GB2011732A - Squirrel-cage motor with a friction brake - Google Patents

Squirrel-cage motor with a friction brake

Info

Publication number
GB2011732A
GB2011732A GB7844999A GB7844999A GB2011732A GB 2011732 A GB2011732 A GB 2011732A GB 7844999 A GB7844999 A GB 7844999A GB 7844999 A GB7844999 A GB 7844999A GB 2011732 A GB2011732 A GB 2011732A
Authority
GB
United Kingdom
Prior art keywords
rotor
shoe
squirrel
brake
current
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.)
Granted
Application number
GB7844999A
Other versions
GB2011732B (en
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.)
G Bauknecht GmbH
Original Assignee
G Bauknecht GmbH
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 G Bauknecht GmbH filed Critical G Bauknecht GmbH
Publication of GB2011732A publication Critical patent/GB2011732A/en
Application granted granted Critical
Publication of GB2011732B publication Critical patent/GB2011732B/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H02K7/1026—Magnetically influenced friction brakes using stray fields
    • H02K7/1028—Magnetically influenced friction brakes using stray fields axially attracting the brake armature in the frontal area of the magnetic core

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Braking Arrangements (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Harvester Elements (AREA)

Abstract

A squirrel-cage motor is provided with a brake which operates when the current is switched off, to brake the rotor. The stator 11 has a braking surface 29. The rotor 13 has a brake shoe 31 which is urged by a spring 44 against the braking surface when the current is switched off, and is drawn magnetically towards the rotor when the current is on. The shoe 31 rotates with the rotor 13 due to engagement of a lug 33 in a recess 34 in the rotor. The shoe is made up of two plates 36, 37 each in the form of a continuous circular channel, and which are fixed together, back-to-back, to provide two axially-spaced hubs 39, 40 journalling the shoe on the rotor shaft 30. <IMAGE>
GB7844999A 1977-11-19 1978-11-17 Squirrel cage motor with a friction brake Expired GB2011732B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2751841A DE2751841C3 (en) 1977-11-19 1977-11-19 Squirrel cage motor with friction brake

Publications (2)

Publication Number Publication Date
GB2011732A true GB2011732A (en) 1979-07-11
GB2011732B GB2011732B (en) 1982-08-18

Family

ID=6024181

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7844999A Expired GB2011732B (en) 1977-11-19 1978-11-17 Squirrel cage motor with a friction brake

Country Status (4)

Country Link
DE (1) DE2751841C3 (en)
FR (1) FR2409629A1 (en)
GB (1) GB2011732B (en)
IT (1) IT1100496B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5293731A (en) * 1991-07-03 1994-03-15 Black & Decker Inc. Lawn mower

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RO76616A2 (en) * 1980-09-30 1983-02-01 Institutul De Cercetare Stiintifica Si Inginerie Tehnologica Pentru Industria Electrotehnica,Ro MOTOR-Brakes
US4477743A (en) * 1982-06-03 1984-10-16 Institutul De Cercetare Stiintifica Si Inginerie Technologica Pentru Industria Electrotehnica Brake-motor
AT378867B (en) * 1983-08-31 1985-10-10 Austria Antriebstech DEVICE FOR BRAKING ELECTRIC MOTORS
DE3407731A1 (en) * 1984-03-02 1985-09-05 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Electric motor with an automatically acting brake
AT395361B (en) * 1988-09-21 1992-12-10 Austria Antriebstech DEVICE FOR BRAKING ELECTRIC MOTORS WITH SHORT-TERM RUNNERS

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR823801A (en) * 1936-07-01 1938-01-27 Sachsenwerk Licht & Kraft Ag Three-phase squirrel cage motor with holding brake
NL66529C (en) * 1945-09-17
DE844932C (en) * 1948-10-02 1952-07-28 Demag Zug Gmbh Sliding armature motor with brake lock
FR1084960A (en) * 1950-03-10 1955-01-26 Demag Zug Gmbh Motor with axially actuated brake
DE1018138B (en) * 1953-12-15 1957-10-24 Warner Electric Brake & Clutch Electric motor with an electromagnetically excited friction device built into the motor housing
FR1123892A (en) * 1955-03-23 1956-10-01 Speed reduction device for sewing machine motor and motor comprising this reducer
US3032667A (en) * 1958-04-03 1962-05-01 Manning Maxwell & Moore Inc Motor brake
DE1276800B (en) * 1963-05-30 1968-09-05 Licentia Gmbh Single-phase AC motor with electromagnetic braking device
DE1513839A1 (en) * 1966-03-23 1970-02-19 Tornado Elektromotoren Fabrik Electromagnetically operated friction brake for short-circuit armature motors
RO54736A2 (en) * 1969-04-18 1973-05-17
DE2225004C2 (en) * 1972-05-23 1974-08-15 Siemens Ag, 1000 Berlin Und 8000 Muenchen Braking device for drive motors
DE2456091A1 (en) * 1974-11-27 1976-08-12 Standard Elektrik Lorenz Ag Induction motor with sprung coaxial brake disc - has friction material coated end face of rotor and needing no brake excitation winding

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5293731A (en) * 1991-07-03 1994-03-15 Black & Decker Inc. Lawn mower

Also Published As

Publication number Publication date
IT7829912A0 (en) 1978-11-17
DE2751841A1 (en) 1979-05-23
FR2409629B1 (en) 1983-07-29
GB2011732B (en) 1982-08-18
FR2409629A1 (en) 1979-06-15
DE2751841B2 (en) 1980-10-30
IT1100496B (en) 1985-09-28
DE2751841C3 (en) 1981-10-01

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Legal Events

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