Omron Corporation

Tokihiko Sugiura

Yasuhide Tanaka

Yoshihiro Ikushima

Yoichi Sakuma

Akihiko Hirata

Shinji Miura

Tetsuo Takano

Takeshi Sekine

A driving device for a motor has a mounting substrate mounted to a base substrate. Highly heat-generating components such as a switching element for PWM control are mounted to the mounting substrate and only less heat-generating circuit components are mounted to the base substrate. The mounting substrate has a base plate part made of a metallic plate material surround by a molded insulating material but includes a heat dissipating part where the insulating material is removed and the internal metallic plate material is exposed.

Mounting substrate and driving device using same

An actuating device for a motor used in a power window of an automobile which can drive the motor reliably to open the window even when the automobile is submerged in water. This device has a simple configuration is relatively small and inexpensive. This activating device comprises a drive circuit for a motor which has first and second relays to allow electric current to flow so as to drive the motor in either the forward or reverse direction. The contact of the second relay, which drives the motor in one direction, is used in such a way that the contact forms a part of an electronic circuit for the magnetic coil of the first relay. When the second relay operates, the electric circuit for the magnetic coil of the first relay is closed off. This activating device can ensure that a power window will be opened even if the automobile is submerged, and the first and second relay are switched ON at the same time.

Activating device

A highly dependable motor drive system capable of driving a motor with certainty even in a submersion accident and preventing overcurrent from flowing to the motor on the occasion of switching the direction of rotation. It is so arranged that, of a first and second relay for rotating the motor in the normal and reverse directions, respectively, in response to operation of associated switches, the first relay is selectively actuated and the second relay is de-energized. As the associated switch is operated, the energization of the coil of the second relay is maintained for a while by the function of a bypass circuit so that the actuation of the second relay is stopped only after actuation of the first relay with a transient motor stand-still time therebetween.

Motor drive system and power window system

Growing community of inventors

Utsunomiya, Japan

Tokihiko Sugiura