GB516666A - Improvements in and relating to electric motor control systems - Google Patents
Improvements in and relating to electric motor control systemsInfo
- Publication number
- GB516666A GB516666A GB497738A GB497738A GB516666A GB 516666 A GB516666 A GB 516666A GB 497738 A GB497738 A GB 497738A GB 497738 A GB497738 A GB 497738A GB 516666 A GB516666 A GB 516666A
- Authority
- GB
- United Kingdom
- Prior art keywords
- low frequency
- contactor
- motor
- connection
- operated
- 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
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Stopping Of Electric Motors (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
516,666. Control of A.C. motors. BRITISH THOMSON-HOUSTON CO., Ltd., LIDDIARD, H. W. C., and PETCH, T. H. Feb. 15, 1939, No. 4977/38. [Class 38 (iii)] Braking.-In a haulage system in which means effect disconnection of the driving motor 1 from its source of normal frequency and connection to a source of low frequency when the cage is a predetermined distance from its checking level, variable resistance is inserted in the rotor circuit of the motor when the low frequency connection is made so that the braking torque ,can be regulated. For normal operation the appropriate reversing contactor 5 or 6 is operated, and an associated contactor 3 or 4 also operated to prepare the low frequency connection. Limit switches effect opening of the main contactor 5 or 6 and closure of a contactor 7 so that the motor is connected to the low frequency supply which may be given by a Scherbius type machine 2. Simultaneously resistance is inserted in the rotor circuit and cut out in steps. At the checking level a switch disconnects the motor and a brake is applied. Specification 512,237 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB497738A GB516666A (en) | 1939-02-15 | 1939-02-15 | Improvements in and relating to electric motor control systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB497738A GB516666A (en) | 1939-02-15 | 1939-02-15 | Improvements in and relating to electric motor control systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB516666A true GB516666A (en) | 1940-01-09 |
Family
ID=9787433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB497738A Expired GB516666A (en) | 1939-02-15 | 1939-02-15 | Improvements in and relating to electric motor control systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB516666A (en) |
-
1939
- 1939-02-15 GB GB497738A patent/GB516666A/en not_active Expired
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