area can be further reduced, and the bus bar itself can be reduced in size and cost. Moreover, since the 1st bus bar 45B and the 2nd bus bar 47B are cooled, the temperature rise of the 1st power conversion module 1 and the 2nd power conversion module 3 is also suppressed. If the surface of the cooler 7 is electrically insulated, the insulating member 51 is unnecessary, and the cooled parts 45Bf and 47Bf are brought close to or in contact with the surface of the cooler 7.

  FIG. 7 is a perspective view schematically showing a power converter according to the fourth embodiment of the present invention. The fourth embodiment differs from the first embodiment only in the first bus bar 45C and the second bus bar 47C. Other configurations are the same as those of the first embodiment. In FIG. 7, the motor and the battery are omitted.

  In the fourth embodiment, like the first and second embodiments, the first bus bar 45C and the second bus bar 47C are used with the front and back reversed as shown in FIG. Since the shapes are the same, the first bus bar 45C will be mainly described.

  As shown in FIG. 8, the first bus bar 45 </ b> C includes the terminal fixing portion 45 </ b> Ca to which the first electrode terminal 37 is fixed, and the cooler 7 from the end of the terminal fixing portion 45 </ b> Ca on the second power conversion module 3 side. And a vertical wall portion 45Cb that bends approximately 90 degrees downward. Furthermore, the first bus bar 45 </ b> C has a terminal fixing part 45 </ b> Cc to which the third electrode terminal 41 is fixed, and an end of the terminal fixing part 45 </ b> Cc on the first power conversion module 1 side substantially downward toward the cooler 7. And a vertical wall portion 45Cd that bends 90 degrees.

  The end portion of the vertical wall portion 45Cb opposite to the terminal fixing portion 45Ca and the end portion of the vertical wall portion 45Cd opposite to the terminal fixing portion 45Cc are connected by an intersecting portion 45Ce. The intersecting portion 45Ce is a portion that intersects with the intersecting portion 47Ce that is the same shape portion of the second bus bar 47C. By having the vertical wall portion, the intersecting portions in the intersecting state are separated from each other in the direction orthogonal to the X direction and the Y direction. Furthermore, the space | interval of the X direction of vertical wall parts is made sufficiently larger than the width | variety (width | variety of a X direction) in the cross | intersection part of a bus bar so that bus bars may not contact.

  In the following description, lower-case letters “a” to “e” similar to those of the first bus bar 45C are added to the reference numeral “47C” in the same shape portion of the second bus bar 47C as the first bus bar 45C. 47Ca "to" 47Ce ".

  In the fourth embodiment, a direct current from a battery (not shown) is indicated by an arrow M at an intersection 45Ce of the first bus bar 45C as shown in FIG. It flows from left to right in FIG. Conversely, as indicated by the arrow N, a direct current flows from the right to the left in FIG. 9 at the intersection 47Ce of the second bus bar 47C.

  As described above, the intersecting portions 45Ce and 47Ce of the first bus bar 45C and the second bus bar 47C intersect so that currents flow in opposite directions. The intersecting portions 45Ce and 47Ce through which currents flow in opposite directions are arranged to face each other with a slight gap therebetween. When the currents flow in opposite directions at the intersections 45Ce and 47Ce, the magnetic fields generated by the flowing currents cancel each other, and the mutual inductance of the first bus bar 45C and the second bus bar 47C is reduced.

  By canceling the respective magnetic fields at the intersections 45Ce and 47Ce and reducing the mutual inductance, a smoothing capacitor (not shown) is provided only in one power conversion module, and the influence of noise and the like on the other is suppressed. The For this reason, it is not necessary to separately provide a smoothing capacitor in the first power conversion module 1 and the second power conversion module 3, and the number of components is reduced.

  In the fourth embodiment, as in the first to third embodiments, the first bus bar 45C and the second bus bar 47C intersect between the first power conversion module 1 and the second power conversion module 3. The portions 45Ce and 47Ce intersect each other. Therefore, the first and second bus bars 45C and 47C have the same path length between the electrode terminals, and can relieve the stress generated in the first and second bus bars 45C and 47C. An effect is obtained.

  FIG. 10: is a top view which shows an outline in the power converter device which concerns on the 5th Embodiment of this invention.

  In the first to fourth embodiments, the first electrode terminal 37 and the fourth electrode terminal 43 are in a positional relationship facing each other along the X direction, for example, as shown in FIG. The positional relationship between the second electrode terminal 39 and the third electrode terminal 41 is the same. That is, the first power conversion module 1 and the second power conversion module 3 having substantially the same shape are not shifted in the Y direction.

