GB929357A - Improvements in control gear for a.c. commutator motors - Google Patents
Improvements in control gear for a.c. commutator motorsInfo
- Publication number
- GB929357A GB929357A GB438961A GB438961A GB929357A GB 929357 A GB929357 A GB 929357A GB 438961 A GB438961 A GB 438961A GB 438961 A GB438961 A GB 438961A GB 929357 A GB929357 A GB 929357A
- Authority
- GB
- United Kingdom
- Prior art keywords
- motor
- speed
- commutator motor
- load current
- commutator
- 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
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
- H02P25/10—Commutator motors, e.g. repulsion motors
- H02P25/12—Commutator motors, e.g. repulsion motors with shiftable brushes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Motor Or Generator Current Collectors (AREA)
Abstract
929,357. Control of A.C. motors. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Feb. 1, 1962 [Feb. 6, 1961], No. 4389/61. Drawings to Specification. Class 38 (3). The speed of a three-phase commutator motor is controlled in stepped relation by means of a pilot motor which is coupled to the brushgear and is associated with a drum controller having the same number of operating positions as the desired speeds of the commutator motor. A limit switch is engageable by the brush-gear for each desired speed of operation, and, except at the lowest speed, the final movement of the brush-gear before it is brought to rest is in the speed-increasing direction. The drum controller has duplicate operating positions for reversible operation of the commutator motor. The pilot motor is reversed if the controller is switched from one operating position to a second and then returned to the first position before the limit switch corresponding to the second position has been actuated. To prevent one or more of the operating speeds from being obtained if the load current of the commutator motor exceeds a given value, the coil of a relay is energized in accordance with the load current to de-energize the pilot motor when the load current reaches the given value. The commutator motor is braked mechanically immediately prior to the removal of the supply from the motor. Specification 409,485 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB438961A GB929357A (en) | 1961-02-06 | 1961-02-06 | Improvements in control gear for a.c. commutator motors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB438961A GB929357A (en) | 1961-02-06 | 1961-02-06 | Improvements in control gear for a.c. commutator motors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB929357A true GB929357A (en) | 1963-06-19 |
Family
ID=9776243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB438961A Expired GB929357A (en) | 1961-02-06 | 1961-02-06 | Improvements in control gear for a.c. commutator motors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB929357A (en) |
-
1961
- 1961-02-06 GB GB438961A patent/GB929357A/en not_active Expired
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