No-Load Characteristic Analysis of Single/Three-Phase Dual-Port Permanent Magnet Synchronous Generator With Eccentric Magnetic Metal Block Based on Nonlinear Magnetic Field Analytical Method

Abstract

The establishment of no-load magnetic field model is of great significance to the optimization design and performance analysis of permanent magnet synchronous generator (PMSG). The authors describe the basic structure and operating principle of the single/three-phase dual-port permanent magnet synchronous generator (STPDP-PMSG), and optimizes the dimension parameters of the surface-mounted magnetic pole consisting of magnetic metal block and permanent magnet to obtain an optimal rotor pole structure parameter. Considering the nonlinear variation of the stator and rotor core permeability, based on the analytical method of nonlinear subdomain model, the magnetic field model of STPDP-PMSG is established to analyze its no-load characteristics. Furthermore, the authors calculate and analyze the no-load air gap flux density and no-load back electromotive force (BEMF) of the generator, and the finite element method is used for verification. Finally, an experiment is conducted on a 4-pole 48-slot STPDP-PMSG with eccentric magnetic metal block. The measured no-load BEMF is basically consistent with the analytical calculation value, which verifies the accuracy of the nonlinear subdomain model proposed in this study.

Keywords

• STPDP-PMSG
• optimize
• no-load characteristics
• nonlinear subdomain model