Abstract: An inverter control board that is configured to be connected to an inverter for performing conversion between direct current power and multiple-phase alternating current power, wherein the inverter has arms, each arm provided for one alternating current phase and comprising a series circuit of a high-side switching element to be connected to a direct-current positive electrode and a low-side switching element to be connected to a direct-current negative electrode.

Abstract: An amplitude of current ripples on a primary side of a power supply device that uses a plurality of transformers is reduced. A driving power supply device (7) that supplies electric power to a plurality of drive circuits (2) that individually drive switching elements (3) of an inverter (10) includes a plurality of transformers (L) having secondary-side coils (Ls) which are individually connected to the respective corresponding drive circuits (2); a plurality of transformer driving units (5) each including a driving switching element (M) that controls supply of electric power to a primary-side coil (Lp); and a power supply control device (6) that provides transformer drive signals (MG) for driving the transformer driving units (5). The power supply control device (6) drives the transformer driving units (5) by transformer drive signals (MG) having different phases.

Abstract: An inverter control board that is configured to be connected to an inverter for performing conversion between direct current power and multiple-phase alternating current power, wherein the inverter has arms, each arm provided for one alternating current phase and comprising a series circuit of a high-side switching element to be connected to a direct-current positive electrode and a low-side switching element to be connected to a direct-current negative electrode.

Abstract: An amplitude of current ripples on a primary side of a power supply device that uses a plurality of transformers is reduced. A driving power supply device (7) that supplies electric power to a plurality of drive circuits (2) that individually drive switching elements (3) of an inverter (10) includes a plurality of transformers (L) having secondary-side coils (Ls) which are individually connected to the respective corresponding drive circuits (2); a plurality of transformer driving units (5) each including a driving switching element (M) that controls supply of electric power to a primary-side coil (Lp); and a power supply control device (6) that provides transformer drive signals (MG) for driving the transformer driving units (5). The power supply control device (6) drives the transformer driving units (5) by transformer drive signals (MG) having different phases.

Abstract: A control board of a power conversion device, the control board includes a board main body, a plurality of drive circuits, a power source control circuit, an insulation region, a plurality of insulation transformers, and a connecting line that electrically connects the plurality of insulation transformers and the power source control circuit to each other, and at least a part of which extends in a region in inner layers of the board main body that overlaps the insulation region when viewed in a perpendicular direction with respect to the surface of the board main body.

Abstract: A control board where the ground potential includes a first conductor extending from the ground terminal of the power source generator to a first branch, a second conductor branching at the first branch, extending to the temperature detector, and electrically connected to only the temperature detector on a downstream side of the first branch, and a third conductor branching in a direction not directed to the second conductor at the first branch and extending to the drive.

Abstract: A control board of a power conversion device, the control board includes a board main body, a plurality of drive circuits, a power source control circuit, an insulation region, a plurality of insulation transformers, and a connecting line that electrically connects the plurality of insulation transformers and the power source control circuit to each other, and at least a part of which extends in a region in inner layers of the board main body that overlaps the insulation region when viewed in a perpendicular direction with respect to the surface of the board main body.

Abstract: A control board for a power conversion device, the control board including a board body that is a multilayer board; a first circuit mounted on a first surface of the board body and including a heat generator; a second circuit mounted on the first surface of the board body, the second circuit using a voltage different from a voltage of the first circuit; an insulation region formed on the first surface of the board body, the insulation region performing insulation between the first circuit and the second circuit; and a pattern of a thermal conductive material formed on an internal layer of the board body, extending in a region overlapping with the insulation region as seen from a direction orthogonal to the first surface of the board body, and thermally connected to the heat generator.

Abstract: A control board where the ground potential includes a first conductor extending from the ground terminal of the power source generator to a first branch, a second conductor branching at the first branch, extending to the temperature detector, and electrically connected to only the temperature detector on a downstream side of the first branch, and a third conductor branching in a direction not directed to the second conductor at the first branch and extending to the drive.

Abstract: A controller for a power converter that includes a multilayer board; a microcomputer that is implemented in a first area on one surface of the multilayer board; a power IC that is implemented in a second area on the other surface of the multilayer board; and a wiring that is formed in the multilayer board, and connects the microcomputer and the power IC to each other, wherein the second area is configured to be included in the first area when viewed in a normal direction of the multilayer board, and the multilayer board includes a portion of a ground potential in the second area when viewed in the normal direction of the multilayer board.

Abstract: A compact inverter device that includes a power module having a switching element and a smoothing capacitor that converts electric power between DC power and AC power. The inverter is configured with a plate-like DC bus board to which the smoothing capacitor is fixed, a fixing member that maintains a relative positional relation between the DC bus board. The DC bus board has a plurality of connection positive terminals that are electrically connected to the positive electrode pattern and that are respectively electrically connected to the positive terminals of the plurality of power modules. The DC bus board and power modules are fixed to the fixing member by connection positive terminal and positive terminals through a common fastening member, and similarly on the negative terminals.

Abstract: A compact inverter device that includes a power module having a switching element and a smoothing capacitor that converts electric power between DC power and AC power. The inverter is configured with a plate-like DC bus board to which the smoothing capacitor is fixed, a fixing member that maintains a relative positional relation between the DC bus board. The DC bus board has a plurality of connection positive terminals that are electrically connected to the positive electrode pattern and that are respectively electrically connected to the positive terminals of the plurality of power modules. The DC bus board and power modules are fixed to the fixing member by connection positive terminal and positive terminals through a common fastening member, and similarly on the negative terminals.

Abstract: A motor control device has a plurality of drive circuits that are respectively provided on arms of an inverter circuit that supplies current to an AC motor, the plurality of drive circuits driving respectively a plurality of switching elements included on the arms; a power source control circuit that performs a control of a plurality of power supply circuits that supply power respectively to the plurality of drive circuits; a low-voltage circuit area that includes the power source control circuit; a plurality of high-voltage circuit areas, each high-voltage circuit area including a drive circuit from the plurality of drive circuits; and a plurality of transformers that serve as the plurality of power supply circuits and respectively join the low-voltage circuit area and the plurality of high-voltage circuit areas in an insulated state.

Abstract: A motor control device has a drive circuit that is respectively provided on arms of an inverter circuit supplying current to an AC motor, and that drives a switching element included on the arms; and a power source control circuit that performs a control of a power supply circuit for supplying power to the drive circuit. A low-voltage circuit area is provided including the power source control circuit. A high-voltage circuit area includes one drive circuit, wherein a plurality of the high-voltage circuit areas is disposed aligned on both sides of the low-voltage circuit area such that the low-voltage circuit area is provided therebetween and also disposed with a predetermined distance provided between the high-voltage circuit area and the low-voltage circuit area. A transformer serving as the power supply circuit respectively joins the low-voltage circuit area and the high-voltage circuit areas.