The invention relates to a
permanent magnet synchronous motor without a
stator iron core, which mainly comprises a rotor shaft, an inner rotor iron core, a
magnetic isolation block, a hollow cup
stator (including a skeleton and a fractional slot concentrated winding), a Halbach permanent
magnet and an outer rotor iron core, wherein the
magnetic isolation block is embedded in the inner rotor iron core and forms an inner rotor
core component part with the inner rotor iron core, the inner rotor iron core, the outer rotor iron core and the permanent
magnet are all connected with the rotor shaft, the Halbach permanent
magnet is stuck to the outer rotor iron core, and the hollow cup
stator is fixed on a motor shell. The permanent
magnetic circuit is formed into a
closed loop circuit via the inner rotor iron core, the magnetic air gap, the Halbach permanent magnet and the outer rotor iron core. The invention utilizes the
magnetic isolation block to achieve a salient pole structure of the motor so as to realize control by the difference of A-axis and D-axis
inductance, the concentrated winding is utilized to weaken
harmonic content in winding induced
electromotive force and greatly increase the sinusoidal property of the winding induced
electromotive force and winding current, so the torque impulse is reduced, and the stationarity of the output torque is improved.