Speed Ripple Reduction of Direct-Drive PMSM Servo System at Low-Speed Operation Using Virtual Cogging Torque Control Method [PDF]
, 2021 This paper presents a virtual cogging torque (VCT) control method to reduce the speed ripple of direct-drive permanent magnet synchronous machine (DD-PMSM) servo system under low-speed conditions.
Bu, Feifei +6 more
core +2 more sources
A new technique of cogging torque suppression in direct-drive permanent-magnet brushless machines [PDF]
, 2010 In direct-drive electric propulsion systems, where there is no reduction gear to minimize and absorb the adverse effects of cogging torque generated by the permanent-magnet (PM) machine, minimization of cogging torque generation is of particular ...
Luk, Patrick Chi-Kwong, Fei, Wei-Zhong
core +1 more source
Cogging Torque Mitigation of Modular Permanent Magnet Machines [PDF]
IEEE Transactions on Magnetics, 2016 This paper proposes a novel cogging torque mitigation method for modular permanent magnet (PM) machines with flux gaps in alternate stator teeth. The slot openings of the modular PM machines are divided into two groups in a special way. By shifting the slot openings of two groups in opposite directions with the same angle, the machine cogging torque ...
Li, G. +4 more
openaire +2 more sources
Torque ripple reduction of a direct-drive permanent-magnet synchronous machine by material-efficient axial pole pairing [PDF]
, 2011 This paper investigates a material-efficient axial pole pairing method for torque ripple reduction in a direct-drive outer-rotor surface-mounted permanent-magnet synchronous machine.
Patrick Chi-Kwong Luk +3 more
core +1 more source
A Self-Learning Solution for Torque Ripple Reduction for Non-Sinusoidal Permanent Magnet Motor Drives Based on Artificial Neural Networks [PDF]
, 2013 This paper presents an original method, based on artificial neural networks, to reduce the torque ripple in a permanent-magnet non-sinusoidal synchronous motor.
WIRA, Patrick +7 more
core +1 more source
Cogging Torque Characteristics of a Magnetic-Geared Motor
IEEJ Transactions on Industry Applications, 2012 Purpose The purpose of this paper is to propose a magnetic-geared motor with permanent magnets only on the high-speed rotor as a solution to the problems of magnetic gears. Magnetic gears have some advantages such as no mechanical loss and maintenance-free operation that are not observed in conventional mechanical ...
Niguchi, Noboru, Hirata, Katsuhiro
openaire +1 more source
Investigation of torque characteristics in a novel permanent magnet flux switching machine with an outer-rotor configuration [PDF]
, 2014 This paper comprehensively investigates the torque characteristics of a novel permanent magnet flux switching machine with outer-rotor configuration.
Miao, Dong-Min +3 more
core +1 more source
Assessment of torque components in brushless permanent-magnet machines through numerical analysis of the electromagnetic field [PDF]
, 2005 For the calculation of torque in brushless (BL) alternating current motors a local method is proposed, based on the Maxwell stress theory and the filtered contributions due to the harmonics of the magnetic vector potential in the motor air gap.
Dellinger, S.J. +4 more
core +1 more source
Brushless Direct Current Electric Motor Design with Minimum Cogging Torque [PDF]
, 2014 Cogging torque is one of the factors that influence electric motor efficiency. Many methods have been used to reduce the cogging torque. One of the methods is the determination of the number of slots and poles fraction.
Inayati, I. (Inayati) +2 more
core +4 more sources
Energies, 2021 Cogging torque is a critical dilemma in Permanent Magnet Brushless DC (PMBLDC) motors. In medium-low power PMBLDC motors, redundant vibrations and forbidding noises arise as a result of the harmonic magnetic forces created by cogging torque.
T. A. Anuja, M. Arun Noyal Doss
doaj +1 more source