GB1115658A - Arrangement for controlling three phase a.c. asynchronous motors - Google Patents

Arrangement for controlling three phase a.c. asynchronous motors

Info

Publication number
GB1115658A
GB1115658A GB4697465A GB4697465A GB1115658A GB 1115658 A GB1115658 A GB 1115658A GB 4697465 A GB4697465 A GB 4697465A GB 4697465 A GB4697465 A GB 4697465A GB 1115658 A GB1115658 A GB 1115658A
Authority
GB
United Kingdom
Prior art keywords
motor
rectifiers
speed
supplied
braking
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
GB4697465A
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of GB1115658A publication Critical patent/GB1115658A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00—Control systems of elevators in general
    • B66B1/24—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
    • B66B1/28—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Elevator Control (AREA)
  • Control Of Stepping Motors (AREA)
  • Control Of Multiple Motors (AREA)

Abstract

1,115,658. Control of A.C. motors. INTERNATIONAL STANDARD ELECTRIC CORPORATION. 5 Nov., 1965 [5 Nov., 1964], No. 46974/65. Heading H2J. [Also in Division G3] A squirrel-cage induction motor 1 has a fourpole A.C. stator winding supplied through silicon-controlled rectifiers 2a-2c shunted by diodes 3a-3c, the triggering of the controlled rectifiers being phase-regulated in accordance with the deviation of the motor speed from a set value. A sixteen-pole stator winding is supplied with D.C. from transformer through controlled rectifiers 5a, 5b and diodes 6a, 6b, for braking. Trigger pulses are supplied to the rectifiers 5a, 56, from control unit 8, which, like the control unit 4, compares a reference voltage with the output of tachometer generator 9. If the speed of the motor is excessive, controlled rectifiers 2a-2c are blocked whilst the rectifiers 5a, 5b are triggered for braking. The motor may drive a lift, a deceleration programme being nitiated by closure of a contact in the lift shaft whereby a voltage varying with time is added to the tachometer voltage. This provides a steady reduction of speed. In another arrangement, the starting operation of the lift is time-controlled in a similar manner, the change-over between the acceleration and retardation programmes being effected smoothly by a diode selector circuit. The rotor is provided with high-resistance rods which are insulated to prevent transverse current between adjacent rods. This allows the motor to have a smooth, non-peaking, speed-torque characteristic for the braking operation.
GB4697465A 1964-11-05 1965-11-05 Arrangement for controlling three phase a.c. asynchronous motors Expired GB1115658A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEST022907 1964-11-05

Publications (1)

Publication Number Publication Date
GB1115658A true GB1115658A (en) 1968-05-29

Family

ID=7459563

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4697465A Expired GB1115658A (en) 1964-11-05 1965-11-05 Arrangement for controlling three phase a.c. asynchronous motors

Country Status (7)

Country Link
AT (1) AT265444B (en)
BE (1) BE671863A (en)
CH (1) CH463605A (en)
DE (1) DE1488397B2 (en)
GB (1) GB1115658A (en)
NL (1) NL6514433A (en)
SE (1) SE324048B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2156173A (en) * 1984-03-19 1985-10-02 Elevator Gmbh Procedure and means for braking an escalator
GB2159352A (en) * 1984-05-24 1985-11-27 Elevator Gmbh Arrangement for braking a motor having a short-circuited rotor

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2293391A1 (en) * 1974-12-04 1976-07-02 Maschf Augsburg Nuernberg Ag Electric control of asynchronous lift motor - is obtained by controlling currents in control and brake windings
US4299308A (en) * 1979-12-27 1981-11-10 Otis Elevator Company Position controlled elevator door motion
DE3443024A1 (en) * 1984-11-26 1986-06-19 Hans Dipl.-Ing. 8263 Burghausen Kallas Electric motor
DE3744279A1 (en) * 1987-12-25 1989-07-13 Schroecker Rainer BRAKE CIRCUIT FOR MACHINE TOOLS EQUIPPED WITH SEVERAL AC MOTORS, IN PARTICULAR FAST-SPEED AC MOTORS

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2156173A (en) * 1984-03-19 1985-10-02 Elevator Gmbh Procedure and means for braking an escalator
GB2159352A (en) * 1984-05-24 1985-11-27 Elevator Gmbh Arrangement for braking a motor having a short-circuited rotor

Also Published As

Publication number Publication date
DE1488397B2 (en) 1971-08-15
DE1488397A1 (en) 1969-04-10
SE324048B (en) 1970-05-19
BE671863A (en) 1966-05-05
AT265444B (en) 1968-10-10
NL6514433A (en) 1966-05-06
CH463605A (en) 1968-10-15

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