Open AccessEffect of angle displacements on electromagnetic performance of dual three‐phase consequent‐pole permanent magnet machine
Author(s) -
Li Feng,
Wang Kai,
Zhang Jianya,
Zeng Fanquan
Publication year - 2020
Publication title -
iet electric power applications
Language(s) - English
Resource type - Journals
ISSN - 1751-8679
DOI - 10.1049/iet-epa.2019.0611
Subject(s) - counter electromotive force , magnet , torque , harmonics , rotor (electric) , air gap (plumbing) , electromotive force , torque density , control theory (sociology) , physics , magnetic flux , engineering , mechanical engineering , electrical engineering , magnetic field , materials science , computer science , electromagnetic coil , voltage , control (management) , quantum mechanics , artificial intelligence , composite material , thermodynamics
The machine with consequent pole (CP) rotor can improve the utilisation ratio of permanent magnet (PM). However, all the N poles or S poles are replaced by salient rotor iron, leading to the asymmetric air‐gap flux density. It potentially results in even‐order back electromotive force (back‐EMF) harmonics and unbalanced magnetic force. This study aims to investigate the influence of various angle displacements (i.e. 0°, 15°, 30° and 60°) on the electromagnetic performance of the dual three‐phase PM machine with CP rotor. The electromagnetic characteristics, including air‐gap flux density, back‐EMF, torque performance, short circuit current, braking torque and PM demagnetisation under both healthy and fault conditions are compared comprehensively. Finally, the 24‐slot/22‐pole prototype machine is manufactured. The back‐EMF waveforms and static torque are measured and compared to the finite‐element predicted results to validate the theoretical analysis.