GB447549A - Improvements in or relating to electric control arrangements for use in electric lifts and like installations - Google Patents
Improvements in or relating to electric control arrangements for use in electric lifts and like installationsInfo
- Publication number
- GB447549A GB447549A GB3363634A GB3363634A GB447549A GB 447549 A GB447549 A GB 447549A GB 3363634 A GB3363634 A GB 3363634A GB 3363634 A GB3363634 A GB 3363634A GB 447549 A GB447549 A GB 447549A
- Authority
- GB
- United Kingdom
- Prior art keywords
- generator
- motor
- resistances
- relay
- resistance
- 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)
- Electric Propulsion And Braking For Vehicles (AREA)
- Stopping Of Electric Motors (AREA)
Abstract
447,549. Control of A.C. motors. HALL, Ltd., J. & E., 10, St. Swithin's Lane, and READ, A. A., 86, Blackheath Hill, both in London. Nov. 22, 1934, No. 33636. [Class 38 (iii)] Non-regenerative braking.-A control system for a lift motor 1, 2, comprises means for inserting slowing down resistances 6, 7, 8 in the motor circuit, a generator 11 coupled to the motor, a variable resistance 16 connected across the generator, and a relay 14 which operates to prevent further variation of the motor or generator resistances when the generator speed falls to a predetermined value. The resistance 16 is varied in accordance with the generator speed to increase the load on the generator after the resistances 6, 7, 8 have been adjusted to their lowest speed values. The slowing down adjustment of the resistances may be initiated by movement of a controller to a slow speed position, or by operation of a ramp provided for floor finding purposes. The resistances 6, 7, 8 and 16 may be adjusted by solenoids, the circuit of one solenoid being connected by movement of the core of the other to the limit of its travel. In a modification, Fig. 2 (not shown), the generator 11 is compounded and supplies, through contacts of a relay connected across the generator, a pilot motor adjusting the resistance 16. In this arrangement the variation of the resistances 6, 7, 8 is not subject to the control of a relay responsive to generator voltage, and the connection of the resistance 16 and the pilot motor to the generator includes the contacts of a relay under the control of the controller. For final stoppage the controller is arranged to disconnect the motor and energize a relay which connects a resistance across the generator for dynamic braking. The separately excited fields of the generator and pilot motor are energized from the supply through a rectifier. Specification 172,122, [Class 38 (iii)], is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3363634A GB447549A (en) | 1934-11-22 | 1934-11-22 | Improvements in or relating to electric control arrangements for use in electric lifts and like installations |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3363634A GB447549A (en) | 1934-11-22 | 1934-11-22 | Improvements in or relating to electric control arrangements for use in electric lifts and like installations |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB447549A true GB447549A (en) | 1936-05-21 |
Family
ID=10355471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3363634A Expired GB447549A (en) | 1934-11-22 | 1934-11-22 | Improvements in or relating to electric control arrangements for use in electric lifts and like installations |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB447549A (en) |
-
1934
- 1934-11-22 GB GB3363634A patent/GB447549A/en not_active Expired
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