Power failure rescue method for sync motor driven lift

Abstract

The power failure rescue method for sync motor driven lift includes: detecting power source with a power source detector, entering to the power failure mode by means of program or peripheral switch setting after detecting power failure, switching to the spare power source for providing the controller with power source while short-circuiting the winding of the sync motor with an interlocking contactor; entering to the power failure rescue function and blocking outer power source; performing corresponding operations of loosening mechanical brake for the cage to move slowly to the heaver side until reaching to the door opening area and opening the door. The present invention can disperse passengers safely from lift in the case of power failure.

Description

Technical field [0001] The invention relates to an elevator rescue method, in particular to a power failure rescue method of a synchronous motor driven elevator, which automatically executes emergency rescue when the elevator is trapped due to power failure. Background technique [0002] The elevator rescue emergency method is used to analyze and judge when the elevator is trapped, control the backup power supply, and make the elevator go to the nearest floor to open the car door and rescue passengers. In the prior art, in order to rescue passengers in time when the elevator is trapped, people have designed various elevator trapped elevator emergency devices, some of which can only alarm but not self-rescue, and are suitable for elevator control lines composed of simple discrete components. , There is nothing to do with PC ladders and large-scale integrated circuits. [0003] Chinese Patent 90107478 discloses an "Elevator Failure and Stop Level Stratum Method and Equipment", whic...

AI Technical Summary

Problems solved by technology

There are two main power failure rescue methods currently in use: one is to use a high-power backup power supply and an additional rescue control system to drive the elevator to the door opening area. The disadvantage of this solution is that it needs to match a high-power backup power supply, which is expensive. The control is complex, and the additional rescue control system and drive system are not coordinated as a whole to participate in the entire control process, and the reliability and integrity of the rescue function cannot be fully guaranteed

Another method is to use a low-power backup power supply to turn on the mechanical brakes to allow the car to move freely. When the load is in balance, human participation is required, and it is impossible to achieve complete automatic evacuation of passengers, which has potential safety hazards.

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