Study and experimental performance evaluation of flux intensifying PM motor with variable leakage magnetic flux

Aoyama, Masahiro; Noguchi, Toshihiko

doi:10.1002/eej.23162

Cited by 8 publications

(4 citation statements)

References 19 publications

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“…As shown in Tables 7 and 8, we see that the simulation result with the initial rotor angle of 22.5 O is very close to the measured value under the sinusoidal excitation case, and it is fairly similar to the measured one under the inverter excitation case. According to the past studies (31) (32) , the initial rotor position can also be set at 22.5 O for analysis of the synchronous motors. From the above observations, in this paper, we chose to set the initial rotor angle of 22.5 O in the FEA model of the IPMSM.…”

Section: Appendix 1 Explanation Of Initial Rotor Angle In Fea Modelmentioning

confidence: 99%

Conceptual Diagrams of Extended Building Factor for Analysis and Evaluation of Factors on Core Loss Density Increase in IPMSM

et al. 2023

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This study analyzes and evaluates the stator core loss density of an interior permanent magnet synchronous motor (IPMSM) by proposing and developing conceptual diagrams of an extended building factor while considering the nonlinearity of the magnetic properties of the material. The IPMSM, whose stator and rotor are composed of non-oriented electrical steel, is investigated. First, the motor is driven by a three-phase inverter with the pulse width modulation (PWM) excitation method and then with the threephase sinusoidal excitation technique at a rotational speed of 1500 rpm in each condition. The calculation procedure of the stator core loss of the IPMSM is improved from our previous method. The finite element method (FEM) is used to support the identification and computation of motor iron losses, where the PWM carrier frequency is 10 kHz. In addition, experimental results of the extended building factor diagrams for the ring and IPMSM cores under the sinusoidal and inverter excitations are shown and discussed. The main objectives of this study are to investigate and clarify the reasons for increasing the IPMSM stator core loss density owing to the effects of the core shapes and two excitation methods, as well as to thoroughly identify the dominant impact between the core shape and excitation method on the increase in the iron loss density. Furthermore, based on the extended building factor, particular values of the IPMSM stator and rotor core losses in the experiment can be relatively separated and determined.

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Section: Appendix 1 Explanation Of Initial Rotor Angle In Fea Modelmentioning

confidence: 99%

Conceptual Diagrams of Extended Building Factor for Analysis and Evaluation of Factors on Core Loss Density Increase in IPMSM

et al. 2023

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“…In this paper, the proposed machines employ a different method to flux-weakening by intentionally creating a leakage flux path, which is a narrow path linked to two tops of adjacent poles [17][18][19]. The leakage flux can be controlled by q-axis current.…”

Section: Introductionmentioning

confidence: 99%

Multi-Objective Optimal Design and Analysis of Variable Leakage Flux Ipm Motors for Improve Flux-Weakening Ability

Liu¹,

Guo²,

Du³

et al. 2021

PIER C

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In this paper, two variable leakage flux permanent magnet (VLFPM) machines are proposed. The keys are to adopt the rotor with single-layer and double-layer PMs and intentionally create leakage flux paths to extend the operating speed range and increase the machine efficiency. The characteristics of the variable leakage flux of the proposed machines are investigated. In order to improve the performances of the VLFPM machines, the Multi-Objective Genetic Algorithm (MOGA) method is applied for achieving the multi-objective optimizations of variables. Then, the performances of the double-layer permanent magnet variable leakage flux motor (DLPM-VLFM) and the singlelayer permanent magnet variable leakage flux motor (SLPM-VLFM) are analyzed and compared with conventional interior PM machine (CIPMM) in detail. The performances mainly include flux linkage and torque, flux-weakening capability and efficiency. Finally, it is shown by analysis and comparison that the DLPM-VLFM can have a wider range of speed and high efficiency.

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“…The motor has a leakage flux path between magnet poles, and the leakage flux of the path can be controlled by the q-axis current [22]. At the rated speed, the q-axis current is increased to reduce the leakage flux and thus improve the output torque; at the high speed, the leakage flux path is used to reduce the air gap magnetic density, so as to improve flux-weakening ability and reduce flux-weakening current [23].…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of Variable Leakage Flux Flux-Intensifying Motor for Improve Flux-Weakening Ability

Liu¹,

Guo²,

Zhu³

et al. 2021

PIER M

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This paper presents a novel variable leakage flux flux-intensifying motor (VLF-FIM) to improve flux-weakening ability. The innovation lies in the variable leakage flux property and the characteristic of L d > L q . The two characteristics can be achieved by the adoption of magnetic barriers and magnetic bridges. Consequently, the flux-weakening ability is enhanced. Then, the topology structure and operation principle of the proposed machine are introduced. Based on the two-dimensional finite element method (2DFEM), the performances of the proposed motor are analyzed and compared with the conventional interior permanent magnet motor (CIPMM) in detail. The performances mainly include torque, flux-weakening ability, constant power speed range (CPSR), irreversible demagnetization risk of the PM, structural strength, etc. Finally, the results show that the proposed motor has some advantages, such as good flux-weakening ability, a wide constant power range, and a large high-efficiency area. In addition, it verifies the effectiveness of the proposed method in improving the flux-weakening ability of the motor.

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Study and experimental performance evaluation of flux intensifying PM motor with variable leakage magnetic flux

Cited by 8 publications

References 19 publications

Conceptual Diagrams of Extended Building Factor for Analysis and Evaluation of Factors on Core Loss Density Increase in IPMSM

Conceptual Diagrams of Extended Building Factor for Analysis and Evaluation of Factors on Core Loss Density Increase in IPMSM

Multi-Objective Optimal Design and Analysis of Variable Leakage Flux Ipm Motors for Improve Flux-Weakening Ability

Design and Analysis of Variable Leakage Flux Flux-Intensifying Motor for Improve Flux-Weakening Ability

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