GB273750A - Methods of controlling three-phase motors with reverse current braking, particularlyfor crane driving and like purposes - Google Patents

Methods of controlling three-phase motors with reverse current braking, particularlyfor crane driving and like purposes

Info

Publication number
GB273750A
GB273750A GB17551/27A GB1755127A GB273750A GB 273750 A GB273750 A GB 273750A GB 17551/27 A GB17551/27 A GB 17551/27A GB 1755127 A GB1755127 A GB 1755127A GB 273750 A GB273750 A GB 273750A
Authority
GB
United Kingdom
Prior art keywords
particularlyfor
purposes
controlling
methods
electric
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
GB17551/27A
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.)
General Electric Co
Original Assignee
General Electric Co
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 filed Critical General Electric Co
Publication of GB273750A publication Critical patent/GB273750A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices
    • B66C13/22—Control systems or devices for electric drives
    • B66C13/23—Circuits for controlling the lowering of the load
    • B66C13/26—Circuits for controlling the lowering of the load by ac motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C2700/00—Cranes
    • B66C2700/08—Electrical assemblies or electrical control devices for cranes, winches, capstans or electrical hoists
    • B66C2700/081—Electrical assemblies or electrical control devices for cranes, winches, capstans or electrical hoists with ac motors

Landscapes

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

Abstract

273,750. International General Electric Co., Inc., (Assignees of Allgemeine Elektricitõts-Ges.). July 1, 1926, [Convention date]. Addition to 251,503. Drawings to Specification. Electric brakes; actuated or applied by speed regulators.-In braking a polyphase hoisting motor by applying electric and mechanical braking in succession under the control of a falling-speed relay according to the invention of the parent Specification, the relay coil is excited by a small dynamo-electric machine mechanically coupled to the working motor and arranged to supply increasing voltage as the speed decreases. Means may be provided for switching off the motor automatically a certain time after it has come to rest.
GB17551/27A 1926-07-01 1927-07-01 Methods of controlling three-phase motors with reverse current braking, particularlyfor crane driving and like purposes Expired GB273750A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE273750X 1926-07-01

Publications (1)

Publication Number Publication Date
GB273750A true GB273750A (en) 1927-11-10

Family

ID=6016839

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17551/27A Expired GB273750A (en) 1926-07-01 1927-07-01 Methods of controlling three-phase motors with reverse current braking, particularlyfor crane driving and like purposes

Country Status (1)

Country Link
GB (1) GB273750A (en)

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