Nissan Motor Company Limited

Akihiro Hanamura

Yasuhiko Kitajima

Makoto Iwashima

Masakazu Kobayashi

Yuki Nakajima

Yutaro Kaneko

Masahiro Tsukamoto

Tadayuki Hatsuda

Toshiro Shinohara

Hiroyuki Kaneko

Kouichirou Yonekura

Masanori Yamagiwa

A drive unit for an electric vehicle is comprised of a motor, an inverter which supplies alternating current electric power to the motor, a speed reducer which is connected to the motor, and a cooling system which cools the motor, the inverter and the speed reducer. The speed reducer reduces a revolution speed of a mechanical output of the motor. The cooling system comprises a heat exchanger at which first refrigerant for receiving heat of at least one of the motor and the inverter receives heat of second refrigerant for receiving heat of at least one of the motor and the speed reducer.

Drive unit for electric vehicle

A power converter that is arranged in series with a motor to form a unitary structure through which an output shaft extends is provided with a plurality of coolers and a power semiconductor module mounted on a cooling surface of at least one of the plurality of coolers to supply electric power to a motor. Each of the plurality of coolers is disposed along an extending direction radially extending from an output shaft to be perpendicular to the output shaft. The cooling surface is provided along such an extending direction.

Power converter and related method

An integrated drive motor unit which is integrally constituted of a motor, an inverter and a reducer differential unit arranged in a row, and a frame member. The reducer differential unit is connected to an output shaft of the motor, and distributes torque of the motor to a pair of axles, one of which passes through the inverter. The frame member constitutes a part of the motor and a part of the reducer differential unit, and has a portion surrounding the axle passing through the inverter. The inverter is disposed outside the frame member.

Integrated drive motor/differential/inverter unit with improved housing for a vehicle

A power wiring structure realizes low inductance and is applicable to a semiconductor device. The power wiring structure employs two switching elements that are connected in series and are complementarily turned on and off. Ends of the switching elements are connected to power lines extending from a power source. A node between the switching elements is connected to an output line U that is connected to load. The power lines are a high-potential power line P and a low-potential power line N. The lines P, N, and U are each a wide electrode with the width thereof greater than the thickness thereof. The electrodes are layered one upon another in a thickness direction in order of P, U, and N to form a three-layer wide electrode structure. A current of the same value as and oppositely oriented from a current flowing through the output line U flows through the power line P or N, to cancel magnetic fields generated by the currents, thereby effectively reducing wiring inductance.

Low inductance power wiring structure and semiconductor device

Growing community of inventors

Yokohama, Japan

Akihiro Hanamura