Design of Permanent Magnet Damper for Elevator

摘要

With the continuous improvement of living standards, people have put forward higher requirements for the reliability and safety of elevators. An elevator damper based on the permanent magnetic field is designed, which uses the magnetic field motion to form an eddy current on the surface of the conductor (Cu), thereby decelerate the car in elevators, and the isotropic permanent magnet supports the weight of the car. In this paper, the effects of falling speed, magnetic field strength, magnetic field distribution on deceleration time and deceleration distance are analyzed, and the fact of magnet spring also studied. The results have shown the eddy current generated by the permanent magnetic field on the surface of the conductor can effectively achieve the deceleration of the elevator. The combination of a heterotrophic magnetic field and a discontinuous conductor can achieve the best deceleration time and distance. The deceleration time is proportional to the entry speed. The higher the speed, the stronger the eddy current field generated, the greater the impact, and the longer the deceleration time. After the speed is reduced to a minimum, the bottom permanent magnet spring can effectively support the weight of the entire car.