Novel gas magnetic bearing electric spindle

The utility model discloses a novel gas magnetic bearing electric spindle, which comprises a radial-axial auxiliary bearing, a radial displacement sensor, a radial displacement sensor bracket, a radial hybrid magnetic bearing, a limiting sleeve, a high-speed motor, a steel sleeve, an axial thrust gas bearing, a radial auxiliary bearing, a rotating shaft, a front end cover and a rear end cover. By adoption of the structure of combining a static pressure gas bearing and a magnetic bearing, the traditional structure that an ultra-precise spindle is supported by independently employing the static pressure gas bearing or the magnetic bearing is broken through, wherein the defect that the magnetic bearing has low bearing force can be overcome through the static pressure gas bearing, the defect that the static pressure gas bearing is hardly controlled can be overcome through the magnetic bearing, and high rotating precision can be realized. By adoption of the hybrid magnetic bearing structure, the traditional supporting form of employing an active magnetic bearing is broken through, so the bias current is canceled, the ampere turns of an electromagnet can be reduced, the power consumption of a power amplifier is reduced, and the cost of a spindle system is reduced.