GB676507A - Improvements in control systems for asynchronous motors - Google Patents
Improvements in control systems for asynchronous motorsInfo
- Publication number
- GB676507A GB676507A GB3787/51A GB378751A GB676507A GB 676507 A GB676507 A GB 676507A GB 3787/51 A GB3787/51 A GB 3787/51A GB 378751 A GB378751 A GB 378751A GB 676507 A GB676507 A GB 676507A
- Authority
- GB
- United Kingdom
- Prior art keywords
- motor
- winding
- control
- reactor
- rectifier
- 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
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
- H02P25/28—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring using magnetic devices with controllable degree of saturation, e.g. transductors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Multiple Motors (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
676,507. Control of A.C. motors. ALLMANNA SVENSKA ELEKTRISKA AKTIEBOLAGET. Feb. 16, 1951.. [Feb. 22, 1950] No. 3787/51. Class 38 (iii). In order that the speed of an asynchronous motor 3 may be rendered substantially independent of the load theA.C. coils of a saturable reactor 1 are connected in the primary circuit of the motor. One D.C. control winding 7 of the reactor is energised in accordance with the motor primary current through current transformer 4 and rectifier 6 the other reactor control winding 11 being excited proportionately to the motor primary voltage through rectifier 9. The winding 11 is arranged so that its magnetic field opposes that of the winding 7. Adjustable regulating resistors 8, 10, (one of which can be omitted) may be provided. In Fig. 3 (not shown) the motor rotor winding is connected to a control winding of the reactor through a rectifier and series and parallel regulating resistors, so that the control winding is energized in accordance with the motor secondary current. An increase of motor torque produces larger primary and secondary currents together with increased excitation of the winding 7, so that a higher voltage is applied to the motor whereupon the ampere-turns of the windings 7, 11, are re-balanced, the speed of the motor remaining substantially unchanged over a wide range. The set speed may be adjusted by means of the variable resistors in the circuits of the control windings of the reactors.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE676507X | 1950-02-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB676507A true GB676507A (en) | 1952-07-30 |
Family
ID=20314774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3787/51A Expired GB676507A (en) | 1950-02-22 | 1951-02-16 | Improvements in control systems for asynchronous motors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB676507A (en) |
-
1951
- 1951-02-16 GB GB3787/51A patent/GB676507A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2571708A (en) | Reversing magnetic amplifier control system | |
| GB638381A (en) | Transductor with internal self-magnetisation and with additional self-magnetisation | |
| US2482101A (en) | Control system | |
| US2335874A (en) | Electric frequency changing system | |
| US2550569A (en) | Control system for three-phase motors | |
| GB676507A (en) | Improvements in control systems for asynchronous motors | |
| US2588155A (en) | Rectifier connection | |
| US3032699A (en) | Excitation limiting device for static exciter-regulator systems | |
| GB571851A (en) | Means for regulating a machine voltage | |
| US1874240A (en) | Electrical circuit regulator | |
| US2716726A (en) | Electric motor control device | |
| US2202711A (en) | Electric valve converting system | |
| US2451958A (en) | Control system for synchronous machines | |
| GB1080465A (en) | Electrical responsive controls | |
| US2817051A (en) | Induction motor control systems | |
| US2709234A (en) | Electric motor speed control system | |
| US3077556A (en) | Electric drive | |
| GB549318A (en) | Improvements in current limiting arrangements for shunt motors | |
| GB413278A (en) | Means for speed regulation of mechanically co-operating electric motors | |
| GB571031A (en) | Means for connecting loads to polyphase networks alternatively in different phase sequence | |
| US3316480A (en) | System for controlling the time constant of a shunt field | |
| US2921248A (en) | Motor control system | |
| GB810119A (en) | Improvements relating to the control of electric motors | |
| GB600888A (en) | Means for modifying abrupt voltage changes in electric arc or discharge converter valves | |
| GB638099A (en) | Electric regulator with self-magnetized transductor |