Mitsubishi Electric Corporation

Takashi Yagihara

Kenji Ogawa

Yu Kawano

Masaki Matsushita

Takanori Ichikawa

Hiroyuki Kozuki

Masayuki Funakoshi

Takuya Kimura

Takahiro Kunimitsu

Kento Ogiwara

In at least two groups of independent sensors connected to an electronic control device(s), at least two output signal ports are included in a sensor of a first group, and one output signal port is included in a sensor of a second group; and two output signals in the first group have different characteristics while having a constant relationship to each other defined in advance, and the one output signal in the second group has an equivalent characteristic to either one of the two output signals in the first group. The electronic control device(s) includes an abnormality determination unit which is configured in such a manner that all of output signals of the output signal ports are compared, and, for the control by the electronic control device(s), only a normal output signal(s) is used among the output signals thereof having been determined by the abnormality determination unit.

Redundant sensor device and method of determining abnormality of redundant sensor device

The electric power steering device includes a motor and a control unit integrated coaxially therewith at an output shaft end of the motor. The motor has two sets of windings independently of each other. The control unit includes two inverter circuits having a plurality of switching elements for supplying currents, and two control circuits for respectively outputting drive signals to the inverter circuits. The inverter circuits are formed by power modules, and have detection terminals for detecting voltages between both ends of shunt resistors for detecting currents. Shield walls for shielding noise are provided to a heatsink for supporting the power modules and control boards forming the control circuits. The shield walls support the control boards.

Electric power steering device

Growing community of inventors

Tokyo, Japan

Takashi Yagihara