Mitsuba Corporation

Toru Furusawa

Tamotsu Iwazaki

Tomofumi Kobayashi

Naoki Kojima

Takashi Hoshino

Hiroto Tanaka

Tomohiko Annaka

Hiroaki Tanikawa

Shuichi Matsuhashi

Based on an output signal, among a plurality of switching elements, an element control part outputs a PWM signal having a maximum duty ratio to a pair of switching elements that drive a first coil among a plurality of coils to a high level, outputs a PWM signal having a minimum duty ratio to a pair of switching elements that are connected to each other in series and that drive a second coil among the plurality of coils to a low level, and outputs a PWM signal having a medium duty ratio between the maximum duty ratio of the PWM signal and the minimum duty ratio of the PWM signal to a pair of switching elements that are connected to each other in series and that drive a third coil among the plurality of coils.

Motor drive apparatus and motor drive apparatus control method

A brushless motor () which supplies currents to coils (U, U, V, V, W, and W) and rotates a rotor (), the brushless motor comprising a control apparatus () which switches and selectively executes: first energization control to start energization to the coils (U, U, V, V, W, and W) at first timing, and to continue the energization for a first period to control the rotation number of the rotor (); and second energization control to start energization to the coils (U, U, V, V, W, and W) at second timing advanced by an electric angle with respect to the first timing, and to continue the energization for a second period longer than the first period to control the rotation number of the rotor ().

Brushless motor, wiper apparatus, motor apparatus and control method for motor apparatus

An electric power steering device includes an electric motor driven by electric power from a power supply and configured to apply an assisting force to a steering shaft, a booster circuit connected to the power supply and configured to supply a boosting voltage to the electric motor, and a control device configured to manage at least one of a boosting duration time that is a continuous operation time of the booster circuit and a boosting prohibition time that is a continuous stoppage time of the booster circuit on the basis of a boosted electric power value during an operation of the booster circuit.

Electric power steering device

Growing community of inventors

Kiryu, Japan

Toru Furusawa