GB732281A - Eddy current brakes for crane motors - Google Patents

Eddy current brakes for crane motors

Info

Publication number
GB732281A
GB732281A GB612253A GB612253A GB732281A GB 732281 A GB732281 A GB 732281A GB 612253 A GB612253 A GB 612253A GB 612253 A GB612253 A GB 612253A GB 732281 A GB732281 A GB 732281A
Authority
GB
United Kingdom
Prior art keywords
brake
current
field winding
motor
eddy
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
GB612253A
Inventor
George Norman Cadbury
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.)
E M B CO Ltd
EMB Co Ltd
Original Assignee
E M B CO Ltd
EMB Co Ltd
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 E M B CO Ltd, EMB Co Ltd filed Critical E M B CO Ltd
Priority to GB612253A priority Critical patent/GB732281A/en
Publication of GB732281A publication Critical patent/GB732281A/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
    • H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
    • H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
    • H02P3/18—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an ac motor

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Stopping Of Electric Motors (AREA)
  • Control And Safety Of Cranes (AREA)

Abstract

732,281. Eddy-current brakes. E. M. B. CO., Ltd. March 3, 1954 [March 5, 1953], No. 6122/53. Class 103 (1). [Also in Group XXXVII] An eddy-current brake a, which may be of the squirrel-cage type, is mechanically coupled directly or indirectly to a crane motor b, the field winding c of the brake being supplied from power source d through rectifier e. A variable resistance f is connected in series with the field winding of the brake, and at least one centrifugal switch h, responsive to the speed of the brake rotor, automatically interrupts the supply of current to the winding c at a predetermined speed. The circuit through the field winding of the brake may be controlled in part by contacts on the motor regulator i. A safety relay m disconnects the motor if there is an excessive current in the system associated with the brake.
GB612253A 1953-03-05 1953-03-05 Eddy current brakes for crane motors Expired GB732281A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB612253A GB732281A (en) 1953-03-05 1953-03-05 Eddy current brakes for crane motors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB612253A GB732281A (en) 1953-03-05 1953-03-05 Eddy current brakes for crane motors

Publications (1)

Publication Number Publication Date
GB732281A true GB732281A (en) 1955-06-22

Family

ID=9808812

Family Applications (1)

Application Number Title Priority Date Filing Date
GB612253A Expired GB732281A (en) 1953-03-05 1953-03-05 Eddy current brakes for crane motors

Country Status (1)

Country Link
GB (1) GB732281A (en)

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