Shinano Kenshi Kabushiki Kaisha

Yachiyo Kogyo Kabushiki Kaisha

Yoshikazu Ito

Yutaka Nagai

Tomokazu Murakami

Takahiro Maruyama

Kazutaka Sugimoto

Takashi Kanai

Munehiro Kawai

The open/close body drive device is capable of restarting a brushless motor, without using magnetic pole sensors, so as to securely drive an open/close body in an arbitrary direction when any of the magnetic pole sensors has failed. When a CPU () detects an abnormal logic as a detection pattern of the magnetic pole sensors (), the CPU () determines that the sensor has failed and temporarily stops drive of a DC brushless motor (), and a motor drive unit () generates a phase switching signal to prolong one of electric connection patterns for performing sensorless drive when restarting the DC brushless motor ().

Open/close body drive device

The sun roof drive device opens and closes a vehicle sun roof by a DC brushless motor, which is driven by rectangular waves when high torque is required at a low rotational speed and which is driven by sinusoidal waves or pseudo-sinusoidal waves when low noise is required.

Sun roof drive device

Growing community of inventors

Sakura, Japan

Yoshikazu Ito