Taiyo Yuden Co., Ltd.

Microspace Corporation

Kuniaki Kawagoe

Yasuo Hosaka

Kazuo Asanuma

Satoru Shimizu

Masato Tanaka

Hirokazu Shirakawa

In one aspect, a controller for driving a motor of the present invention includes a driving control unit that controls driving of a motor, and a regenerative control unit that instructs the driving control unit to start regeneration when a signal from a pedal rotation sensor that detects a rotation direction of the pedal indicates that the rotation direction of the pedal is backwards, the regenerative control unit controlling an amount of the regeneration in accordance with a backward rotation amount of the pedal while the rotation direction of the pedal is backwards, the backward rotation amount being obtained by the pedal rotation sensor.

Controller for driving a motor, and electric power assisted vehicle

In one aspect, a controller for driving a motor of the present invention includes a driving control unit that controls driving of a motor, and a regenerative control unit that instructs the driving control unit to start regeneration when a signal from a pedal rotation sensor that detects a rotation direction of a pedal indicates that the rotation direction of the pedal is backwards, the regenerative control unit controlling an amount of the regeneration in accordance with a rotation amount of the pedal while the rotation direction of the pedal is backwards, the rotation amount being obtained by the pedal rotation sensor.

An appropriate motor control in accordance with a pedal operation of a driver is to be achieved. A motor drive control device according to the present invention is a motor drive control device for an electric power-assisted vehicle that has one-way clutches respectively provided for a motor drive system and for a pedal drive system. The motor drive control device according to the present invention includes: a first calculating part that calculates a pedal rotation conversion speed that is converted from a pedal rotation; and a second calculating part that calculates a second target torque for a motor based on the pedal rotation conversion speed, during a period in which a first target torque derived from a pedal torque is not detected.

Motor drive control device

A controller for driving a motor in a motor driven vehicle, provided with: a detection part, a control coefficient computing part, and a control part. The control coefficient computing part identifies, as a first vehicle speed, the speed of the vehicle when the detection part detects a start signal for regeneration control, the control coefficient computing part assigning a prescribed value to a control coefficient that determines a value of a control parameter that controls the motor relative to a target value of the control parameter. The target value is a value of the control parameter at which the motor achieves a desired power generation efficiency, and the control coefficient computing part increases the control coefficient if a current vehicle speed becomes faster than the first vehicle speed, and decreases the control coefficient if the current vehicle speed becomes slower than the first vehicle speed.

Growing community of inventors

Gunma, Japan

Kuniaki Kawagoe