Abstract: A power converting apparatus includes a switching element, a filter substrate, a housing, a main body, an air duct, and a filter switch. The switching element is configured to convert and output power. The filter substrate includes a filter circuit configured to reduce transmission of noise generated in the switching element to an input power source. The housing includes a housing base having a first surface and a second surface. The main body is on the first surface of the housing base, and includes the filter substrate and a plurality of electronic components. The air duct is disposed on the second surface of the housing base, and cooling air flows through the air duct. The filter switch is on the first surface of the housing base. The filter switch is configured to switch between making and breaking electrical conduction between the filter circuit and the housing.

Abstract: A matrix converter includes first to third AC reactors connected in series with first- to third-phase outputs of three-phase AC electric power, and a first cooling fan that generates cool air for cooling the first to third AC reactors. The first to third AC reactors are arranged side-by-side in a direction intersecting a direction in which the cool air flows.

Abstract: A power converting apparatus includes a housing, a cable, and a grommet supporting member. The housing includes a housing base, a main body, and an air duct. The housing base has a first surface and a second surface and includes a through hole. The main body includes a plurality of electronic components on the first surface of the housing base. The air duct is disposed on the second surface of the housing base, and cooling air flows through the air duct. The cable is disposed through the through hole of the housing base so as to be wired between the main body and the air duct. The grommet supporting member is in the air duct or the main body. The grommet supporting member supports a grommet through which the cable is disposed. The grommet supporting member is not integral with the housing base.

Abstract: A power converting apparatus includes a housing, a cylindrical capacitor, and a cylindrical capacitor cover. The housing includes a housing base, a main body, and an air duct. The main body includes a plurality of electronic components on a first surface of the housing base. The air duct is disposed on a second surface of the housing base. The capacitor penetrates through the housing base so that a part of the capacitor is disposed in the main body while a rest part of the capacitor is disposed in the air duct. The capacitor cover is disposed on the housing base and covers the rest part of the capacitor. The capacitor cover includes an elastic material and an inner surface. The capacitor cover includes a groove disposed on the inner surface in an axial direction of the capacitor cover.

Abstract: An electronic device includes a main body having an air inlet port and an air outlet port, an air channel having an air inlet port and an air outlet port and is arranged such that the air channel and the main body oppose each other, a boundary base disposed between the main body and the air channel, a heat sink mounted on the boundary base such that a fin thereof protrudes into the air channel, a power converter tightly mounted on an upper surface of a base of the heat sink so as to be positioned in the main body, cooling fans disposed near the air outlet port of the main body and the air outlet port of the air channel, and a first reactor disposed on a windward side of the heat sink in the air channel.

Abstract: A power converting apparatus includes a housing, a self-standing cable, and a grommet securing member. The housing includes a housing base, a main body, and an air duct. The housing base includes a through hole. The main body includes a plurality of electronic components on a first surface of the housing base. The air duct is disposed on a second surface of the housing base. The self-standing cable is disposed through the through hole so as to be wired between the main body and the air duct. The self-standing cable stands on itself in a direction approximately orthogonal to the housing base. The grommet securing member is disposed in the air duct or the main body so as to secure a grommet to the through hole. The grommet securing member is not integral with the housing base.

Abstract: A matrix converter includes a plurality of semiconductor switch modules, and a plurality of snubber modules each having a plurality of capacitors and a plurality of diodes. Each of the snubber modules has a terminal group projecting outward, a first terminal, and a second terminal. The first and second terminals project from positions different from the terminal group, and are connected to an external circuit provided outside the matrix converter. Terminals of the terminal group are connected to terminals of a corresponding semiconductor switch module. The first terminals of the plurality of snubber modules are connected to one another via a first bus bar, and the second terminals are connected to one another via a second bus bar.

Abstract: A stud bolt according to the embodiments includes a first male screw portion and a second male screw portion on both sides, respectively. The second male screw portion has an outer diameter different from that of the first male screw portion, and a first recessed portion is formed in an end portion of the second male screw portion.

Abstract: A power converting apparatus includes a housing, a self-standing cable, and a grommet securing member. The housing includes a housing base, a main body, and an air duct. The housing base includes a through hole. The main body includes a plurality of electronic components on a first surface of the housing base. The air duct is disposed on a second surface of the housing base. The self-standing cable is disposed through the through hole so as to be wired between the main body and the air duct. The self-standing cable stands on itself in a direction approximately orthogonal to the housing base. The grommet securing member is disposed in the air duct or the main body so as to secure a grommet to the through hole. The grommet securing member is not integral with the housing base.

