... is incorporated to regulate the voltage difference between the DC-link capacitors. Torque ripple is reduced by eliminating vectors responsible for excessive torque pulsations, while CMV variations are minimized through the creation of two virtual vectors that replace those generating high CMV levels...

...Zuoguang Yan; Shaopeng Wu; Meng Zhang; Pinjia Zhang Purpose This study aims to alleviate the high cogging torque and torque ripple problems of the stator permanent magnet electrical machine (SPMEM) used in the flywheel energy storage system, which result from its double salient structure and high...

... Torque ripple With the increasing demand for industrial automation and precision control, magnetic gears are becoming more and more popular in the fields of marine power generation, ship propulsion, rail traction and wind power generation due to their significant advantages of contactless...

... of the electromagnetic force density is established based on the Maxwell tensor method. The impact of HVLSPMSM torque ripple frequency, radial electromagnetic force spatial–temporal distribution and rotor unbalanced magnetic tension force by ITSF is revealed. Finally, the electromagnetic–mechanical coupling model...

...Mohammad Reza Naeimi; Karim Abbaszadeh; Reza Nasiri-Zarandi Purpose High torque ripple is the significant challenge of the synchronous reluctance machine in household electric appliances, electric vehicles and so on. This paper aims to present an optimized design of a synchronous reluctance rotor...

... on equivalent magnetic circuit (EMC) method. Then, the RS model and modified SA-CS algorithm are proposed to obtain higher torque, lower torque ripple and higher efficiency. Findings After verification by finite element method for no-load and load performance, the optimal machine has higher torque density...

...Emre Uygun; Michel Hecquet; Abdelmounaïm Tounzi; Daniel Depernet; Vincent Lanfranchi; Serge Bruno; Thierry Tollance Purpose This paper deals with the study of the influence of the phase shift between currents and back-electromotive forces (back-EMF) on torque ripple and radial magnetic forces...

..., torque ripple, output voltage and other parameters of the generator and the permeability of slot wedge is confirmed. In addition, the variation of losses and torque with wedge thickness is also obtained. Originality/value The influence mechanism of magnetic slot wedge on the performance of hydro...

... length of 78.5° and pole shoe thickness 4.8 mm. The peak-cogging torque has been reduced from 0.158 Nm to a respectable value of 0.066 Nm. However, to reduce electromagnetic torque ripple and pulsations, further investigations are required. Originality/value The paper presents an approach to cogging...

...Xiaodong Sun; Jiangling Wu; Shaohua Wang; Kaikai Diao; Zebin Yang Purpose The torque ripple and fault-tolerant capability are the two main problems for the switched reluctance motors (SRMs) in applications. The purpose of this paper, therefore, is to propose a novel 16/10 segmented SRM (SSRM...

... permanent magnet synchronous motor for torque ripple reduction while maintaining the average torque. Originality/value The ADTK model selects its basis functions adaptively and dynamically so that it may have better accuracy than any other Kriging models. Through adaptive insertion of new sampling data...

...Young Hyun Kim; Jung Ho Lee Purpose This study aims to propose criteria for both optimal-shape and magnetizer-system designs to be used for a high-output spoke-type motor. The study also examines methods of reducing high-cogging torque and torque ripple, to prevent noise and vibration. Design...

...Dr Ahmed Masmoudi; K. Wang; Z.Q. Zhu; G. Ombach; M. Koch; S. Zhang; J. Xu Purpose – The purpose of this paper is to reduce the torque ripple but not to decrease the average torque of synchronous reluctance machines by using one step or more than two axially laminated rotors with asymmetric flux...

... with emphasis on output torque capability and torque ripple. Design/methodology/approach – AC synchronous reluctance machine (SynRM) or permanent magnet assisted SynRM presently receives a great deal of interest, since there is less or even no rare-earth permanent magnet in the rotor. Most of SynRM...

...Jianxin Shen; Dan Shi; Canfei Wang; Peng Li; Kang Wang; Mengjia Jin Purpose – The purpose of this paper is to investigate a new cause of torque ripple in interior permanent magnet (IPM) alternating current (AC) motors, which is common but has hardly been studied. The paper also proposes a new...

...K. Wang; Z.Q. Zhu; G. Ombach; W. Chlebosz Purpose – The purpose of this paper is to investigate torque ripple and magnetic force on the teeth in interior permanent magnet (IPM) machines over a wide range of speed operation for electrical power steering (EPS) applications. Design/methodology...

... that the conventional skewing method does not work well for this machine. The new proposed technique has a significant effect on the torque pulsation. © Emerald Group Publishing Limited 2012 Torque ripple Halbach array permanent magnet machine Magnet skewing Finite element method Cogging torque Torque...

... It has been found that the introduced DTC strategy offers higher performance than the Takahashi one. Of particular interest are: the reduction of both torque ripple and commutation frequency; the eradication of the demagnetization problem which is a vital requirement in position control applications...