GB972132A - Means for controlling the speed of a synchronous electric motor - Google Patents

Means for controlling the speed of a synchronous electric motor

Info

Publication number
GB972132A
GB972132A GB25580/61A GB2558061A GB972132A GB 972132 A GB972132 A GB 972132A GB 25580/61 A GB25580/61 A GB 25580/61A GB 2558061 A GB2558061 A GB 2558061A GB 972132 A GB972132 A GB 972132A
Authority
GB
United Kingdom
Prior art keywords
speed
modulators
frequency
controlling
electric motor
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
GB25580/61A
Inventor
John Lewis Edwin Baldwin
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.)
Rank Bush Murphy Ltd
Original Assignee
Rank Bush Murphy 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 Rank Bush Murphy Ltd filed Critical Rank Bush Murphy Ltd
Priority to GB25580/61A priority Critical patent/GB972132A/en
Publication of GB972132A publication Critical patent/GB972132A/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
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
    • 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)
  • Rotational Drive Of Disk (AREA)

Abstract

972,132. Control of A.C. motors. RANKBUSH MURPHY Ltd. July 16, 1962 [July 14, 1961], No. 25580/61. Heading H2J. A variable-frequency supply for varying the speed of a three-phase synchronous motor 1 comprises the difference frequency derived from modulators 9, 10, 11, fed by a fixed oscillator 6 and a variable oscillator 3 controllable by a D.C. signal at 2. Phase shifters 7, 8 introduce Π120 degrees phase shift in the supply to modulators 10, 11. The modulators are preferably ring-type. If the frequency range of the variable oscillator 3 includes the fixed frequency 6, the motor may be reversed.
GB25580/61A 1961-07-14 1961-07-14 Means for controlling the speed of a synchronous electric motor Expired GB972132A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB25580/61A GB972132A (en) 1961-07-14 1961-07-14 Means for controlling the speed of a synchronous electric motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB25580/61A GB972132A (en) 1961-07-14 1961-07-14 Means for controlling the speed of a synchronous electric motor

Publications (1)

Publication Number Publication Date
GB972132A true GB972132A (en) 1964-10-07

Family

ID=10229981

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25580/61A Expired GB972132A (en) 1961-07-14 1961-07-14 Means for controlling the speed of a synchronous electric motor

Country Status (1)

Country Link
GB (1) GB972132A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0017403A1 (en) * 1979-03-22 1980-10-15 Fanuc Ltd. A method of, and apparatus for, operating an induction motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0017403A1 (en) * 1979-03-22 1980-10-15 Fanuc Ltd. A method of, and apparatus for, operating an induction motor

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