Magnetic suspension vacuum pump

The utility model belongs to the field of magnetic suspension bearing application, and particularly relates to a magnetic suspension vacuum pump. Comprising a cabinet, a permanent magnet synchronous motor, an impeller, an impeller cover, a volute, a frequency converter, a control system, a magnetic bearing controller, an air inlet pipe and an air outlet pipe, the permanent magnet synchronous motor is installed in the cabinet and is in driving connection with the impeller, and the impeller cover and the volute are installed on the permanent magnet synchronous motor; the frequency converter, the control system and the magnetic bearing controller are mounted in the cabinet; the air inlet pipe is mounted on the cabinet, and the output end of the air inlet pipe is opposite to the impeller; the air outlet pipe is installed on the machine cabinet, the input end of the air outlet pipe is opposite to the leading-out air cavity of the volute, and the output end of the air outlet pipe is communicated with the outside. C