The main points of the technical scheme are: Comprising a high voltage frequency conversion synchronous motor body, the bottom of the high voltage frequency conversion synchronous motor body is installed above the fixed seat.
The bottom of the fixed seat is provided with a support seat, the support seat is provided with a chute, the fixed seat along the vertical direction sliding connected in the chute, the fixed seat is provided with a number of sink holes at the bottom of the fixed seat, A damping spring is respectively fixed between the bottom of the countersunk hole and the top surface of the support seat, a guide hole is respectively provided with the bottom of the countersunk hole, the top surface of the support seat is fixed with a guide rod matched with the guide hole, the fixed seat is also arranged above the arc cover.
The arc cover is fixed with a first sound absorbing cotton layer on the arc surface close to the high voltage frequency conversion synchronous motor body: the motor is designed for noise reduction and shock absorption.