Title:
STEPPING MOTOR
Document Type and Number:
WIPO Patent Application WO/2018/201854
Kind Code:
A1
Abstract:
Provided is a stepping motor, comprising a stator core (1), a rotor core (4), and a magnetic steel (6). The stator core (1) is evenly provided with a plurality of stator main poles (2) in a circumferential direction, and an inner end of each of the stator main poles (2) has Ns stator teeth (3). The rotor core (4) is evenly provided with Nr rotor teeth (5) in a circumferential direction, wherein 0.60 *Dso ≤ Dsi, and Dro ≤ 0.75*Dso; 0.85*Br*Nr≤Sm = π*(Dmo2-Dmi2)/4 ≤ 2.0*Br*Nr; Dri ≤ Dmi; Dso is the outer diameter of the stator, Dsi is the inner diameter of the stator, Dro is the outer diameter of the rotor, Br is the width of the rotor tooth, Nr is the number of the rotor teeth, Sm is the magnetic area of the magnetic steel, Dmo is the outer diameter of the magnetic steel, Dmi is the inner diameter of the magnetic steel, and Dri is the inner diameter of the rotor. Compared with the prior art, the technical solution has the advantages of reducing harmonics of back electromotive force and reducing vibration noise of the motor.
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Inventors:
PENG GUANGMING (CN)
JIN WANBING (CN)
ZHANG XICHEN (CN)
JIN WANBING (CN)
ZHANG XICHEN (CN)
Application Number:
PCT/CN2018/082326
Publication Date:
November 08, 2018
Filing Date:
April 09, 2018
Export Citation:
Assignee:
SHANGHAI MOONS ELEC CO LTD (CN)
International Classes:
H02K37/10
Foreign References:
| CN207053359U | 2018-02-27 | |||
| CN203339926U | 2013-12-11 | |||
| CN202586676U | 2012-12-05 | |||
| CN104598688A | 2015-05-06 | |||
| CN202334240U | 2012-07-11 | |||
| US20090108713A1 | 2009-04-30 |
Attorney, Agent or Firm:
SHANGHAI KESHENG INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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