JPS5444708A - Dc brushless motor - Google Patents

Dc brushless motor

Info

Publication number
JPS5444708A
JPS5444708A JP11129977A JP11129977A JPS5444708A JP S5444708 A JPS5444708 A JP S5444708A JP 11129977 A JP11129977 A JP 11129977A JP 11129977 A JP11129977 A JP 11129977A JP S5444708 A JPS5444708 A JP S5444708A
Authority
JP
Japan
Prior art keywords
polygonal
magnets
brushless motor
motor
flux
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP11129977A
Other languages
Japanese (ja)
Inventor
Hirohisa Ishii
Masami Nikukura
Toshihiko Okamura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP11129977A priority Critical patent/JPS5444708A/en
Publication of JPS5444708A publication Critical patent/JPS5444708A/en
Pending legal-status Critical Current

Links

Landscapes

  • Brushless Motors (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

PURPOSE:To permit effective use the flux for improving the efficiency of the motor by providing an outside rotor of a polygonal sectional profile, in which planar permanent magnets are each secured by bonding to each inner side of a polygonal wall member such that every other N and S poles occur alternately. CONSTITUTION:A rotor yoke 1 of an outside rotor type brushless motor has a cup-shaped form constituted by a wall portion 1a having a polygonal sectional profile and a polygonal bottom 1b, and planar permanent magnets 7 are each secured by bonding to each planner inner side of the wall portion 1a such that every other N and S poles occur alternately. Thus, a majority of the flux produced by the magnets can be used for producing motor torque to improve the efficiency. In addition, from the structure of the gap between the magnets and the stator the flux density in the radial direction is substantially trapezoidal. Since in this case the current-carrying portion of the stator subtends, for instance, an electric angle of 120 degrees with a three-phase four-pole brushless motor, the flat portions of the trapezoidal wave can be used for torque generation to reduce torque ripples.
JP11129977A 1977-09-14 1977-09-14 Dc brushless motor Pending JPS5444708A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11129977A JPS5444708A (en) 1977-09-14 1977-09-14 Dc brushless motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11129977A JPS5444708A (en) 1977-09-14 1977-09-14 Dc brushless motor

Publications (1)

Publication Number Publication Date
JPS5444708A true JPS5444708A (en) 1979-04-09

Family

ID=14557692

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11129977A Pending JPS5444708A (en) 1977-09-14 1977-09-14 Dc brushless motor

Country Status (1)

Country Link
JP (1) JPS5444708A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5734760A (en) * 1980-08-09 1982-02-25 Tokyo Parts Kogyo Kk Commutatorless motor
DE3125694A1 (en) * 1981-06-30 1983-01-13 Papst-Motoren GmbH & Co KG, 7742 St Georgen COLLECTORLESS DC MOTOR
DE3425805A1 (en) * 1984-07-13 1986-01-23 Teldix Gmbh, 6900 Heidelberg DC motor of disc-rotor construction, without a commutator
US7808141B2 (en) 2007-03-30 2010-10-05 Minebea Motor Manufacturing Corporation Stepping motor and rotor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5734760A (en) * 1980-08-09 1982-02-25 Tokyo Parts Kogyo Kk Commutatorless motor
DE3125694A1 (en) * 1981-06-30 1983-01-13 Papst-Motoren GmbH & Co KG, 7742 St Georgen COLLECTORLESS DC MOTOR
JPS5839260A (en) * 1981-06-30 1983-03-07 パプスト−モト−レン・ゲゼルシヤフト・ミト・ベシユレンクテル・ハフツング・ウント・コンパニ−・コマンデイトゲゼル・シヤフト Brushless dc motor
JPH0324147B2 (en) * 1981-06-30 1991-04-02 Papusuto Motoren Gmbh Unto Co Kg
DE3425805A1 (en) * 1984-07-13 1986-01-23 Teldix Gmbh, 6900 Heidelberg DC motor of disc-rotor construction, without a commutator
US7808141B2 (en) 2007-03-30 2010-10-05 Minebea Motor Manufacturing Corporation Stepping motor and rotor

Similar Documents

Publication Publication Date Title
JPS5444707A (en) Dc brushless motor
GB1485305A (en) Dynamoelectric machines
KR850700188A (en) DC motor
CA2097194A1 (en) Polyphase switched reluctance motor
ATE41839T1 (en) ELECTRIC MOTOR.
JPS5990279U (en) Permanent magnet rotor motor
ES2006074A6 (en) Alternating current generator having a rotor with claw-type poles.
ES528846A0 (en) A SINGLE-WIND SYNCHRONOUS ELECTRIC MOTOR, DIVIDED POLE AND SINGLE PHASE
ES8507737A1 (en) Electronically commutated D.C. motor.
ES337345A1 (en) An Electric Machine having Permanent Magnets Mounted in the Rotor between its Pole Segments
JPS5444708A (en) Dc brushless motor
GB642477A (en) Improvements relating to self-starting synchronous motors
EP0365689A1 (en) Synchronous motor
GB1389983A (en) Electric synchronous motor
US3293467A (en) Single-phase electric motors
GB1253167A (en)
GB1263864A (en) A synchronous motor
JPS6111542B2 (en)
JPS5571163A (en) Rotary electric machine
GB2014800A (en) Synchronous motor
US3544824A (en) Single-phase miniature salient pole asynchronous motor
DE3879486D1 (en) SELF-STARTING SINGLE-PHASE SYNCHRONOUS MOTOR.
KR20030093173A (en) Rotor
GB1416430A (en) Electric stepping motors
SU1483558A1 (en) Synchronous tacho generator