Fujitsu Ten Limited

Jtekt Corporation

Norimitsu Yukumatsu

Shigeki Nagase

Akio Okahara

Tomohiko Tamaki

Takayuki Seto

Provided is a vehicle abnormality detecting device including an abnormality detecting unitA for detecting abnormality on the basis of a state of current supply to a state detecting unit, and a power supply control unitfor switching a state of power supply to the state detecting unitwhen the abnormality was detected by the abnormality detecting unitA, so that power consumption at the time of detecting the abnormality is suppressed to avoid the battery consumption.

Vehicle abnormality detecting device

In a controller for an electric power steering apparatus, a target value calculation element, which calculates target values of the drive currents of a motor on the basis of a detected value of the steering torque, is constituted by a first integrated circuit provided in a chip. A drive signal value calculation element, which calculates drive signal values for driving the motor on the basis of the target values calculated by the target value calculation element, detected values of the drive currents of the motor, and a detected value of the rotary position of a rotor of the motor, is constituted by a second integrated circuit provided in another chip from the chip. A driving element drives the motor in accordance with the drive signal values. The first integrated circuit is connected communicably to the second integrated circuit. The calculation cycle of the drive signal values is set to be shorter than the calculation cycle of the target values.

Controller for electric power steering apparatus

An apparatus corrects a current value of a three-phase electric motor including a current detector that detects current of each of three phases including a first phase, a second phase, and a third phase. The apparatus includes a current-value correcting unit. When current of one of the first to third phase is zero-crossing, the current-value correcting unit corrects a current value of at least one of the others of the first to third phases on a basis of a correlation between detection values of the current detectors provided for the others of the first to third phases during a period in which the three-phase electric motor is operating.

Growing community of inventors

Kobe, Japan

Norimitsu Yukumatsu