GB648171A - Improvements in or relating to braking systems for alternating current motors - Google Patents
Improvements in or relating to braking systems for alternating current motorsInfo
- Publication number
- GB648171A GB648171A GB31889/48A GB3188948A GB648171A GB 648171 A GB648171 A GB 648171A GB 31889/48 A GB31889/48 A GB 31889/48A GB 3188948 A GB3188948 A GB 3188948A GB 648171 A GB648171 A GB 648171A
- Authority
- GB
- United Kingdom
- Prior art keywords
- motor
- winding
- rectifier
- contact
- capacitor
- 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
- H02P3/18—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 an ac motor
- H02P3/24—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 an ac motor by applying dc to the motor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Stopping Of Electric Motors (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
648,171. Control of A.C. motors. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. Dec. 9, 1948, No. 31889. Convention date, Jan. 15. [Class 38(iii)] A control system for braking an alternating-current motor M comprises a transformer 10 having low voltage terminals connected across two line-terminals of the motor, and having high-voltage terminals connected to a capacitor 12 in series with a rectifier 13, a switch 5 being provided for automatically short-circulating the rectifier when the motor is disconnected from its power-supply. When a push-button 7 is actuated, a contactor C is energized to start the motor, a contact 6 being closed to establish a self-holding circuit. The contact 5 opens to remove a short-circuit from the rectifier 13 and the capacitor 12 is charged at a high voltage from transformer secondary winding 11. When a push-button 8 is depressed to disconnect the motor, the contact 5 closes, the capacitor discharging through a winding 11. A current-impulse is induced in the primary winding 9 and is applied to the motor which is rapidly braked. The winding 11 may be tapped for adjustment of the braking-effect.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US648171XA | 1948-01-15 | 1948-01-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB648171A true GB648171A (en) | 1950-12-28 |
Family
ID=22058434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB31889/48A Expired GB648171A (en) | 1948-01-15 | 1948-12-09 | Improvements in or relating to braking systems for alternating current motors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB648171A (en) |
-
1948
- 1948-12-09 GB GB31889/48A patent/GB648171A/en not_active Expired
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