GB320889A - Improvements in or relating to systems of control for alternating current electric motors - Google Patents

Improvements in or relating to systems of control for alternating current electric motors

Info

Publication number
GB320889A
GB320889A GB2117228A GB2117228A GB320889A GB 320889 A GB320889 A GB 320889A GB 2117228 A GB2117228 A GB 2117228A GB 2117228 A GB2117228 A GB 2117228A GB 320889 A GB320889 A GB 320889A
Authority
GB
United Kingdom
Prior art keywords
rotor
speed
motor
stator
frequency
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
GB2117228A
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.)
AT&T Corp
Original Assignee
Bell Telephone Laboratories Inc
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 Bell Telephone Laboratories Inc filed Critical Bell Telephone Laboratories Inc
Priority to GB2117228A priority Critical patent/GB320889A/en
Publication of GB320889A publication Critical patent/GB320889A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02—Asynchronous induction motors
    • H02K17/22—Asynchronous induction motors having rotors with windings connected to slip-rings
    • H02K17/24—Asynchronous induction motors having rotors with windings connected to slip-rings in which both stator and rotor are fed with AC

Landscapes

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

Abstract

320,889. Beatty, W. E., (Bell Telephone Laboratories, Inc.). July 21, 1928. Constant-speed control systems. - An A.C. motor the speed of which depends on the frequency of current supplied to its windings is held at constant speed by arranging so that if either the rotor winding or the stator winding receives current of variable frequency, the other winding receives current varying similarly, the sum or difference of frequency remaining unchanged. In the arrangement shown in the drawing a motor 19 has its rotor fed from a variable frequency source 13 which also feeds the rotor of a generator 14 driven at constant speed and having its stator connected to feed the stator of the motor 19, the direction in which the generator is driven being the same as the direction of rotation of the magnetic field in the rotor. Additional motors 20, 21 may be connected to the first so that all run at the same speed. The motors may be used to drive cameras and sound recorders in the production of sound-films.
GB2117228A 1928-07-21 1928-07-21 Improvements in or relating to systems of control for alternating current electric motors Expired GB320889A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2117228A GB320889A (en) 1928-07-21 1928-07-21 Improvements in or relating to systems of control for alternating current electric motors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2117228A GB320889A (en) 1928-07-21 1928-07-21 Improvements in or relating to systems of control for alternating current electric motors

Publications (1)

Publication Number Publication Date
GB320889A true GB320889A (en) 1929-10-21

Family

ID=10158367

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2117228A Expired GB320889A (en) 1928-07-21 1928-07-21 Improvements in or relating to systems of control for alternating current electric motors

Country Status (1)

Country Link
GB (1) GB320889A (en)

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