GB740033A - Speed-indicating and automatic control system for electric motors - Google Patents

Speed-indicating and automatic control system for electric motors

Info

Publication number
GB740033A
GB740033A GB8283/54A GB828354A GB740033A GB 740033 A GB740033 A GB 740033A GB 8283/54 A GB8283/54 A GB 8283/54A GB 828354 A GB828354 A GB 828354A GB 740033 A GB740033 A GB 740033A
Authority
GB
United Kingdom
Prior art keywords
motor
main motor
speed
driven
contact arm
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
GB8283/54A
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.)
Forges et Ateliers de Constructions Electriques de Jeumont SA
Original Assignee
Forges et Ateliers de Constructions Electriques de Jeumont SA
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 Forges et Ateliers de Constructions Electriques de Jeumont SA filed Critical Forges et Ateliers de Constructions Electriques de Jeumont SA
Publication of GB740033A publication Critical patent/GB740033A/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
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/0016—Control of angular speed of one shaft without controlling the prime mover

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Control Of Multiple Motors (AREA)

Abstract

740,033. Control of several motors. FORGES ET ATELIERS DE CONSTRUCTIONS ELECTRIQUES DE JEUMONT. March 22, 1954 [March 27, 19531, No. 8283/54. Class 38(3) [Also in Group XXXVIII] The speed of a main motor 1 is indicated by the position of a contact arm 24 movable over a potentiometer 17 to regulate the speed of an auxiliary motor 12 to equality with that of the main motor, the contact arm being driven in accordance with the difference of the motor speeds through a differential mechanism. The differential sun-wheels 7, 11 are driven by the respective motors 1, 12 through electromagnetic clutches 6, 13 and various controls are effected as a function of the speed of the main motor by de-energizing one or the other of these clutches. Thus, rocking a brake lever 9a de-energizes the winding 8 of clutch 6, and locks the sun-wheel 7, whereby the contact arm 24 is driven by the auxiliary motor at a continuously decreasing speed to the position a where it closes limit contacts 26 which may de-energize the main motor armature 3 and operate a brake 5 to stop the motor. The closure of contacts 26 may also act on the generator supplying the main motor or upon various safety or signalling devices to produce precise slowdown and stopping of the load 2, e.g., a mine hoist, driven by the main motor. The motor 1 may be reversible, in which case a reversing device 28 is provided for the auxiliary motor. Similarly, by using the brake 15a to disengage clutch 13 and lock the sun-wheel 11, the contact arm 24 is driven at a speed corresponding to that of the main motor to position e to close limit contacts 27. This closure may control various safety operations and initiate the slow-down of the main motor.
GB8283/54A 1953-03-27 1954-03-22 Speed-indicating and automatic control system for electric motors Expired GB740033A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR740033X 1953-03-27

Publications (1)

Publication Number Publication Date
GB740033A true GB740033A (en) 1955-11-09

Family

ID=9133129

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8283/54A Expired GB740033A (en) 1953-03-27 1954-03-22 Speed-indicating and automatic control system for electric motors

Country Status (1)

Country Link
GB (1) GB740033A (en)

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