GB693899A - Improvements in and relating to electric motor control systems - Google Patents
Improvements in and relating to electric motor control systemsInfo
- Publication number
- GB693899A GB693899A GB52450A GB52450A GB693899A GB 693899 A GB693899 A GB 693899A GB 52450 A GB52450 A GB 52450A GB 52450 A GB52450 A GB 52450A GB 693899 A GB693899 A GB 693899A
- Authority
- GB
- United Kingdom
- Prior art keywords
- winding
- motor
- machine
- exciter
- rectifier
- 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
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
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/10—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load
- H02P9/12—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load for demagnetising; for reducing effects of remanence; for preventing pole reversal
- H02P9/123—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load for demagnetising; for reducing effects of remanence; for preventing pole reversal for demagnetising; for reducing effects of remanence
Abstract
693,899. Exciting dynamo-electric machines. BRITISH THOMSON-HOUSTON CO., Ltd., and PECK, P. E. Jan. 2, 1951 [Jan. 9, 1950], No. 624/50. Class 35. [Also in Group XXXVII] The armature 1 of a D.C. motor is supplied from generator 3 having a field winding 4 energized by exciter 5 which is in turn excited by a quick-response machine such as an amplidyne 7. A control winding 8 of the machine 7 is supplied through reversing means and is arranged to provide considerably more than the required nett steady-state excitation of the machine. When the motor is being accelerated a differential field winding 9 counteracts the excess flux of the winding 8 until a state of balance is reached. In order to reduce the forcing of the generator and consequently the acceleration, but not the speed, of the motor if the load exceeds a given value, an additional winding 10 is provided for the machine 7. This winding is connected across the compole and compensating windings 11 (shown separately) in series with a portion of potentiometer 17, which is shunted across exciter 5, and a portion of reference potentiometer 12, so that a voltage proportional to the amount of forcing applied to the winding 4 is added to a voltage proportional to the load current, the sum of these voltages being matched with a reference vo tage to provide the required control effect. For forward operation contact 15 is closed so that, when the voltage across winding 11 exceeds a predetermined amount, a current passes through rectifier 13 and winding 10 to reduce the output of exciter 7 and the acceleration of the motor. The overload trip operates before the motor current increases sufficiently to reduce the voltage of the generator 3. During retardation rectifier 13 prevents energization of winding 10, and for reverse operation contact 16 and rectifier 14 are rendered effective. The winding 11 may be replaced by a resistive or resistive-inductive shunt. Specifications 547,613, [ Group XXXVII], 619,848 and 621,782 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB52450A GB693899A (en) | 1950-01-09 | 1950-01-09 | Improvements in and relating to electric motor control systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB52450A GB693899A (en) | 1950-01-09 | 1950-01-09 | Improvements in and relating to electric motor control systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB693899A true GB693899A (en) | 1953-07-08 |
Family
ID=9705874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB52450A Expired GB693899A (en) | 1950-01-09 | 1950-01-09 | Improvements in and relating to electric motor control systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB693899A (en) |
-
1950
- 1950-01-09 GB GB52450A patent/GB693899A/en not_active Expired
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