Comparative Study Between Doubly Salient PM Machine With New Stator/Rotor-Pole Number Combination and Biased Flux PM Machine

This article compares the doubly salient permanent magnet machine (DSPMM) having 18/13-pole number combination with 18/17-pole biased flux permanent magnet machine (BFPMM) to verify its improvement in torque characteristics. In such DSPMM, the stator/rotor-pole number combination is 18/13 rather tha...

Full description

Saved in:
Bibliographic Details
Published inIEEE transactions on industry applications Vol. 57; no. 3; pp. 2354 - 2365
Main Authors Wu, Lijian, Ming, Guangqiang, Zhang, Liu, Fang, Youtong, Li, Tingbin, Zheng, Wenpeng
Format Journal Article
LanguageEnglish
Published New York IEEE 01.05.2021
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Back electromotive force
Biased flux machine
Cogging
Comparative studies
Copper loss
doubly salient machine
Electromotive forces
Flux
inner-type flux focusing
Iron
permanent magnet (PM)
Permanent magnets
Ripples
Rotors
Stator cores
Stator windings
Stators
Topology
Torque
Torque measurement
torque performance
Online AccessGet full text

Cover

More Information
Summary:This article compares the doubly salient permanent magnet machine (DSPMM) having 18/13-pole number combination with 18/17-pole biased flux permanent magnet machine (BFPMM) to verify its improvement in torque characteristics. In such DSPMM, the stator/rotor-pole number combination is 18/13 rather than the conventional one (i.e., 18/12) to achieve balanced three phases, sinusoidal phase flux linkage and back electromotive force (back EMF), small cogging torque, and low torque ripple. On the other hand, an 18/17-pole BFPMM having the similar structure with the 18/13-pole DSPMM is analyzed, which has the best torque performance among such machines with the same stator pole number. To further improve average torque, the inner-type flux focusing (IFC) method is employed in both 18/13-pole DSPMM and 18/17-pole BFPMM. Then, both machines are optimized under the fixed copper loss and envelope size. The comparison shows that both machines have comparably small torque ripple while the 18/13-pole DSPMM with IFC (IFC-DSPMM) exhibits 35% higher torque density and 100% higher ratio of torque to PM volume. An 18/13-pole IFC-DSPMM is manufactured and tested to experimentally validate the predicted results.
ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2021.3058200