GB752135A - Improvements in or relating to electric motor control arrangements - Google Patents

Improvements in or relating to electric motor control arrangements

Info

Publication number
GB752135A
GB752135A GB1282654A GB1282654A GB752135A GB 752135 A GB752135 A GB 752135A GB 1282654 A GB1282654 A GB 1282654A GB 1282654 A GB1282654 A GB 1282654A GB 752135 A GB752135 A GB 752135A
Authority
GB
United Kingdom
Prior art keywords
motor
winding
speed
winder
tachometer 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
GB1282654A
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB1282654A priority Critical patent/GB752135A/en
Publication of GB752135A publication Critical patent/GB752135A/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
    • B66B1/02—Control systems without regulation, i.e. without retroactive action
    • B66B1/06—Control systems without regulation, i.e. without retroactive action electric
    • B66B1/12—Control systems without regulation, i.e. without retroactive action electric with devices, e.g. handles or levers, located at a control station for direct control movements, e.g. electric mining-hoist control systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Direct Current Motors (AREA)

Abstract

752,135. Automatic speed control systems. GENERAL ELECTRIC CO., Ltd., and FRIEDLANDER, E. S. April 13, 1955 [May 3, 1954], No. 12826/54. Class 38 (4). [Also in Group XXXVII] A three-phase, pilot motor 85 for controlling the rotor resistance of a winder motor 10 has the alternating current winding 74 of a magnetic amplifier connected in one of the supply lines to its stator, the two other phases of the motor 85 being joined to tappings in similar series-connected reactors 80, 81, which are connected across two phases of the supply. The junction of the reactors is joined to a tapping 174 near the centre of the winding 74. By controlling the degree of saturation of the magnetic amplifier the effective phase sequence of the current supplied to the motor 85 may be regulated, so that, when the amplifier is substantially unsaturated, there is a complete reversal of the phase sequence as compared with the fullysaturated condition. The magnetic amplifier has a control winding 70 and a biasing winding 73. A desired speed of the winder motor 10 may be set by adjustment of a manual control lever 24 which causes the hydraulic servo system SM to adjust the magnitude of the rotor resistance 12. The voltage of a tachometer generator 60 is compared with that derived from a reference potentiometer 72 and the error voltage is applied to the control winding 70. In this manner, the motor 85 adjusts the position of a toothed sector 78, which is linked with the slider 71 of the potentiometer 72, so that the attitude of a link 23 is dependent upon the speed of the motor 10. As a result, the magnitude of the resistance 12 is made dependent upon the speed of the motor 10 as well as the setting of the manual control lever 24. One armature terminal of the tachometer generator is connected to the negative terminal of the auxiliary direct-current supply 63 during driving operation of the winder motor, and to the positive terminal for dynamic braking, by means of a change-over switch 163. A doublepole change-over switch 62 for. the field winding 61 of the tachometer generator occupies different positions according to the operating conditions of the winder motor.
GB1282654A 1954-05-03 1954-05-03 Improvements in or relating to electric motor control arrangements Expired GB752135A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1282654A GB752135A (en) 1954-05-03 1954-05-03 Improvements in or relating to electric motor control arrangements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1282654A GB752135A (en) 1954-05-03 1954-05-03 Improvements in or relating to electric motor control arrangements

Publications (1)

Publication Number Publication Date
GB752135A true GB752135A (en) 1956-07-04

Family

ID=10011850

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1282654A Expired GB752135A (en) 1954-05-03 1954-05-03 Improvements in or relating to electric motor control arrangements

Country Status (1)

Country Link
GB (1) GB752135A (en)

Similar Documents

Publication Publication Date Title
US2462751A (en) Speed control for induction motors
GB717905A (en) Improvements in and relating to magnetic amplifier control systems
GB654476A (en) Improvements in or relating to electric motor control systems
GB752135A (en) Improvements in or relating to electric motor control arrangements
US2663833A (en) Magnetic amplifier creeping speed control
GB1043225A (en) Improvements in or relating to speed control systems for electric motors
US2658152A (en) Power system
US3644817A (en) Plural supply stepper motor control system
US3281633A (en) Lowering speed control for a.-g. hoist
US2855555A (en) Motor control circuits
GB962096A (en) Control system with quick response to reference changes
US2503718A (en) Alternating-current electric motor equipment
GB928019A (en) A device for weakening the field of direct-current serieswound motors
US3077556A (en) Electric drive
GB722744A (en) Improvements relating to electric motor control systems
GB715340A (en) Improvements in or relating to liquid resistances and to electric motor control equipment including such resistances
GB774691A (en) Improvements in or relating to electric motor control arrangements
GB721686A (en) Improvements in or relating to electric motor control systems
GB835924A (en) Improvements in or relating to electric motor control arrangements
GB1003312A (en) Improvements in variable speed electric drives
GB735002A (en) Improvements relating to the control of electrically operated winding or like mechanisms
GB738429A (en) Improvements in and relating to the control of alternating current electric motor equipments
GB773624A (en) Improvements in or relating to electric motor control systems
GB844363A (en) Improvements in and relating to electric control systems for a plurality of direct current motors
GB697609A (en) Improvements in or relating to electric motor control systems