GB303259A - Improvements in or relating to methods of and apparatus for starting squirrel cage motors - Google Patents
Improvements in or relating to methods of and apparatus for starting squirrel cage motorsInfo
- Publication number
- GB303259A GB303259A GB3258927A GB3258927A GB303259A GB 303259 A GB303259 A GB 303259A GB 3258927 A GB3258927 A GB 3258927A GB 3258927 A GB3258927 A GB 3258927A GB 303259 A GB303259 A GB 303259A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistance
- phases
- coils
- energized
- squirrel cage
- 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
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/26—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor
- H02P1/28—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor by progressive increase of voltage applied to primary circuit of motor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor And Converter Starters (AREA)
Abstract
303,259. Smith, F. Dec. 2, 1927. Alternating-current motors.-A squirrel cage induction motor of three or more phases is started by energizing two or more, but not all, of its phases and subsequently energizing the remaining phase or phases. Additional steps may be obtained by decreasing a resistance in one or more of the phases. The application to a 3-phase motor without resistance steps is shown in Fig. 1 in which power is brought to the terminals 17 of a starter connected, as shown, to the stator coils 10, 11, 12. In the first bridging position 1 of the switch contacts the coils 10, 11 are energized and in the bridging position 2 the third coil 12 is also energized. In the form shown in Fig. 2, a resistance 20 is included in the switch line from the junction of coils 10, 11. In the bridging position 1 of the switch, coils 10 and 11 are energized through the resistance; in position 2 the winding 12 is energibed in addition; and in position 3 the resistance is cut out, giving full motor speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3258927A GB303259A (en) | 1927-12-02 | 1927-12-02 | Improvements in or relating to methods of and apparatus for starting squirrel cage motors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3258927A GB303259A (en) | 1927-12-02 | 1927-12-02 | Improvements in or relating to methods of and apparatus for starting squirrel cage motors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB303259A true GB303259A (en) | 1929-01-03 |
Family
ID=10340977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3258927A Expired GB303259A (en) | 1927-12-02 | 1927-12-02 | Improvements in or relating to methods of and apparatus for starting squirrel cage motors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB303259A (en) |
-
1927
- 1927-12-02 GB GB3258927A patent/GB303259A/en not_active Expired
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