Elevator safety control system and method

Abstract

The invention discloses an elevator safety control system and method, and relates to the technical field of elevators. The system comprises a safety signal acquisition module, a safety controller module and a brake loop control module; the first end of the safety controller module is connected with the safety signal acquisition module, and the second end of the safety controller module is connected with the brake loop control module; the safety controller module is used for generating an enable signal according to a safety signal output by the safety signal acquisition module, and transmittingthe enable signal to the brake loop control module; the brake loop control module is used for generating current according to the enable signal, so that an elevator brake is in the loosening state; and when a short circuit fault is detected, a fault signal is fed back to the safety controller module to trigger the safety controller module stops output of the enable signal, and the elevator brakeis in the released state. By means of the elevator safety control system and method, contactor action noise is avoided in the elevator operation process, and the riding experience is improved.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of elevators, in particular to an elevator safety control system and method. Background technique [0002] Usually, the normal stop or emergency stop of the elevator is realized by disconnecting the motor and brake circuit. Specifically, when the power supply to the motor is cut off or the drive waveform is canceled, the motor stops running, and the power supply to the brake circuit is disconnected, and the braking function is activated. That is, when the brake circuit is powered off, the electromagnetic force disappears, and under the action of spring pressure The shoe part quickly presses against the braking surface to form a brake that keeps the motor in a braking state. It can be seen that the stopping of the motor and the closing of the brake jointly ensure the safety of the elevator when it stops. [0003] At present, cutting off the power supply of the motor and the brake c...

AI Technical Summary

Problems solved by technology

Regardless of whether the elevator safety circuit is disconnected or the elevator main control system is disconnected, the contactor coil will be de-energized, the contactor contact will be de-energized, and the motor and brake circuit will be de-energized.

However, frequent on-off of the contactor will generate action noise, which will reduce the experience of taking the elevator. For example, in the application of machine room-less elevators and villa elevators, the action noise generated by the frequent on-off of the contactor will affect the elevator users and even disturb the residents around the elevator.

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