• Patent Title: Rotating electric machine with various ratios for permanent magnets and holes, rotor salient and magnetic poles, rotor laminations, air gaps and stator tooth thickness
  • Application No.: US14101391
    Application Date: 2013-12-10
  • Publication No.: US10734853B2
    Publication Date: 2020-08-04
  • Inventor: Makoto TaniguchiHiroki Tomizawa
  • Applicant: DENSO CORPORATION
  • Applicant Address: JP Kariya
  • Assignee: DENSO CORPORATION
  • Current Assignee: DENSO CORPORATION
  • Current Assignee Address: JP Kariya
  • Agency: Nixon & Vanderhye PC
  • Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@1368912f com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@6a2b2b77
  • Main IPC: H02K1/27
  • IPC: H02K1/27 H02K29/03
Rotating electric machine with various ratios for permanent magnets and holes, rotor salient and magnetic poles, rotor laminations, air gaps and stator tooth thickness
Abstract:
A rotating electric machine is equipped with a consequent-pole type rotor that includes a magnetic pole having a permanent magnet buried therein and a soft magnetic material pole that interposes two magnetic poles. The thickness of the permanent magnet and a circumferential width of the soft magnetic material pole have a relationship that prevents a spread of magnetic flux distribution in the circumferential direction within a gap between the soft magnetic material pole and a stator. As a result, a magnetic flux density difference in the circumferential direction is prevented, which enables a reduction of cogging torque based on an effective reduction of low-frequency space order components that originate from components other than a main component.
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