Motor control device

Abstract

To provide a motor control device that can secure high sealability.SOLUTION: A motor control device 1 includes a case 10 to accommodate a switching element and a printed board. The case 10 includes a fixed base 50 where a printed board is fixed on a first surface 11f, and a main cover 12 attached to a base member 11 so as to cover a part where the printed board is provided. The base member 11 includes a second surface 151 formed apart from the first surface 11f in a plate thickness direction Z, and an inclination surface 152 provided so as to connect the first surface 11f and the second surface 151. In the base member 11, a sealing agent 90 that can be applied is provided continuously along the first surface 11f, the inclination surface 152, and the second surface 151. The main cover 12 is attached to the base member 11 with the sealing agent 90 held between the main cover and the inclination surface 152.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a motor control device. [Background technology]

[0002] Electronic components mounted on vehicles and the like are housed in waterproof cases to prevent the infiltration of rainwater. For example, Patent Document 1 discloses a configuration in which a substrate on which electronic components are mounted is housed in a housing having an upper case and a lower case. In this configuration, a sealant is interposed between the upper case and the lower case to prevent rainwater from entering the housing. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2009-230925 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, when a sealant having fluidity such as a liquid gasket or adhesive is used as the sealant, the sealant is affected by gravity when it is applied. Therefore, if there is a step or the like on the mating surface between the upper case and the lower case, the sealant may drip when it is applied to the part that extends downward at the step. This may result in insufficient sealing. Furthermore, when a separate member such as a connector housing is sandwiched between the upper and lower cases as in the configuration disclosed in Patent Document 1, a sealant must be applied between the upper case and the connector, and between the connector and the upper case, respectively. This means that the sealant may not be applied sufficiently, and there is a possibility that sufficient sealing performance may not be ensured. An object of the present invention is to provide a motor control device that can ensure high sealing performance. [Means for solving the problem]

[0005] In order to solve the above problems, in a first aspect of the present invention, a motor control device comprises a substrate on which switching elements for driving a motor are mounted, and a case for accommodating the switching elements and the substrate, the case comprising a fixed base having the substrate fixed to a first surface thereof, and a cover attached to the fixed base so as to cover at least a portion of the first surface of the fixed base on which the substrate is provided, the fixed base having a second surface formed at a distance from the first surface in a thickness direction of the substrate, and an inclined surface provided to connect the first surface and the second surface and extending at an angle with respect to the thickness direction, a coatable sealant is provided continuously along the first surface, the inclined surface and the second surface, and the cover is attached to the fixed base with the sealant interposed between the cover and the inclined surface.

[0006] According to this configuration, the case that houses the switching element and the substrate includes a fixed base and a cover, and the fixed base has a first surface, a second surface that is formed to be spaced apart from the first surface in the plate thickness direction, and an inclined surface that is provided to connect the first surface and the second surface. In this way, when the first surface and the second surface are spaced apart in the plate thickness direction and a step is generated on the mating surface between the fixed base and the cover, by connecting the first surface and the second surface with an inclined surface, it is possible to prevent the sealant from dripping due to gravity when applying the sealant to the inclined surface. As a result, by attaching the cover to the fixed base with the sealant interposed between the cover and the inclined surface, it is possible to ensure that the sealant is interposed on the inclined surface, and the case has high sealing properties. As a result, it is possible to provide a motor control device that can ensure high sealing properties.

[0007] A second aspect of the present invention is a motor control device according to the first aspect, wherein the fixed base has a base groove or a base protrusion extending continuously along at least the first surface, and the cover has a cover protrusion which fits into the base groove, or a cover groove into which the base protrusion fits.

[0008] With this configuration, the base groove and the cover ridge, or the base ridge and the cover groove, fit together at least in the portion along the first surface of the fixed base, further improving the sealing performance provided by the sealant.

[0009] A third aspect of the present invention is a motor control device according to the first or second aspect, further comprising a connector member that is arranged to penetrate between the inside and outside of the cover through an opening formed between the fixed base and the cover, and to which an external connector is detachably connected, and a resin molded portion is formed between the fixed base and the cover to seal the gap between the inner surface of the opening and the outer surface of the connector member.

[0010] According to this configuration, in the opening formed between the fixed base and the cover, a resin molded portion is formed between the fixed base and the cover at a portion where the connector member passes through, so that the resin molded portion can ensure high sealing performance even in the portion where the connector member passes through.

[0011] A fourth aspect of the present invention is a motor control device in any one of the first to third aspects, further comprising a terminal connection member having an element connection portion connected to the switching element at one end and a terminal portion to which external wiring is detachably connected at the other end, wherein the fixed base further comprises a raised portion that protrudes from the first surface in the plate thickness direction to form the inclined surface and the second surface and supports the terminal portion, and the cover covers at least a portion of the first surface of the fixed base where the substrate is provided and protrudes the terminal portion in a first direction intersecting the plate thickness direction, and comprises a main cover attached to the fixed base with the sealant interposed between the first surface, the inclined surface, the second surface, and the terminal portion, and a sub-cover detachably provided on the fixed base so as to cover the inclined surface, the second surface, and the terminal portion.

[0012] According to this configuration, the sub-cover is provided to cover the inclined surface, the second surface, and the terminal portion at the portion where the terminal portion protrudes from the main cover attached to the fixed base so as to cover at least the portion where the substrate is provided. This causes the portion where the main cover is attached to the fixed base with a sealant interposed between the inclined surface, the second surface, and the terminal portion to be covered by the sub-cover. This makes it possible to prevent rainwater and the like from reaching the portions where the main cover is joined to the inclined surface, the second surface, and the terminal portion.

