Research on Efficiency Control of Direct Drive Switched Reluctance Generator

Abstract

Aiming at the problems of single rotor rotation and low efficiency of the existing switched reluctance generator and the problems of high noise and high vibration of the generator, a new deflectable double stator Switched Reluctance Wind generator is proposed. The generator adopts inner and outer double stator structure, and the hydraulic console is connected on both sides of the rotor, which can realize multi degree of freedom deflection, adapt to different wind directions and apply to all kinds of wind power generation occasions; The temperature rise, stress and vibration displacement are obtained through the simulation calculation of magnetic thermal solid coupling field. A nonlinear simplified mathematical model is established to analyze the loss. The main loss of the motor, namely copper loss, is minimized by minimizing the effective value of phase current. The combination of on angle and off angle with minimum phase current effective value, minimum copper consumption and optimal efficiency is obtained to improve the generator operation efficiency and power density. The effectiveness of the proposed optimization method is verified by comparing the operation performance of switched reluctance generator before and after optimization.