GB519114A - Improvements in or relating to electric motor controllers - Google Patents
Improvements in or relating to electric motor controllersInfo
- Publication number
- GB519114A GB519114A GB2401338A GB2401338A GB519114A GB 519114 A GB519114 A GB 519114A GB 2401338 A GB2401338 A GB 2401338A GB 2401338 A GB2401338 A GB 2401338A GB 519114 A GB519114 A GB 519114A
- Authority
- GB
- United Kingdom
- Prior art keywords
- field
- contactor
- resistances
- during
- series
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Stopping Of Electric Motors (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
519,114. Control of D.C. motors. WEST & CO., Ltd., A., and DAVID, O. T. Aug. 15, 1938, No. 24013. [Class 38 (iii)] The shunt field 3 of a motor 1 is not strengthened to its full value during return of the controller to the "off" position and thereby regenerative action is prevented, although the field 3 is so strong as to overpower the series field 2 during rheostatic braking During forward movement of the controller, resistances R1, R2, R3, R4 are successively shorted there being an intermediate stage when R1, R2, R3 are all in parallel and in series with R4, thereafter R6, R7, R8 are successively inserted and finally contactor C8 opened. During return movement, normally closed contactors C5, C6 are maintained energized by holding contacts thereon until the "off" position is reached, and thus resistances R6, R7 are kept in circuit with the field 3. During rheostatic braking, resistances R2, R3, R4 are in circuit with the armature and series field 2, and the field 3 is excited strongly with contactor C6 closed or fully with contactor C5 closed. The opposition between the fields gives a braking effort/speed characteristic with a maximum at a predetermined speed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2401338A GB519114A (en) | 1938-08-15 | 1938-08-15 | Improvements in or relating to electric motor controllers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2401338A GB519114A (en) | 1938-08-15 | 1938-08-15 | Improvements in or relating to electric motor controllers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB519114A true GB519114A (en) | 1940-03-18 |
Family
ID=10204975
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2401338A Expired GB519114A (en) | 1938-08-15 | 1938-08-15 | Improvements in or relating to electric motor controllers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB519114A (en) |
-
1938
- 1938-08-15 GB GB2401338A patent/GB519114A/en not_active Expired
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