GB910891A - Magnetic amplifier - Google Patents

Magnetic amplifier

Info

Publication number
GB910891A
GB910891A GB3045159A GB3045159A GB910891A GB 910891 A GB910891 A GB 910891A GB 3045159 A GB3045159 A GB 3045159A GB 3045159 A GB3045159 A GB 3045159A GB 910891 A GB910891 A GB 910891A
Authority
GB
United Kingdom
Prior art keywords
motor
bridge
windings
control
relay
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
GB3045159A
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.)
Landis and Gyr AG
Original Assignee
Landis and Gyr AG
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 Landis and Gyr AG filed Critical Landis and Gyr AG
Publication of GB910891A publication Critical patent/GB910891A/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
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B11/00—Automatic controllers
    • G05B11/01—Automatic controllers electric
    • G05B11/012—Automatic controllers electric details of the transmission means
    • G05B11/016—Automatic controllers electric details of the transmission means using inductance means
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00—Control of position or direction
    • G05D3/12—Control of position or direction using feedback
    • G05D3/14—Control of position or direction using feedback using an analogue comparing device
    • G05D3/1418—Control of position or direction using feedback using an analogue comparing device with ac amplifier chain
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00—Control of position or direction
    • G05D3/12—Control of position or direction using feedback
    • G05D3/14—Control of position or direction using feedback using an analogue comparing device
    • G05D3/1472—Control of position or direction using feedback using an analogue comparing device with potentiometer

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Power Engineering (AREA)
  • Control Of Electric Motors In General (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Control Of Direct Current Motors (AREA)

Abstract

910,891. Magnetic amplifiers. LANDIS & GYR A.G. Sept. 7, 1959 [Sept. 8, 1958], No. 30451/59. Class 40 (9). Two auto-self-excited full-wave rectifying transductors 8, 9, Fig. 1, operating in push-pull are supplied from a common centre-tapped transformer 4 and control a centre-zero relay 16, the relay coils being each shunted by a capacitor-resistor circuit 27, 28 from which a rate feedback is applied to positive feedback windings 25. The control windings 21 are fed through rectifier 18 from transformer 4 by a variable resistance bridge 22, 23. Preferably bias windings 17 are provided. Sufficient lack of correspondence in the bridge unbalances the output of the transductors and operates the relay 16 to start a motor 15- in such direction to restore correspondence through a drive 31 which drives the slider of potentiometer 23. The arrangement is such that within the range of control current a to - a, Fig. 3, there is an insensitivity zone in which the motor is not driven, within the control current ranges a to b and - a to - b, the motor is driven intermittently (the output voltage U having an alternating component as well as a direct component) and beyond the control current values b and - b the motor is driven continuously to balance the bridge. Rectifiers 24 limit inadmissably high voltage differences in the bridge 23. Resistors 33 remove harmonics. The capacitors 28 may be replaced by transformers to provide the rate feedback, but capacitors are preferred since they also remove harmonics from the output current.
GB3045159A 1958-09-08 1959-09-07 Magnetic amplifier Expired GB910891A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH6368858 1958-09-08

Publications (1)

Publication Number Publication Date
GB910891A true GB910891A (en) 1962-11-21

Family

ID=4525150

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3045159A Expired GB910891A (en) 1958-09-08 1959-09-07 Magnetic amplifier

Country Status (4)

Country Link
CH (1) CH362122A (en)
DE (1) DE1056183B (en)
GB (1) GB910891A (en)
NL (2) NL104566C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2343070A (en) * 1998-10-23 2000-04-26 Coutant Lambda Limited Magnetic amplifier circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2343070A (en) * 1998-10-23 2000-04-26 Coutant Lambda Limited Magnetic amplifier circuit
GB2343070B (en) * 1998-10-23 2002-08-14 Coutant Lambda Ltd Magnetic amplifier circuit

Also Published As

Publication number Publication date
NL104566C (en)
NL242667A (en)
DE1056183B (en) 1959-04-30
CH362122A (en) 1962-05-31

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