Dynamics Analysis of Elevator Winches with Thyristor Control System
摘要
An analysis of the features of the dynamic operating modes of a “traditional” elevator winch with a worm gearbox, a two-speed asynchronous motor, and a thyristor control system has been carried out. When operating a traditional geared elevator hoisting mechanism with a non-adjustable control system, the car acceleration values are 30–150% higher than the normalized values in the initial phases of starting and braking the lifting mechanism motor. When using an adjustable thyristor control system, the maximum acceleration values of a passenger elevator car in the start-up mode are 70–100% less than the maximum permissible values over the entire load range. Limiting not only the maximum acceleration value but also the jerk is possible. To do this, after turning on the winch motor, its torque must change according to an exponential law. The patterns for forming control actions to obtain standardized modes of a passenger elevator are universal for all elevator winches of “traditional design” with a worm gearbox, a two-speed asynchronous motor, and a thyristor control system.