GB627625A - Improvements in or relating to electric motor control systems - Google Patents

Improvements in or relating to electric motor control systems

Info

Publication number
GB627625A
GB627625A GB307047A GB307047A GB627625A GB 627625 A GB627625 A GB 627625A GB 307047 A GB307047 A GB 307047A GB 307047 A GB307047 A GB 307047A GB 627625 A GB627625 A GB 627625A
Authority
GB
United Kingdom
Prior art keywords
motor
short
motors
resistors
circuited
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
GB307047A
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.)
Westland Group PLC
Original Assignee
Westland Aircraft 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 Westland Aircraft Ltd filed Critical Westland Aircraft Ltd
Priority to GB307047A priority Critical patent/GB627625A/en
Publication of GB627625A publication Critical patent/GB627625A/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
    • H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
    • H02P5/68—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more dc dynamo-electric motors

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Protection Of Generators And Motors (AREA)
  • Control Of Multiple Motors (AREA)

Abstract

627,625. Control of two motors. WESTLAND AIRCRAFT, Ltd., and SWAFFIELD, P. J. Jan. 31, 1947, No. 3070. [Class 38(iii)] A, control system for two separate motors connected in parallel to a current supply source and normally sharing a load, for example one or more fans, incorporates means operating automatically upon failure and cutting out of circuit of either motor to reduce the flow of current through the other motor which still continues to operate. Normally motors A and B are connected in parallel by closure of switches 5 and 6, resistors 3 and 8 being short-circuited by relays 4 and 7 respectively. When the motor A fails, for example, the switch 5 opens to isolate that motor, and the solenoid 13, which is connected across the armature 2, is de-energized to introduce resistor 8 in series with armature 9 so limiting the current therethrough. Similar operation occurs when the other motor fails. In an alternative arrangement, resistors included in the field circuit of each motor are short-circuited to provide increased field strength of one motor upon failure of the other. The short-circuiting devices may be centrifugally operated. Inductances may replace the protective resistors.
GB307047A 1947-01-31 1947-01-31 Improvements in or relating to electric motor control systems Expired GB627625A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB307047A GB627625A (en) 1947-01-31 1947-01-31 Improvements in or relating to electric motor control systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB307047A GB627625A (en) 1947-01-31 1947-01-31 Improvements in or relating to electric motor control systems

Publications (1)

Publication Number Publication Date
GB627625A true GB627625A (en) 1949-08-12

Family

ID=9751427

Family Applications (1)

Application Number Title Priority Date Filing Date
GB307047A Expired GB627625A (en) 1947-01-31 1947-01-31 Improvements in or relating to electric motor control systems

Country Status (1)

Country Link
GB (1) GB627625A (en)

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