GB1003312A - Improvements in variable speed electric drives - Google Patents

Improvements in variable speed electric drives

Info

Publication number
GB1003312A
GB1003312A GB3727960A GB3727960A GB1003312A GB 1003312 A GB1003312 A GB 1003312A GB 3727960 A GB3727960 A GB 3727960A GB 3727960 A GB3727960 A GB 3727960A GB 1003312 A GB1003312 A GB 1003312A
Authority
GB
United Kingdom
Prior art keywords
winding
voltage
motor
generator
resistor
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
GB3727960A
Inventor
Anthony David Ryder
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.)
Wm Wadsworth & Sons Ltd
Original Assignee
Wm Wadsworth & Sons 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 Wm Wadsworth & Sons Ltd filed Critical Wm Wadsworth & Sons Ltd
Priority to GB3727960A priority Critical patent/GB1003312A/en
Publication of GB1003312A publication Critical patent/GB1003312A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P7/00Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/06Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
    • H02P7/18Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
    • H02P7/34Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using Ward-Leonard arrangements

Abstract

1,003,312. Control of D.C. motors. W. M. WADSWORTH & SONS Ltd. Sept. 18 1961 [Oct. 31 1960] No. 37279/60. Heading H2J. [Also in Division G3] In a Ward-Leonard system generator G has a main field winding MF and a correction winding CF which is energized in accordance with the error between the desired and actual speeds of motor M the motor speed being detected by tachometer generator TG or by means of a bridge circuit including the motor armature. The voltage developed across resistor R4 is fed back to amplifier B which supplies booster winding BF to compensate for resistive losses in the armature circuit. The voltage proportional to motor speed is differentiated and the rate-ofchange voltage fed back to amplifier C or to a separate amplifier to counteract any tendency to hunting. The voltage representing the desired speed may be obtained from a resistor in series with winding MF and a regulator resistance. Alternatively the reference voltage may be derived partly from said resistor and partly from a potentiometer across the regulating resistance. The field windings CF or BF may be centre-tapped and supplied from pushpull amplifiers. In another arrangement, the motor is supplied from two or more generators with their armatures connected in series. One main generator may carry the main field winding, a smaller generator carrying the auxiliary field windings. Specification 847,647 is referred to.
GB3727960A 1960-10-31 1960-10-31 Improvements in variable speed electric drives Expired GB1003312A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3727960A GB1003312A (en) 1960-10-31 1960-10-31 Improvements in variable speed electric drives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3727960A GB1003312A (en) 1960-10-31 1960-10-31 Improvements in variable speed electric drives

Publications (1)

Publication Number Publication Date
GB1003312A true GB1003312A (en) 1965-09-02

Family

ID=10395181

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3727960A Expired GB1003312A (en) 1960-10-31 1960-10-31 Improvements in variable speed electric drives

Country Status (1)

Country Link
GB (1) GB1003312A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2265475A (en) * 1992-03-18 1993-09-29 Yang Tai Her Dc motor-generator dynamic feedback control circuit
GB2269245A (en) * 1992-07-30 1994-02-02 Yang Tai Her DC Motor-Generator Dynamic Feedback Control Circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2265475A (en) * 1992-03-18 1993-09-29 Yang Tai Her Dc motor-generator dynamic feedback control circuit
GB2269245A (en) * 1992-07-30 1994-02-02 Yang Tai Her DC Motor-Generator Dynamic Feedback Control Circuit
GB2269245B (en) * 1992-07-30 1996-05-22 Yang Tai Her Feedback type motor-generator control circuit

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