Minebea Company, Limited

Takeshi Matsuno

Shigeki Miyaji

Kiyohisa Nara

Yukihiro Terada

Masashi Ohba

Yoshiya Yamamura

Hiroaki Itahashi

A claw pole type motor is provided and includes: a rotor which includes a magnet and a rotation shaft around which the magnet is attached; and a stator which includes a bobbin, a winding wound around the bobbin, and a yoke which includes a plurality of pole teeth disposed to oppose the magnet and which is located outside the winding, wherein a vibration suppressing means is provided which makes contact with a distal end portion of the pole tooth and by which the pole tooth is pressure-supported on an inner circumferential surface of the bobbin, whereby the pole tooth is suppressed from vibrating.

Claw pole type motor

A stepping motor includes a rotor assembly and a stator assembly including two stator units axially coupled to each other. The two stator units each include a pair of yokes which each include a base portion and a plurality of pole teeth extending from the base portion and which are disposed such that each of the pole teeth of one yoke and each of the pole teeth of the other yoke are arranged alternately in the circumferential direction. The pole teeth are shaped symmetric and each include a pair of slant sides inclined so as to become closer to each other with an increase of distance from the base portion, and the slant sides of adjacent pole teeth are located close to each other wherein a magnetic pole gap between the adjacent pole teeth pole teeth is about 0.2 times as large as the thickness of the pole teeth.

Stepping motor

Growing community of inventors

Hamamatsu, Japan

Takeshi Matsuno