Research On Wound-Field Doubly Salient Motor Drive System

With the prominent advantages of simple structure, high reliability, controllable excitation,flexible regulation, and high power density, the Wound-Field Doubly Salient Motor(WFDSM) has thepotential to be a good candidate foe future motor applications. The characteristics of WFDSM,respectively under the control strategy of SAC, AAC and TPSS, are analyzed in the dissertation. Themain topics also include the closed-loop speed control method of WFDSM and the influence on itsefficiency when working under different control modes. The study lays a foundation for thetheoretical research and practical application of WFDSM.The structure topology and basic principle of WFDSM is introduced first. Under the controlstrategy of SAC and AAC, the conduction mode during circuit commutation and the characteristics ofelectromagnetic torque are analyzed. To improve the motor output torque and reduce the torque ripple,a novel strategy of the three-phase six-state(TPSS) control and its in-depth analysis are presented.A three-phase12/8poles WFDSM is modeled by Ansoft Maxwell2D. With different and,finite element analysis is carried out to investigate its working performance. The simulation resultsdemonstrate that, compared with traditional control methods, the TPSS control method can help toincrease the motor output torque and reduce the torque ripple. The advanced angle and are relatedto the load.A WFDSM drive system is built. The measurements of the no-load characteristics and loadcharacteristics with three different control strategies are finished, and the closed-loop speed controlmethod is studied. The experimental results verify the theoretical analysis and the finite elementmethod, which confirms that the WFDSM has great application and research value.