Optimal Design of Gearless Flux-Switching Generator with Ferrite Permanent Magnets

Abstract

In this paper, the optimal design of the Flux-Switching Generator with ferrite magnets based on a two-mode substituting load profile for a gearless wind generator is considered. A one-criterion Nelder-Mead method is used to optimize the generator design. The optimization function is constructed mainly so as to minimize the average losses in the generator and the required AC–DC converter power. Also, the Flux-Switching Generator torque-ripple and the ferrite magnets volume are minimized. Using substituting profiles instead of initial ones reduces the calculation efforts substantially. The paper contains the analysis of the optimal design of the Flux-Switching Generator with ferrite magnets.

Comparison of Flux-Switching and Interior Permanent Magnet Synchronous Generators for Direct-Driven Wind Applications Based on Nelder–Mead Optimal Designing

“…The generator weight and EMF THD were chosen as the optimization criteria. The optimization of PMFSGs with rare earth [7] and ferrite magnets [23] using the Nelder-Mead method was also described. In [7,23], the objective optimization function was selected to reduce losses, torque ripple, and the required power of the semiconductor inverter.…”

“…The optimization of PMFSGs with rare earth [7] and ferrite magnets [23] using the Nelder-Mead method was also described. In [7,23], the objective optimization function was selected to reduce losses, torque ripple, and the required power of the semiconductor inverter. In [24], a comparison was made of PMFSGs with rare-earth and ferrite magnets developed in [7,23].…”

“…In [7,23], the objective optimization function was selected to reduce losses, torque ripple, and the required power of the semiconductor inverter. In [24], a comparison was made of PMFSGs with rare-earth and ferrite magnets developed in [7,23]. However, no comparison has been made between PMFSGs and IPMSGs with rare-earth magnets when using the Nelder-Mead method.…”

“…The generators have the same external radius of 80 mm and the stack length of 100 mm. The machines are designed and optimized using the approach described in the previous papers [7,23] based on the Nelder-Mead algorithm with the optimization method, the mathematical models of the machines, and the substituting profile method. An important advantage of the Nelder-Mead method over other methods that are often used to optimize electrical machines [25,26] is the significant savings in computational time [23].…”

“…Section 7 summarizes the general findings of the comparative study. used to optimize electrical machines [25,26] is the significant savings in computational time [23].…”