Abstract: An inverter device that converts electric power between a direct current and an alternating current. The inverter is configured with an inverter circuit and a control circuit. The control circuit substrate includes a driver circuit that supplies a control signal for each switching element. The driver circuit is placed so as to overlap a mount region of each switching element in the inverter circuit unit as viewed in a direction perpendicular to a substrate surface of the control circuit substrate. The temperature detection circuit is placed so as to overlap a mount region of the one of the upper arm and the lower min of each of the inverter circuit units. The current detection circuit is placed so as to overlap a mount region of the other of the upper arm and the lower arm of each of the legs in the inverter circuit unit.

Abstract: A power supply device for driving has a switching control circuit that switches a switching element for a power source, and an output voltage generation portion that generates a predetermined output voltage in accordance with the switching of the switching element for the power source. In addition, the output voltage generation portion includes an overvoltage detection circuit that detects an overvoltage. Furthermore, the switching control circuit includes an output voltage suppression processing unit that suppresses an increase in the output voltage when the overvoltage is detected. In this case, if the overvoltage is detected, the output voltage suppression processing unit suppresses an increase in the output voltage. In the period of time until an operation of a power supply circuit portion being stopped, the output voltage does not exceed a gate withstand voltage of a power element.

Abstract: A drive power supply for generating inverter drive voltages has a switching control circuit that switches a switching element on a primary side of a transformer to generate drive voltages on the secondary side in connection with the switching of switching elements of the inverter. A feedback circuit generates a feedback voltage corresponding to the drive voltages and supplies the feedback voltage to the switching control circuit to control the drive voltages. An abnormality detecting portion changes the feedback voltage when the voltage of a predetermined terminal fluctuates. Thus when an IG short involving the predetermined terminal occurs, the drive voltages are changed by the switching control circuit sensing the change in the feedback voltage. Since any change in the drive voltages is detected to reliably determine an abnormality, an IG short is detected as an abnormality even though the abnormality has been generated in the drive power supply independent of any prior change in the actual drive voltages.

Abstract: An apparatus for detecting incorrect connector insertion. The apparatus includes a first member including a first connector; a second member including a second connector; a test signal output processing unit that outputs a first test signal to the first member and the second member; a first determination signal outputting portion that outputs a first determination signal in accordance with outputting the first test signal to the first member; and a second determination signal outputting portion that outputs a second determination signal in accordance with outputting the first test signal to the second member. The apparatus further includes a connector-connected state determination processing unit that determines the connected state of the first connector and the second connector based on the first determination signal and the second determination signal.

Abstract: An apparatus for detecting incorrect connector insertion. The apparatus includes a first member including a first connector; a second member including a second connector; a test signal output processing unit that outputs a first test signal to the first member and the second member; a first determination signal outputting portion that outputs a first determination signal in accordance with outputting the first test signal to the first member; and a second determination signal outputting portion that outputs a second determination signal in accordance with outputting the first test signal to the second member. The apparatus further includes a connector-connected state determination processing unit that determines the connected state of the first connector and the second connector based on the first determination signal and the second determination signal.

Abstract: A power supply device for driving has a switching control circuit that switches a switching element for a power source, and an output voltage generation portion that generates a predetermined output voltage in accordance with the switching of the switching element for the power source. In addition, the output voltage generation portion includes an overvoltage detection circuit that detects an overvoltage. Furthermore, the switching control circuit includes an output voltage suppression processing unit that suppresses an increase in the output voltage when the overvoltage is detected. In this case, if the overvoltage is detected, the output voltage suppression processing unit suppresses an increase in the output voltage. In the period of time until an operation of a power supply circuit portion being stopped, the output voltage does not exceed a gate withstand voltage of a power element.

Abstract: A drive power supply for generating inverter drive voltages has a switching control circuit that switches a switching element on a primary side of a transformer to generate drive voltages on the secondary side in connection with the switching of switching elements of the inverter. A feedback circuit generates a feedback voltage corresponding to the drive voltages and supplies the feedback voltage to the switching control circuit to control the drive voltages. An abnormality detecting portion changes the feedback voltage when the voltage of a predetermined terminal fluctuates. Thus when an IG short involving the predetermined terminal occurs, the drive voltages are changed by the switching control circuit sensing the change in the feedback voltage. Since any change in the drive voltages is detected to reliably determine an abnormality, an IG short is detected as an abnormality even though the abnormality has been generated in the drive power supply independent of any prior change in the actual drive voltages.

Abstract: A motor drive device including a substrate, a control unit packaged over the substrate for generating a pulse width modulation signal; insulation means packaged over the substrate, a gate drive circuit packaged over the substrate and connected through the insulation means with the control unit for generating a transistor drive signal in response to the pulse width modulation signal coming from the control unit, and an inverter including a plurality of transistors for generating a phase current by turning ON/OFF the transistors in response to the transistor drive signal coming from the gate driver circuit. A wiring pattern and a substrate ground are formed at the side of the substrate closer to the control unit. Only the wiring pattern is formed at the side of the substrate closer to the gate drive circuit.