[0013] A fifth aspect of the present invention relates to the motor control device according to the fourth aspect, wherein the sealing agent is formed in a planar shape along the inclined surface and the second surface.

[0014] With this configuration, in the portion covered by the sub-cover, the sealant is formed in a planar shape along the inclined surface and the second surface, thereby ensuring high sealing performance while maintaining a simple shape for the inclined surface and the second surface. Effect of the Invention

[0015] According to one aspect of the present invention, it is possible to provide a motor control device that can ensure high sealing performance. [Brief description of the drawings]

[0016] [Figure 1] 1 is a perspective view showing a motor control device according to an embodiment of the present invention; [Diagram 2] 2 is a perspective view of the motor control device in FIG. 1, as seen from a different direction than in FIG. 1. [Diagram 3] 2 is a perspective view showing a state in which a main cover and a sub cover are removed from the motor control device of FIG. 1. [Figure 4] FIG. 2 is a cross-sectional view of the motor control device of FIG. [Diagram 5] 2 is a perspective view showing a base member and a spacer of the motor control device of FIG. 1. [Figure 6] 5 is a cross-sectional view taken along the line II in FIG. 4 with a sub-cover removed from the motor control device. [Figure 7] 11 is a cross-sectional view of the fixed base, the spacer, the main cover, and the sub-cover viewed from a second direction. FIG. [Figure 8] FIG. 2 is a plan view of the motor control device of FIG. [Figure 9] 2 is a perspective view showing a state in which a sub-cover is removed from the motor control device of FIG. 1. [Figure 10] 4 is an enlarged cross-sectional view showing a joint between a main cover and a fixed base of the motor control device. FIG. [Figure 11] FIG. 4 is an enlarged perspective view showing a connector member provided in the motor control device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a motor control device according to the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to this embodiment.

[0018] <Motor control device 1> Fig. 1 is a perspective view showing a motor control device 1 in an embodiment. Fig. 2 is a perspective view of the motor control device 1 in Fig. 1, seen from a different direction than in Fig. 1. Fig. 3 is a perspective view showing a state in which a main cover 12 and a sub-cover 13 have been removed from the motor control device 1 in Fig. 1. Fig. 4 is a cross-sectional view of the motor control device in Fig. 1. The motor control device 1 shown in Figures 1 to 4 has an inverter function that converts DC power supplied from a battery (not shown), for example, into AC power and drives an AC motor (not shown) with the converted AC power. The motor control device 1 in this embodiment is mounted on a vehicle such as a motorcycle, a motorized bicycle, or an automobile. The motor control device 1 has a case 10. As shown in Figures 3 and 4, the motor control device 1 has a printed circuit board (substrate) 20, a plurality of electrolytic capacitors 60, and a plurality of terminal connection members 80 within the case 10.

[0019] As shown in Figures 1, 2 and 4, the case 10 mainly includes a base member 11, a main cover (cover) 12, a sub-cover (cover) 13, and a spacer 15. As shown in Figures 3 and 4, the base member 11 is formed in a box shape with one side open. The printed circuit board 20, a plurality of electrolytic capacitors 60, and a plurality of terminal connection members 80 are mounted on the base member 11.

[0020] <Printed circuit board 20> The printed circuit board 20 is plate-shaped, and has a surface (main surface) 20a on which a plurality of switching elements 22 are mounted. The printed circuit board 20 is formed in a rectangular shape when viewed from a thickness direction Z of the printed circuit board 20 that is perpendicular to the surface 20a. The printed circuit board 20 is fixed to a first surface 11f of the base member 11. In the following description, a direction perpendicular to the plate thickness direction Z and along the surface 20a of the printed circuit board 20 is defined as a first direction X, and a direction perpendicular to the plate thickness direction Z and the first direction X is defined as a second direction Y.

[0021] The printed circuit board 20 is a PWB (Printed Wiring Board). The ON / OFF operation of the multiple switching elements 22 is controlled by a switching control circuit (not shown), thereby operating the motor control device 1 under optimal conditions according to the driving state of the AC motor.

[0022] A plurality of first pattern terminals (not shown) and a plurality of second pattern terminals (not shown) are provided on the front surface 20a of the printed circuit board 20 on one side X1 in the first direction X with respect to the plurality of switching elements 22. The first pattern terminal is electrically connected to the positive electrode of the switching element 22, for example, via a wiring pattern (not shown) formed on the printed circuit board 20. The second pattern terminal is electrically connected to the negative electrode of the switching element 22, for example, via a wiring pattern (not shown) formed on the printed circuit board 20.

[0023] The printed circuit board 20 is provided with a bus bar 30 on one side X1 in the first direction X with respect to the multiple switching elements 22. The bus bar 30 is connected to the multiple first pattern terminals and the multiple second pattern terminals of the printed circuit board 20. The bus bar 30 is mounted on the front surface 20a of the printed circuit board 20 by being connected to the multiple first pattern terminals and the multiple second pattern terminals. The bus bar 30 electrically connects the multiple electrolytic capacitors 60 and the multiple switching elements 22.

