GB1456450A - Brake circuit for asynchronous motors - Google Patents

Brake circuit for asynchronous motors

Info

Publication number
GB1456450A
GB1456450A GB1675474A GB1675474A GB1456450A GB 1456450 A GB1456450 A GB 1456450A GB 1675474 A GB1675474 A GB 1675474A GB 1675474 A GB1675474 A GB 1675474A GB 1456450 A GB1456450 A GB 1456450A
Authority
GB
United Kingdom
Prior art keywords
switch
rectifier
windings
contacts
supply
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
GB1675474A
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.)
Gueldener H F
Original Assignee
Gueldener H F
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 Gueldener H F filed Critical Gueldener H F
Publication of GB1456450A publication Critical patent/GB1456450A/en
Expired 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
    • H02P3/06—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
    • H02P3/18—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 an ac motor
    • H02P3/24—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 an ac motor by applying dc to the motor

Abstract

1456450 Control of AC motors H-F GUELDENER 17 April 1974 [17 April 1973] 16754/74 Heading H2J An asynchronous motor 2 is driven or braked according to the position of switches 10, 11 and 12, which are simultaneously controlled by a common actuating element 1 movable between an operating and a braking position corresponding to the following circuit conditions:- (1) Switch 10 closed to energize the stator windings 3, 4, 5 from a three phase supply RST, switch 11 open and switch 12 changed over to charge a capacitor 13 through a rectifier 6 and resistor 14 from the voltage between phase R and the neutral MP. (2) Switch 10 open, switch 11 closed to connect the rectifier 6 in parallel with the stator windings 3, 4 and switch 12 changed over to discharge the capacitor 13 through resistors 14, 15, 16 and a relay coil 8, whose contacts 9 close to connect the windings 3, 4 to the supply R, MP through a rectifier 7. The windings 3, 4 thus receive two half-wave rectified currents which are phase displaced by 180 degrees and thus combine to produce a smoothed D.C. braking current, whose component produced by rectifier 6 falls to zero as the induced voltage in windings 3, 4 reduces with decreasing motor speed. Adjustable resistor 15 is set so that the coil 8 is de-energized and contacts 9 open just after the motor has stopped, the component of braking current produced by the rectifier 7 thus being maintained for a time which may be varied according to the motor characteristics and the load to be braked. The described embodiment may be modified as follows:- (1) Members 7, 9 are replaced by a thyristor (37) whose firing current is made or broken by contacts (39) controlled by a relay coil (38), Fig. 2 (not shown). (2) Members 7, 9 are replaced by a thyristor (67) having a control current generator (79) adjustable to a desired pulse width to produce a desired mains component of braking current, the supply to the generator being taken from the supply R, MP through contacts (69) controlled by a relay coil (68), Fig. 3 (not shown). Reference has been directed by the Comptroller to Specification 1,341,496.
GB1675474A 1973-04-17 1974-04-17 Brake circuit for asynchronous motors Expired GB1456450A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732319317 DE2319317A1 (en) 1973-04-17 1973-04-17 BRAKE SYSTEM FOR ASYNCHRONOUS MOTORS

Publications (1)

Publication Number Publication Date
GB1456450A true GB1456450A (en) 1976-11-24

Family

ID=5878338

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1675474A Expired GB1456450A (en) 1973-04-17 1974-04-17 Brake circuit for asynchronous motors

Country Status (4)

Country Link
CH (1) CH563685A5 (en)
DE (1) DE2319317A1 (en)
FR (1) FR2226775B3 (en)
GB (1) GB1456450A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4195255A (en) * 1977-12-05 1980-03-25 Cole-Parmer Instrument Company Electronic brake for AC motors
EP0042123A1 (en) * 1980-06-13 1981-12-23 Pt Components, Inc. Electronic motor braking system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3044238C2 (en) * 1980-11-25 1985-11-14 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Switching device for DC braking of asynchronous motors
DE3131846C2 (en) * 1981-08-12 1986-10-09 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Switching device for DC braking of an AC motor
DE3204587A1 (en) 1982-02-10 1983-08-18 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt SWITCHING DEVICE FOR DC BRAKING OF A SINGLE-PHASE AC MOTOR
DE3249877C2 (en) * 1982-02-10 1989-01-12 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt, De Circuit device for DC braking of a three-phase motor (motor having a multiple of three phases)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4195255A (en) * 1977-12-05 1980-03-25 Cole-Parmer Instrument Company Electronic brake for AC motors
EP0042123A1 (en) * 1980-06-13 1981-12-23 Pt Components, Inc. Electronic motor braking system

Also Published As

Publication number Publication date
FR2226775A1 (en) 1974-11-15
DE2319317A1 (en) 1974-10-24
FR2226775B3 (en) 1977-01-07
CH563685A5 (en) 1975-06-30

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Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed