GB880026A - Improvements in or relating to apparatus for controlling the sequential operation of switch means and to electric motor control arrangements including such apparatus - Google Patents

Improvements in or relating to apparatus for controlling the sequential operation of switch means and to electric motor control arrangements including such apparatus

Info

Publication number
GB880026A
GB880026A GB2588958A GB2588958A GB880026A GB 880026 A GB880026 A GB 880026A GB 2588958 A GB2588958 A GB 2588958A GB 2588958 A GB2588958 A GB 2588958A GB 880026 A GB880026 A GB 880026A
Authority
GB
United Kingdom
Prior art keywords
windings
control
magnitude
control handle
switches
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
GB2588958A
Inventor
Erich Siegfried Friedlander
John Hamilton
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 GB2588958A priority Critical patent/GB880026A/en
Publication of GB880026A publication Critical patent/GB880026A/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
    • 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
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
    • H02P25/28—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring using magnetic devices with controllable degree of saturation, e.g. transductors

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Power Engineering (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

880,026. Switching-systems. GENERAL ELECTRIC CO. Ltd. Aug. 10, 1959 [Aug. 12, 1958], No. 25889/58. Class 38 (4). [Also in Group XXXVII] In apparatus for controlling the sequential operation of a number of switches 13, each switch is operated by a bi-stable magnetic amplifier 14 having opposed control windings 17, 18, the turns-ratio between the two control windings varying progressively for successive amplifiers so that the number of switches which are operated is a function of the ratio between control signals supplied respectively to the windings 17 and 18. When a control handle 24 is displaced to close a contactor 41, an induction motor 10 starts with the maximum value of resistance 12 in its rotor circuit. A signal dependent upon the speed of the induction motor derived from control generator 22 is fed to the windings 17. The magnitude of the signal applied to the windings 18 is dependent upon the setting of the control handle, so that the number of switches 13 energized is a function of both the slip and of the setting of the control handle. During braking D.C. excitation from rectifier 37, which is fed through the A.C. windings of saturable reactor 35, is applied to the primary windings of the induction motor. The magnitude of this D.C. excitation depends upon the setting of the control handle 24 which also varies the magnitude of the current supplied to the windings 18. This signal has two components, one pre-set in magnitude and the other varying in accordance with the displacement of the control handle from its mid-position. When the dynamic braking contactor is closed, the sliprings of the control generator 22 are supplied from rectifier 31. Amplifiers other than magnetic amplifiers may be used, and the system applied to the control of resistance sections in circuit with the field winding of a D.C. motor. The resistance sections may be fixed resistances between electrodes in an electrolytic tank. The switching arrangement may be used for controlling reactive impedance sections for power factor correction. Specifications 715,340, 717,253 and 738,310 are referred to.
GB2588958A 1958-08-12 1958-08-12 Improvements in or relating to apparatus for controlling the sequential operation of switch means and to electric motor control arrangements including such apparatus Expired GB880026A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2588958A GB880026A (en) 1958-08-12 1958-08-12 Improvements in or relating to apparatus for controlling the sequential operation of switch means and to electric motor control arrangements including such apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2588958A GB880026A (en) 1958-08-12 1958-08-12 Improvements in or relating to apparatus for controlling the sequential operation of switch means and to electric motor control arrangements including such apparatus

Publications (1)

Publication Number Publication Date
GB880026A true GB880026A (en) 1961-10-18

Family

ID=10235016

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2588958A Expired GB880026A (en) 1958-08-12 1958-08-12 Improvements in or relating to apparatus for controlling the sequential operation of switch means and to electric motor control arrangements including such apparatus

Country Status (1)

Country Link
GB (1) GB880026A (en)

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