[0024] The bus bar 30 includes a first bus bar 31 and a second bus bar 32. Each of the first bus bar 31 and the second bus bar 32 is in the shape of a plate extending in the second direction Y and is made of a conductive material. The first bus bar 31 is electrically connected to the positive electrode of the switching element 22 via a first pattern terminal and a wiring pattern (not shown). The second bus bar 32 is electrically connected to the negative electrode of the switching element 22 via a second pattern terminal and a wiring pattern (not shown).

[0025] <Electrolytic capacitor 60> The electrolytic capacitors 60 are disposed on one side X1 in the first direction X with respect to the printed circuit board 20. The electrolytic capacitors 60 are accommodated in an accommodating recess 11z formed in the base member 11. Each electrolytic capacitor 60 is formed, for example, in a cylindrical shape. Each electrolytic capacitor 60 is arranged with its axial direction aligned with the first direction X. The electrolytic capacitors 60 are arranged in parallel in the second direction Y. In this embodiment, for example, eight electrolytic capacitors 60 are arranged in parallel in the second direction Y.

[0026] 3, each electrolytic capacitor 60 has a first lead terminal 61 and a second lead terminal 62. The first lead terminal 61 and the second lead terminal 62 are provided at an interval in the second direction Y. The first lead terminal 61 is connected to the first bus bar 31. The second lead terminal 62 is connected to the second bus bar 32. In this manner, the electrolytic capacitor 60 is electrically connected to the switching element 22 via the bus bar 30. The electrolytic capacitor 60 suppresses fluctuations in DC voltage caused by the switching operation of the switching element 22. In the embodiment, the electrolytic capacitor 60 is described as an example of the capacitor, but the capacitor is not limited to the electrolytic capacitor 60. As another example, for example, a capacitor having a sufficiently large capacitance capable of suppressing the fluctuation of the DC voltage within a target value may be used.

[0027] <Terminal connection member 80> 3 and 4, the terminal connection member 80 is provided on the other side X2 in the first direction X with respect to the multiple switching elements 22. The multiple terminal connection members 80 are provided in parallel in the second direction Y. In the present embodiment, five terminal connection members 80 are provided lined up in the second direction Y.

[0028] Each terminal connection member 80 extends in the first direction X. Each terminal connection member 80 has an element connection portion 81 on one side X1 in the first direction X. As shown in FIG. 3, among the five terminal connection members 80, the element connection portions 81 of three terminal connection members 80A arranged in the center in the second direction Y are fixed to the printed circuit board 20 by screws 88 and connected to the multiple switching elements 22 via a wiring pattern (not shown) formed on the front surface 20a of the printed circuit board 20. Among the five terminal connection members 80, the element connection portions 81 of two terminal connection members 80B provided at both ends in the second direction Y are fixed to the printed circuit board 20 by screws 88 and connected to a wiring pattern (not shown) formed on the front surface 20a of the printed circuit board 20.

[0029] Fig. 5 is a perspective view showing the base member 11 and the spacer 15 of the motor control device 1 of Fig. 1. Fig. 6 is a cross-sectional view taken along the line II in Fig. 4 with the sub-cover 13 removed. As shown in Figs. 3 and 4, each terminal connection member 80 has a terminal portion 82 on the other side X2 in the first direction X. The terminal portion 82 of each terminal connection member 80 is fixed to a spacer 15 attached to a first surface 11f of the base member 11. As shown in Figs. 5 and 6, the spacer 15 extends in the second direction Y when viewed from the plate thickness direction Z. The spacer 15 has a predetermined thickness in the plate thickness direction Z. The spacer 15 is overlapped with an end portion of the surface 11f of the base member 11 on the other side X2 in the first direction X, and constitutes a fixed base 50 together with the base member 11.

[0030] The spacer 15 constituting the raised portion 17 has a second surface 151 and a pair of inclined surfaces 152. The second surface 151 is formed on a portion of the spacer 15 excluding both end portions in the second direction Y. The second surface 151 terminates on the inside in the second direction Y with respect to the first surface 11f of the base member 11. The second surface 151 is a surface of the spacer 15 facing a first side Z1 in the plate thickness direction Z. The second surface 151 is spaced from the first surface 11f of the base member 11 to the first side Z1 in the plate thickness direction Z.

[0031] A pair of inclined surfaces 152 are provided on both sides of the second surface 151 in the second direction Y. Each inclined surface 152 is inclined with respect to the plate thickness direction Z. When viewed from the first direction X, each inclined surface 152 is inclined from the second surface 151 toward the outside in the second direction Y toward the second side Z2 in the plate thickness direction Z. Both end edges of each inclined surface 152 in the second direction Y coincide with both end edges of the first surface 11f in the second direction Y, or are disposed inside in the second direction Y. Therefore, each inclined surface 152 is provided so as to connect the first surface 11f exposed on both second outer sides of the spacer 15 and the second surface 151 in the fixed base 50. In addition, the spacer 15 is raised in the plate thickness direction Z from the first surface 11f by the second surface 151 and the inclined surface 152, and forms a raised portion 17 on the fixed base 50 that supports the terminal portion 82.

[0032] The spacer 15 is formed with an accommodation groove 15m extending in the first direction X and accommodating the terminal portion 82. The accommodation grooves 15m are formed at intervals in the second direction Y, the same number as the terminal connection members 80, that is, five. Each accommodation groove 15m is recessed from the second surface 151 of the spacer 15 toward the second side Z2 in the plate thickness direction Z. As shown in Figs. 3 and 6, the second surface 151 of the spacer 15 and the surface 82f of the terminal portion 82 accommodated in the accommodation groove 15m are along the same plane intersecting the plate thickness direction Z. Also, as shown in Figs. 3 to 5, the accommodation groove 15m is formed with a protrusion 15t protruding toward the first side Z1 in the plate thickness direction Z at the end of the other side X2 in the first direction X. This protrusion 15t restricts the movement of the terminal portion 82 of the terminal connection member 80 toward the other side X2 in the first direction X.

