Abstract: A power converting apparatus includes a housing base, a main body, an air duct, a pair of upright air duct walls, first and second heat generators, and a protrusion. The housing base has first and second surfaces. The main body is on the first surface. The air duct is for cooling air to flow through the air duct and is on the second surface. The upright air duct walls are on the second surface and extend from an upwind side to a downwind side. The first and second heat generators are disposed in series from the upwind side to the downwind side in the air duct. The protrusion is between the first and second heat generators to protrude from at least one of the pair of air duct walls toward a center portion of an air-flowing space for the cooling air.

Abstract: An electric power converter includes a cooler and an electronic circuit. The cooler includes a heat sink, a cooling fan, and a wind tunnel. A plurality of radiator fins are provided on a heat-sink base in the heat sink. The cooling fan is configured to feed cooling air through the plurality of radiator fins. The wind tunnel covers the plurality of radiator fins and the cooling fan. The electronic circuit includes a plurality of rectifiers and a plurality of input terminals. The plurality of rectifiers are provided on a side of the heat-sink base opposite to the plurality of radiator fins and are arranged side by side in a longitudinal direction of the heat-sink base. The plurality of input terminals are connected to the plurality of rectifiers with band-shaped conductors and are provided on a side of the plurality of rectifiers opposite to the heat sink.

Abstract: A motor control apparatus includes a housing base. A main body is disposed on a first surface of the housing base and includes a plurality of electronic components associated with driving of the motor. An air duct is disposed on a second surface of the housing base, and cooling air flows through the air duct. A through hole is disposed in the housing base and has a tapered inner surface. A bush is fitted and secured in the through hole. The bush has a tapered outer surface and includes a cable insertion hole and a close contact portion. A cable is disposed through the cable insertion hole and the housing base and is wired between the main body and the air duct. The cable has an outer surface in close contact with the close contact portion of the bush outside the through hole.

Abstract: A power converting apparatus includes a housing base, a main body, an air duct, a pair of upright air duct walls, first and second heat generators, and a protrusion. The housing base has first and second surfaces. The main body is on the first surface. The air duct is for cooling air to flow through the air duct and is on the second surface. The upright air duct walls are on the second surface and extend from an upwind side to a downwind side. The first and second heat generators are disposed in series from the upwind side to the downwind side in the air duct. The protrusion is between the first and second heat generators to protrude from at least one of the pair of air duct walls toward a center portion of an air-flowing space for the cooling air.

Abstract: A power conversion apparatus includes a casing and an inverter unit housed in the casing. The inverter unit includes a unit case, a capacitor block removably provided at a position on an inner side of a detachable side plate of the unit case, and a fan block placed in the unit case in such a manner as to be removable from a front side. The capacitor block includes a capacitor case having a plurality of capacitor insertion holes, a plurality of electrolytic capacitors placed in the capacitor insertion holes, respectively, and a laminated bus bar connected to the electrolytic capacitors. The fan block includes a fan case and a cooling fan provided in the fan case.

Abstract: An electric power converter includes a cooler and an electronic circuit. The cooler includes a heat sink, a cooling fan, and a wind tunnel. A plurality of radiator fins are provided on a heat-sink base in the heat sink. The cooling fan is configured to feed cooling air through the plurality of radiator fins. The wind tunnel covers the plurality of radiator fins and the cooling fan. The electronic circuit includes a plurality of rectifiers and a plurality of input terminals. The plurality of rectifiers are provided on a side of the heat-sink base opposite to the plurality of radiator fins and are arranged side by side in a longitudinal direction of the heat-sink base. The plurality of input terminals are connected to the plurality of rectifiers with band-shaped conductors and are provided on a side of the plurality of rectifiers opposite to the heat sink.

Abstract: A power conversion apparatus includes a casing and an inverter unit housed in the casing. The inverter unit includes a unit case, a capacitor block removably provided at a position on an inner side of a detachable side plate of the unit case, and a fan block placed in the unit case in such a manner as to be removable from a front side. The capacitor block includes a capacitor case having a plurality of capacitor insertion holes, a plurality of electrolytic capacitors placed in the capacitor insertion holes, respectively, and a laminated bus bar connected to the electrolytic capacitors. The fan block includes a fan case and a cooling fan provided in the fan case.