Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Electric Corporation

Akira Watarai

Akira Hashimoto

Yuji Nakahara

Yasuki Kimura

Shoichiro Nishitani

Michio Nakamoto

Masaya Inoue

Kouki Naka

Satoshi Yamashiro

Kazumasa Itou

An armature of a linear motor includes a plurality of first magnetic teeth and a plurality of second magnetic teeth, each of the magnetic teeth being formed by laminating multiple tooth elements made of electromagnetic steel sheets. The first magnetic teeth are arranged side by side in a linear form while the second magnetic teeth are located one each between the successive first magnetic teeth. Each of the second magnetic teeth interconnects the two adjacent first magnetic teeth located on both sides.

Armature of linear motor

In a linear motor according to this invention, the field permanent magnetsare arranged at an equal pitch around a field iron coreso that the poles are alternately changed. Also, an armatureon the needle side is arranged oppositely via a magnetic gap on a magnetic pole face of the field permanent magnets. The armatureconsists of an armature core forming the teeth and a yoke portion by punching an electromagnetic steel plate like the comb teeth, coil being wound around a plurality of teethandfor this armature core to form the armature windingsand. The teethwithout coil winding is disposed between teeth with coil windingandand between teeth with coil windingand. The teethandwith coil winding and the teethwithout coil winding are alternately arranged.

Linear motor

A linear motor comprises a stator including a stator yoke and a plurality of permanent magnets arranged side by side on the stator yoke along a motor running direction in alternately reversed directions to produce alternating polarities, and a moving part including a plurality of magnetic teeth arranged along the motor running direction and coils wound around the individual magnetic teeth. Cutouts formed in end surfaces of yoke portions of the individual magnetic teeth opposite to their side facing the stator line up to form a groove-shaped channel running through the yoke portions of the successive magnetic teeth, and the multiple magnetic teeth are joined together into a single structure by fitting a connecting bar in the groove-shaped channel.

Growing community of inventors

Tokyo, Japan

Akira Watarai