GB625951A - Improvements in or relating to alternating current electric motor equipments - Google Patents

Improvements in or relating to alternating current electric motor equipments

Info

Publication number
GB625951A
GB625951A GB676647A GB676647A GB625951A GB 625951 A GB625951 A GB 625951A GB 676647 A GB676647 A GB 676647A GB 676647 A GB676647 A GB 676647A GB 625951 A GB625951 A GB 625951A
Authority
GB
United Kingdom
Prior art keywords
braking
motoring
winding during
relating
electric motor
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
GB676647A
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 GB676647A priority Critical patent/GB625951A/en
Publication of GB625951A publication Critical patent/GB625951A/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)
  • Stopping Of Electric Motors (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

625,951. Control of A.C. motors. GENERAL ELECTRIC CO., Ltd., and FRIEDLANDER, E. S. March 11, 1947, No. 6766. Drawings to Specification. [Class 38(iii)] The subject-matter of this Specification is substantially the same as that described in Specification 625,950, but the claims relate to an alternating-current motor equipment including a wound rotor induction motor arranged for dynamic braking and a load circuit or circuits arranged to be connected with the generating winding during both motoring and braking, wherein a single means operating in dependence upon the speed of the said motor is arranged to operate further means adapted to control the impedance of the said load circuit or circuits both during motoring and braking in such a manner as to produce, with a constant value of current in the exciting winding during braking and with a constant alternating voltage across the said winding during motoring, a torque that is substantially constant or follows a predetermined torque/speed characteristic. Specification 613,856 also is referred to.
GB676647A 1947-03-11 1947-03-11 Improvements in or relating to alternating current electric motor equipments Expired GB625951A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB676647A GB625951A (en) 1947-03-11 1947-03-11 Improvements in or relating to alternating current electric motor equipments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB676647A GB625951A (en) 1947-03-11 1947-03-11 Improvements in or relating to alternating current electric motor equipments

Publications (1)

Publication Number Publication Date
GB625951A true GB625951A (en) 1949-07-06

Family

ID=9820361

Family Applications (1)

Application Number Title Priority Date Filing Date
GB676647A Expired GB625951A (en) 1947-03-11 1947-03-11 Improvements in or relating to alternating current electric motor equipments

Country Status (1)

Country Link
GB (1) GB625951A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2754461A (en) * 1951-11-16 1956-07-10 Gen Electric Co Ltd Liquid resistances and to electric motor control equipment, including such resistances

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2754461A (en) * 1951-11-16 1956-07-10 Gen Electric Co Ltd Liquid resistances and to electric motor control equipment, including such resistances

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