Research On The Novel Permanent Magnet Concentrated-Flux Synchronous Reluctance Motor

With increasing emphasis on energy and the environment,the state has clearly pointed out that the manufacturing industry should be transformed with high efficiency and low pollution.As the heart of today’s industry,the improvement of its performance will directly contribute to the reduction of industrial energy consumption.Permanent Magnet Synchronous Reluctance Motor(PM-SynRM),as a novel interior permanent magnet synchronous motor,is popular for its advantages such as small amount of permanent magnets,high power density,and wide speed range.Favor.The electromagnetic torque of the conventional PM-SynRM is composed of magnetic torque and reluctance torque,but the two are not fully utilized.If the torque characteristics are improved,the output torque of PM-SynRM can be obtained Further improve.Based on this,a novel permanent magnet concentrated-flux synchronous reluctance motor,which can not only significantly improve the air gap flux density and magnetic torque components is proposed in this paper.Moreover,the maximum values of the magnetic torque and the reluctance torque are superimposed at the same current phase angle,thereby improving the utilization of each torque component and realizing the improvement of the motor torque density and efficiency.According to the design concept and topological structure,the design method of flux linkage offset for this kind of motor to maximize the utilization of torque is deduced,and a mathematical model is established.Then the structural parameters of the proposed motor model are optimized,the electromagnetic performance of the motor is analyzed,and a vector control system is built in MATLAB to realize the new novel permanent magnet concentrated-flux synchronous reluctance motor vector control.Finally,prototype development and experimental testing are carried out.The specific research content of this paper is as follows:(1)Analyzes the structural characteristics of the novel permanent magnet concentrated-flux synchronous reluctance motor,studies the influence of permanent magnet configuration and right connected flux barrier on torque characteristics and output torque in asymmetric rotor structure.The mechanism of maximum value of magnetic torque and reluctance torque at the same current phase angle is clarified by establishing flux offset design method,and the mathematical model of the novel permanent magnet concentrated-flux synchronous reluctance motor is established according to flux offset design method.(2)Analyze and improve the rotor structure strength and electromagnetic performance,and determine the asymmetric rotor basic structure,combining engineering applications,considering the rotor installation and mechanical structure strength.(3)Based on the improved asymmetric rotor structure,the output torque of the motor is analyzed according to the objective function,and the structural parameter optimization variables are selected.Through Latin hypercube sampling,Kriging modeling,response surface verification,genetic algorithm optimization and other methods to reduce the time and space costs required for optimization,the torque ripple is reduced by 30.14%and the torque is increased by 7.27%.(4)Analyze the torque characteristics,main magnetic circuit,dq axis inductance,no-load and on-load characteristics,loss,efficiency under different control method,demagnetization,forward and reverse rotation of the optimized novel permanent magnet concentrated-flux synchronous reluctance motor.(5)Based on the mathematical model of the novel permanent magnet concentrated-flux synchronous reluctance motor,a novel permanent magnet concentrated-flux synchronous reluctance motor model and vector control system are built in MATLAB,and the accuracy of the vector control system is verified by combining the finite element results.Finally,prototype manufacturing and experiments were carried out.