Abstract: A vehicle driving device includes an inverter which drives a motor. The inverter includes: a three-phase bridge circuit including a plurality of switching elements; a three-phase short circuit which short-circuits three phases of the motor via the three-phase bridge circuit; and a control circuit. The control circuit includes: a microprocessor which drives the three-phase bridge circuit; a malfunction notification circuit which outputs a malfunction notification signal when the microprocessor is malfunctioning; and a latch circuit which holds the malfunction notification signal outputted from the malfunction notification circuit. The control circuit outputs a three-phase short-circuit drive signal which drives the three-phase short circuit, based on the malfunction notification signal held by the latch circuit.

Abstract: A vehicle driving device includes an inverter which drives a motor. The inverter includes: a three-phase bridge circuit including a plurality of switching elements; a three-phase short circuit which short-circuits three phases of the motor via the three-phase bridge circuit; and a control circuit. The control circuit includes: a microprocessor which drives the three-phase bridge circuit; a malfunction notification circuit which outputs a malfunction notification signal when the microprocessor is malfunctioning; and a latch circuit which holds the malfunction notification signal outputted from the malfunction notification circuit. The control circuit outputs a three-phase short-circuit drive signal which drives the three-phase short circuit, based on the malfunction notification signal held by the latch circuit.

Abstract: The present disclosure reduces parasitic inductances of current paths between components. First conductor path is provided on a surface of insulating layer. One of a power supply voltage and a ground voltage is applied to first conductor path. Second conductor path is provided on the surface of insulating layer. The other of the power supply voltage and the ground voltage is applied to second conductor path. First switching element is connected to output pattern and to first conductor path. Second switching element is connected to output pattern and to second conductor path. At least one of first conductor path and second conductor path has a continuous annular path.

Abstract: The present disclosure reduces parasitic inductances of current paths between components. First conductor path is provided on a surface of insulating layer. One of a power supply voltage and a ground voltage is applied to first conductor path. Second conductor path is provided on the surface of insulating layer. The other of the power supply voltage and the ground voltage is applied to second conductor path. First switching element is connected to output pattern and to first conductor path. Second switching element is connected to output pattern and to second conductor path. At least one of first conductor path and second conductor path has a continuous annular path.

Abstract: A vehicular power source device includes a first generator that generates electric power by rotating a rotor, a second generator that rotates at a higher rotation speed than an upper limit of a rotation speed of the first generator to generate electric power, a detector that detects the rotation speed of the first generator, and a controller that controls power generation of the first and second generators. The controller causes the first generator to generate electric power when the rotation speed of the first generator detected by the detector is not larger than the upper limit of the rotation speed of the first generator, and causes only the second generator to generate electric power when the rotation speed of the first generator detected by the detector is larger than the upper limit of the rotation speed of the first generator.