GB707400A - Improvements in and relating to magnetic amplifier circuits - Google Patents

Improvements in and relating to magnetic amplifier circuits

Info

Publication number
GB707400A
GB707400A GB4226/51A GB422651A GB707400A GB 707400 A GB707400 A GB 707400A GB 4226/51 A GB4226/51 A GB 4226/51A GB 422651 A GB422651 A GB 422651A GB 707400 A GB707400 A GB 707400A
Authority
GB
United Kingdom
Prior art keywords
phase
control
amplifier
windings
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
GB4226/51A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB707400A publication Critical patent/GB707400A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F9/00—Magnetic amplifiers
    • H03F9/04—Magnetic amplifiers voltage-controlled, i.e. the load current flowing in only one direction through a main coil, e.g. Logan circuits
    • 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
    • H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
    • H02P25/28—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring using magnetic devices with controllable degree of saturation, e.g. transductors

Landscapes

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

Abstract

707,400. Control of motors. BRITISH THOMSON-HOUSTON CO., Ltd. Feb. 21, 1951 [March 1, 1950], No. 4226/51. Class 38(3) [Also in Groups XXXVIII. and XXXIX] In a motor control system, a magnetic amplifier (see Group XXXIX) comprising two pairs of saturable reactors connected. in push-pull controls the direction of rotation of a motor in accordance with a signal applied to control windings 22, 23. Control of A.C. motors; a two phase motor 29, Fig. 1, has one phase 31 supplied from an A.C. source 4 over a phase shifting condenser 32, while the other phase 30 is energized from the same source over the magnetic amplifier and a transformer 28. The two pairs of saturable reactors are normally balanced and produce equal opposing D.C. voltage'in load resistors 14, 15 so that phase 30 is not energized. Application of a D.C. signal from potentiometer 24 to the control windings however unbalances the opposed voltages in the load resistors during successive half cycles of source voltage and produces an A.C. component which is applied to phase 30 over the transformer, the phase of the A.C. component being determined by the polarity of the D.C. signal so that directional control is effected. Control of D.C. motors; a motor 47, Fig. 2, is mechanically coupled to a load 48 and to the receiver rotor 46 of a selsyn system 40, 41 having its transmitter rotor 44 energized from an A.C. source 45 which also supplies the magnetic amplifier 35. This amplifier is normally balanced so that a similar amplifier 36 connected in cascade produces no output across resistors 14a, 15a. Lack of correspondence between the rotors 44, 46 however supplies an A.C. error signal to control windings 22, 23 and a resultant D.C. output across resistors 14, 15 is applied to control windings 22a, 23a of amplifier 36. This amplifier also becomes unbalanced and, since its windings 11a, 13a are connected in the reverse manner to the corresponding windings in amplifier 35, produces a D.C. output to the motor across 14a, 15a. The D.C. output polarity is determined by the phase relation of the error signal applied to windings 22, 23 and hence the direction of rotation of the motor to restore correspondence is determined.
GB4226/51A 1950-03-01 1951-02-21 Improvements in and relating to magnetic amplifier circuits Expired GB707400A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US707400XA 1950-03-01 1950-03-01

Publications (1)

Publication Number Publication Date
GB707400A true GB707400A (en) 1954-04-14

Family

ID=22097092

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4226/51A Expired GB707400A (en) 1950-03-01 1951-02-21 Improvements in and relating to magnetic amplifier circuits

Country Status (1)

Country Link
GB (1) GB707400A (en)

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