[0033] 3 and 5, the spacer 15 has, at both ends in the second direction Y, locked portions 15s that protrude toward the second side Z2 in the plate thickness direction Z. The spacer 15 is so-called snap-fitted by locking the locked portions 15s to locking claws 11t formed on the base member 11.

[0034] 4, external wiring (not shown) is detachably connected to the terminal portion 82 by a bolt 83 and a nut (not shown). A bolt accommodating hole 15h that accommodates a head 83a of the bolt 83 is formed in the spacer 15. A shaft portion 83b of the bolt 83 penetrates the terminal portion 82 and protrudes toward a first side Z1 in the plate thickness direction Z relative to the terminal portion 82.

[0035] Here, among the five terminal connection members 80, the terminal portions 82 of the three terminal connection members 80A arranged in the center in the second direction Y are connected to external wiring for supplying U-phase, V-phase, and W-phase drive currents to a motor (not shown). Among the five terminal connection members 80, the terminal portions 82 of the two terminal connection members 80B arranged at both ends in the second direction Y are connected to external wiring for connection to a power source and ground.

[0036] <Base member 11> 1, 2, and 4, the base member 11 is provided with a plurality of heat dissipation fins 14 in a portion in which the printed circuit board 20 and the plurality of electrolytic capacitors 60 are housed. The plurality of fins 14 are provided at intervals in the second direction Y. Each fin 14 protrudes from the base member 11 to the second side Z2 in the plate thickness direction Z and extends in the first direction X. The plurality of fins 14 dissipate heat generated by the plurality of electrolytic capacitors 60, the bus bar 30 mounted on the printed circuit board 20, the plurality of switching elements 22, the plurality of terminal connection members 80, etc., to the outside of the base member 11.

[0037] 1 and 5, a base groove 18 is provided on the first surface 11f of the base member 11 so as to surround an area in which the printed circuit board 20 and the plurality of electrolytic capacitors 60 are provided. The base groove 18 has a first groove portion 18a, a second groove portion 18b, a third groove portion 18c, and a fourth groove portion 18d.

[0038] The first groove portion 18a, the second groove portion 18b, and the third groove portion 18c are provided along three side surfaces 11a, 11b, and 11c along the outer periphery of the first surface 11f of the base member 11 when viewed in the plate thickness direction Z.

[0039] FIG. 7 is a cross-sectional view of the fixed base 50, the spacer 15, the main cover 12, and the sub-cover 13 as viewed from the second direction Y. As shown in FIG. 7, the fourth groove 18d is provided at a position shifted toward one side X1 in the first direction X with respect to the remaining side surface 11d along the outer periphery of the base member 11. A spacer protrusion 155 protruding toward a second side Z2 in the plate thickness direction Z is integrally provided on the spacer 15. The spacer protrusion 155 extends in the second direction Y and is fitted into the fourth groove 18d. A sealant 90 such as a liquid gasket is interposed between the spacer protrusion 155 and the fourth groove 18d to ensure sealing between the spacer 15 and the first surface 11f of the base member 11.

[0040] FIG. 8 is a plan view of the motor control device 1 of FIG. 1, 2, and 8, the base member 11 is provided with stays 16 protruding on both sides in the second direction Y. The base member 11 (the motor control device 1) is fixed to a vehicle body equipped with a motor (not shown) by bolts (not shown) inserted through the stays 16.

[0041] <Main cover 12> FIG. 9 is a perspective view showing a state in which the sub-cover 13 is removed from the motor control device 1 of FIG. 4 and 9, the main cover 12 is provided to cover the multiple electrolytic capacitors 60 housed in the base member 11 and the printed circuit board 20. As shown in Figures 1, 2 and 8, the main cover 12 integrally has a plate-like portion 121 and a peripheral wall portion 122, and is formed in a box shape that opens to a second side Z2 in the plate thickness direction Z.

[0042] The plate-shaped portion 121 extends along a plane intersecting with the plate thickness direction Z. The plate-shaped portion 121 is formed in a rectangular shape when viewed from the plate thickness direction Z. The dimension of the plate-shaped portion 121 in the Y direction is equal to that of the base member 11. The dimension of the plate-shaped portion 121 in the X direction is smaller than that of the base member 11. Therefore, when viewed from the plate thickness direction Z, the base member 11 protrudes toward the other side X2 in the first direction X relative to the plate-shaped portion 121.

[0043] The peripheral wall portion 122 rises from the four sides of the plate-shaped portion 121 toward the second side Z2 in the plate thickness direction Z. Here, as shown in FIG. 8, in the peripheral wall portion 122, the wall portion 122a provided on one side X1 in the first direction X and the wall portions 122b, 122c provided on both sides in the second direction Y are provided at positions overlapping with the three side surfaces 11a, 11b, 11c along the outer periphery of the base member 11, respectively, as viewed from the plate thickness direction Z. As shown in FIGS. 4, 7, and 9, in the peripheral wall portion 122, the wall portion 122d provided on the other side X2 in the first direction X is provided at a position shifted toward the one side X1 in the first direction X with respect to the remaining one side surface 11d along the outer periphery of the base member 11. As a result, the terminal portions 82 of the multiple terminal connection members 80 protrude from the wall portion 122d toward the other side X2 in the first direction X.

