Shizuoka University

Denso Corporation

So-ken Corporation

Junichi Asama

Koji Ito

Masanori Yasuda

Jun Yamaoka

Masao Tokunaga

Shinji Makita

Etsuro Yoshino

Takaaki Oiwa

In an electric motor, a magnetic bearing generates an electromagnetic force between multiple permanent magnets and a coil and rotatably supports an other side of a rotation shaft in an axis line direction. The rotation shaft is configured to be capable of being inclined with a rotation center line using a bearing side of the rotation shaft as a fulcrum. An electronic control device controls a current that flows to the coil such that an axis line of the rotation shaft approaches the rotation center line due to a supporting force which is the electromagnetic force between the multiple permanent magnets and the coil. Accordingly, the rotation shaft is rotatably supported to be freely rotatable by a magnetic bearing and the bearing.

Electric motor, control device, and motor control system

An inchworm actuator which can move a movable body relative to a stationary body while selectively giving priority to displacement speed or displacement resolution in accordance with the conditions of use is provided. An inchworm actuatorincludes a movable bodysupported between first and second guidesandwhich are made of a magnetic material and which extend parallel to each other. In the movable body, a voice coil motoris supported by first and second support legsandthrough toggle mechanismsand. The first and second support legsandare made of a magnetic material and have magnetic field-forming coilsand. The toggle mechanismsandconvert the amount of displacement input from the voice coil motorusing a reducing conversion ratio corresponding to the amount of the displacement and transmit a resultant displacement to the first and second support legsand. The first and second guidesandare connected together by upper and lower framesandwhich are made of a magnetic material and which have permanent magnetsand

Inchworm actuator

Growing community of inventors

Hamamatsu, Japan

Junichi Asama