.png){kind=icon}
.png){kind=icon}
Return
Comparative Study of Torque Production Mechanism in Rotor-PM and Stator-PM Vernier Machines
.png){kind=icon}
PRE
AI
J
X
Z
DOI：10.1109/TEC.2026.3651484.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
In recent years, permanent magnet vernier (PMV) machines have gained more and more research interest owing to their superior torque density. However, rotor-PM vernier (RPMV) and stator-PM vernier (SPMV) machines, differing in the position of PMs, exhibit significant differences in torque performance. To reveal the underlying cause, this study begins with an analysis of the phase characteristics of three basic parts: the armature, flux modulator, and PMs, with particular attention to the phase angles of the resulting air-gap flux density harmonics. Then, based on the Maxwell stress tensor (MST) method, the torque contributions of the dominant harmonics in RPMV and SPMV machines, such as the <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">P</i><sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">a</sub>th, <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">P</i><sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">m</sub>th, and (<italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">P</i><sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">m</sub>+<italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Z</i>)th harmonics, are quantified to display their torque differences. The results indicate that torque in RPMV machines is primarily generated by the <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">P</i><sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">m</sub>th harmonic, while both the <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">P</i><sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">a</sub>th and <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">P</i><sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">m</sub>th harmonics contribute torque together in SPMV machines. In addition, the torque generated by the <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">P</i><sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">m</sub>th harmonic in RPMV machines markedly exceeds that in SPMV machines. To verify these theoretical findings, two representative machines with the same winding pole-pair number and machine dimension are compared. Finally, a prototype of the RPMV machine is tested to confirm the accuracy of the analytical and simulation results.
Keywords:
Electromagnetic analysis
harmonic analysis
magnetic flux leakage
permanent magnet machines
torque
Journal
IF:
5.4
Papers:
6.8K
Citations:
1.5W
Organization
Cited Papers