  In contrast, in the fifth embodiment, as shown in FIG. 10, the first power conversion module 1 and the second power conversion module 3 are shifted from each other in the Y direction. Accordingly, the first electrode terminal 37 and the fourth electrode terminal 43 are shifted in the Y direction, and the second electrode terminal 39 and the third electrode terminal 41 are shifted in the Y direction. The shapes of the first bus bar 45D and the second bus bar 47D are substantially the same as the first bus bar 45 and the second bus bar 47 of FIG.

  That is, the first bus bar 45D and the second bus bar 47D include intersections 45Dg and 47Dg that intersect each other. The intersections 45Dg and 47Dg are bent downward and upward, respectively, with respect to the portion where the electrode terminals are fixed, so as to be separated from each other, like the intersection of FIG.

  In the example of FIG. 10, the third electrode terminal 41 connected to the first electrode terminal 37 by the first bus bar 45D is located approximately in the middle between the first electrode terminal 37 and the second electrode terminal 39 in the Y direction. ing. Therefore, the first bus bar 45D has a shorter path length between the electrode terminals than the first bus bar 45 in FIG. 1, but is slanted with respect to the X direction. The second bus bar 47D has a longer path length than the second bus bar 47 of FIG.

  As described above, in the fifth embodiment, similarly to the first to fourth embodiments, the first bus bar 45D and the second bus bar 47D are connected to each other between the first power conversion module 1 and the second power conversion module 3. In the meantime, the intersections 45Dg and 47Dg intersect each other. For this reason, in the first and second bus bars 45D and 47D, the path length between the electrode terminals becomes long, and the generated stress can be relieved.

  In FIG. 10, the first electrode terminal 37 and the third electrode terminal 41 having the same polarity may be arranged to face each other along the X direction without shifting in the Y direction. In this case, the first bus bar 45D that connects the first electrode terminal 37 and the third electrode terminal 41 is linear and the path length is shortened. However, since the first bus bar 45D is bent so that the intersecting portion 45Dg is separated from the intersecting portion 47Dg of the second bus bar 47D, a longer path length can be secured.

  As mentioned above, although embodiment of this invention was described, these embodiment is only the illustration described in order to make an understanding of this invention easy, and this invention is not limited to the said embodiment. The technical scope of the present invention is not limited to the specific technical matters disclosed in the above embodiment, but includes various modifications, changes, alternative techniques, and the like that can be easily derived therefrom.

  For example, in each of the embodiments of FIGS. 1, 3, 7, and 10, the first bus bar and the second bus bar are separated from each other with respect to the direction orthogonal to the X direction and the Y direction at the intersection. Although both the first and second bus bars are bent, either one may be bent. In short, it is only necessary to bend so that the intersections of the first bus bar and the second bus bar are separated from each other.

  In each of the embodiments, the second power conversion module 3 relates to the arrangement of the electrode terminals, along the direction in which the first electrode terminals 37 and the second electrode terminals 39 of the first power conversion module 1 are arranged in this order. The electrode terminal 43 and the third electrode terminal 41 are arranged in this order. As a result, the first bus bar 45 connecting the first electrode terminal 37 and the third electrode terminal 41 and the second bus bar 47 connecting the second electrode terminal 39 and the fourth electrode terminal 43 are substantially X-shaped. Cross each other.

  On the other hand, the present invention can also be applied when the positions of the third electrode terminal 41 and the fourth electrode terminal 43 of the second power conversion module 3 are switched. In this case, the first bus bar that connects the first electrode terminal 37 and the third electrode terminal 41 and the second bus bar that connects the second electrode terminal 39 and the fourth electrode terminal 43 are simply linear. It becomes parallel and does not cross.

  In order to intersect, at least one of the first bus bar and the second bus bar is bent in a plane including the X direction and the Y direction. By bending, the path between the electrode terminals becomes longer, which can contribute to stress relaxation. At this time, at the intersection, as in the first embodiment of FIG. 1 and the second embodiment of FIG. 3, the first and second are separated from each other in the direction orthogonal to the X direction and the Y direction. At least one of the bus bars is bent in a direction orthogonal to the X direction and the Y direction.

