优异的噪声抑制能力；有效减少变频器电磁干扰；被广泛应用于变频器，电机驱动，电梯等设备。

Excellent noise rejection; Effectively reduce electromagnetic rence inverter; Been widely used in inverter motor drives, elevators other equipment.

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探讨了目前电梯门机系统存在的问题，提出了应用DSP数字信号处理技术为核心，无刷直流电机为驱动机的系统方案。

Discusses the problems existing in the door motor of elevator, puts forward the system project which takes DSP digital signal processing technology as core, DC brushless motor as driver.

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门电机担负着电梯门的动力驱动，若电机过热，会加速绝缘材料老化，缩短电机的使用寿命。

The elevator door was driven by door motor. If the motor was over heated, it would speed up the ageing of insulating material and shorten the life of the motor.

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