GB717606A - Improvements in or relating to electric motor control systems - Google Patents

Improvements in or relating to electric motor control systems

Info

Publication number
GB717606A
GB717606A GB439052A GB439052A GB717606A GB 717606 A GB717606 A GB 717606A GB 439052 A GB439052 A GB 439052A GB 439052 A GB439052 A GB 439052A GB 717606 A GB717606 A GB 717606A
Authority
GB
United Kingdom
Prior art keywords
circuit
field
exciter
speed
control
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
GB439052A
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB439052A priority Critical patent/GB717606A/en
Publication of GB717606A publication Critical patent/GB717606A/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
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/06—Arrangements 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
    • H02P7/18—Arrangements 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
    • H02P7/34—Arrangements 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

717,606. Control of D.C. motors. GENERAL ELECTRIC CO., Ltd., and FRIEDLANDER. E. S. Jan. 14, 1953 [Feb. 19, 1952]. No. 4390/52. Class 38(3) [Also in Group XXXV] In a speed control system for a Ward-Leonard drive the shunt field 11 of the generator 10 is controlled by a series exciter 13 having its fields 15, 16 energized through saturable reactors 28, 29 in accordance with the motor voltage (speed) and a reference voltage derived from a potentiometer 33. A resistance 12 in the field circuit limits the shunt excitation for zero exciter output so that the generator is unstable and can easily be controlled by small outputs from the exciter. Other features: (i) current limiting during alteration of set speed is provided by exciter field 14 in series with the main generator circuit, (ii) reversing initiated by switch 32 in the exciter speed control field circuit; polarized relay 26 reverses reference field when the motor direction actually changes (iii) feedback provided by second control windings 28b, 29b interconnecting the saturable reactors to provide desired motor characteristics (iv) rate of change of speed is limited by a small flywheel motor 36 (or a large capacitor) connected across a resistor 35 in the circuit of the speed control field 15. (v) The Specification states that instead of a saturable reactor in the reference circuit, the control-field-circuit saturable reactor may be supplied through a Boucherot circuit having a controllable A.C. input to give the desired speed setting.
GB439052A 1952-02-19 1952-02-19 Improvements in or relating to electric motor control systems Expired GB717606A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB439052A GB717606A (en) 1952-02-19 1952-02-19 Improvements in or relating to electric motor control systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB439052A GB717606A (en) 1952-02-19 1952-02-19 Improvements in or relating to electric motor control systems

Publications (1)

Publication Number Publication Date
GB717606A true GB717606A (en) 1954-10-27

Family

ID=9776259

Family Applications (1)

Application Number Title Priority Date Filing Date
GB439052A Expired GB717606A (en) 1952-02-19 1952-02-19 Improvements in or relating to electric motor control systems

Country Status (1)

Country Link
GB (1) GB717606A (en)

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