An improved non-singular fast terminal sliding mode control (INFTSMC) is proposed in this study, to improve the dynamic speed regulation and tracking accuracy of a surface-mounted permanent magnet synchronous motor (SPMSM) system. A surface that completely removes singularities from controller input proposed. The key characteristics INFTSMC are convergence errors, high accuracy, robustness agai...

A surface integration method for modeling of permanent magnets in 3-D space using edge nite elements is presented, where the value of the coercive magnetic forceH c is integrated only over the entire surface area of the permanent magnet. This allows direct computation of the equivalent source current values, which are afterwards assigned to the surface edges of the permanent magnet. The main ad...

Magnetization of large Nd-Fe-B sintered permanent magnets is still challenging. This type of permanent magnet is electrically conductive, so impulse magnetization causes a flow of eddy currents which prevent magnetization of the whole volume of the magnet. The paper deals with the impulse magnetization of sintered Nd-Fe-B permanent magnets and shows a method for the determination of suitable pa...

This document deals with the design of a Permanent Magnet Synchronous Motor (PMSM) to peripherally drive counter-rotating pump inducer. The motor/pump is associated using rim-driven principle where motor’s active parts are located at periphery inducer blades. It proposes Halbach array permanent magnets for rotor motor. solution allows generation Sinusoidal Electromotive Force (EMF). Therefore, ...

Permanent magnet motors have the advantages of high output torque, efficiency, and low noise, but cogging effect is obvious. The 24-slot 4-pole surface-mounted permanent synchronous motor taken as an example to reduce torque motors. Firstly, generation mechanism analysed based on energy method, pole arc coefficient, air gap length, magnetic eccentricity, thickness, slot opening width are determ...

In order to compensate the low performance of ferrite magnet, surface permanent magnet mounted (SPM) motor has considerably thicker magnet than air-gap length, thus end effect, which is determined by the ratio between magnetic air-gap and stack length, is negligible. As a result, 2-D finite element analysis (FEA), which is not possible to consider end effect, is generally used to ensure analysi...

Abstract: A new type of permanent magnet (PM) brushless claw pole motor (CPM) with soft magnetic composite (SMC) core is designed and analyzed in this paper. The PMs are mounted on the claw pole surface, and the three-phase stator windings are fed by variable-frequency three-phase AC currents. The advantages of the proposed CPM are that the slip rings on the rotor are cast off and it can achiev...

Abstract: Axial flux permanent magnet generator (AFPMG) is can have one or two sided stator windings, meaning that the rotor disc of which the permanent magnet (PM) are mounted may be sandwiched in between two parallel stator discs. This paper deals with the development of AFPMG for a gearless wind energy system. This gives the axial air gap PM generator the potential for very high torque gener...