GB927824A - Improvements in or relating to control systems for electric motors - Google Patents
Improvements in or relating to control systems for electric motorsInfo
- Publication number
- GB927824A GB927824A GB1352761A GB1352761A GB927824A GB 927824 A GB927824 A GB 927824A GB 1352761 A GB1352761 A GB 1352761A GB 1352761 A GB1352761 A GB 1352761A GB 927824 A GB927824 A GB 927824A
- Authority
- GB
- United Kingdom
- Prior art keywords
- control
- potentiometer
- speed
- energized
- tapping
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
- B66B1/36—Means for stopping the cars, cages, or skips at predetermined levels
- B66B1/44—Means for stopping the cars, cages, or skips at predetermined levels and for taking account of disturbance factors, e.g. variation of load weight
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Computer Networks & Wireless Communication (AREA)
- Treating Waste Gases (AREA)
- Control Of Multiple Motors (AREA)
Abstract
927,824. Control of A.C. motors; controllers. GENERAL ELECTRIC CO. Ltd. March 23, 1962 [April 14, 1961], No. 13527/61. Class 38 (3). [Also in Group XXXV] A torque control device 2 for an induction motor 1 receives a signal from magnetic amplifiers 3, 4, having control windings 6, 7, energized in accordance with the set speed of the motor. Control windings 8, 9 are energized in response to the actual speed, the torque control signal derived from the output of the amplifiers corresponding to the difference between the speed signals in the absence of any bias. Potentiometer 13 is cam-adjusted to set the pattern speed according to the position of the load, this potentiometer being fed from induction regulator 16 the output of which depends on the setting of a control lever. Fine control at 1ow speeds is provided by saturable reactor 17. Load-compensation is afforded by biasing windings 10, 11, energized during deceleration in accordance with the loading at a predetermined point prior to the commencement of deceleration, a potentiometer 18 having an adjustable tapping 19 which is set automatically in dependence of the loading at that point. During acceleration and full speed operations of the motor, a fixed bias is derived from tapping 24 on potentiometer 18. For manual control, biasing signals are derived from a further fixed tapping 25. Specifications 740,257 and 803,224 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1352761A GB927824A (en) | 1961-04-14 | 1961-04-14 | Improvements in or relating to control systems for electric motors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1352761A GB927824A (en) | 1961-04-14 | 1961-04-14 | Improvements in or relating to control systems for electric motors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB927824A true GB927824A (en) | 1963-06-06 |
Family
ID=10024600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1352761A Expired GB927824A (en) | 1961-04-14 | 1961-04-14 | Improvements in or relating to control systems for electric motors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB927824A (en) |
-
1961
- 1961-04-14 GB GB1352761A patent/GB927824A/en not_active Expired
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