Kabushiki Kaisha Toyota Jidoshokki

Satoshi Okada

Yoshifumi Tada

Yusuke Kinoshita

Hiroshi Fukasaku

Takashi Kawashima

Yoshiki Nagata

Kazuki Najima

Fumihiro Kagawa

Tetsuya Yamada

Takao Kawasaki

Shinya Sato

Kenji Maemura

Katsuya Usami

Yuta Wato

Atsushi Oshima

Yuma Sato

A substrate includes first connection patterns, a first aggregation pattern, second connection patterns, and a second aggregation pattern. The first connection patterns are respectively provided for first terminals of shunt resistors and electrically connected to the first terminals. The first aggregation pattern extends in an arrangement direction of the shunt resistors and aggregates the first connection patterns. The first aggregation pattern is electrically connected to a first end of a first sensing pattern and has a wider pattern width than the first sensing pattern. The second connection patterns are respectively provided for second terminals of the shunt resistors and electrically connected to the second terminals. The second aggregation pattern extends in the arrangement direction and aggregates the second connection patterns. The second aggregation pattern is electrically connected to a first end of a second sensing pattern and has a wider pattern width than the second sensing pattern.

Current detection circuit

An electric compressor includes an inverter portion that includes a circuit board, a busbar fixed to the inverter housing and connecting an external power supply to the circuit board, a noise reduction circuit mounted on the circuit board, a first fastener fastening the circuit board to the inverter housing, and a second fastener fastening the busbar to the circuit board. The circuit board includes a first fastening hole through which the first fastener is inserted, a second fastening hole that is disposed adjacent to the first fastening hole and through which the second fastener is inserted, and a slit extending between the first fastening hole and the second fastening hole from a peripheral edge of the circuit board. The first fastener electrically connects the circuit board as a ground of the noise reduction circuit to the inverter housing.

Electric compressor

An electric compressor includes an electric motor, and a motor controller configured to drive the electric motor. The motor controller includes a high voltage circuit board on which switching elements are mounted, a low voltage circuit board on which a control circuit controlling switching operation of the switching elements is mounted, an input connector, an output connector, and a current sensor. The high voltage circuit board and the low voltage circuit board are stacked with each other. The output connector is integrated with a detection busbar that provides electrical connection between the high voltage circuit board and the low voltage circuit board, and through which detection signals indicative of the output current are output to the control circuit.

A motor-driven compressor for a vehicle includes a housing, a compression unit, a motor, and an inverter device. The inverter device includes an inverter circuit, a capacitor, a current sensor, a determination means configured to control switching elements in response to the current sensor not detecting a flow of current when the motor stops operating and configured to determine whether or not the current sensor detects a flow of current when controlling the switching elements, and a discharge starting means configured to start discharging the capacitor when the determination means determines that the flow of current has not been detected.

Motor-driven compressor for a vehicle

An inverter includes a bus bar as a wiring and a ferrite core that covers the bus bar to absorb electromagnetic noise from the bus bar. The bus bar and ferrite core are integrated by mold forming using a resin material in a state of exposing a part of the ferrite core.

On-vehicle electronic device and motor-driven compressor

Growing community of inventors

Kariya, Japan

Satoshi Okada