- منطقة بودونغ الجديدة ، شنغهاي ، الصين .
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Electric machines with rare-earth magnets have the highest efficiency and power density. However, rare-earth magnets are expensive, and their manufacturing process, as well as mining rare-earth raw materials, is harmful for the environment. Therefore, developing energy-efficient electric machines without rare-earth magnets is …
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Permanent Magnet Assisted Synchronous Reluctance Machines (PMASynRM) provide a low-cost alternative to the Surface PM Machines due to the use of relatively lower grades of rare-earth (RE) or RE-free magnets, as the performance degradation due to weaker magnets is compensated by the presence of reluctance …
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There has been growing interest in electrical machines that reduce or eliminate rare-earth material content. Traction applications are among the key applications where reducing cost and, hence, reduction of rare-earth materials are key requirements. This paper will assess the potential of different variants of flux-switching machines …
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In 1945, scientists constructed ENIAC, the world's first programmable, general purpose digital computer (SN: 2/23/46, p. 118). Nicknamed the "Giant Brain," ENIAC weighed more than four elephants and had a footprint roughly two-thirds the size of a tennis court. Less than 80 years later, the …
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We employ a combination of machine learning and first-principles calculations to predict magnetic properties of rare-earth lean magnets. For this purpose, based on a training set constructed out of experi-mental data, the machine is trained to make predictions on magnetic transition temperature (T c), largeness of saturation magnetization (μ 0M
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A bstract-Rare-earth-permanent-magnet excitation can provide considerable improvement in the energy efficiency of electrical machines. Tolerating motor terminal short circuit and avoiding magnet irreversible demagnetization must be studied during the design and prototyping stage of a permanent-magnet motor. Electrical machinery design …
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This paper proposes two high-performance switched flux hybrid magnet memory machines (SF-HMMMs) based on the design concepts of E-core and C-core SF permanent magnet (PM) machine topologies. Since two kinds of PMs (i.e., NdFeB and low coercive force magnets) are employed, the proposed machines can offer the merits of …
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Important global efforts are underway toward lowering the cost of electric machines for electric and hybrid vehicles by reducing or eliminating the use of rare earth materials which have been experiencing significant price increases and volatility. This paper will present several designs that reduce or eliminate rare-earth materials.
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Found in the Earth's crust, rare earths are critical elements used in cars, consumer electronics, computers, communications, clean energy and defense systems. There are 17 elements that are considered to be rare earth elements (REE). Fifteen of those elements are in the lanthanide series and two additional elements share similar …
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This article proposed a novel hybrid permanent magnet machine (HPMM) with less rare earth material and offset interior permanent magnet (IPM) that designs location and dimension of permanent magnet for torque density enhancement and torque pulsating suppression. The conventional HPMM-I and the proposed HPMM-II are designed and …
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All EMI drawer magnets are available in stainless steel and now with rare earth cartridges! Drawer magnets provide valuable protection for injection molding machines, molds and dies. Mounted on the throat of the molding machine, tramp metal is stopped from flowing into the machine by powerful rare earth magnets.
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Automotive applications require electrical machines designed for high torque density, wide speed range, and low cost. NdFeB magnets can achieve a high torque density and wide speed range, and however, they have a high cost. Therefore, this article explores the capability of rare-earth-free (REF) design through a PM-assisted …
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• Quickly develop design models of new machine topologies (i.e. non-rare-earth machines) • Rigorously compare alternative machine topologies via Pareto-optimal fronts MoM is a numerical technique that can be used to model low frequency electromagnetic behavior. It holds promise as a tool to enhance the team's ability to perform these tasks.
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This article is a contribution to answer the following question: Is it possible to design a permanent magnet machine with the performance expected from rare-earth magnets but at a lower cost? Performance being understood as torque, size, efficiency, demagnetization, and temperature rise together. The question is addressed with a …
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High power density and high torque density are the fundamental requirements for electric machines used in traction application. The former is obtained by potentially increasing the speed of the machine while the latter by using high energy density rare earth magnets. Ferrite magnets are explored as a viable alternative to rare earth magnets which are …
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Visible-light photocatalytic activity of rare-earth-metal-doped TiO 2: Experimental analysis and machine learning for virtual design. ... Modification with rare-earth (RE) metals has emerged as an important approach for enhancing the properties of titanium dioxide.
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A proper control of phase stability and microstructures has direct impact on mitigating REE supply risk. Compared to rare earth PMs, non-rare earth (non-RE) PMs typically have lower maximum energy products, however, given their small supply risks and low cost, they are being intensively investigated for less-demanding applications.
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