JPS5740357A - Brushless motor - Google Patents

Brushless motor

Info

Publication number
JPS5740357A
JPS5740357A JP11367880A JP11367880A JPS5740357A JP S5740357 A JPS5740357 A JP S5740357A JP 11367880 A JP11367880 A JP 11367880A JP 11367880 A JP11367880 A JP 11367880A JP S5740357 A JPS5740357 A JP S5740357A
Authority
JP
Japan
Prior art keywords
magnetic poles
main
speed sensing
poles
magnetic pole
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
JP11367880A
Other languages
Japanese (ja)
Inventor
Shiyouji Andou
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 JP11367880A priority Critical patent/JPS5740357A/en
Publication of JPS5740357A publication Critical patent/JPS5740357A/en
Pending legal-status Critical Current

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
    • H02K29/14—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with speed sensing devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Brushless Motors (AREA)

Abstract

PURPOSE:To reduce the influence of a speed detecting magnetic pole exerting upon a main magnetic pole magnetic field by a method wherein the process of magnetizing motor magnet main poles is performed separately from the process of magnetizing rotor speed detecting magnetic poles fragmented rotation-wise. CONSTITUTION:Each 45 degree segment of a main magnetic pole 16 is magnetized so that its polarity may be reverse to the neighboring segments. The circumference of the main magnetic poles 16 is composed of speed sensing magnetic poles 17 whose magnetism is relatively weak. A surface opposing speed sensing magnetic poles 17 of the magnet 1 is provided with a printed substrate 14 whereupon speed sensing conductive patterns 15 are formed. this reduces torque ripples as the magnetism of the speed sensing magnetic poles 17 work effectively only in the NS border zones of the main magnetic poles 16.
JP11367880A 1980-08-19 1980-08-19 Brushless motor Pending JPS5740357A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11367880A JPS5740357A (en) 1980-08-19 1980-08-19 Brushless motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11367880A JPS5740357A (en) 1980-08-19 1980-08-19 Brushless motor

Publications (1)

Publication Number Publication Date
JPS5740357A true JPS5740357A (en) 1982-03-05

Family

ID=14618385

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11367880A Pending JPS5740357A (en) 1980-08-19 1980-08-19 Brushless motor

Country Status (1)

Country Link
JP (1) JPS5740357A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58143900U (en) * 1982-03-24 1983-09-28 神崎製紙株式会社 Roll polishing device
US4631457A (en) * 1983-11-01 1986-12-23 Oki Electric Industry Co., Ltd. Method of leading a moving body driven by a direct current brushless motor to a starting position
US4748387A (en) * 1986-07-25 1988-05-31 Oki Electric Industry Co., Ltd. DC brushless motor driving method and apparatus for accurately controlling starting position of rotor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58143900U (en) * 1982-03-24 1983-09-28 神崎製紙株式会社 Roll polishing device
JPS632284Y2 (en) * 1982-03-24 1988-01-20
US4631457A (en) * 1983-11-01 1986-12-23 Oki Electric Industry Co., Ltd. Method of leading a moving body driven by a direct current brushless motor to a starting position
US4748387A (en) * 1986-07-25 1988-05-31 Oki Electric Industry Co., Ltd. DC brushless motor driving method and apparatus for accurately controlling starting position of rotor

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