A Novel Method to Magnetic Flux Linkage Optimization of Direct-Driven Surface-Mounted Permanent Magnet Synchronous Generator Based on Nonlinear Dynamic Analysis

Abstract

This paper pays attention to magnetic flux linkage optimization of a direct-driven surface-mounted permanent magnet synchronous generator (D-SPMSG). A new compact representation of the D-SPMSG nonlinear dynamic differential equations to reduce system parameters is established. Furthermore, the nonlinear dynamic characteristics of new D-SPMSG equations in the process of varying magnetic flux linkage are considered, which are illustrated by Lyapunov exponent spectrums, phase orbits, Poincaré maps, time waveforms and bifurcation diagrams, and the magnetic flux linkage stable region of D-SPMSG is acquired concurrently. Based on the above modeling and analyses, a novel method of magnetic flux linkage optimization is presented. In addition, a 2 MW D-SPMSG 2D/3D model is designed by ANSYS software according to the practical design requirements. Finally, five cases of D-SPMSG models with different magnetic flux linkages are simulated by using the finite element analysis (FEA) method. The nephograms of magnetic flux density are agreement with theoretical analysis, which both confirm the correctness and effectiveness of the proposed approach.

Rotor design optimization of a 4000 rpm permanent magnet synchronous generator using moth flame optimization algorithm

“…They focused on the IPMSG's rotor design optimization in order to determine their impact on the MFD and machine's performance. A direct-driven surface-mounted PMSG (D-SPMSG)'s magnetic flux linkage optimization was researched by Xie et al [9]. They used FEA to do simulations and determined winding arrangements, PM specifications and dimensions, as the factors those will be optimized.…”

Study and Stability Analysis of Leading Phase Operation of a Large Synchronous Generator

“…In recent years, with the gradual increase of the capacity of the synchronous generator, the requirement for its reliability is also increasing [15]. It is well known that the existing mathematical models of generators are multi-variable, nonlinear, and strongly coupled [16]. The power equations under two different leading phase test conditions have been established to analyze steady state stability of synchronous generator [17].…”