FR2275051A1 - Motor with electromagnetic braking - electromagnets separate braking surfaces, removal of power allows springs to operate brakes - Google Patents

Motor with electromagnetic braking - electromagnets separate braking surfaces, removal of power allows springs to operate brakes

Info

Publication number
FR2275051A1
FR2275051A1 FR7420778A FR7420778A FR2275051A1 FR 2275051 A1 FR2275051 A1 FR 2275051A1 FR 7420778 A FR7420778 A FR 7420778A FR 7420778 A FR7420778 A FR 7420778A FR 2275051 A1 FR2275051 A1 FR 2275051A1
Authority
FR
France
Prior art keywords
motor
braking
removal
electromagnets
power
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
FR7420778A
Other languages
French (fr)
Other versions
FR2275051B1 (en
Inventor
Yasuhiro Kojima
Sadanobu Hirokawa
Akira Kusakabe
Hiroshi Kamiyuse
Takayoshi Nakamura
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.)
Kito KK
Original Assignee
Kito KK
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 Kito KK filed Critical Kito KK
Priority to FR7420778A priority Critical patent/FR2275051A1/en
Publication of FR2275051A1 publication Critical patent/FR2275051A1/en
Application granted granted Critical
Publication of FR2275051B1 publication Critical patent/FR2275051B1/fr
Granted 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)

Abstract

An electric motor has an automatic braking system, brought into operation once the power supply is switched off. The stator coils are arranged symmetrically around the central rotor which has a shorter axial length than the stator. In the remaining space and in the space away from the output shaft of the motor is an electromagnetic pair of annular poles, normally, in the power off state, held apart by a helical spring. The outermost pole is free to move axially on the motor shaft and carries a braking surface. Powering the motor energises the electromagnet pulling the braking surfaces apart. Removal of power allows the springs to bring the brake into operation.
FR7420778A 1974-06-14 1974-06-14 Motor with electromagnetic braking - electromagnets separate braking surfaces, removal of power allows springs to operate brakes Granted FR2275051A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7420778A FR2275051A1 (en) 1974-06-14 1974-06-14 Motor with electromagnetic braking - electromagnets separate braking surfaces, removal of power allows springs to operate brakes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7420778A FR2275051A1 (en) 1974-06-14 1974-06-14 Motor with electromagnetic braking - electromagnets separate braking surfaces, removal of power allows springs to operate brakes

Publications (2)

Publication Number Publication Date
FR2275051A1 true FR2275051A1 (en) 1976-01-09
FR2275051B1 FR2275051B1 (en) 1979-07-27

Family

ID=9140094

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7420778A Granted FR2275051A1 (en) 1974-06-14 1974-06-14 Motor with electromagnetic braking - electromagnets separate braking surfaces, removal of power allows springs to operate brakes

Country Status (1)

Country Link
FR (1) FR2275051A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2724504A1 (en) * 1994-07-11 1996-03-15 Plumer Sa Motor-brake combination with squirrel-cage rotor and moving plate
FR2724505A1 (en) * 1994-07-11 1996-03-15 Plumer Sa Motor-brake combination with squirrel-cage rotor and moving plate
EP0742633A2 (en) * 1995-05-10 1996-11-13 LAFERT S.r.l. Self-braking electric motor
FR2879369A1 (en) * 2004-12-10 2006-06-16 Somfy Sas Motor operated brake assembly for e.g. door, has brake comprising two units in which one unit is rotatively integrated with cases and other unit is rotatively integrated with output shaft of motor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2724504A1 (en) * 1994-07-11 1996-03-15 Plumer Sa Motor-brake combination with squirrel-cage rotor and moving plate
FR2724505A1 (en) * 1994-07-11 1996-03-15 Plumer Sa Motor-brake combination with squirrel-cage rotor and moving plate
EP0742633A2 (en) * 1995-05-10 1996-11-13 LAFERT S.r.l. Self-braking electric motor
EP0742633A3 (en) * 1995-05-10 1999-04-21 LAFERT S.r.l. Self-braking electric motor
FR2879369A1 (en) * 2004-12-10 2006-06-16 Somfy Sas Motor operated brake assembly for e.g. door, has brake comprising two units in which one unit is rotatively integrated with cases and other unit is rotatively integrated with output shaft of motor

Also Published As

Publication number Publication date
FR2275051B1 (en) 1979-07-27

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