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GB2344477B - Permanent magnet electric motors - Google Patents

Permanent magnet electric motors

Info

Publication number
GB2344477B
GB2344477B GB0003176A GB0003176A GB2344477B GB 2344477 B GB2344477 B GB 2344477B GB 0003176 A GB0003176 A GB 0003176A GB 0003176 A GB0003176 A GB 0003176A GB 2344477 B GB2344477 B GB 2344477B
Authority
GB
United Kingdom
Prior art keywords
permanent magnet
electric motors
magnet electric
motors
permanent
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 - Fee Related
Application number
GB0003176A
Other versions
GB2344477A (en
GB0003176D0 (en
Inventor
Valentin Barba
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.)
Smiths Aerospace Actuation Systems Los Angeles Inc
Original Assignee
GEC Marconi Aerospace Inc
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 US08/556,576 external-priority patent/US5847522A/en
Application filed by GEC Marconi Aerospace Inc filed Critical GEC Marconi Aerospace Inc
Publication of GB0003176D0 publication Critical patent/GB0003176D0/en
Publication of GB2344477A publication Critical patent/GB2344477A/en
Application granted granted Critical
Publication of GB2344477B publication Critical patent/GB2344477B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
    • H02P3/02—Details of stopping control
    • H02P3/04—Means for stopping or slowing by a separate brake, e.g. friction brake or eddy-current brake
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D59/00—Self-acting brakes, e.g. coming into operation at a predetermined speed
    • F16D59/02—Self-acting brakes, e.g. coming into operation at a predetermined speed spring-loaded and adapted to be released by mechanical, fluid, or electromagnetic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D63/00—Brakes not otherwise provided for; Brakes combining more than one of the types of groups F16D49/00 - F16D61/00
    • F16D63/006—Positive locking brakes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/102—Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction brakes
    • H02K7/1021—Magnetically influenced friction brakes
    • H02K7/1023—Magnetically influenced friction brakes using electromagnets
    • H02K7/1025—Magnetically influenced friction brakes using electromagnets using axial electromagnets with generally annular air gap
    • 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
    • H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
    • H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
    • H02P3/08—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing a dc motor
    • H02P3/12—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing a dc motor by short-circuit or resistive braking
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00—Type of actuator operation force
    • F16D2121/18—Electric or magnetic
    • F16D2121/20—Electric or magnetic using electromagnets
    • F16D2121/22—Electric or magnetic using electromagnets for releasing a normally applied brake
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00—Type of actuator operation force
    • F16D2121/18—Electric or magnetic
    • F16D2121/24—Electric or magnetic using motors
    • F16D2121/26—Electric or magnetic using motors for releasing a normally applied brake

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Stopping Of Electric Motors (AREA)
GB0003176A 1995-11-13 1996-10-24 Permanent magnet electric motors Expired - Fee Related GB2344477B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/556,576 US5847522A (en) 1995-11-13 1995-11-13 Locking devices and control circuitry for permanent magnet electric motors
GB9622168A GB2307118B (en) 1995-11-13 1996-10-24 Permanent magnet electric motors

Publications (3)

Publication Number Publication Date
GB0003176D0 GB0003176D0 (en) 2000-04-05
GB2344477A GB2344477A (en) 2000-06-07
GB2344477B true GB2344477B (en) 2000-07-26

Family

ID=26310280

Family Applications (2)

Application Number Title Priority Date Filing Date
GB0003176A Expired - Fee Related GB2344477B (en) 1995-11-13 1996-10-24 Permanent magnet electric motors
GB0003178A Expired - Fee Related GB2344478B (en) 1995-11-13 1996-10-24 Locking devices for magnet electric motors

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB0003178A Expired - Fee Related GB2344478B (en) 1995-11-13 1996-10-24 Locking devices for magnet electric motors

Country Status (1)

Country Link
GB (2) GB2344477B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10054528B4 (en) 2000-11-03 2006-05-04 Conti Temic Microelectronic Gmbh Circuit arrangement of a two-port electric motor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1424776A (en) * 1973-01-25 1976-02-11 Feaver J L Reversing switch
US4420716A (en) * 1979-12-29 1983-12-13 General Research Of Electronics, Inc. DC Motor control apparatus
US4896084A (en) * 1989-05-22 1990-01-23 United Technologies Automotive, Inc. Single input, single supply three-state controller

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2959695A (en) * 1958-12-31 1960-11-08 Lear Inc Magnetic motor pole piece radial brake
GB987101A (en) * 1961-07-07 1965-03-24 Globe Ind Inc Electromagnetic brake
IT1245489B (en) * 1990-07-17 1994-09-27 Black & Decker Inc PORTABLE MACHINE TOOL WITH BRAKING DEVICE AND LOCK.
US5444317A (en) * 1993-11-15 1995-08-22 Barber-Colman Company Braking mechanism for a shaded-pole motor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1424776A (en) * 1973-01-25 1976-02-11 Feaver J L Reversing switch
US4420716A (en) * 1979-12-29 1983-12-13 General Research Of Electronics, Inc. DC Motor control apparatus
US4896084A (en) * 1989-05-22 1990-01-23 United Technologies Automotive, Inc. Single input, single supply three-state controller

Also Published As

Publication number Publication date
GB2344477A (en) 2000-06-07
GB2344478B (en) 2000-07-26
GB2344478A (en) 2000-06-07
GB0003178D0 (en) 2000-04-05
GB0003176D0 (en) 2000-04-05

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20051024