This paper presents the influences of winding magneto-motive force (MMF) harmonics on the torque characteristics in surface-mounted permanent magnet vernier (SPMV) machines. Based on the magnetic gearing effects, the armature magnetic field of the SPMV machines is modulated by flux modulation poles (FMPs). In the modulated magnetic field, a working harmonic which corresponds to the number of th...

In order to expand the speed range for an indirect matrix converter–surface mounted permanent magnet synchronous motor drive (IMC-SPMSM), a wide operation control strategy based on flux-weakening and over-modulation method is proposed in this paper. stage of inverter, IMC designed, which increases fundamental voltage transmission ratio (VTR) 1. addition, considering variation limit boundary wit...

For sensorless control of surface-mounted permanent magnet synchronous machines (SPMSMs), the major issue is in zero- and low-speed ranges. Since back-electromotive force (EMF) proportional to speed, back-EMF based methods fail at zero low speed. A solution considering starting process speed presented. simplified fundamental model-based method proposed. Based on model, measured stator currents ...

A high-end permanent magnet (PM) synchronous motor’s cogging torque is a significant performance measure (PMSM). During the running of motor, excessive will amplify noise and vibration. Therefore, must be taken into account while optimizing design motors with precise motion control. In this research, we proposed local optimization-seeking approach (RSM+NSGA-II-LR) based on Response Surface Meth...

In order to obtain the best power in wind energy conversion system (WECS) of direct-driven surface-mounted permanent magnet synchronous generator (SPMSG), active disturbance rejection control (ADRC) is introduced track motor speed real time. The algorithm provides a new design concept and an inherent robust controller component that requires very little information. Aiming at problem parameter ...

This paper presents the analysis and design optimization of a coaxial surface-mounted permanent-magnet magnetic gear. The magnetic field distribution in the coaxial magnetic gear is calculated analytically in the polar coordinate system and then validated by the finite element method (FEM). The analytical field solution allows the prediction of the magnetic torque, which is formulated as a func...

In a surface-mounted sintered NdFeB permanent-magnet generator, the magnets are usually thin (typically 4 mm), and hence the armature reaction, due to the time harmonics in the stator currents, is high. NdFeB magnets are conducting (resistivity typically 1.6 μΩm) and experience eddy-current losses. Therefore, the combined eddy-current losses in the NdFeB magnets and a solid iron rotor may becom...

This master thesis deals with the design of an permanent magnet (PM) motor for electric vehicles. An analytical model for surface mounted PM-motors (SMPM) is derived and verified with finite element analysis (FEM). Special attention is paid to the iron losses as they influence the performances. Today's motors for traction in electric vehicles are most often induction motors. In recent years, PM...