Electromagnetic and Structural Design of a Novel Low-Speed High-Torque Motor With Dual-Stator and PM-Reluctance Rotor

Zhang, Zhaoyu; Yu, Siyang; Zhang, Fengge; Wang, Xiuhe

doi:10.1109/tasc.2020.2977286

Cited by 13 publications

(8 citation statements)

References 12 publications

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“…Through the iteration and calculation of 14 structural parameters, the optimized machine obtains the higher average output torque (is increased from 115 to 125 Nm) and efficiency (is improved from 88.5% to 89.6%) compared with the original machine, while the peak-to-peak value of torque ripple is reduced from 9.1 to 2.8 Nm. Another solution for the design and modeling of dual-stator machines is that the machine is divided into inner and outer machines and they are designed separately [9,10]. Then the two machines are combined into a whole for simulation and optimization to obtain the final design.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Design of a Dual‐Stator Low‐Speed High‐Torque Permanent Magnet Drive Machine for the Ball Mill Application

Liu

et al. 2023

IEEJ Transactions Elec Engng

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The dual‐stator permanent magnet (PM) machine has the advantages of high torque density, high efficiency, and compact size, which makes it suitable for low‐speed high‐torque applications. A dual‐stator low‐speed high‐torque permanent magnet drive machine (DLHPMDM) is discussed and studied in this paper, which is applied to the ball mill application. First, in order to meet the requirements of high efficiency and high reliability, a DLHPMDM with the inner and outer windings connected in parallel is obtained through the designs carried out in terms of the magnetic circuit structure, structural size, and the pole‐slot number combination. However, for the DLHPMDM with the inner and outer windings connected in parallel, the power allocation between the inner and outer machines is a critical problem that needs to be accurately analyzed, and the circulating current between the two sets of windings is also a particular issue that merit attention. Therefore, a new modeling method is proposed for the DLHPMDM to solve such cases more accurately. The proposed new method combines the advantages of the rapidity of the finite element analysis (FEA) with current excitations and the accuracy of the FEA with voltage excitations. Finally, a prototype of the DLHPMDM is manufactured and tested. The feasibility of the design theory and the validity of the proposed modeling method is verified by both the tested and simulated results. © 2023 Institute of Electrical Engineer of Japan and Wiley Periodicals LLC.

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Section: Introductionmentioning

confidence: 99%

Modeling and Design of a Dual‐Stator Low‐Speed High‐Torque Permanent Magnet Drive Machine for the Ball Mill Application

Liu

et al. 2023

IEEJ Transactions Elec Engng

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“…The PMTM can be directly connected to a load without a gearbox and can operate stably at low-speed or in locked-rotor conditions [1][2][3]. It has the merits of low-speed, high torque density, fast response speed, high precision control and small torque ripple and is widely used in many fields, such as aerospace, micro electric platforms and microrobot joint and weapon equipment of artillery follow-up systems [4][5][6]. Therefore, many researchers have conducted in-depth studies on low-speed and large torque PMTMs.…”

Section: Introductionmentioning

confidence: 99%

Research on a Limit Analytical Method for a Low-Speed Micro Permanent Magnet Torque Motor with Back Winding

et al. 2022

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The conventional permanent magnet torque motor (PMTM) is slotted on the inner surface of the stator core. When the size of the stator core is small, the winding coils are difficult to embed into the slots. To solve the problem, a novel PMTM is presented, which is slotted on the outer surface of the stator core. As a result, the winding coils can be conveniently embedded into the slots from the outer surface of the stator core. The novel structure of the PMTM with back winding (BWPMTM) is introduced, and the advantage of the novel structure is analyzed. Furthermore, this paper proposes a limit analytical method to solve the optimal parameters of the motor which comprehensively considers four constraints: no-load back electromotive force (EMF), torque, temperature and slot space factor. The optimal parameters of the motor are directly solved to maximize torque density within the constrained range. This method avoids repeated iterative processes and greatly reduces the amount of calculation for PMTM design. Electromagnetic performance and thermal performance are analyzed based on the finite element model (FEM). Finally, the building of a prototype and the experimental results obtained with it are discussed. The rationality of the novel structure and the limit analytical method are verified.

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“…With the continuous improvement of process production technology and design theory, permanent magnet motors have received more and more attention [1]. Particularly, the application prospect of the low‐speed high‐torque electric spindle permanent magnet synchronous motor in the machine tool and processing industry can be seen more frequently than ever before [2]. The cogging torque, torque ripple, noise and other properties of permanent magnet motors are highly related to the air‐gap magnetic flux waveform.…”

Section: Introductionmentioning

confidence: 99%

Analysis on an Interior Permanent Magnet Synchronous Machine with a Non‐uniform Halbach Array

Tan

et al. 2021

IEEJ Transactions Elec Engng

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Halbach array has been more frequently used in the field of electromagnetism in recent days because of some unique advantages such as the self‐shielding and sinusoidal field distribution. In order to reduce the impact of the high order harmonic content of the air‐gap flux density of the interior permanent magnet synchronous motor (IPMSM) on the performance of the machine, a new non‐uniform Halbach array structure is proposed in this paper. Firstly, an equivalent analytical model is established to analyze the influence on the air‐gap flux density. At the same time, the interior permanent magnet synchronous motor model is built by using the finite element analysis. Then, the relationship between the air‐gap flux density and the four design parameters (the thickness of the permanent magnet, the magnetization angle, the angle of the permanent magnet, and the proportion of auxiliary magnetic poles) is analyzed by using the Taguchi method orthogonal experiment. The total harmonic distortion (THD) of air‐gap magnetic fields and its fundamental harmonic amplitude are employed as the evaluation criteria. Finally, the effectiveness of this optimization method is verified by comparing the harmonic content of the air‐gap flux density before and after the optimization. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

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Electromagnetic and Structural Design of a Novel Low-Speed High-Torque Motor With Dual-Stator and PM-Reluctance Rotor

Cited by 13 publications

References 12 publications

Modeling and Design of a Dual‐Stator Low‐Speed High‐Torque Permanent Magnet Drive Machine for the Ball Mill Application

Modeling and Design of a Dual‐Stator Low‐Speed High‐Torque Permanent Magnet Drive Machine for the Ball Mill Application

Research on a Limit Analytical Method for a Low-Speed Micro Permanent Magnet Torque Motor with Back Winding

Analysis on an Interior Permanent Magnet Synchronous Machine with a Non‐uniform Halbach Array

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