Multi-phase, multi-polar linear or rotation synchronous motor, has secondary part with permanent magnets of variable polarities, where ratio between slot pitch and pole pitch is selected by sections of motor

摘要

The motor has a secondary part that is arranged opposite to a primary part and includes a set of permanent magnets (6) of variable polarities, where the permanent magnets are arranged on a common reflow level. Ratio between a slot pitch (Tn) and a pole pitch (Tp) is selected by sections of the motor. Allocation of teeth and the permanent magnets is repeated by the teeth. A small electrical phase offset is present between two slots with respect to an electromotive force related to a magnetic period, where the force is produced by slot lengths in coil lines.