combination of sinusoidally wound stator and a permanent magnet for rotor design is the basis of PMSM.
The wires and the permanent magnet
One can purchase a permanent magnet motor online from Grainger where they have many available for around $400. One can also find them for purchase on ebay.
Reverse the polarity of armature windings of the motor.
commutator
permanent magnet motors and series motor
A permanent magnet is necessary for an electric motor to function effectively because it creates a magnetic field that interacts with the electric current flowing through the motor's coils, causing the motor to generate rotational motion. This interaction between the magnetic field of the permanent magnet and the electric current is essential for the motor to convert electrical energy into mechanical energy efficiently.
A refrigerator is not a magnet, however it does contain an electric motor, and within that motor are permanent magnets (as well as electromagnets).
size and weight
permanent magnet motors and series motor
Size and weight
Permanent Magnet Brush-Less Direct Current motor. Sine wave driven.