KR900005756B1 - Rotating electric motor with reduced cogging torque - Google Patents

Rotating electric motor with reduced cogging torque

Info

Publication number
KR900005756B1
KR900005756B1 KR8505550A KR850005550A KR900005756B1 KR 900005756 B1 KR900005756 B1 KR 900005756B1 KR 8505550 A KR8505550 A KR 8505550A KR 850005550 A KR850005550 A KR 850005550A KR 900005756 B1 KR900005756 B1 KR 900005756B1
Authority
KR
South Korea
Prior art keywords
teeth
core
electric motor
rotating electric
permanent magnet
Prior art date
Application number
KR8505550A
Other languages
Korean (ko)
Other versions
KR860002169A (en
Inventor
Makodo Kodo
Original Assignee
Matsushita Electric Ind Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Ind Co Ltd filed Critical Matsushita Electric Ind Co Ltd
Publication of KR860002169A publication Critical patent/KR860002169A/en
Application granted granted Critical
Publication of KR900005756B1 publication Critical patent/KR900005756B1/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings
    • H02K1/165—Shape, form or location of the slots

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Brushless Motors (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

In a brushless DC motor a cylindrical permanent magnet (23) rotating with the magnetic rotor (22) on its shaft (21) has four poles alternately north- and south-seeking at 90 deg. intervals. The shaft is supported by an armature core (24) which has six times as many teeth (26) formed between adjacent winding slots (25) and facing the poles of the permanent magnet (23). The teeth are grouped in three sets of eight between dummy slot portions of the core which constitute 'long teeth' having a greater than average effective pitch. Three-phase overlapping windings are wound in the slots which have different phases w.r.t. the dummy slot portions, so that fourier series harmonics of the shape of the core show small variation.
KR8505550A 1984-08-01 1985-08-01 Rotating electric motor with reduced cogging torque KR900005756B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP59161866A JPH0681468B2 (en) 1984-08-01 1984-08-01 Electric motor
JP59-161866 1984-08-01

Publications (2)

Publication Number Publication Date
KR860002169A KR860002169A (en) 1986-03-26
KR900005756B1 true KR900005756B1 (en) 1990-08-09

Family

ID=15743447

Family Applications (1)

Application Number Title Priority Date Filing Date
KR8505550A KR900005756B1 (en) 1984-08-01 1985-08-01 Rotating electric motor with reduced cogging torque

Country Status (2)

Country Link
JP (1) JPH0681468B2 (en)
KR (1) KR900005756B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU8722091A (en) * 1990-10-09 1992-04-28 Stridsberg Innovation Ab An electric power train for vehicles
JP4936117B2 (en) * 2006-12-12 2012-05-23 日本電産株式会社 motor
CN104300700A (en) * 2013-12-19 2015-01-21 杨仕元 Novel three-phase AC motor

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56148165A (en) * 1980-04-17 1981-11-17 Hitachi Ltd Brushless motor
JPS5842707A (en) * 1981-09-07 1983-03-12 Kawasaki Steel Corp Construction for refractory lining of blast furnace

Also Published As

Publication number Publication date
JPS6142259A (en) 1986-02-28
JPH0681468B2 (en) 1994-10-12
KR860002169A (en) 1986-03-26

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Legal Events

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A201 Request for examination
E902 Notification of reason for refusal
G160 Decision to publish patent application
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 19980805

Year of fee payment: 9

LAPS Lapse due to unpaid annual fee