GB279433A - Improvements in and relating to systems of electric motor control - Google Patents

Improvements in and relating to systems of electric motor control

Info

Publication number
GB279433A
GB279433A GB27057/27A GB2705727A GB279433A GB 279433 A GB279433 A GB 279433A GB 27057/27 A GB27057/27 A GB 27057/27A GB 2705727 A GB2705727 A GB 2705727A GB 279433 A GB279433 A GB 279433A
Authority
GB
United Kingdom
Prior art keywords
exciter
magnet
resistance
field winding
generator
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
GB27057/27A
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 GB279433A publication Critical patent/GB279433A/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
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
    • H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
    • H02P7/34—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using Ward-Leonard arrangements

Landscapes

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

Abstract

279,433. British Thomson-Houston Co., Ltd., (Assignees of Eaton, J.). Oct. 19, 1926, [Convention date]. Systems for continous-current motors.-In the control of a lift motor 10 fed according to the Leonard system, by a local generator 14 having a variable field winding 15 subject to a separate exciter 20 and an opposing field winding 26 in series in the working circuit, momentary initial over-excitation of the generator field is provided for by the fact that the set starts with part of the regulating resistance 18 short-circuited and with an exciter diverting resistance 21 in action. as shown in the Figure. When the hand-controller 19 is turned clockwise for lifting or counter-clockwise for lowering, the corresponding directional switch-magnet 22 or 23 is energized. the over-excitation lasting for a short period determined by response of a relay 28, which controls a switch-magnet 27 arranged to put in the full regulating resistance 18 and to short-circuit part of the exciter diverting resistance 21. The relay 28 has the further function of momentarily delaying the energization of a brake-releasing magnet 29. The working motor has a controllable separately excited field winding 12, and the Leonard generator is driven by a three-phase motor 24. Specification 231,891 is referred to.
GB27057/27A 1926-10-19 1927-10-12 Improvements in and relating to systems of electric motor control Expired GB279433A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US279433XA 1926-10-19 1926-10-19

Publications (1)

Publication Number Publication Date
GB279433A true GB279433A (en) 1928-01-05

Family

ID=21840658

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27057/27A Expired GB279433A (en) 1926-10-19 1927-10-12 Improvements in and relating to systems of electric motor control

Country Status (1)

Country Link
GB (1) GB279433A (en)

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