Mitsubishi Electric Corporation

Mamoru Shiraki

Tatsuya Mori

Hiroshi Nishimura

Isao Kezobo

Yoshihiko Kimpara

Chiaki Fujimoto

Yuji Takatsuka

Atsushi Ito

Katsuya Ikemoto

Kenta Tanaka

Yasuaki Hori

Hiroya Natsuhara

Masashi Iwane

Yusuke Takarada

Yuya Takeuchi

To provide a controller for AC rotary machine which can detect current of the normal phase certainly when the short circuit failure of one phase occurs, in an apparatus that a current sensor is connected in series to the positive electrode side switching device or the negative electrode side switching device of an inverter. A controller for AC rotary machine, when determining that the short circuit failure of any one phase occurred, calculates voltage command values of normal n−1 phases, and changes the voltage command values of the normal n−1 phases so that on period of the detection object device of each phase of the normal n−1 phases become longer than or equal to a length necessary for current detection at least at a current detection timing.

Controller for AC rotary machine

In a CPU () for calculating a control amount of an electric power steering control apparatus including a motor for assisting a steering force of a steering wheel generated by a driver of a vehicle, a filter section () subjects a value of a motor rotation speed calculating section () for calculating an rotation speed of a motor () to filter processing, to thereby output the resultant value to a target d-axis current value setting section (). With this configuration, in a high-torque and high-motor-rotation speed region, responsiveness of a target d-axis current value with respect to the motor rotation speed is decreased, to thereby suppress vibrations and noise when the steering wheel is operated.

Electric power steering control apparatus and steering control method

A control device for an AC rotating machine includes a voltage command calculation means () that calculates voltage commands on rotation two axes and a voltage applying means () that applies a voltage to an AC rotating machine (), based on voltage commands on the rotation two axes outputted by the voltage command calculation means (); the voltage command calculation means () calculates first-axis and second-axis voltage commands on the rotation two axes and reduces the limit value of the second-axis voltage command in proportion to the squared first-axis voltage command.

Control device for alternating current rotating machine and electric power steering device equipped with control device for alternating current rotating machine

An electric power steering apparatus is configured in such a way as to include a first filtering unit that applies filtering processing to the detected steering torque signal and outputs the processed torque signal; a control unit that generates and outputs a motor drive signal, based on a steering torque signal outputted from a first filtering unit; a second filtering unit that applies filtering processing to the detected steering torque signal and outputs the processed torque signal; and an interlock unit that generates and outputs a motor drive inhibition signal, based on the steering torque signal outputted from the second filtering unit. The second filtering unit performs filtering processing in such a way as to output a steering torque signal the same as or similar to the steering torque signal that is outputted from the first filtering unit at least when a vehicle is in a predetermined driving condition.

Electric power steering apparatus

Growing community of inventors

Kobe, Japan

Mamoru Shiraki