GB558914A - Improvements in or relating to electric motors - Google Patents
Improvements in or relating to electric motorsInfo
- Publication number
- GB558914A GB558914A GB6886/42A GB688642A GB558914A GB 558914 A GB558914 A GB 558914A GB 6886/42 A GB6886/42 A GB 6886/42A GB 688642 A GB688642 A GB 688642A GB 558914 A GB558914 A GB 558914A
- Authority
- GB
- United Kingdom
- Prior art keywords
- field
- series
- winding
- motor
- brake
- 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
- H02P7/03—Arrangements for regulating or controlling the speed or torque of electric DC motors for controlling the direction of rotation of DC motors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
558,914. Control of D.C. motors. MORRIS, E. H. May 20, 1942, No. 6886. [Class 38 (iii)] A motor 10 driving a load which may overrun in one direction, e.g. a blade-adjusting device of a variable pitch propeller, has two series fields 11, 12, one for each direction of rotation, controlled by a two-way switch 13, 14, 15, the contact 15 of which may be moved by an engine speed governor. During drive in the overrun direction, e.g. adjusting the propeller to fine pitch, the series winding 11 is energized and contactor 19, 21 converts the winding 12 into an aiding shunt field in series with a resistance 18 which may be an aiding auxiliary field winding of the motor. If the load overruns a braking current circulates in the field 12, and eventually the current in the field 11 drops to zero. whereupon contactor 19 opens, the motor thereupon ceases to develop a back E.M.F. and a brake coil 22 releases a spring-applied brake. The brake release coil 22 may be in series with the field 22.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB6886/42A GB558914A (en) | 1942-05-20 | 1942-05-20 | Improvements in or relating to electric motors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB6886/42A GB558914A (en) | 1942-05-20 | 1942-05-20 | Improvements in or relating to electric motors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB558914A true GB558914A (en) | 1944-01-27 |
Family
ID=9822583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6886/42A Expired GB558914A (en) | 1942-05-20 | 1942-05-20 | Improvements in or relating to electric motors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB558914A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1744444A1 (en) * | 2005-07-13 | 2007-01-17 | REpower Systems AG | Rotor blade pitch adjustment apparatus |
-
1942
- 1942-05-20 GB GB6886/42A patent/GB558914A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1744444A1 (en) * | 2005-07-13 | 2007-01-17 | REpower Systems AG | Rotor blade pitch adjustment apparatus |
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