GB537739A - Improvements in and relating to electric motor control systems - Google Patents
Improvements in and relating to electric motor control systemsInfo
- Publication number
- GB537739A GB537739A GB56/40A GB5640A GB537739A GB 537739 A GB537739 A GB 537739A GB 56/40 A GB56/40 A GB 56/40A GB 5640 A GB5640 A GB 5640A GB 537739 A GB537739 A GB 537739A
- Authority
- GB
- United Kingdom
- Prior art keywords
- braking
- loop
- motors
- field
- relay
- 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
- H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
- H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
- H02P3/08—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing a dc motor
- H02P3/10—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing a dc motor by reversal of supply connections
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Stopping Of Electric Motors (AREA)
- Braking Systems And Boosters (AREA)
Abstract
537,739. Control of D.C. motors. BRITISH THOMSON-HOUSTON CO., Ltd. Jan. 1, 1940, No. 56. Convention date, Dec. 30, 1938. [Class 38 (iii)] Traction motors have a dynamic braking circuit prepared during coasting. Upon return of the accelerating controller to " off switch LB1 and LB2 open and switch B closes, thus completing a braking loop through resistances 19, 21 and energization of the field 16, 17 from a battery 53. The voltage across part of the resistance 21 is applied to coil 44 of a relay 46 and thus controls coil 47 operating the fluid valve of device 27 which adjusts resistance 19 so as to obtain a low current in the braking loop. When the current in the loop reaches a predetermined value, the relay 46 engages its upper contact and causes field shunting contactors FS3 and FS4 to close. The motors continue to coast with fields partly excited and a small current in the braking loop. Operation of a braking controller then causes contactors FS3 and FS4 to open and give full field for dynamic braking. Specifications 514,005 and 514,263 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US537739XA | 1938-12-30 | 1938-12-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB537739A true GB537739A (en) | 1941-07-04 |
Family
ID=21986431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB56/40A Expired GB537739A (en) | 1938-12-30 | 1940-01-01 | Improvements in and relating to electric motor control systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB537739A (en) |
-
1940
- 1940-01-01 GB GB56/40A patent/GB537739A/en not_active Expired
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