Influence of magnet arrangement on performance of flux reversal permanent magnet machine

Li, H. Y.; Zhu, Z. Q.

doi:10.1109/iemdc.2017.8002029

Cited by 12 publications

(15 citation statements)

References 10 publications

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“…Similar to Fig. 4, there is an optimal rotor pole number for each npp, and it is basically consistent with (18).…”

Section: Stator Slot Numbersupporting

confidence: 79%

“…It should be noted that the polarities of two adjacent PM pieces belonging to two stator teeth can be either identical or opposite. In the case of identical polarities, the number of stator slot can be only even while that can be either even or odd in the case of opposite polarities [18].…”

Section: A Machine Configurationmentioning

confidence: 99%

“…12-slot-stator FRPM machine when npp=1 [13] [18]. However, for different npp, the most suitable rotor pole number varies, which will be illustrated in the following.…”

Section: A Optimal Rotor Pole Numbermentioning

confidence: 99%

“…by evenly arranging 36-pole PMs on the inner stator surface of a 12/17 FRPM machine, its torque can be improved by 33% [17]; 3) the polarities of two adjacent magnets on different stator teeth can be either identical or opposite, e.g. in [18], 17% higher torque of a 12/14 FRPM machine is obtained by simply adjusting the two adjacent magnets belonging to two stator teeth from identical poles to opposite poles.…”

Section: Introductionmentioning

confidence: 99%

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Optimal Number of Magnet Pieces of Flux Reversal Permanent Magnet Machines

Zhu

2019

IEEE Trans. Energy Convers.

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This paper aims to comprehensively analyze the influence of number of permanent magnet (PM) pieces on electromagnetic performance of flux reversal permanent magnet (FRPM) machines. Firstly, the unified analytical model of FRPM machines having different numbers of PM pieces is established, from which the optimal number of PM pieces and the corresponding rotor pole number can be identified. It shows that by employing the optimal number of PM pieces instead of the conventional two on each stator tooth, additional back-EMF component can be generated which is beneficial to boost the machine performance. Then, the influence of critical design parameters including stator slot opening ratio, split ratio and stator slot number is investigated, providing a guidance to the design of FRPM machines aiming at maximum output torque. In addition, both finite element analyses and experimental tests are conducted to verify the analytical analyses. For 6-slot-stator FRPM machines, experimental results show that more than 40% higher output torque can be achieved in the machine with optimal number of PM pieces when compared to the conventional one.

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“…Similar to Fig. 4, there is an optimal rotor pole number for each npp, and it is basically consistent with (18).…”

Section: Stator Slot Numbersupporting

confidence: 79%

Section: A Machine Configurationmentioning

confidence: 99%

“…12-slot-stator FRPM machine when npp=1 [13] [18]. However, for different npp, the most suitable rotor pole number varies, which will be illustrated in the following.…”

Section: A Optimal Rotor Pole Numbermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optimal Number of Magnet Pieces of Flux Reversal Permanent Magnet Machines

Zhu

2019

IEEE Trans. Energy Convers.

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“…Except for the foregoing research scopes, the PM arrangement of the FRPM machine is worthy of further investigation since it directly affects the air-gap field distribution and corresponding performance [23,24]. The most conventional PM arrangement is shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Influence of Adjacent Teeth Magnet Polarities on the Performance of Flux Reversal Permanent Magnet Machine

Zhu

2019

IEEE Trans. on Ind. Applicat.

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This paper provides a comprehensive analysis of performance difference among various kinds of flux reversal permanent magnet (FRPM) machines having different PM arrangements. Four PM arrangement types are firstly identified by the number and relative polarities of PMs on the stator teeth, and their influence on equivalent pole-pair number of armature winding and working harmonics of air-gap field is revealed. Then, the torque variation against rotor pole number of each PM arrangement is analyzed. Detailed electromagnetic performance of four PM arrangements with 14-pole rotor is compared. It shows that the FRPM machine, in which four PM pieces are mounted on each stator tooth and two adjacent magnets on different stator teeth are of opposite polarities, offers the highest torque density and the highest efficiency, which makes it promising in low-speed high-torque applications. In addition, four prototype machines are manufactured and tested to validate the findings. Index Terms-flux reversal, magnet arrangement, torque proportion, winding factor

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