GB487695A - Improvements in and relating to methods of braking asynchronous electric motors - Google Patents

Improvements in and relating to methods of braking asynchronous electric motors

Info

Publication number
GB487695A
GB487695A GB1382/37A GB138237A GB487695A GB 487695 A GB487695 A GB 487695A GB 1382/37 A GB1382/37 A GB 1382/37A GB 138237 A GB138237 A GB 138237A GB 487695 A GB487695 A GB 487695A
Authority
GB
United Kingdom
Prior art keywords
motor
supply
phase
braking
tapping
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
GB1382/37A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB487695A publication Critical patent/GB487695A/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
    • H02P3/22—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 short-circuit or resistive braking

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Stopping Of Electric Motors (AREA)

Abstract

487,695. Control of A.C. motors. BRITISH THOMSON-HOUSTON CO., Ltd. Jan. 16, 1937, No. 1382. Convention date, Jan. 17, 1936. [Class 38 (iii)] Dynamo - electric braking.-For normal running of an asynchronous motor, a switch S is placed in position 1, and the stator winding UVW is connected in delta to the supply. For braking, the switch S is moved to position 2 thereby disconnecting the phase connection V from the supply and connecting it, through an impedance Z which may be variable, to a tapping point A on the motor phase winding UW which remains connected to the supply. The motor resistance is sufficiently high for the motoring torque to attain its maximum value at a point on the torque-speed curve in the neighbourhood of zero speed. The motor phase winding UW may have several tapping points, and the phase windings of the motor may be arranged to give two different pole numbers. The Specification as open to inspection under Sect. 91 comprises also a braking connection in which the phase connections UW are shortcircuited directly or through a resistance, and the supply is connected to the tapping A and the phase connection V. This subject-matter does not appear in the Specification as accepted.
GB1382/37A 1936-01-17 1937-01-16 Improvements in and relating to methods of braking asynchronous electric motors Expired GB487695A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE487695X 1936-01-17

Publications (1)

Publication Number Publication Date
GB487695A true GB487695A (en) 1938-06-24

Family

ID=6543673

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1382/37A Expired GB487695A (en) 1936-01-17 1937-01-16 Improvements in and relating to methods of braking asynchronous electric motors

Country Status (1)

Country Link
GB (1) GB487695A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2420192A (en) * 1943-06-14 1947-05-06 Electric Controller & Mfg Co Induction motor control system
US2460234A (en) * 1943-06-18 1949-01-25 Electric Controller & Mfg Co Induction motor control system
US2478155A (en) * 1945-07-13 1949-08-02 Singer Mfg Co Polyphase motor braking system
US2478160A (en) * 1945-12-22 1949-08-02 Singer Mfg Co System of electrical braking
US2505258A (en) * 1943-02-16 1950-04-25 Willard C Robinette Electronic motor control system
US2816258A (en) * 1955-01-10 1957-12-10 Allis Louis Co Dynamically braked polyphase induction motor
GB2228376A (en) * 1984-10-09 1990-08-22 Ferranti Plc Tuning drive arrangement for spin-tuned magnetron

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2505258A (en) * 1943-02-16 1950-04-25 Willard C Robinette Electronic motor control system
US2420192A (en) * 1943-06-14 1947-05-06 Electric Controller & Mfg Co Induction motor control system
US2460234A (en) * 1943-06-18 1949-01-25 Electric Controller & Mfg Co Induction motor control system
US2478155A (en) * 1945-07-13 1949-08-02 Singer Mfg Co Polyphase motor braking system
US2478160A (en) * 1945-12-22 1949-08-02 Singer Mfg Co System of electrical braking
US2816258A (en) * 1955-01-10 1957-12-10 Allis Louis Co Dynamically braked polyphase induction motor
GB2228376A (en) * 1984-10-09 1990-08-22 Ferranti Plc Tuning drive arrangement for spin-tuned magnetron
GB2228376B (en) * 1984-10-09 1990-11-21 Ferranti Plc Tuning drive arrangement for spin-tuned magnetron

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