Brief description of the national phase of positioning of an elevator has alternating current

摘要

The invention relates to a national phase of positioning of an elevator has alternating current. / p & & p & the current has one or several phases of the motor 2 for driving the elevator is interrupted by a controllable switch element 22. The control is effected by a control unit 23 which receives information on the speed real of the elevator shaft 8, forming a control loop connected a retroaction which communicates with the elevator shaft in the adjustment for a national, a low speed, making it possible to lift cage to discontinue at the level of the floor of the stage in the range of tolerance required. p / p applications: construction of the elevators and rises -.