A novel mixed speed regulation method for permanent magnet synchronous motor with high precision

A novel high precision mixed speed regulation method is presented, which is the combination of other control and self-control. The principle of mixed speed regulation is analyzed, the cut in condition of self-control to other control, interior given frequency of other control and the quick switch of other control to self-control are analyzed in detail. The method is applied to simulation and experimental system, the results show that the method achieves high speed precision in static state, and quick response in dynamic state, which is suited for high precision speed regulation field.