Abstract: A power converting apparatus includes a housing, a cable, and a grommet supporting member. The housing includes a housing base, a main body, and an air duct. The housing base has a first surface and a second surface and includes a through hole. The main body includes a plurality of electronic components on the first surface of the housing base. The air duct is disposed on the second surface of the housing base, and cooling air flows through the air duct. The cable is disposed through the through hole of the housing base so as to be wired between the main body and the air duct. The grommet supporting member is in the air duct or the main body. The grommet supporting member supports a grommet through which the cable is disposed. The grommet supporting member is not integral with the housing base.

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 switching element, a filter substrate, a housing, a main body, an air duct, and a filter switch. The switching element is configured to convert and output power. The filter substrate includes a filter circuit configured to reduce transmission of noise generated in the switching element to an input power source. The housing includes a housing base having a first surface and a second surface. The main body is on the first surface of the housing base, and includes the filter substrate and a plurality of electronic components. The air duct is disposed on the second surface of the housing base, and cooling air flows through the air duct. The filter switch is on the first surface of the housing base. The filter switch is configured to switch between making and breaking electrical conduction between the filter circuit and the housing.

Abstract: A power converting apparatus includes a housing, a cylindrical capacitor, and a cylindrical capacitor cover. The housing includes a housing base, a main body, and an air duct. The main body includes a plurality of electronic components on a first surface of the housing base. The air duct is disposed on a second surface of the housing base. The capacitor penetrates through the housing base so that a part of the capacitor is disposed in the main body while a rest part of the capacitor is disposed in the air duct. The capacitor cover is disposed on the housing base and covers the rest part of the capacitor. The capacitor cover includes an elastic material and an inner surface. The capacitor cover includes a groove disposed on the inner surface in an axial direction of the capacitor cover.

Abstract: A motor control apparatus is configured to control driving of a motor. The motor control apparatus includes a housing base, a main portion, an air duct, a heat dissipating component, and a heat sink. The housing base has one surface and another surface. The main portion is on the one surface of the housing base and includes a substrate. Through the air duct, cooling air passes. The air duct is on the other surface of the housing base. The heat dissipating component is on the one surface of the housing base and is coupled to the substrate. The heat sink includes a base portion and at least one fin. The heat sink is on the other surface of the housing base at a position corresponding to the heat dissipating component with the housing base disposed between the base portion and the heat dissipating component.

Abstract: A fan unit holds a cooling fan and is detachable from a main body of an inverter apparatus. The fan unit is provided with a fan-unit retainer plate having keyhole-shaped apertures and provided between an upper case and a lower case. The fan unit is fixed by pressing the fan-unit retainer plate with fixing screws. The fan unit is easily and reliably removed by moving the fan-unit retainer plate without directly moving the fan unit and without removing the fixing screws.

Abstract: An electronic device includes a main body having an air inlet port and an air outlet port, an air channel having an air inlet port and an air outlet port and is arranged such that the air channel and the main body oppose each other, a boundary base disposed between the main body and the air channel, a heat sink mounted on the boundary base such that a fin thereof protrudes into the air channel, a power converter tightly mounted on an upper surface of a base of the heat sink so as to be positioned in the main body, cooling fans disposed near the air outlet port of the main body and the air outlet port of the air channel, and a first reactor disposed on a windward side of the heat sink in the air channel.

Abstract: A matrix converter includes a plurality of semiconductor switch modules, and a plurality of snubber modules each having a plurality of capacitors and a plurality of diodes. Each of the snubber modules has a terminal group projecting outward, a first terminal, and a second terminal. The first and second terminals project from positions different from the terminal group, and are connected to an external circuit provided outside the matrix converter. Terminals of the terminal group are connected to terminals of a corresponding semiconductor switch module. The first terminals of the plurality of snubber modules are connected to one another via a first bus bar, and the second terminals are connected to one another via a second bus bar.

Abstract: A matrix converter includes first to third AC reactors connected in series with first- to third-phase outputs of three-phase AC electric power, and a first cooling fan that generates cool air for cooling the first to third AC reactors. The first to third AC reactors are arranged side-by-side in a direction intersecting a direction in which the cool air flows.

Abstract: A fan unit holds a cooling fan and is detachable from a main body of an inverter apparatus. The fan unit is provided with a fan-unit retainer plate having keyhole-shaped apertures and provided between an upper case and a lower case. The fan unit is fixed by pressing the fan-unit retainer plate with fixing screws. The fan unit is easily and reliably removed by moving the fan-unit retainer plate without directly moving the fan unit and without removing the fixing screws.