GB548771A - Improvements in or relating to the speed control of electric motors - Google Patents

Improvements in or relating to the speed control of electric motors

Info

Publication number
GB548771A
GB548771A GB9029/41A GB902941A GB548771A GB 548771 A GB548771 A GB 548771A GB 9029/41 A GB9029/41 A GB 9029/41A GB 902941 A GB902941 A GB 902941A GB 548771 A GB548771 A GB 548771A
Authority
GB
United Kingdom
Prior art keywords
generator
load
relating
speed control
battery
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
GB9029/41A
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.)
Scophony Ltd
Original Assignee
Scophony 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 Scophony Ltd filed Critical Scophony Ltd
Priority to GB9029/41A priority Critical patent/GB548771A/en
Publication of GB548771A publication Critical patent/GB548771A/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
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
    • H02P25/022—Synchronous motors
    • H02P25/024—Synchronous motors controlled by supply frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Charge By Means Of Generators (AREA)

Abstract

548,771. Inductor-alternators. SCOPHONY, Ltd., and JONES, P. L. F. July 17, 1941, No. 9029. [Class 35] [Also in Group XXXVII] A motor is maintained at constant speed by driving an A.C. generator connected to a tuned load circuit, so that upon slight increase of speed the load on the generator increases rapidly. The generator is of the phonic wheel type, the stator poles being energized by a battery 13, and the induced A.C. being applied to a tuned load 16, 17. The tuned load may be an electro-mechanical vibrator. A choke 14 prevents A.C. flowing through the battery or a bridge arrangement, Fig. 3 (not shown) allows the generated A.C. and the exciting D.C. to circulate in separate circuits.
GB9029/41A 1941-07-17 1941-07-17 Improvements in or relating to the speed control of electric motors Expired GB548771A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9029/41A GB548771A (en) 1941-07-17 1941-07-17 Improvements in or relating to the speed control of electric motors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9029/41A GB548771A (en) 1941-07-17 1941-07-17 Improvements in or relating to the speed control of electric motors

Publications (1)

Publication Number Publication Date
GB548771A true GB548771A (en) 1942-10-23

Family

ID=9864003

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9029/41A Expired GB548771A (en) 1941-07-17 1941-07-17 Improvements in or relating to the speed control of electric motors

Country Status (1)

Country Link
GB (1) GB548771A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4785228A (en) * 1987-02-04 1988-11-15 Goddard Sydney L Electrical energy enhancement apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4785228A (en) * 1987-02-04 1988-11-15 Goddard Sydney L Electrical energy enhancement apparatus

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