GB869613A - Improvements in and relating to a.c. motor control systems - Google Patents

Improvements in and relating to a.c. motor control systems

Info

Publication number
GB869613A
GB869613A GB8987/58A GB898758A GB869613A GB 869613 A GB869613 A GB 869613A GB 8987/58 A GB8987/58 A GB 8987/58A GB 898758 A GB898758 A GB 898758A GB 869613 A GB869613 A GB 869613A
Authority
GB
United Kingdom
Prior art keywords
motor
amplifier
alternators
speed
field winding
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
GB8987/58A
Inventor
Duncan Maclachlan
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries 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
Priority to DEM40877A priority Critical patent/DE1149795B/en
Application filed by Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB8987/58A priority patent/GB869613A/en
Publication of GB869613A publication Critical patent/GB869613A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G05D3/1445—Control of position or direction using feedback using an analogue comparing device with a plurality of loops

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Multiple Motors (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

869,613. Control of A.C. motors. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. April 2, 1959 [March 20, 1958], No. 8987/58. Class 38 (3). [Also in Group XXXVIII] The control and reference phase windings 3, 8 of a servomotor 1 are supplied from separate alternators 5, 10 having their field windings 6 11, supplied from an amplifier 7. The field winding 11 is connected to a full-wave rectifier 12 whereby the current in the field winding 6 reverses but that in the field winding 11 does not when the D.C. output of the amplifier reverses. The alternators are both driven by a single motor, the output windings 4, 9 being arranged to provide voltages which are phase-displaced by 90 degrees. The amplifier may have an input error signal representing the difference between the desired position or speed and the actual position or speed of the load driven by the servomotor, the motor being adjusted to remove such difference. As shown, the system is used for position control and stabilizing signals dependent on the motor speed and voltage are fed back to the amplifier. The motor may have a squirrel cage or solid iron rotor. Alternatively, the motor has a wound rotor, the impedance in the rotor circuit being controlled in conjunction with the excitation of the alternators.
GB8987/58A 1958-03-20 1959-03-20 Improvements in and relating to a.c. motor control systems Expired GB869613A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DEM40877A DE1149795B (en) 1958-03-20 1959-03-19 Arrangement for controlling the speed and direction of rotation of a two-phase induction motor
GB8987/58A GB869613A (en) 1958-03-20 1959-03-20 Improvements in and relating to a.c. motor control systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1149795X 1958-03-20
GB8987/58A GB869613A (en) 1958-03-20 1959-03-20 Improvements in and relating to a.c. motor control systems

Publications (1)

Publication Number Publication Date
GB869613A true GB869613A (en) 1961-05-31

Family

ID=26242556

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8987/58A Expired GB869613A (en) 1958-03-20 1959-03-20 Improvements in and relating to a.c. motor control systems

Country Status (2)

Country Link
DE (1) DE1149795B (en)
GB (1) GB869613A (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2683845A (en) * 1953-07-23 1954-07-13 Us Navy Damping circuit for magnetic servo amplifiers
US2729777A (en) * 1954-11-12 1956-01-03 North American Aviation Inc Magnetic amplifier circuit for motor

Also Published As

Publication number Publication date
DE1149795B (en) 1963-06-06

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