Design and performance analysis of intelligent variable flux built-in permanent magnet synchronous motor

Abstract

In view of the existing variable flux permanent magnet synchronous motor with limited range of magnetization and no automatic control of magnetization accuracy, an intelligent variable flux permanent magnet synchronous motor with auto-rotating permanent magnets and rotor built-in drive controller (IVFPMSM) is proposed. This paper analyzes the internal structure design and operation principle of this intelligent variable flux permanent magnet synchronous motor (IVFPMSM), and numerically analyzes the electromagnetic characteristics such as induced electric potential, winding magnetic chain, air gap flux density and weak magnetic characteristics when the permanent magnets (PMs) rotate at 0°, 30°, 45° and 90°, respectively. The results show that the PM can be rotated at any angle under the composite drive, which greatly widens the range of motor magnetization. The validity of the theory and design is verified by making a prototype and building a test platform.