Abstract
Electric actuators with fast dynamic response and high torque density are widely used in aerospace and industrial applications. In this paper, the design and optimization of a short-term high-overload permanent magnet synchronous motor (STHO-PMSM) is presented. The rated working point is optimized according to the operating conditions of the motor. The effect of electromagnetic load on the extreme torque which mainly include ampoule number and the magnetic energy of the PM is researched. Due to the nonlinear saturation influence, the equivalent magnetic network model is established. The saturation torque discount factor is proposed to quantify the degree of the core magnetic saturation. Winding temperature model is presented to inspect the motor reliability. To verify the feasibility and accuracy of mathematical model analysis (MMA), the performance of the motor in different currents is investigated compared to the finite element analysis (FEA). A prototype motor is manufactured and tested. The results of the MMA, FEA, and experiment show that the designed motor can achieve the high performance with the 10 times overload in a short time. The method of the MMA can relatively accurately predict as well as take less time consumption.
Highlights
With the development of all-electronics technology, electric actuators are widely used in aerospace, industrial applications, etc
To achieve the high torque density and low torque ripple, fractional slot concentrated winding permanent magnet synchronous machines are studied by optimizing rotor structure [15,16]
The influence on the on the performance of that motors that the electromagnetic load can significantly increase themultiple overload performance of motors the electromagnetic load can significantly increase the overload is multipleinisthis studied
Summary
With the development of all-electronics technology, electric actuators are widely used in aerospace, industrial applications, etc. The torque of the short-term high-overload permanent magnet synchronous motor (STHO-PMSM). To achieve the high torque density and low torque ripple, fractional slot concentrated winding permanent magnet synchronous machines are studied by optimizing rotor structure [15,16]. High maximum output power density and the high ultimate torque for a short time are the pursued performance of short-term high-overload motors. There is a lack of research on the influence of magnetic saturation on the extreme torque and is not considered in the design process of the motor. The influences of electrical load and magnetic load on the extreme torque of the motor are analyzed, respectively, in Section 2, where it is reasonable and necessary to reduce the number of windings per phase to increasing the electrical load and to achieve the high-overload multiples extreme torque. The accuracy of the MMA to predict the results can meet the requirements as well as reduce the computational time
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