High-Performance Fault Tolerant Halbach Permanent Magnet Vernier Machines for Safety-Critical Applications

Xu, Liang; Zhao, Wenxiang; Ji, Jinghua; Fan, Xuejun

doi:10.1109/tmag.2016.2524541

Cited by 39 publications

(17 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Zhao et al proposed Halhach vernier PMFT machines for safety-critical applications. It was shown that, by using the Halhach array, the torque of the vernier PMFT machines are improved [109]. Also, their losses and efficiencies are reduced and improved, respectively.…”

Section: Flux Concentration Rotor Structurementioning

confidence: 99%

Overview of permanent-magnet fault-tolerant machines: Topology and design

Zhao

2018

Trans. Electr. Mach. Syst.

Self Cite

View full text Add to dashboard Cite

Permanent-magnet (PM) machines have attracted a lot of interest in various applications since they have the merits of high torque density, high power density and high efficiency. However, issue of poor fault tolerance of the conventional PM machines restricts their practical applications in the field of safety-critical applications, e.g. aerospace, electric vehicle, electrical propulsion and wind power generator applications. An enormous amount of work has been done to improve the faulttolerant capability of PM machines. This paper will review research work on PM fault-tolerant machines up-to-date, including modular design, short-circuit current limitation design, redundant design, ease of thermal dissipation of PM design, and torque enhancement design techniques. The work of this paper can provide some references for future studies and engineering applications of PM fault-tolerant machines for safety-critical applications.

show abstract

Section: Flux Concentration Rotor Structurementioning

confidence: 99%

Overview of permanent-magnet fault-tolerant machines: Topology and design

Zhao

2018

Trans. Electr. Mach. Syst.

Self Cite

View full text Add to dashboard Cite

show abstract

“…where B ag0 and B ag1 are expressed in (12) and (13), respectively. Only these magnetic field components contribute to the developed torque and induced back-EMF…”

Section: Generic Analysis Of Dr-af-cp-vpm Machinementioning

confidence: 99%

“…Many research works have been recently reported on the new VPM topologies, e.g. [11][12][13][14], modelling and analysis of operating characteristics, including back-EMF, torque and power factor (PF), e.g. [10,15,16].…”

Section: Introductionmentioning

confidence: 99%

Analysis and design considerations of an axial‐flux dual‐rotor consequent‐pole Vernier‐PM machine for direct‐drive energy conversion systems

Gorginpour

2019

IET Renewable Power Generation

View full text Add to dashboard Cite

The Vernier permanent-magnet (VPM) machine is known as high-torque and low-speed drive solution suitable for direct-drive applications such as electric-vehicles and wind-turbines. This study presents a high-efficiency axial-flux VPM machine with dual-rotor of consequent-pole topology and one yoke-less concentrated-winding stator. The consequent-pole VPM machine is a special VPM structure that introduces high torque-density as the conventional-VPM machine incorporating a significantly lower volume of PM material. The proposed machine represents desirable features of higher efficiency, improved reliability and lower weight and axial-length compared to the traditional motor-gearbox approach. These advantages are achieved due to: dual-PM rotors for appropriate forming the magnetic flux lines and increasing torque-to-weight ratio, yokelessstator for reducing flux path, concentrated winding with no overhang for reducing copper-loss, using rectangular-shaped copper conductors for increasing winding fill factor and selecting the core material from high-performance grain-oriented magnetic steel for reducing core-loss. After presenting the structure, the operating principles are discussed based on the magnetic flux behaviour and a quasi-3D magnetic-equivalent-circuit model is extracted. The accuracy of the analytical model is validated by comparing the results with the FE results. Finally, the effects of the design parameters on electromagnetic performance are analytically investigated by studying a 10 kW machine.

show abstract

“…Several studies on the modeling, design, fabrication, geometrical optimization and presenting new structures of radial flux, axial flux and linear VPM machines have been reported, e.g. [8][9][10][11][12][13][14]. However, the operating principles of the CP-VPM machine and comparison of its performance with other VPM structures are not discussed in the previous publications.…”

Section: Introductionmentioning

confidence: 99%

Design Modifications for Improving Modulation Flux Capability of Consequent-Pole Vernier-PM Machine in Comparison to Conventional Vernier-PM Machines

Gorginpour

2019

Scientia Iranica

View full text Add to dashboard Cite

The Vernier PM (VPM) machine is known as a high-torque and low speed drive solution suitable for direct-drive applications such as electric vehicles and wind turbines. The Consequent-Pole Vernier PM (CP-VPM) machine is a special structure of VPM that also introduces high torque density as the conventional VPM incorporating significantly lower volume of PM materials. Although many researches and experiment studies, especially in recent years, reported concerning the conventional structure, there are little publications on the CP-VPM machine. The paper presents the electromagnetic principles of modulation flux occurring in CP-VPM machine. The operating quantities are evaluated using analytical equations and compared with the conventional machine performance. It is concluded that the torque density and back-EMF are much larger than the conventional machine and the torque pulsation magnitude is lower. However, the power-factor is undesirably reduced due to higher spatial harmonics distortion of the CP rotor magnetic field and presence of magnetic field components that do not contribute in the flux modulation. Based on the spatial harmonic analysis, design modifications for enhancing the operational characteristics of the CP-VPM machine are proposed and their effectiveness is verified through comparing the 2D-FE results with the results of the conventional VPM machines.

show abstract

High-Performance Fault Tolerant Halbach Permanent Magnet Vernier Machines for Safety-Critical Applications

Cited by 39 publications

References 11 publications

Overview of permanent-magnet fault-tolerant machines: Topology and design

Overview of permanent-magnet fault-tolerant machines: Topology and design

Analysis and design considerations of an axial‐flux dual‐rotor consequent‐pole Vernier‐PM machine for direct‐drive energy conversion systems

Design Modifications for Improving Modulation Flux Capability of Consequent-Pole Vernier-PM Machine in Comparison to Conventional Vernier-PM Machines

Contact Info

Product

Resources

About