Abstract: A permanent magnet motor is provided, including: a stator and a rotor. The stator has a plurality of windings. The rotor has a plurality of magnet placement slots and a plurality of air gaps. The plurality of magnet placement slots include a plurality of circumferential magnet placement slots circumferentially arranged and a plurality of radial magnet placement slots radially extending. The circumferential magnet placement slots and the radial magnet placement slots are circumferentially alternately arranged. The plurality of air gaps are adjacent to part of the plurality of magnet placement slots and distributed to be on a d-axis flux path of the rotor.

Abstract: A permanent magnet motor is provided, including: a stator and a rotor. The stator has a plurality of windings. The rotor has a plurality of magnet placement slots and a plurality of air gaps. The plurality of magnet placement slots include a plurality of circumferential magnet placement slots circumferentially arranged and a plurality of radial magnet placement slots radially extending. The circumferential magnet placement slots and the radial magnet placement slots are circumferentially alternately arranged. The plurality of air gaps are adjacent to part of the plurality of magnet placement slots and distributed to be on a d-axis flux path of the rotor.

Abstract: A permanent magnet motor is provided, including: a stator and a rotor. The stator has a plurality of windings. The rotor has a plurality of magnet placement slots and a plurality of air gaps. The plurality of magnet placement slots includes a plurality of circumferential magnet placement slots circumferentially arranged and a plurality of radial magnet placement slots radially extending. The circumferential magnet placement slots and the radial magnet placement slots are circumferentially alternately arranged. The plurality of air gaps are adjacent to part of the plurality of magnet placement slots and distributed to be on a d-axis flux path of the rotor.

Abstract: A rotation spindle detection module includes a magnet retainer that retains at least one precision magnet and is mounted to a rotation spindle; at least one Hall device that detects the precision magnet and is arranged at a fixed position adjacent to the magnet retainer; a circuit board that is coupled to the Hall device and forms a circuit to receive a detection signal from the Hall device. As such, components that are used to detect a rotation spindle, including a Hall device, a precision magnet, and a circuit board, are integrated in a modularized fashion so as to achieve the purposes of easy mounting of the detection module to the rotation spindle.