1、电动马达产生高噪音的原因主要有电动机转子弯曲、磨损严重或轴承损坏，导致电动马达扫膛，产生噪音；电动马达冷却风扇损坏或固定不牢固产生高噪音；电动马达固定不牢固，也能引起震动，产生高噪音。
Lift manufacturers analysis of electric motors have a major reason for the high noise of a motor rotor bending, severe wear or bearing damage, resulting in electric motors sweep chamber, generating noise; an electric motor cooling fan is damaged or not firmly fixed to produce high noise; an electric motor is not firmly fixed, can cause vibration, resulting in high noise.

2、介绍交流接触器也能产生高噪音，当电源电压低于额定电压的85%、接触器E形铁芯的短路环折断、磁轭与衔铁的接触面歪斜、有灰尘或生锈接触不好时都会导致接触器产生嗡嗡的噪音。
Lift manufacturers introduce AC contactors can also produce high noise, when the supply voltage is less than 85% of rated voltage, short contact E-shaped core of the ring to break the yoke of skewed armature contact surface, there is no contact with dust or rust Hershey will result in contact produces a buzzing noise.

3、谈到电磁换向阀电磁线圈固定不牢固，衔铁频繁的分开和吸合也能产生高噪音。
Speaking solenoid valve lift manufacturers analysis is not firmly fixed solenoid armature frequent and pull apart can also produce high noise.