[0044] FIG. 10 is an enlarged cross-sectional view showing the joint between the main cover 12 and the fixed base 50 of the motor control device 1. As shown in FIG. As shown in FIGS. 1, 2, and 8 to 10, the peripheral wall portion 122 has a flange portion 123 formed at a tip portion of the second side Z2 in the plate thickness direction Z, the flange portion 123 extending outward from the peripheral wall portion 122. As shown in FIG. 10, the flanges 123a, 123b, and 123c of the walls 122a, 122b, and 122c are in close contact with the outer peripheral edge of the first surface 11f of the base member 11 via a sealant 90 such as a liquid gasket. The flanges 123a, 123b, and 123c of the walls 122a, 122b, and 122c are each integrally provided with a cover inner protrusion 123t and a cover outer protrusion 123p that protrude to the second side Z2 in the plate thickness direction Z. The cover inner protrusion 123t is formed on the inner peripheral portion of the flange 123. The cover outer protrusion 123p is formed on the outer peripheral portion of the flange 123 so as to surround the cover inner protrusion 123t. In the illustrated example, the cover outer protrusion 123p protrudes to the second side Z2 in the plate thickness direction Z further than the cover inner protrusion 123t. The cover ridges 123t and 123p extend along the walls 122a, 122b and 122c, respectively.

[0045] The cover inner protrusion 123t is fitted into the first groove portion 18a, the second groove portion 18b, and the third groove portion 18c of the base groove 18. A sealant 90 such as a liquid gasket is interposed between the cover protrusion 123t and the first groove portion 18a, the second groove portion 18b, and the third groove portion 18c to ensure sealing between the main cover 12 and the first surface 11f of the base member 11. In this case, the space of the case 10 surrounded by the base member 11 and the main cover 12 constitutes the first space 100A. The cover outer protrusion 123p surrounds the periphery of the side surfaces 11a, 11b, and 11c of the base member 11. Therefore, the portion that passes between the cover outer protrusion 123p and the side surfaces 11a, 11b, and 11c and reaches the first space 100A is formed in a meandering labyrinth shape in cross section.

[0046] 7 and 9, the flange portion 123d connected to the wall portion 122d overlaps an end portion of the spacer 15 on one side X1 in the first direction X when viewed from the plate thickness direction Z. As shown in Fig. 6, the flange portion 123d has a straight flange portion 123d1 extending in the second direction Y along the second surface 151 and a pair of inclined surfaces 152 of the spacer 15, and a pair of inclined flange portions 123d2.

[0047] 6 and 7, a sealant 90 such as a liquid gasket is interposed between the flange portion 123d and the pair of inclined surfaces 152, the second surface 151, and the surface 82f of the terminal portion 82 of the spacer 15, thereby ensuring sealing between the main cover 12, the spacer 15, and the terminal portion 82. When assembling the motor control device 1, the sealant 90 is continuously applied using a dispenser or the like to the first groove portion 18a, the second groove portion 18b, the third groove portion 18c, and also to the portions of the pair of inclined surfaces 152, the second surface 151, and the surface 82f of the terminal portion 82 of the spacer 15 that overlap with the flange portion 123d.

[0048] 7, a tip surface 123s (surface facing the second side Z2 in the plate thickness direction Z) of the flange portion 123d has no grooves or protrusions and is flat facing the second side Z2 in the plate thickness direction Z. As a result, the sealant 90 interposed between the flange portion 123d and the second surface 151 of the spacer 15 and the surface 82f of the terminal portion 82 is formed in a planar shape along the tip surface 123s of the flange portion 123d, the pair of inclined surfaces 152, the second surface 151, and the surface 82f of the terminal portion 82. In this manner, the multiple electrolytic capacitors 60 and the printed circuit board 20 are housed in a first space 100A that is sealed by the base member 11, the spacer 15, and the main cover 12.

[0049] 1 and 2, the main cover 12 has, at both ends in the second direction Y, locked portions 12s that protrude toward the second side Z2 in the plate thickness direction Z. The main cover 12 is so-called snap-fitted by locking claws 11k formed on the side surfaces 11b and 11c of the base member 11 with the locked portions 12s.

[0050] <Sub-cover 13> As shown in FIG. 2 and FIG. 4, the sub-cover 13 is provided on the other side X2 in the first direction X with respect to the main cover 12. The sub-cover 13 is formed in a box shape that opens to the second side Z2 in the plate thickness direction Z and one side X1 in the first direction. The sub-cover 13 is provided so as to cover the terminal portions 82 of the terminal connection members 80 that protrude from the wall portion 122d of the main cover 12 to the other side X2 in the first direction X. The sub-cover 13 integrally includes a base portion 131 and a side wall portion 132. The base portion 131 extends along a plane that intersects with the plate thickness direction Z. The base portion 131 is formed in a rectangular shape when viewed from the plate thickness direction Z. The base portion 131 is provided on the same plane as the plate-shaped portion 121 of the main cover 12.

[0051] The side wall portion 132 rises from the outer circumferential edge of the base portion 131 toward a second side Z2 in the plate thickness direction Z. The side wall portion 132 has a wall portion 132a provided on the other side X2 in the first direction X, and walls 132b, 132c provided on both sides in the second direction Y. Such a sub-cover 13 is open toward the second side Z2 in the plate thickness direction Z and one side X1 in the first direction X by the base portion 131 and the side wall portion 132.

