Study on control method of U-shape single- phase permanent magnet synchronous motor

This paper mainly aims at studying on the variable voltage and variable frequency (VVVF) control of U-shape single- phase permanent magnet synchronous motor (U-SPPMSM). The ordinary U-SPPMSM performs only at the constant rotational speed rather than the variable speed, which limits the application area of U-SPPMSM. In this paper, two simple control methods, analog controller and digital controller based on single-chip microcomputer, are introduced, which can make the system simpler. The principle, structure and implementation method are discussed in detail, and two methods are compared.