GB677612A - Improvements relating to the dynamic braking of induction motors - Google Patents
Improvements relating to the dynamic braking of induction motorsInfo
- Publication number
- GB677612A GB677612A GB2687449A GB2687449A GB677612A GB 677612 A GB677612 A GB 677612A GB 2687449 A GB2687449 A GB 2687449A GB 2687449 A GB2687449 A GB 2687449A GB 677612 A GB677612 A GB 677612A
- Authority
- GB
- United Kingdom
- Prior art keywords
- exciter
- field
- winding
- current
- load
- 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)
- Control Of Multiple Motors (AREA)
Abstract
677,612. Control of A.C. motors. METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. Oct. 19, 1949. No. 26874/49. Class 38 (iii). An induction motor 1 is braked by connecting its stator winding through switch 3 to a directcurrent exciter 4, the motor rotor winding being connected to a load resistor 2. The ratio between the field current of the exciter 4 and the load current is maintained substantially constant by means of a balancing relay 10 having opposed windings 9, 11. The winding 11 is energized in accordance with the load current by means of current transformer 13 and rectifier 12. The winding 9 is connected across a resistor 8 which is placed, in series with the exciter field winding 7, across the armature of a pilot exciter 5. If the ratio between the load and field currents departs from a given value, the relay 10 is moved to energize a reversible control motor 14 and adjust resistor 15 in the field circuit of the pilot exciter in such manner that the ratio is restored to its pre-determined value. Currents proportional to the load current and to the exciter field current may be combined in opposition and the resultant signal applied to electronic apparatus or a voltage regulator controlling the field current of the exciter or of the pilot exciter. Specification 651,379 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2687449A GB677612A (en) | 1949-10-19 | 1949-10-19 | Improvements relating to the dynamic braking of induction motors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2687449A GB677612A (en) | 1949-10-19 | 1949-10-19 | Improvements relating to the dynamic braking of induction motors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB677612A true GB677612A (en) | 1952-08-20 |
Family
ID=10250576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2687449A Expired GB677612A (en) | 1949-10-19 | 1949-10-19 | Improvements relating to the dynamic braking of induction motors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB677612A (en) |
-
1949
- 1949-10-19 GB GB2687449A patent/GB677612A/en not_active Expired
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