[0052] The sub-cover 13 also has a plurality of protruding portions 134 that protrude toward the other side X2 in the first direction X on the second side Z2 in the plate thickness direction Z relative to the wall portion 132a. The protruding portions 134 are arranged at intervals in the second direction Y. As shown in FIG. 4, the protruding portions 134 have wiring insertion holes 134h formed on a surface facing the second side Z2 in the plate thickness direction Z, through which external wiring is inserted. Ends of the external wiring are drawn into the sub-cover 13 through the wiring insertion holes 134h, and then connected to the terminal portions 82 individually within the sub-cover 13.

[0053] As shown in Fig. 8, the sub-cover 13 is detachably fixed to the side surface 11d of the base member 11 by a screw 135. In this state, as shown in Figs. 7 and 8, an edge 131s on one side X1 in the first direction X of the base portion 131 of the sub-cover 13 contacts the wall portion 122d of the main cover 12. Specifically, the edge 131s abuts against the wall portion 122d from the other side X2 in the first direction X. However, the edge 131s may overlap the wall portion 122d or the plate-shaped portion 121 from the first side Z1 in the plate thickness direction Z as long as the main cover 12 and the sub-cover 13 are configured to be in close contact with each other.

[0054] In the case 10, a space surrounded by the base member 11 and the sub-cover 13 constitutes the second space 100B. The first space 100A and the second space 100B are partitioned by a wall portion 122d.

[0055] <Filter 128> 4 and 9, a filter 128 is provided on the main cover 12. A communication hole 125 is formed in the end portion of the plate-shaped portion 121 on the other side X2 in the first direction X. The communication hole 125 is formed in the center portion of the plate-shaped portion 121 in the second direction Y. The communication hole 125 is formed in a bottom wall 126b of a recess 126 formed in the plate-shaped portion 121.

[0056] The recess 126 is recessed from an outer surface 121f facing a first side Z1 in the plate thickness direction Z of the plate-shaped portion 121 toward a second side Z2 in the plate thickness direction Z. The recess 126 is formed, for example, in a U-shape when viewed from the plate thickness direction Z.

[0057] The communication hole 125 penetrates the bottom wall 126b of the recess 126 in the plate thickness direction Z. As a result, the communication hole 125 communicates between the inside and the outside of the case 10 (the first space 100A).

[0058] The filter 128 is provided in the recess 126 so as to cover the communication hole 125. The filter 128 is formed of a material that allows air to pass through but prevents the passage of rainwater and foreign matter. In this embodiment, the communication hole 125 and the filter 128 are formed, for example, in a circular shape when viewed from the plate thickness direction Z. The filter 128 may be bonded or welded to a portion of the bottom wall 126b that is positioned around the communication hole 125, or may simply be placed on the bottom wall 126b.

[0059] As shown in Figs. 1, 2, 4, and 8, the sub-cover 13 is provided with a filter cover portion 138. The filter cover portion 138 is integrally formed at an end portion of the base portion 131 on one side X1 in the first direction X. The filter cover portion 138 is provided at a central portion in the second direction Y. The filter cover portion 138 is provided so as to protrude from the base portion 131 to one side X1 in the first direction X. The filter cover portion 138 is provided on the same plane as the base portion 131. The filter cover portion 138 is formed, for example, in a substantially U-shape when viewed from the plate thickness direction Z. In the illustrated example, the plate thickness of the filter cover portion 138 gradually becomes thinner toward the one side X1 in the first direction X.

[0060] 4, the filter cover part 138 is provided in the recess 126 so as to face the bottom wall 126b in the plate thickness direction Z with the filter 128 in between. The filter cover part 138 is spaced apart from the filter 128 on one side X1 in the plate thickness direction Z. A small gap S is provided between the filter cover part 138 and the recess 126 when viewed from the plate thickness direction Z.

[0061] By providing such a filter cover portion 138, the first space 100A covered by the main cover 12 communicates with the outside through the communication hole 125, the filter 128, the space between the filter 128 and the filter cover portion 138, and the gap S.

[0062] <Connector member 70> FIG. 11 is an enlarged perspective view showing a connector member 70 provided in the motor control device 1. As shown in FIG. 1, 4, and 11, a connector member 70 is provided at an end portion on one side X1 in the first direction X of the case 10. The connector member 70 is detachably connected to an external connector (not shown) for controlling electronic components such as the switching element 22 and the electrolytic capacitor 60 housed in the case 10.

[0063] As shown in FIG. 3, FIG. 4, FIG. 5, and FIG. 11, the side surface 11a on one side X1 in the first direction X of the base member 11 is provided with a wall portion 11w rising to the first side Z1 in the plate thickness direction Z in the center in the second direction Y. Also, as shown in FIG. 11, a facing wall 122w is provided in a part of the wall portion 122a on one side X1 in the first direction X of the main cover 12 at a position overlapping with the wall portion 11w when viewed from the plate thickness direction Z. The tip end of the facing wall 122w on the second side Z2 in the plate thickness direction Z abuts against the tip end of the wall portion 11w on the first side Z1 in the plate thickness direction Z. Also, as shown in FIG. 4, notches 11x and 122k are formed in the center of the wall portion 11w and the facing wall 122w in the second direction Y. An opening 77 is formed between the notch 122k and the wall portion 11w. This opening 77 is formed between the base member 11 and the main cover 12.

