Patent Number: 6,670,731

Title: Stepping motor

Abstract: A stepping motor including a rotor having a plurality of magnetic poles, one stator base arranged near the rotor, a pair of magnetic yokes fixed on the stator base and arranged to face the magnetic poles of the rotor, a pair of excitation coils for exciting the pair of magnetic yokes respectively in response to drive pulses which have phase difference, and a pair of stator magnetic polar portions integrally formed with the stator base. The stepping motor is constructed to form magnetic paths together with the number of magnetic turns of the excitation coils without increasing the size of the magnetic yokes, thereby enhancing operations and reliability.

Inventors: Kotani; Tsutomu (Tokyo, JP), Mishima; Kazunori (Tokyo, JP)

Assignee: TDK Corporation

International Classification: H02K 37/12 (20060101); H02K 1/14 (20060101); H02K 37/16 (20060101); H02K 037/16 ()

Expiration Date: 12/30/2020