GB1436716A - Brushless dc motors - Google Patents

Brushless dc motors

Info

Publication number
GB1436716A
GB1436716A GB2470673A GB2470673A GB1436716A GB 1436716 A GB1436716 A GB 1436716A GB 2470673 A GB2470673 A GB 2470673A GB 2470673 A GB2470673 A GB 2470673A GB 1436716 A GB1436716 A GB 1436716A
Authority
GB
United Kingdom
Prior art keywords
stator
rotor
torque
ferromagnetic
motors
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.)
Expired
Application number
GB2470673A
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.)
Ebm Papst St Georgen GmbH and Co KG
Original Assignee
Papst Motoren GmbH and Co KG
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
Priority claimed from DE2225442A external-priority patent/DE2225442C3/en
Priority claimed from DE2243923A external-priority patent/DE2243923A1/en
Priority claimed from DE2252727A external-priority patent/DE2252727A1/en
Application filed by Papst Motoren GmbH and Co KG filed Critical Papst Motoren GmbH and Co KG
Publication of GB1436716A publication Critical patent/GB1436716A/en
Expired 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
    • H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
    • H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
    • H02P6/14—Electronic commutators
    • H02P6/16—Circuit arrangements for detecting position
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
    • H02P6/08—Arrangements for controlling the speed or torque of a single motor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
    • H02P6/10—Arrangements for controlling torque ripple, e.g. providing reduced torque ripple
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P2209/00—Indexing scheme relating to controlling arrangements characterised by the waveform of the supplied voltage or current
    • H02P2209/07—Trapezoidal waveform

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

1436716 Electric motors PAPST-MOTOREN KG 23 May 1973 [25 May 1972 7 Sept 1972 27 Oct 1972] 24706/73 Heading H2A In a brushless D.C. motor comprising a permanently magnetised rotor 26 and a substantially flat air gap in which is disposed at least one flat stator coil which interacts with the rotor to produce an intermittent electromagnetic torque, the stator is provided with at least one ferromagnetic member which co-acts with the rotor to produce an auxiliary torque which supplements the gaps in the electromagnetic torque. The motors disclosed are axial air gap motors with axially magnetised rotor magnets 18, 19 disposed on opposite sides of two stator coils 11, 12, the current through which is commutated in dependence on the output of Hall plate 42. The ferromagnetic member in the stator shown comprises an array of ferromagnetic pins 45, 45<SP>1</SP>, 45<SP>11</SP> mounted on insulating stator base plate 10 and so formed that the reluctance torque produced by the interaction of the pins and rotor magnets is mirror symmetrical with the electromagnetic torque, so that the resultant motor torque is substantially uniform. A variety of forms of the ferromagnetic stator member, in addition to the form shown, are disclosed.
GB2470673A 1972-05-25 1973-05-23 Brushless dc motors Expired GB1436716A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE2225442A DE2225442C3 (en) 1972-05-25 1972-05-25 Brushless DC motor
DE2243923A DE2243923A1 (en) 1972-05-25 1972-09-07 COLLECTORLESS DC MOTOR
DE2252727A DE2252727A1 (en) 1972-05-25 1972-10-27 COLLECTORLESS DC MOTOR

Publications (1)

Publication Number Publication Date
GB1436716A true GB1436716A (en) 1976-05-26

Family

ID=27184435

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2470673A Expired GB1436716A (en) 1972-05-25 1973-05-23 Brushless dc motors

Country Status (1)

Country Link
GB (1) GB1436716A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4506218A (en) * 1981-01-12 1985-03-19 Rotron Incorporated Condition sensing arrangement for ac machines
US4508998A (en) * 1981-02-09 1985-04-02 David H. Rush Brushless disc-type DC motor or generator
US5369323A (en) * 1991-10-28 1994-11-29 Slonix Engineering Composite magnet stepper motor
US5440185A (en) * 1991-10-28 1995-08-08 Allwine, Jr.; Elmer C. Composite magnet brushless DC motor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4506218A (en) * 1981-01-12 1985-03-19 Rotron Incorporated Condition sensing arrangement for ac machines
US4508998A (en) * 1981-02-09 1985-04-02 David H. Rush Brushless disc-type DC motor or generator
US5369323A (en) * 1991-10-28 1994-11-29 Slonix Engineering Composite magnet stepper motor
US5440185A (en) * 1991-10-28 1995-08-08 Allwine, Jr.; Elmer C. Composite magnet brushless DC motor

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years

Effective date: 19930522