[0064] The connector member 70 is provided on one side X1 of the case 10 in the first direction X so as to penetrate between the inside and the outside of the case 10 through an opening 77.

[0065] The connector member 70 has a connector housing 71 that accommodates a plurality of connector terminals 75 (see FIGS. 1 and 11). The connector housing 71 integrally includes a housing main body portion 71a that is inserted into the opening portion 77, and a sleeve portion 71b that extends from the housing main body portion 71a to one side X1 in the first direction X.

[0066] 1 and 11, the wall portion 122a of the main cover 12 is provided with a protruding wall portion 78 that protrudes from the wall portion 122a to one side X1 in the first direction X so as to surround the connector member 70 inserted into the opening 77 (see FIG. 4). The protruding wall portion 78 integrally includes a pair of first wall portions 78a extending in the plate thickness direction Z, and second wall portions 78b that connect the pair of first wall portions 78a at their ends in the plate thickness direction Z on both sides in the second direction Y of the connector member 70 inserted into the opening 77.

[0067] 1 and 4, a resin molded portion 79 is formed on the inside of the protruding wall portion 78. The resin molded portion 79 is formed by filling a portion surrounded by the outer peripheral edge portion of the first surface 11f of the base member 11, the protruding wall portion 78, the wall portion 11w, and the opposing wall 122w with resin. Inside the protruding wall portion 78, the resin molded portion 79 fills the gap between the inner peripheral surface of the opening 77 and the outer peripheral surface of the connector member 70, and the gap between the wall portion 11w and the wall portion 122a.

[0068] Thus, in this embodiment, the case 10 housing the switching element 22 and the printed circuit board 20 includes a base member 11 and a main cover 12, and the base member 11 has a first surface 11f, a second surface 151 formed and spaced apart from the first surface 11f in the plate thickness direction Z, and an inclined surface 152 provided to connect the first surface 11f and the second surface 151. According to this configuration, when the first surface 11f and the second surface 151 are separated in the plate thickness direction Z and a step occurs at the mating surface between the base member 11 and the main cover 12, by connecting the first surface 11f and the second surface 151 with the inclined surface 152, it is possible to prevent the sealant 90 from dripping due to gravity when applying the sealant 90 to the inclined surface 152. As a result, by attaching the main cover 12 to the base member 11 with the sealant 90 interposed between the inclined surface 152, it is possible to ensure that the sealant 90 is interposed between the inclined surface 152 and the base member 11, and the case 10 has high sealing properties. As a result, it is possible to provide a motor control device 1 that can ensure high sealing properties. In addition, since the motor control device 1 can be provided in a configuration that ensures high sealing performance, it will be possible to contribute to Goal 7 of the Sustainable Development Goals (SDGs) led by the United Nations, which states, "Ensure access to affordable, reliable, sustainable and modern energy for all," and Goal 9, "Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation."

[0069] In this embodiment, in a portion along the first surface 11f of the base member 11, the base groove 18 and the cover inner protrusion 123t are configured to fit together. According to this configuration, the sealing performance provided by the sealant 90 is further improved.

[0070] In this embodiment, a resin molded portion 79 is formed between the base member 11 and the main cover 12 at the portion where the connector member 70 penetrates in the opening 77 formed between the base member 11 and the main cover 12. According to this configuration, high sealing performance can be ensured by the resin molded portion 79 even in the portion through which the connector member 70 passes.

[0071] In this embodiment, the sub-cover 13 is configured to cover the inclined surface 152, the second surface 151, and the terminal portion 82 at the portion where the terminal portion 82 protrudes from the main cover 12 attached to the base member 11 so as to cover at least the portion where the printed circuit board 20 is provided. According to this configuration, the sub-cover 13 can prevent the main cover 12 from extending to the portion attached to the base member 11 with the sealing agent 90 interposed between the inclined surface 152, the second surface 151, and the terminal portion 82. Furthermore, by being covered by the sub-cover 13, the portion where the main cover 12 is attached to the base member 11 with the sealant 90 interposed between the inclined surface 152, the second surface 151, and the terminal portion 82 is not exposed to the outside. This reduces the need for a complex configuration in which the base groove 18 and the cover inner protrusion 123t are fitted together, as in the portion along the first surface 11f of the base member 11, for the portion where the sealant 90 is interposed between the main cover 12, the inclined surface 152, the second surface 151, and the terminal portion 82.

[0072] In the present embodiment, in the portion covered by the sub-cover 13, the sealant 90 is formed in a planar shape along the inclined surface 152 and the second surface 151. According to this configuration, high sealing performance can be ensured while the inclined surface 152 and the second surface 151 have simple shapes. Furthermore, the sealant 90 only needs to be applied to the areas where the flange portion 123 of the main cover 12, the base member 11, and the spacer 15 face each other in the plate thickness direction Z, which makes it possible to reduce the weight and cost of the motor control device 1 compared to a waterproof structure in which the inside of the case 10 is filled with resin.

[0073] The present invention is not limited to the above-described embodiment, and includes various modifications to the above-described embodiment without departing from the spirit of the present invention. For example, in the above-described embodiment, the case 10 is provided with a plurality of electrolytic capacitors 60, a printed circuit board 20 having a plurality of switching elements 22 mounted thereon, and a terminal connecting member 80, but the number, positions, etc. of these components can be changed as appropriate.

