GB171904A - Improvements in and relating to electric motor control systems - Google Patents
Improvements in and relating to electric motor control systemsInfo
- Publication number
- GB171904A GB171904A GB3364920A GB3364920A GB171904A GB 171904 A GB171904 A GB 171904A GB 3364920 A GB3364920 A GB 3364920A GB 3364920 A GB3364920 A GB 3364920A GB 171904 A GB171904 A GB 171904A
- Authority
- GB
- United Kingdom
- Prior art keywords
- winding
- resistance
- circuit
- controller
- motor
- 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
- 238000004804 winding Methods 0.000 abstract 7
- 230000003247 decreasing effect Effects 0.000 abstract 1
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
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/02—Details of starting control
- H02P1/022—Security devices, e.g. correct phase sequencing
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Power Engineering (AREA)
- Stopping Of Electric Motors (AREA)
- Control Of Direct Current Motors (AREA)
- Control And Safety Of Cranes (AREA)
Abstract
171,904. British Thomson - Houston Co., Ltd., (General Electric Co.). Nov. 29, 1920. Systems fcr continuous-current motors only.- The sequence of varying resistance in the armature circuit, as in the lowering operation of a hoist motor, provides for the temporary inclusion of an additional resistance by the action of an electromagnetic switch having two windings 13, 19. During lowering, which corresponds to the right-hand set of controller contacts, the winding 13 is energized when the controller reaches an intermediate position, and a short-circuit is opened around a resistance R<3>, which is thus included in the circuit of the motor-armature A. The winding 13 is de-energized by the further advance of the controller, but the contact 12 is held open by a winding 19 composed of two branches connected to contacts 17, 18 of a relay 15 subject to the counter electromotive force of the motor. Whether this is increasing or decreasing, the relay responds after a definite change, depending on the adjustment of the winding, and, in responding, momentarily breaks the circuit of the active branch of the winding 19. The contact 12 then closes again and the resistance R<3> is short-circuited. The arrangement shown is an improvement on that described in Specification 113,473, and comprises a field winding F, connected in series for hoisting and in shunt for lowering an electromagnetic brake B, which is applied when its coil is de-energized, a lock-out switch 10 controlling an initial resistance R', and a resistance R<2> adapted to be connected with the motor armature and field in a closed loop when the controller is in the off position.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3364920A GB171904A (en) | 1920-11-29 | 1920-11-29 | Improvements in and relating to electric motor control systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3364920A GB171904A (en) | 1920-11-29 | 1920-11-29 | Improvements in and relating to electric motor control systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB171904A true GB171904A (en) | 1921-12-01 |
Family
ID=10355642
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3364920A Expired GB171904A (en) | 1920-11-29 | 1920-11-29 | Improvements in and relating to electric motor control systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB171904A (en) |
-
1920
- 1920-11-29 GB GB3364920A patent/GB171904A/en not_active Expired
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