As one of the main parasitic parameters in permanent magnet (PM) synchronous machines (PMSMs), cogging torque is the main component of the torque ripple, which has always been the handicap in the high-performance, low-speed drive systems. Over the last two decades, various methods have been proposed to decrease the cogging torque in both radial-flux and axial-flux PMSMs. Among these methods, st...

Axial field flux-modulation permanent magnet (AF-FMPM) machines have been developed for direct drive applications such as wind power generation, HEVs, and railway traction. However, the existing studies on AF-FMPM are limited to PM rotor structure, less research has carried out with stator structure. This paper two axial machines, i.e., NS or NN type, which all consist of same structures but du...

In this article, we propose a novel nonlinear semianalytical model (AM) for the magnetic field calculation of electric machines. The properties and local saturation effect iron part are taken into consideration in Cartesian coordinates, which is main contribution proposed model. Thus, high accuracy electromagnetic results can be obtained with low computational time cost. developed based on harm...

Purpose – Force output is extremely important for electromagnetic linear machines. The purpose of this study is to explore new permanent magnet (PM) array and winding patterns to increase the magnetic flux density and thus to improve the force output of electromagnetic tubular linear machines. Design/methodology/approach – Based on investigations on various PM patterns, a novel dual Halbach PM ...

Yunkai Huang 1, Baocheng Guo 1,*, Ahmed Hemeida 2 and Peter Sergeant 2 1 Engineering Research Center for Motion Control of Ministry of Education, Southeast University, Nanjing 210096, China; [email protected] 2 Department of Electrical Energy, Systems and Automation, Ghent University, Ghent B-9000, Belgium; [email protected] (A.H.); [email protected] (P.S.) * Correspondence: guobaocheng...

A characterization of the rotor losses in single-sided axialflux permanent-magnet (AFPM) machines fitted with nonoverlapped windings (NOW) is presented in this paper, through experimental validation of finite element analysis (FEA) estimates. A literature review detailing the previous work done in the area of rotor loss estimation is given and the approaches taken by the authors to model the AF...

We present an enhanced version of a method to minimize the amount of permanent-magnet (PM) material required to create a certain flux linkage in the stator winding of a PM machine. The enhanced version obtains the distribution of the factor inside the PM; identifies the areas inside the PM volume where the orientation of magnetization may be modified, so as to further increase the amount of no-...