GB610382A - Improvements relating to electric motor controlling systems - Google Patents
Improvements relating to electric motor controlling systemsInfo
- Publication number
- GB610382A GB610382A GB1033146A GB1033146A GB610382A GB 610382 A GB610382 A GB 610382A GB 1033146 A GB1033146 A GB 1033146A GB 1033146 A GB1033146 A GB 1033146A GB 610382 A GB610382 A GB 610382A
- Authority
- GB
- United Kingdom
- Prior art keywords
- winding
- motor
- rectifier
- stator
- changer
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
- Control Of Multiple Motors (AREA)
Abstract
610,382. Control of A.C. motors. WADKIN, Ltd., and SIMS, W. L. April 3, 1946, No. 10331. [Class 38 (iii)] A three-phase induction motor providing an intermittently operating drive for a machine tool such as a wood moulding cutter is arranged for D.C. injection braking by supplying the motor through a continuously energized rotary frequency-changer which has a winding or windings arranged to form the primary of a step-down transformer feeding a rectifier through switching means adapted to operate to break the A.C. supply to the induction motor stator and connect the rectifier thereto. In the example, a 50-cycle supply from lines 2-4 is converted to 125 cycles by a motor-driven frequency-changer comprising a delta connected motor winding 1, star-connected exciter winding 5 and a star-connected rotor 6 which, in the driving position is connected over contacts j-r, l-o and k-t of a switch 7 to the deltaconnected stator winding 8 of the motor driving a cutter. In the braking position of the switch 7, the driving contacts are opened and contacts h-o, y-p and x-q are closed, .thereby connecting a bridge-connected rectifier 9 across both the star point G of the exciter winding and a tapping H adjacent thereto on the section F-G of the winding. Simultaneously, the rectifier output terminals P, Q are connected across the section R, T of the motor stator 8. The tapped portion HG of the winding FG of the frequency-changer forms the secondary winding of a step-down auto-transformer. In a modification, Fig. 3 (not shown), similar tappings are taken from each of the starconnected stator windings of the frequencychanger and the control switch is adapted to connect them to a three-phase metal rectifier when set to the braking position.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1033146A GB610382A (en) | 1946-04-03 | 1946-04-03 | Improvements relating to electric motor controlling systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1033146A GB610382A (en) | 1946-04-03 | 1946-04-03 | Improvements relating to electric motor controlling systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB610382A true GB610382A (en) | 1948-10-14 |
Family
ID=9965887
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1033146A Expired GB610382A (en) | 1946-04-03 | 1946-04-03 | Improvements relating to electric motor controlling systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB610382A (en) |
-
1946
- 1946-04-03 GB GB1033146A patent/GB610382A/en not_active Expired
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