Comparison between Space Mapping and Direct FEA Optimizations for the Design of Halbach Array PM Motor

Pérez, Ramón; Pelletier, Alexandre; Grenier, Jean-Michel; Cros, J.; Rancourt, David; Freer, Richard

doi:10.3390/en15113969

Cited by 3 publications

(2 citation statements)

References 26 publications

(49 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Consequently, the use of this technology is limited to special applications, where performance cannot be degraded in favour of costs. In order to overcome these issues, the most common and cheap solution applied in industry is segmented magnetization, which consists of dividing the magnet into several segments, which are magnetized to reproduce a normal flux density component as close as possible to a sine wave [3][4][5]. However, a closed-form analytical model of the air-gap field resulting from this configuration is not available in the literature.…”

Section: Introductionmentioning

confidence: 99%

A Novel Analytical Formulation of the Magnetic Field Generated by Halbach Permanent Magnet Arrays

Di Gerlando,

Negri,

Ricca

2023

Magnetism

View full text Add to dashboard Cite

This paper presents an analytical study of the air-gap magnetic field of a surface permanent magnet (SPM) linear, slot-less machine with a Halbach PM configuration, under the no-load condition. While other analytical formulations of the magnetic field generated by PMs are available, they exhibit some drawbacks, such as only providing a Fourier series, or being suitable to determine magnetic field average values, but not local magnetic field distributions. On the contrary, the proposed approach allows the determination of a unique, closed-form formulation for the slot-less machine air-gap field. This is obtained starting from the complex expression of the magnetic field of a conductor, inside the air gap, between two parallel smooth iron surfaces, obtained by means of the method of images. The magnetic field due to an infinitesimal conductor belonging to a current sheet is then integrated along a segment, providing the expression of the magnetic field due to the corresponding linear current density distribution, for current sheets perpendicular or parallel to the iron surfaces. Any Halbach PM segment disposition can, hence, be obtained via a suitable combination of field distributions generated by couples of current sheets with perpendicular and parallel orientation. Lastly, the no-load magnetic field expression with a Halbach array of PMs is retrieved. The proposed analytical model provides an accurate representation of the magnetic field distribution produced by any Halbach array, with an arbitrary number of segments and orientations. Additionally, the results obtained from the proposed analytical expressions are compared with FEM simulations realized by commercial software, and show an excellent agreement.

show abstract

Section: Introductionmentioning

confidence: 99%

A Novel Analytical Formulation of the Magnetic Field Generated by Halbach Permanent Magnet Arrays

Di Gerlando,

Negri,

Ricca

2023

Magnetism

View full text Add to dashboard Cite

show abstract

“…As a consequence, physics-based models feature enhanced generalization capability [70]. The most popular modeling technique utilizing physics-based surrogates is arguably space mapping (SM) [71][72][73][74][75][76] along with its numerous variations such as aggressive [77], implicit [78], or frequency SM [79]. Still, the necessity to devise a problemdependent low-fidelity model significantly narrows down the application areas in which physics-based models may be utilized.…”

Section: Introductionmentioning

confidence: 99%

Cost-Efficient Two-Level Modeling of Microwave Passives Using Feature-Based Surrogates and Domain Confinement

Pietrenko-Dabrowska,

Koziel,

Zhang

2023

Electronics

View full text Add to dashboard Cite

A variety of surrogate modeling techniques has been utilized in high-frequency design over the last two decades. Yet, the curse of dimensionality still poses a serious challenge in setting up reliable design-ready surrogates of modern microwave components. The difficulty of the modeling task is only aggravated by nonlinearity of circuit responses. Consequently, constructing a practically usable surrogate model, valid across extended ranges of material, geometry, and operational parameters, is far from easy. As a matter of fact, conventional modeling techniques are merely capable of building models for microwave structures featuring a relatively small number of designable parameters within reduced ranges thereof. One possible way of mitigating these obstacles may be the employment of the recently proposed two-stage performance-driven modeling approach. Therein, the surrogate model domain is narrowed down to the section of the space where the vectors of adequate quality are located, thereby permitting significantly reducing the cost of acquiring the training data. Seeking even further cost reduction, this work introduces a novel modeling framework, which exploits problem-specific knowledge extracted from the circuit responses to achieve substantial cost-savings of training data acquisition. In our methodology, the modeling procedure targets response features instead of the complete responses. The response features are the characteristic locations of the circuit response, such as relevant minima or maxima over selected frequency bands. The dependency of the coordinates of the said features on circuit dimensions is considerably less nonlinear than is observed for the complete characteristics, which enables sizable reduction of the data acquisition cost. Numerical validation of our procedure involving three microwave structures corroborates its remarkable efficiency, which allows for setting design-ready surrogates using only a handful of samples.

show abstract

Effect of Magnetic Properties of Magnetic Composite Tapes on Motor Losses

et al. 2022

View full text Add to dashboard Cite

Alternating current (AC) copper losses in motors increase with carrier frequency of the pulse width modulation (PWM) and are further increased by leakage flux of the permanent magnet. Therefore, AC copper losses increase with motor speed. Conventional techniques for reducing AC copper losses tend to increase other losses. In this paper, AC copper loss was reduced by wrapping a magnetic tape made of a magnetic composite material around the winding. This method controlled the flux path through the winding. Magnetic composite materials are mixtures of magnetic powders and liquid resins whose magnetic properties can be manipulated by changing the combination and other factors. When Fe–Si–Al magnetic tape was wrapped around the winding, the AC copper loss was reduced by 40%. The loss was further reduced by optimizing the magnetic properties of the magnetic composite material. The AC copper loss was maximally reduced when the specific permeability was 100 and the saturation flux density was 1.6. Magnetic tapes composed of magnetic composite materials with high saturation flux density and specific permeability reduce the AC copper losses without increasing other losses in the motor.

show abstract

Comparison between Space Mapping and Direct FEA Optimizations for the Design of Halbach Array PM Motor

Cited by 3 publications

References 26 publications

A Novel Analytical Formulation of the Magnetic Field Generated by Halbach Permanent Magnet Arrays

A Novel Analytical Formulation of the Magnetic Field Generated by Halbach Permanent Magnet Arrays

Cost-Efficient Two-Level Modeling of Microwave Passives Using Feature-Based Surrogates and Domain Confinement

Effect of Magnetic Properties of Magnetic Composite Tapes on Motor Losses

Contact Info

Product

Resources

About