[0074] In the above-described embodiment, the second surface 151 and the inclined surface 152 are provided in a portion covered by the sub-cover 13, but the present invention is not limited to this configuration. The second surface 151 and the inclined surface 152 may be formed in a portion not covered by the sub-cover 13. In addition, the second surface 151 and the inclined surface 152 may be provided in a joint between the sub-cover 13 and the base member 11, for example.

[0075] In the above embodiment, the base groove 18 is provided in the base member 11, and the cover ribs 123t are provided in the main cover 12. However, the present invention is not limited to this configuration. The base member 11 may be provided with a base rib, and the main cover 12 may be provided with a cover groove.

[0076] In the above embodiment, the connector member 70 is provided through the opening 77 formed between the main cover 12 and the base member 11, but the present invention is not limited to this configuration. The connector member 70 may be provided through an opening formed between the sub-cover 13 and the base member 11.

[0077] In the above embodiment, the cover is described as including the main cover 12 and the sub cover 13, but the cover is not limited to this configuration. The cover may be provided with only one of the main cover 12 and the sub cover 13. In the above embodiment, the fixed base 50 includes the base member 11 having the first surface 11f and the spacer 15 having the second surface 151, but is not limited to this configuration. The fixed base 50 may have the first surface and the second surface integrally. In the above-described embodiment, the inclined surface 152 connects the second surface 151 extending in the second direction Y and the first surface 11f extending in the first direction X, but the present invention is not limited to this configuration. The inclined surface 152 may connect the first surface and the second surface extending in the same direction.

[0078] In addition, within the scope of the invention, the components in the embodiments may be replaced with well-known components, and the modified examples may be combined as appropriate. [Explanation of symbols]

[0079] 1...motor control device 10...case 11...base member 11a-11d...side surface 11f...first surface 11k, 11t...engaging claw 11w...wall portion 11x...notch 11z...accommodating recess 12...main cover 12s...engaged portion 13...sub-cover 14...fin 15...spacer 15h...bolt accommodating hole 15m...accommodating groove 15s...engaged portion 15t...projection 16...stay 17...raised portion 18...base groove 18a...first groove portion 18b...second groove portion 18c...third groove portion 18d...fourth groove portion 20...printed circuit board 20a...surface 22...switching element 30...bus bar 31...first bus bar 32...second bus bar 50...fixed base 60...electrolytic capacitor 61...first lead terminal 62...second lead terminal 70...connector member 71...connector housing 71a...housing main body 71b...sleeve 75...connector terminal 77...opening 78...protruding wall 78a...first wall 78b...second wall 79...resin molded portion 80, 80A, 80B...terminal connecting member 81...element connecting portion 82...terminal portion 82f...surface 83...bolt 83a...head 83b...shaft 88...screw 90...sealing agent 100A...first space 100B...second space 121...plate-shaped portion 121f...outer surface 122...peripheral wall 122a-122d...wall 122k...notch 122w...opposing wall 123, 123a-123d...flange 123d1...straight flange 123d2...Inclined flange portion 123p...Cover outer protrusion 123s...Tip surface 123t...Cover inner protrusion 125...Communication hole 126...Recess 126b...Bottom wall 128...Filter 131...Base 131s...Edge 132...Side wall portion 132a-132c...Wall portion 134...Protrusion 134h...Wiring insertion hole 135...Screw 138...Filter cover portion 151...Second surface 152...Inclined surface 155...Spacer protrusion S...Gap X...First direction X1...One side X2...Other side Y...Second direction Z...Plate thickness direction Z1...First side Z2...Second side

Claims

1. A substrate on which switching elements for driving a motor are mounted; a case that accommodates the switching element and the substrate, The case is a fixing base having the substrate fixed to a first surface thereof; a cover attached to the fixed base so as to cover at least a portion of the first surface of the fixed base on which the substrate is provided; Equipped with The fixed base is a second surface formed at a distance from the first surface in a thickness direction of the substrate; An inclined surface is provided to connect the first surface and the second surface and extends at an angle with respect to the plate thickness direction, The fixed base has a coatable sealant continuously provided along the first surface, the inclined surface and the second surface, the cover is attached to the fixed base with the sealing agent interposed between the cover and the inclined surface; A motor control device comprising:

2. The fixed base includes a base groove or a base protrusion that is continuously provided along at least the first surface, The cover includes a cover protrusion that fits into the base groove, or a cover groove into which the base protrusion fits.

2. The motor control device according to claim 1 .

3. a connector member provided to penetrate between the inside and the outside of the cover through an opening formed between the fixed base and the cover, and to which an external connector is detachably connected; a resin molded portion is formed between the fixed base and the cover to close a gap between an inner peripheral surface of the opening and an outer peripheral surface of the connector member; 3. The motor control device according to claim 1 or 2.

4. a terminal connection member having an element connection portion connected to the switching element at one end and a terminal portion to which an external wiring is detachably connected at the other end, the fixed base further includes a raised portion that is raised from the first surface in the plate thickness direction to form the inclined surface and the second surface, and supports the terminal portion; The cover is a main cover that covers at least a portion of the first surface of the fixed base where the substrate is provided, and that protrudes the terminal portion in a first direction intersecting the plate thickness direction, and is attached to the fixed base with the sealant interposed between the inclined surface, the second surface, and the terminal portion; a sub-cover detachably provided on the fixed base so as to cover the inclined surface, the second surface, and the terminal portion, 3. The motor control device according to claim 1 or 2.

5. The sealing agent is formed in a planar shape along the inclined surface and the second surface.

3. The motor control device according to claim 1 or 2.

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