Consideration on Eddy Current Reduction Techniques for Solid Materials Used in Unconventional Magnetic Circuits

Mohammed, Ahmed M.; Galea, Michael; Cox, Tom; Gerada, Chris

doi:10.1109/tie.2018.2875641

Cited by 3 publications

(3 citation statements)

References 19 publications

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“…For the core of stator and rotor, there are two basic properties have to be considered involving the B-H curve and the iron losses [11]. Solid material or laminated material can be used for the core structure of the machine [27]. Laminated low silicon, soft alloy steel has been selected to construct the stator and rotor core.…”

Section: Materials Selectionmentioning

confidence: 99%

In-wheel, outer rotor, permanent magnet synchronous motor design with improved torque density for electric vehicle applications

Bdewi

Ali

Mohammed

2022

IJECE

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In electric vehicle applications, the torque density of electric motor plays an important role in improving the performance of the vehicle. The main objective of this paper is to investigate a possible method for improving the torque density of a permanent magnet synchronous motor used in electric vehicles. At the same time, other machine specifications were taken into account and kept within the acceptable level. This was achieved by incorporating performance enhancement strategies such as investigating ofhigh-efficient winding topology for the motor’s stator to give the highest winding factor and optimizing the machine dimensions to achieve the best performance. MagNet 7.4.1 software package with static and transient finite element method solver was used for implementing the proposed design. The results showed a significant improvement in the torque density with keeping the overall machine performance.

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Section: Materials Selectionmentioning

confidence: 99%

In-wheel, outer rotor, permanent magnet synchronous motor design with improved torque density for electric vehicle applications

Bdewi

Ali

Mohammed

2022

IJECE

Self Cite

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“…In order to reduce the eddy current loss of silicon steel sheet, it has been validated that a partial slitting along redial direction is efficient. The method aims to further increasing in the eddy current path [11]. Meanwhile, new magnetic material is also used to replace silicon steel sheet to reduce eddy current loss.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic performance analysis of flux-switching permanent magnet tubular machine with hybrid cores

Wang

Liu

Wang

et al. 2020

Trans. Electr. Mach. Syst.

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The performance of traditional flux switching permanent magnet tubular machine (FSPMTM) are improved by using new material and structure in this paper. The existing silicon steel sheet making for all mover cores or part of stator cores are replaced by soft magnetic composite (SMC) cores, and the lamination direction of the silicon steel sheet in stator cores have be changed. The eddy current loss of the machine with hybrid cores will be reduced greatly as the magnetic flux will not pass through the silicon steel sheet vertically. In order to reduce the influence of end effect, the unequal stator width design method is proposed. With the new design, the symmetry of the permanent magnet flux linkage has been improved greatly and the cogging force caused by the end effect has been reduced. Both 2-D and 3-D finite element methods (FEM) are applied for the quantitative analysis.Index Terms-Flux switching permanent magnet tubular machine, soft magnetic composite (SMC), hybrid cores, unequal width stator, finite element method (FEM).

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“…The industry has been expected to reduce induction loss in order to not only improve the power efficiency but to also cancel the steady state ripples resulting from the eddy currents. Previously, the researchers have focused on the this topic by topology or structural optimization approaches such as using an special spinning echo [13] and novel interface circuits [14].…”

Section: Introductionmentioning

confidence: 99%

A Nonlinear Circuit Analysis Technique for Time-Variant Inductor Systems

Wang

Song

et al. 2019

Sensors

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Time-variant inductors exist in many industrial applications, including sensors and actuators. In some applications, this characteristic can be deleterious, for example, resulting in inductive loss through eddy currents in motors designed for high efficiency operation. Therefore, it is important to investigate the electrical dynamics of systems with time-variant inductors. However, circuit analysis with time-variant inductors is nonlinear, resulting in difficulties in obtaining a closed form solution. Typical numerical algorithms used to solve the nonlinear differential equations are time consuming and require powerful processors. This investigation proposes a nonlinear method to analyze a system model consisting of the time-variant inductor with a constraint that the circuit is powered by DC sources and the derivative of the inductor is known. In this method, the Norton equivalent circuit with the time-variant inductor is realized first. Then, an iterative solution using a small signal theorem is employed to obtain an approximate closed form solution. As a case study, a variable inductor, with a time-variant part stimulated by a sinusoidal mechanical excitation, is analyzed using this approach. Compared to conventional nonlinear differential equation solvers, this proposed solution shows both improved computation efficiency and numerical robustness. The results demonstrate that the proposed analysis method can achieve high accuracy.

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Consideration on Eddy Current Reduction Techniques for Solid Materials Used in Unconventional Magnetic Circuits

Cited by 3 publications

References 19 publications

In-wheel, outer rotor, permanent magnet synchronous motor design with improved torque density for electric vehicle applications

In-wheel, outer rotor, permanent magnet synchronous motor design with improved torque density for electric vehicle applications

Electromagnetic performance analysis of flux-switching permanent magnet tubular machine with hybrid cores

A Nonlinear Circuit Analysis Technique for Time-Variant Inductor Systems

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