Study of high torque density interior permanent magnet synchronous motor with flexible orientation Nd&lt;inf&gt;2&lt;/inf&gt;Fe&lt;inf&gt;14&lt;/inf&gt;B sintered magnet

Akune, R.; Akatsu, Kan; Fujihara, Motoharu; Yamamoto, Takao A.

doi:10.1109/icelmach.2016.7732584

Cited by 7 publications

(5 citation statements)

References 8 publications

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“…In this case, the torque density will be the main subject of interest, i.e., torque per motor volume. Additionally, the two main requirements for electric motors are the high-torque density and high efficiency, as saving energy is the main focus in the world [97].…”

Section: Machines With Eccentric Airgapsmentioning

confidence: 99%

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High-Torque Electric Machines: State of the Art and Comparison

Alibeik

Santos

2022

Machines

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The state of the art of high-torque electric motors has been reviewed in this paper. This paper presents a literature review of high-torque density electric machines based on their airgap classifications, which brings a unique consideration to new design ideas to increase torque density. Electric machines are classified into three main groups based on their airgap configuration, i.e., (1) machines with a constant airgap, (2) machines with a variable airgap, and (3) machines with an eccentric airgap. This paper also presents the modeling of a high-torque airgap-less electric motor based on the concept of eccentric airgap. The torque density of this motor has been compared to motors available in the literature review. Among electrical motors with no permanent-magnet, airgap-less electric motors take the lead in terms of torque density, which is almost five times greater than the next motor, “in-wheel for electric vehicle”.

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Section: Machines With Eccentric Airgapsmentioning

confidence: 99%

“…In other words, the rotor is attracted to the stator at the points of excitation. The pole excitation of the airgap-less electric motor has been discussed by the authors in detail in [95][96][97][98]. It is worth mentioning that the bipole excitation mode has been used in this motor.…”

Section: Comparison Of Airgap-less Electric Motors With a Switched-re...mentioning

confidence: 99%

High-Torque Electric Machines: State of the Art and Comparison

Alibeik

Santos

2022

Machines

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“…We conclude that the motors that are currently installed in EV propulsion systems mainly consists of the PMSM, IM, and SRM. Among them, the PMSM has become the first choice of EV manufacturers due to the high torque and high power density enabled by high-energy-density PMs (neodymium Fe boron (NdFeB) and samarium cobalt (SmCo)) [8][9][10][11]. The PMSM is divided into the internal-PMSM and the surface-PMSM.…”

Section: Current Challenges Of Ev Motorsmentioning

confidence: 99%

Challenges Faced by Electric Vehicle Motors and Their Solutions

et al. 2021

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“…With the rapid development of power electronic technology, microelectronic technology and automatic control theory, permanent magnet synchronous motors have been widely applied in electric vehicles, biped robots and other fields due to low torque ripple, high efficiency, high power factor and so on [1][2][3]. Moreover, high torque density is urgently required for various applications such as biomedical devices and electric vehicles to obtain higher efficiency drive [4,5]. Thus, achieving higher torque density is always one of the emphases of research.…”

mentioning

confidence: 99%

A novel high torque density six‐phase axial‐flux permanent magnet synchronous motor with 60° phase‐belt toroidal winding configuration

Feng

Nie

et al. 2021

IET Electric Power Appl

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The three‐phase permanent magnet synchronous motor (three‐phase PMSM) has gained much popularity in many applications due to its various advantages. In addition, due to the good fault tolerance, simple inverter circuit structure and high torque density, the six‐phase PMSM has better prospects than three‐phase PMSM in biomedical devices, electric vehicles and other fields with high reliability requirements. In this study, a six‐phase axial‐flux PMSM inherently without cogging torque is proposed to improve torque density, which equips the 60° phase‐belt toroidal winding (60°TW) and slotless stator core. Based on the same effective volume, permanent magnet material, power grade and the other major motor parameters, two six‐phase PMSMs with 30° phase‐belt toroidal winding (30°TW) and 60°TW are designed, respectively. The armature reaction field, air gap magnetic density, back‐electromotive force, output torque, loss characteristic and torque‐speed characteristic are compared by using three‐dimensional (3D) finite‐element models in detail. Finally, the experimental test is carried out using the prototype of three‐phase PMSM with 120° phase‐belt toroidal winding. The experimental results indirectly verify the feasibility of 60° phase‐belt toroidal winding and correctness of 3D FEM. The 3D FEM analysis results are presented to show that torque density of the proposed six‐phase PMSM with 60°TW is improved in comparison to the six‐phase PMSM with 30°TW. Index Terms—60° phase‐belt toroidal winding, axial flux, six‐phase permanent magnet synchronous motor, torque density

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Study of high torque density interior permanent magnet synchronous motor with flexible orientation Nd<inf>2</inf>Fe<inf>14</inf>B sintered magnet

Cited by 7 publications

References 8 publications

High-Torque Electric Machines: State of the Art and Comparison

High-Torque Electric Machines: State of the Art and Comparison

Challenges Faced by Electric Vehicle Motors and Their Solutions

A novel high torque density six‐phase axial‐flux permanent magnet synchronous motor with 60° phase‐belt toroidal winding configuration

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