Harmonic Analysis of Linear-Rotor Axial Reluctance Resolver

The resolver has the advantages of durability and strong anti-interference ability, and can position the vector control motor system to meet the requirements of high-performance motor system integration. A linear axial reluctance resolver structure is proposed to apply on positioning the vector control motor system. The coupling area variation law between stator and rotor is analyzed by calculus method. The sinusoidal winding structure is designed to reduce the harmonic amplitude, and the electromagnetic field simulation is carried out to analyze the flux distribution of the axial magnetic circuit resolver. Simultaneously, the feasibility of signal decoupling principle for the resolver with this structure is presented. The decoupling effect and feasibility of the magnetic field are simulated and verified by finite element method, which indicates a promising application value of the designed axial reluctance resolver in positioning the motors under vector control.

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