Symmetric drive method for DC motor in elevator door motor system

Abstract

The invention discloses a symmetric drive method for a DC motor in an elevator door motor system. An elevator continues to supply power to the DC motor after a door is opened or closed, gate signals of a switching component on an H bridge are converted to symmetric pulse signals with the duty ratio being 50%, and a rotation shaft of the motor is in a static state. Under the state, the torque direction of the rotation shaft of the DC motor is frequently and regularly switched between the forward direction and the backward direction, the motor is in the stalled state, and the stalled state can not be easily changed through external force. Due to the fact that when an elevator landing door is in an opened state and a closed state, the state of the landing door can not be changed by external force manually, the symmetric drive method meets the above requirements, and the reliability of the elevator landing door can be better guaranteed. When the motor is in the stalled state, only the inside resistance of the motor consumes energy, the energy loss is greatly reduced, the motor also has certain moment, and therefore the energy conservation performance of the elevator door motor system is improved.

Description

technical field [0001] The invention belongs to the technical field of motor control, and in particular relates to a symmetrical driving method of a DC motor used in an elevator door machine system. Background technique [0002] Due to its wide speed range, large overload capacity, good precision, excellent control performance, and the ability to achieve frequent quick start, brake and reverse, etc., DC motors are widely used in industries such as mining, transportation, and construction. The frequent opening and closing of the elevator door is just in line with the above advantages, so the DC motor is also widely used in the elevator door machine system. At present, the DC motor drive mode of the elevator door machine system is: in the process of opening and closing the door of the elevator, the DC motor runs forward and reverse; The torque is convenient for the next reverse movement, but it also consumes a lot of energy during this period, and the energy saving performanc...

AI Technical Summary

Problems solved by technology

At present, the DC motor drive mode of the elevator door machine system is: in the process of opening and closing the door of the elevator, the DC motor runs forward and reverse; Torque, which is convenient for reverse movement next time, but it also consumes a lot of energy during this period, and the energy saving performance is poor

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