New SMC Materials for Small Electrical Machine With Very Good Mechanical Properties

Grande, Marco Actis; Ferraris, Luca; Franchini, Fausto; Pošković, Emir

doi:10.1109/tia.2017.2756593

Cited by 32 publications

(10 citation statements)

References 34 publications

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“…6). The effect of the oxygen content affects a lot the iron losses; for instance, for a ferromagnetic powder very similar to Powder B (same granulometry) but with a lower oxygen content (0.02% in weight) presented in a recent work [25], the iron losses are lower of about 5% with respect to SMC B using the same layer and compacting pressure.…”

Section: Experimental Materials and Proceduresmentioning

confidence: 99%

“…The following powders have been chosen: Powder A (average grain value: 45 μm and oxygen content 0.5% in weight), Powder B (average grain value: 150 μm and oxygen content 0.06 wt %) and Powder C (average grain value: 425 μm and oxygen content 0.25 wt %). In this research a phenolic resin, already adopted in previous works [21], [25] has been used. Iron powders have been admixed with 0.2% wt of the resin.…”

Section: Experimental Materials and Proceduresmentioning

confidence: 99%

“…Samples obtained were undergoing the same characterization as the resin added materials. The magnetic characterization was performed at room temperature through a magnetic toroidal test [21], [25], [26]. The measuring system provides a controlled sinusoidal voltage waveform with very low harmonic distortion, without an excessive sample heating -even at high amplitudes -avoiding the need of an additional cooling system.…”

Section: Experimental Materials and Proceduresmentioning

confidence: 99%

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Effect of Granulometry and Oxygen Content on SMC Magnetic Properties

Pošković¹,

Franchini²,

Grande

et al. 2017

Acta Metall Slovaca

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The interest around the adoption of Soft Magnetic Composite materials (SMC) in the realization of electric machines, or parts of electric machines, is continuously increasing. The main reason lies on the opportunity to realize magnetic circuits following a 3D design procedure, which is not allowed with the adoption of the traditional lamination sheets. This is not the only reason, as a lot of research is being carried out on the losses distribution in the magnetic material, particularly as function of the frequency. In this paper different iron powders have been analyzed to investigate the impact of the granulometry on the SMC performance; in particular the grain size and the oxygen content have been considered variable parameters. The materials, prepared, compacted and tested in our laboratories, have been characterized to obtain the magnetic characteristic and information about the iron losses.

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Section: Experimental Materials and Proceduresmentioning

confidence: 99%

Section: Experimental Materials and Proceduresmentioning

confidence: 99%

Section: Experimental Materials and Proceduresmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Granulometry and Oxygen Content on SMC Magnetic Properties

Pošković¹,

Franchini²,

Grande

et al. 2017

Acta Metall Slovaca

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“…They are also used in the heated die during compaction [123]. Various ferromagnetic powders can be coated with epoxy resin [124,125]. Particles size [20], resin content [126], and molding pressures [127] strongly impact the SMCs performances.…”

Section: Epoxy Resinsmentioning

confidence: 99%

Recent Advances in Multi-Functional Coatings for Soft Magnetic Composites

et al. 2021

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During the past 50 years, the aim to reduce the eddy current losses in magnetic cores to a minimum led to the formulation of new materials starting from electrically insulated iron powders, today called Soft Magnetic Composites (SMC). Nowadays, this promising branch of materials is still held back by the mandatory tradeoff between energetic, electrical, magnetic, and mechanical performances. In most cases, the research activity focuses on the deposition of an insulating/binding layer, being one of the critical points in optimizing the final composite. This insulation usually is achieved by either inorganic or organic layer constituents. The main difference is the temperature limit since most inorganic materials typically withstand higher treatment temperatures. As a result, the literature shows many materials and process approaches, each one designed to meet a specific application. The present work summarizes the recent advances in state of the art, analyzing the relationship among material compositions and magnetic and mechanical properties. Each coating shows its own processing sets, which vary from simple mechanical mixing to advanced chemical methods to metallurgical treatments. From state of the art, Aluminum coatings are characterized by higher current losses and low mechanical properties. In contrast, higher mechanical properties are obtained by adopting Silicon coatings. The phosphates coatings show the best-balanced overall properties. Each coating type was thoroughly investigated and then compared with the literature background highlighting. The present paper thus represents a critical overview of the topic that could serve as a starting point for the design and development of new and high-performing coating solutions for SMCs. However, global research activity continuously refines the recipes, introducing new layer materials. The following steps and advances will determine whetherthese materials breakthrough in the market.

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“…Taking advantage of the powder metallurgy technology, the SMC cores can be produced by molding technology [1,[7][8][9]. This kind of technology can be used to produce SMC cores with complex structures that may be hard or even impossible to manufacture by the traditional lamination method [10]. There are two main steps in this technology, powder compaction and heat treatment.…”

Section: Introductionmentioning

confidence: 99%

Robust Design of a Low-Cost Permanent Magnet Motor with Soft Magnetic Composite Cores Considering the Manufacturing Process and Tolerances

Liu

Lei

et al. 2018

Energies

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This paper uses the Taguchi method to optimize the manufacturing process and robust design of a low-cost permanent magnet motor with soft magnetic composite (SMC) cores. For the manufacturing process, SMC cores are produced by using the molding technology without any wire cutting costs. To maximize the relative permeability and minimize the core loss, the Taguchi method is employed to identify the best control factor values for the heat treatment of SMC cores based on a series of experimental results. Due to the manufacturing tolerances, there are significant uncertainties in the core densities and motor dimensions, which will result in big performance variations for the SMC motors in the batch production. To obtain a robust design less sensitive to these tolerances, the conventional Taguchi parameter design method and a sequential Taguchi optimization method are presented to maximize the average torque and minimize the core loss of a low-cost PM motor. Through comparison, it is found that the proposed optimization method is efficient. It can provide an optimal design with better motor performance and manufacturing quality. The proposed method will benefit the industrial production of cost-effective PM-SMC motors with robust and compact designs.

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New SMC Materials for Small Electrical Machine With Very Good Mechanical Properties

Cited by 32 publications

References 34 publications

Effect of Granulometry and Oxygen Content on SMC Magnetic Properties

Effect of Granulometry and Oxygen Content on SMC Magnetic Properties

Recent Advances in Multi-Functional Coatings for Soft Magnetic Composites

Robust Design of a Low-Cost Permanent Magnet Motor with Soft Magnetic Composite Cores Considering the Manufacturing Process and Tolerances

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