Asmo Co., Ltd.

Denso Corporation

Mikihiro Kondoh

Yukio Honda

Hiroshi Takahashi

Kaneyoshi Nagatani

Electric current supplied to a DC motor and a rotational speed thereof are measured. An inductive voltage is calculated based on a relationship that the elapse of time after the application of a voltage to the DC motor is stopped is proportional to the voltage across the terminals of the DC motor. The electric current supplied to the DC motor when the rotation of the DC motor is locked is measured by applying the voltage to the DC motor when a magnetic pole of a stator of the DC motor is not magnetized. The torque of the DC motor when the rotation of the DC motor is locked is measured based on the electric current supplied to the DC motor and the rotational speed thereof when it rotates, the electric current supplied to the DC motor when the rotation of the DC motor is locked, and the inductive voltage. The torque of the DC motor when the rotation of the DC motor is locked is used to determine the torque characteristics thereof.

Method of measuring characteristics of a DC motor, apparatus for

An automobile wiper device includes a variable-driving unit capable of adjustably changing at least one of the arm pressure and the wiping area of the wiper device.

Growing community of inventors

Okazaki, Japan

Mikihiro Kondoh