Research on high speed slotless permanent magnet synchronous motor with a novel structure

Bao Quan Kou, Hai Chuan Cao, Xiao Chen Zhang

Research output: Journal PublicationArticlepeer-review

5 Citations (Scopus)


A high-speed slotless permanent magnet synchronous motor with a novel structure was proposed for problem that inductance in high-speed slotless motor is generally small. A novel slotless structure with integrated inductance which is composed of two parts that a novel slotless core and the back around winding was applied in stator and it could significantly increase leakage inductance of windings. The double layer Halbach array was applied in rotor to reduce the distortion of sinusoidal waveform of air gap flux density. Stator structure with integrated inductor was introduced and mechanism of the increase of the leakage inductance was analyzed. The analytical method of additional leakage inductance was obtained and the relation between additional leakage inductance and the measure of stator structure was analyzed. Structure and characteristics of double layer Halbach array was introduced. The characteristics of this novel motor and normal slotless motor were compared to verify advantage of increased leakage inductance. A prototype is manufactured and the effectivity of this novel motor was proved by experiment.

Original languageEnglish
Pages (from-to)77-86
Number of pages10
JournalDianji yu Kongzhi Xuebao/Electric Machines and Control
Issue number6
Publication statusPublished - 1 Jun 2016
Externally publishedYes


  • Back around winding
  • Double layer Halbach
  • High speed motor
  • Integrated inductance
  • Slotless

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Energy Engineering and Power Technology
  • Computer Science Applications
  • Electrical and Electronic Engineering


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