Abstract: Recently, Vernier permanent magnet (VPM) machines, one special case of magnetic flux-modulated (MFM) machines, benefiting from their compact, simple construction and low-speed/ high-torque characteristics, have been receiving increasing interest. In this paper, the Vernier structure is integrated with an axial-flux PM machine to obtain the magnetic gear effect and produce an improved ...

Common understanding among machine designers is that, when scaling down to smaller sizes, most performance parameters will degrade. This principle is embodied in the goodness factor presented by Laithwaite. A derivation of the goodness factor for axial flux geometry is presented, confirming that the result is the same as for radial flux geometry. The paper then discusses the factor with respect...

The spoke type rotor can be used to obtain magnetic flux concentration in permanent magnet machines. This allows the air gap magnetic flux density to exceed the remanent flux density of the permanent magnets but gives problems with leakage fluxes in the magnetic circuit. The end leakage flux of one spoke type permanent magnet rotor design is studied through measurements and finite element simul...

Fuzzy logic is recently getting increasing emphasis in soft computing applications in the recent days. This paper presents an application of the fuzzy logic scheme to control the speed of an AC servo system & the same is proposed for a space vector pulse width modulation (SVPWM) inverter-fed permanent magnet synchronous motor (PMSM) drive. Based on the analysis of the PMSM transient response, a...

This paper presents a torque error compensation algorithm for a surface mounted permanent magnet synchronous machine (SPMSM) through real time permanent magnet (PM) flux linkage estimation at various temperature conditions from medium to rated speed. As known, the PM flux linkage in SPMSMs varies with the thermal conditions. Since a maximum torque per ampere look up table, a control method used...

In the present work, a methodology that allows optimizing permanent magnet synchronous generator (PMSG) design by establishing limit values of radius and length maximize efficiency for nominal parameters wind turbine is developed. The consists two fundamental models. One model calculates from base, other optimization determines optimum generators according to criteria maximum with minimum weigh...

Wind is an inexhaustible source of energy so that the use wind change systems will have a positive impact on environment. Sultan Turbine vertical axis turbine called Vertical Axis (VAWT). Synchronous generator machine converts mechanical into electrical energy. Permanent magnet synchronous (PMSG) uses permanent magnets to generate air gap field instead using electromagnet. The purpose this stud...