Design and Analysis of the New High-Reliability Motors With Hybrid Permanent Magnet Material

Chen, Qian; Liu, Guohai; Zhao, Wenxiang; Shao, Mingming; Liu, Zhengmeng

doi:10.1109/tmag.2014.2342662

Cited by 33 publications

(15 citation statements)

References 26 publications

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“…Machines applying a Ns = 2p ± 1 combination have asymmetric stator and rotor structure [21], which may result in relatively high unbalanced magnetic force, excessive noise, and vibration, hence reducing the bearing life. Thus, an Though a similar rotor structure as the motor in the Toyota Pruis is adopted in this investigated PM brushless machine, electromagnetic performances, such as the distribution of the magnetic field and inductances, are obviously changed due to the variation of the winding structure.…”

Section: Machine Design Specificationsmentioning

confidence: 99%

“…Machines applying a N s = 2p˘1 combination have asymmetric stator and rotor structure [21], which may result in relatively high unbalanced magnetic force, excessive noise, and vibration, hence reducing the bearing life. Thus, an N s = 2p˘2 combination is preferred, and a 12-slot/10-pole PM brushless machine is selected in this paper.…”

Section: Machine Design Specificationsmentioning

confidence: 99%

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Design and Optimization of Permanent Magnet Brushless Machines for Electric Vehicle Applications

Zhu

et al. 2015

Energies

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In this paper, by considering and establishing the relationship between the maximum operating speed and d-axis inductance, a new design and optimization method is proposed. Thus, a more extended constant power speed range, as well as reduced losses and increased efficiency, especially in the high-speed region, can be obtained, which is essential for electric vehicles (EVs). In the first step, the initial permanent magnet (PM) brushless machine is designed based on the consideration of the maximum speed and performance specifications in the entire operation region. Then, on the basis of increasing d-axis inductance, and meanwhile maintaining constant permanent magnet flux linkage, the PM brushless machine is optimized. The corresponding performance of the initial and optimal PM brushless machines are analyzed and compared by the finite-element method (FEM). Several tests are carried out in an EV simulation model based on the urban dynamometer driving schedule (UDDS) for evaluation. Both theoretical analysis and simulation results verify the validity of the proposed design and optimization method.

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Section: Machine Design Specificationsmentioning

confidence: 99%

Section: Machine Design Specificationsmentioning

confidence: 99%

Design and Optimization of Permanent Magnet Brushless Machines for Electric Vehicle Applications

Zhu

et al. 2015

Energies

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“…Substituting (14) into (16) and satisfying (15) gives the expression of current vector in the flux weakening region III as…”

Section: Flux Weakening Capabilitymentioning

confidence: 99%

“…In [10] and [11], both the torque density and power factor of the PMV motors has been improved by employing spoke magnets. To save costly rare earth magnet and cut cost, new motors with less rare-earth permanent magnet material, weaker ferrite magnets, or no magnets has become good solutions [2], [12]- [15]. A PMV motor with ferrite has been proposed in [16], which reached the targeted torque for electrical vehicle and met the cost constraints.…”

Section: Introductionmentioning

confidence: 99%

Quantitative Comparison of Integral and Fractional Slot Permanent Magnet Vernier Motors

Liu

Zhao

et al. 2015

IEEE Trans. Energy Convers.

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This paper presents and compares two permanent magnet vernier (PMV) motors with fractional slot concentrated windings (FSCWs) and integral slot distributed windings (ISDWs). The ISDW PMV motor is newly proposed and optimized for a fair comparison with the existing FSCW one. The equations of back electromotive force of both motors are investigated and derived showing that the ISDW PMV motor has the potential to obtain higher torque capability. Also, their electromagnetic performances, such as torque capability, fault tolerance, loss, and efficiency, are calculated and compared by using the finite-element analysis. Then, the maximum power strategy for PMV motors operating at high speed is presented. The simulated results show that both motors possess excellent flux weakening capability. Finally, the effectiveness of the theoretical analysis is verified by the finiteelement analysis results and experiments on a prototype FSCW PMV motor.

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“…ferrite PM) usually serve as magnetic sources at the same time. In [9], a new kind of LRE interior PM motor is proposed, which can realise desirable output torque and reduced manufacturing cost simultaneously. However, it is worth noting that LRE PM motors are often vulnerable to be demagnetised, because of the relatively low coercivity of ferrite PM and complex mutual influence of two kinds of PM material [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Dynamic demagnetisation investigation for less‐rare‐earth flux switching permanent magnet motors considering three‐phase short‐circuit fault

Fan

Zhu

Quan

et al. 2018

IET Electric Power Applications

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This study presents dynamic demagnetisation investigations of less-rare-earth (LRE) flux switching permanent magnet (LRE-FSPM) motor under three-phase short-circuit (SC) fault. Owing to relatively low coercivity of ferrite PMs, it is necessary to investigate demagnetised risk of LRE PM motors. Actually, motors suffer from larger demagnetising risk under SC faults than normal conditions. Hence, it is essential for LRE PM motors to comprehensively investigate and enhance antidemagnetisation capability during design stage. Here, by integrating electrical-magnetic field calculation and driving control circuit, dynamic demagnetisation characteristics of the LRE-FSPM motor under SC faults are calculated as an example. To fairly evaluate demagnetisation withstand capability of LRE-FSPM motor, the non-rare-earth (NRE)-FSPM motor is also presented and compared as a referenced motor. Then, the dynamic demagnetisation characteristics of two motors are analysed and compared, including demagnetising d-axis current, operating points, and demagnetised area. It is found that, the proposed LRE-FSPM motor exhibits improved operating points and less demagnetised area, which is only about one-third of that of NRE-FSPM motor. Finally, the demagnetisation calculation results not only verify the validity of dynamic demagnetisation investigation approach, but also prove the reasonability of LRE-FSPM motor, which provide a promising research path for the design of LRE PM motors.

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Design and Analysis of the New High-Reliability Motors With Hybrid Permanent Magnet Material

Cited by 33 publications

References 26 publications

Design and Optimization of Permanent Magnet Brushless Machines for Electric Vehicle Applications

Design and Optimization of Permanent Magnet Brushless Machines for Electric Vehicle Applications

Quantitative Comparison of Integral and Fractional Slot Permanent Magnet Vernier Motors

Dynamic demagnetisation investigation for less‐rare‐earth flux switching permanent magnet motors considering three‐phase short‐circuit fault

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