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简述了VVVF电梯的控制机理,发现电梯错相后检修状态下,一特殊现象会造成事故,以及在此状态下的检验要求。
The control mechanism of the VVVF elevator is briefly described. It is found that a special phenomenon will cause an accident and the inspection requirements in this state when the elevator is in the wrong state after overhauling.