Magnet Shape Optimization of Surface-Mounted Permanent-Magnet Motors to Reduce Harmonic Iron Losses

Chai, Feng; Liang, Peidong; Pei, Yulong; Cheng, Shijie

doi:10.1109/tmag.2016.2524010

Cited by 43 publications

(25 citation statements)

References 12 publications

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“…The machine was simulated at the peak speed. In PM synchronous machines, the stator space harmonics and PWM harmonics induce surface currents on the permanent magnets [18][19][20]. This can increase the temperature of the magnets which in turn decreases their remanence.…”

Section: B Magnet Lossesmentioning

confidence: 99%

Optimisation of Permanent Magnet Machine Topologies Suitable for Solar Powered Aircraft

Ullah

Kimiabeigi

Scholes

et al. 2018

2018 XIII International Conference on Electrical Machines (ICEM)

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Electrification of aircraft has become a hot topic in recent years both in civil aviation and unmanned aerial vehicles. The latter domain is gaining in popularity for its high altitude applications, particularly for bringing widespread internet coverage. This paper presents the work done on the optimisation of different types and topologies of permanent magnet electrical machines that can be considered as the main contenders for such application. These topologies consist of both laminated steel core and airgap winding machines. Instead of copper, compressed aluminium windings were considered which will help in reducing the overall mass of the stator. All the topologies were simulated both under takeoff and cruise condition. Each machine had to fulfil a certain thermal constraint (current density) before being simulated at cruise condition in order to find the objective function of the final design. The best topology was chosen based on high efficiency in cruise condition with reduced mass.

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Section: B Magnet Lossesmentioning

confidence: 99%

Optimisation of Permanent Magnet Machine Topologies Suitable for Solar Powered Aircraft

Ullah

Kimiabeigi

Scholes

et al. 2018

2018 XIII International Conference on Electrical Machines (ICEM)

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“…Iron losses including hysteresis loss, EC loss and excess loss are generated in the stator and rotor owing to the change of magnetic fields [15]. In addition, due to cogging effect and ample magnetomotive force (MMF) harmonics in BSPM machines, magnet EC loss does exist in BSPM machines [16][17][18]. Besides, copper loss will also be generated in the stator windings [19].…”

Section: Torque Loss and Thermal Analysismentioning

confidence: 99%

Design and Analysis of a Bearingless Permanent-Magnet Machine With Improved Torque Density for Stirred Tank Bioreactor

Zhang¹,

Huang²,

Yuan³

et al. 2017

PIER M

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A novel bearingless stirring permanent-magnet (PM) (BSPM) machine is proposed in this paper, which can offer high torque density, high efficiency, simple structure, and low cost. The novelty of the proposed machine is to provide a clean environment and no pinch-off areas in a stirred tank bioreactor and integrate appropriate magnetization directions of the PMs in the rotor. Firstly, the topology and operational principle of the proposed machine are described in detail. Then, the machine is designed for a given set of specifications, and its electromagnetic performances are analyzed by timestepped transient finite-element method (FEM). Next, after the analysis of loss, a thermal simulation is established, complying with the design requirements. Finally, the efficiency and power factor map of the proposed BSPM machine are simulated for validation.

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“…In [16], an improved analytical method for calculating the magnetic field and cogging torque of surface mounted PMSM with arbitrary eccentric rotor shape is proposed, which can greatly reduce the harmonic content of radial flux density. Reference [17] presents a new shape optimization method for permanent magnets based on the magnetic field distribution of nonuniform permanent magnets, which is used for reducing the harmonic and iron loss of magnetic field. In [18], two IPM rotor topologies in electric vehicles have been designed and analyzed, and it is concluded that dual-U shape has good torque performance, superior controllability performance, and small mechanical stress.…”

Section: Introductionmentioning

confidence: 99%

A Method of Reducing Air-Gap Harmonic of Permanent Magnet Motor for Fitness Car

Zang¹,

Wang²,

Jing³

2019

PIER Letters

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In order to solve the high harmonic content of permanent magnet synchronous motor (PMSM) for fitness car, a PMSM with built-in permanent magnet bridge is proposed in this paper. Compared with surface mounted permanent magnet synchronous motor (SM-PMSM), the proposed motor with permanent magnet bridge structure has lower harmonic content. The performance and magnetization angle of the proposed motor are compared and analyzed in detail. The results obtained from finite element analysis show that the permanent magnet bridge can increase the air gap magnetic field intensity, and different directions of magnetization will affect the amplitude of fundamental wave of air gap magnetic density. Moreover, it can reduce the total harmonic distortion (THD) and make the magnetic density waveform more sinusoidal. It is very beneficial to the smooth output of torque of fitness car.

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Magnet Shape Optimization of Surface-Mounted Permanent-Magnet Motors to Reduce Harmonic Iron Losses

Cited by 43 publications

References 12 publications

Optimisation of Permanent Magnet Machine Topologies Suitable for Solar Powered Aircraft

Optimisation of Permanent Magnet Machine Topologies Suitable for Solar Powered Aircraft

Design and Analysis of a Bearingless Permanent-Magnet Machine With Improved Torque Density for Stirred Tank Bioreactor

A Method of Reducing Air-Gap Harmonic of Permanent Magnet Motor for Fitness Car

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