DESCRIPTION OF SYMBOLS 1 1st power conversion module 3 2nd power conversion module 37 1st electrode terminal of 1st power conversion module 39 2nd electrode terminal of 1st power conversion module 41 3rd electrode terminal of 2nd power conversion module 43 2nd power conversion Module fourth electrode terminal 45, 45A, 45B, 45C, 45D First bus bar (first conductive member)
45g, 47g, 45Ce, 47Ce, 45Dg, 47Dg Intersection 45Aa, 45Ag, 47Aa, 47Ag Terminal fixing part (connection part)
45Ab First bus bar extension (first conductive member first part)
45Ac Upper protrusion of the first bus bar (second conducting member second part)
45Af Lower protrusion of the first bus bar (first conductive member second portion)
45Ah First bus bar extension (first conductive member third portion)
45Ai Upper protrusion of the first bus bar (first conductive member fourth portion)
45Ak Lower protrusion of the first bus bar (first conductive member fourth portion)
45 Am Crossing portion of the first bus bar (first conductive member fifth portion)
45Be, 47Be Vertical wall extension (intersection)
47, 47A, 47B, 47C, 47D Second bus bar (second conducting member)
47Ab Extension part of second bus bar (second conducting member first part)
47Ac Upper protrusion of the second bus bar (second conducting member second portion)
47Af Lower protrusion of second bus bar (second conductive member second portion)
47Ah Second bus bar extension (second conducting member third part)
47Ai Upper protrusion of the second bus bar (second conductive member fourth portion)
47Ak Lower protrusion of the second bus bar (second conductive member fourth portion)
47 Am Crossing portion of second bus bar (second conductive member fifth portion)

Claims (5)

A first power conversion module;
A second power conversion module disposed in parallel in a state of being separated from the first power conversion module;
A first electrode terminal and a second electrode terminal which are provided side by side at a position close to the second power conversion module of the first power conversion module and have different polarities from each other;
A third electrode terminal and a fourth electrode terminal, which are arranged side by side in the vicinity of the first power conversion module of the second power conversion module, and have different polarities from each other;
A first conductive member connecting the first electrode terminal and the third electrode terminal having the same polarity with respect to the first electrode terminal;
A second conductive member that connects the second electrode terminal and the fourth electrode terminal having the same polarity with respect to the second electrode terminal;
The first conducting member and the second conducting member each include an intersection that intersects with each other between the first power conversion module and the second power conversion module ,
At least one of the first conducting member and the second conducting member is bent so that the intersecting portions are separated from each other . A first power conversion module;
A second power conversion module disposed in parallel in a state of being separated from the first power conversion module;
A first electrode terminal and a second electrode terminal which are provided side by side at a position close to the second power conversion module of the first power conversion module and have different polarities from each other;
A third electrode terminal and a fourth electrode terminal, which are arranged side by side in the vicinity of the first power conversion module of the second power conversion module, and have different polarities from each other;
A first conductive member connecting the first electrode terminal and the third electrode terminal having the same polarity with respect to the first electrode terminal;
A second conductive member that connects the second electrode terminal and the fourth electrode terminal having the same polarity with respect to the second electrode terminal;
The first conducting member and the second conducting member each include an intersection that intersects with each other between the first power conversion module and the second power conversion module,
The second power conversion module has a fourth electrode terminal and a third electrode terminal along a direction in which the first electrode terminal and the second electrode terminal of the first power conversion module are arranged in this order with respect to the arrangement of the electrode terminals. Are arranged in the order of
The first conducting member is
A first conducting member first portion extending in a direction away from the second electrode terminal from a connection portion with the first electrode terminal;
A first conductive member second portion extending from the first conductive member first portion toward the second power conversion module;
A first conducting member third portion extending in a direction away from the fourth electrode terminal from a connection portion with the third electrode terminal;
A first conducting member fourth part extending from the first conducting member third part toward the first power conversion module;
The first conduction member that connects the first conduction member second portion opposite the first conduction member first portion and the first conduction member fourth portion opposite the first conduction member third portion to each other. A member fifth portion,
The second conducting member is
A second conducting member first portion extending in a direction away from the first electrode terminal from a connection portion with the second electrode terminal;
A second conducting member second part extending from the second conducting member first part toward the second power conversion module;
A second conductive member third portion extending in a direction away from the third electrode terminal from a connection portion with the fourth electrode terminal;
A second conducting member fourth portion extending from the second conducting member third portion toward the first power conversion module;
A second continuity connecting the second conductive member second part opposite to the second conductive member first part and the second conductive member fourth part opposite to the second conductive member third part. And a member fifth portion. The power conversion device according to claim 2 , wherein the first conduction member and the second conduction member have the same shape. The first power conversion module and the second power conversion module are disposed on a cooler;
The said 1st conduction | electrical_connection member and the said 2nd conduction | electrical_connection member are adjacent to the said cooler between the said 1st power conversion module and the said 2nd power conversion module, The Claim 1 thru | or 3 characterized by the above-mentioned. The power converter device according to any one of the above. Each of the intersections of the first conductive member and the second conductive member, claims 1, characterized in that intersect so as to flow toward a current in opposite directions to any one of the 4 The power converter described.

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