GB278754A - Improvements in electric motor control systems - Google Patents

Improvements in electric motor control systems

Info

Publication number
GB278754A
GB278754A GB26799/27A GB2679927A GB278754A GB 278754 A GB278754 A GB 278754A GB 26799/27 A GB26799/27 A GB 26799/27A GB 2679927 A GB2679927 A GB 2679927A GB 278754 A GB278754 A GB 278754A
Authority
GB
United Kingdom
Prior art keywords
control switch
electric motor
motor control
control systems
brake
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
GB26799/27A
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.)
JAMES BRUCE PRICE
Original Assignee
JAMES BRUCE PRICE
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 JAMES BRUCE PRICE filed Critical JAMES BRUCE PRICE
Publication of GB278754A publication Critical patent/GB278754A/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)
  • Control Of Ac Motors In General (AREA)
  • Motor And Converter Starters (AREA)
  • Control And Safety Of Cranes (AREA)

Abstract

278,754. Price, J. B. Oct.. 9, 1926, [Convention date]. Electric and magnetic.-In starting an alternating-current motor 1 by transformer coils 5, 6 in conjunction with a three-position control switch 26, a brake-releasing coil 9 is energized when the control switch is put into the starting of reduced-voltage position, and an auxiliary circuit is established through a relay 10 whereby the brake-releasing coil continues to be energized during the change-over to the running or fullvoltage position of the control switch. The motor may drive a load-conveyer on a hoist.
GB26799/27A 1926-10-09 1927-10-10 Improvements in electric motor control systems Expired GB278754A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US278754XA 1926-10-09 1926-10-09

Publications (1)

Publication Number Publication Date
GB278754A true GB278754A (en) 1928-01-12

Family

ID=21840270

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26799/27A Expired GB278754A (en) 1926-10-09 1927-10-10 Improvements in electric motor control systems

Country Status (1)

Country Link
GB (1) GB278754A (en)

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