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Author

Do Qui Duyen

Bio: Do Qui Duyen is an academic researcher from Vietnamese-German University. The author has contributed to research in topics: Deposition (phase transition) & Rotor (electric). The author has co-authored 2 publications.

Papers
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DOI
01 Jan 2022
TL;DR: In this paper, a new approach for metal 3D printing, called bound powder deposition, is introduced, and several specimens manufactured by the method are then conducted for experimental works, where the crystal structure of the printed part is investigated.
Abstract: This research focuses on introduction and evaluation of machine parts manufactured by bound powder deposition method, a new approach in metal 3D printing. After a review of metal 3D printing technology, a new approach for metal printing, called bound powder deposition, is introduced. Several specimens manufactured by the bound powder deposition are then conducted for experimental works. In the experimental works, the crystal structure of the printed part is investigated. In addition, typical mechanical proprieties of the printed part produced by the bound powder deposition are tested and compared with other those produced by other 3D printing and metallurgy methods.

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Proceedings ArticleDOI
01 Jun 2023
TL;DR: Li et al. as mentioned in this paper proposed a PM-electromagnet brake with rolling balls embedded in the friction plate, which has significant advantages of higher torque-to-size ratio, lower power consumption and quicker brake response speed.
Abstract: This paper proposes a novel PM-electromagnet brake with rolling balls embedded in the friction plate, which has significant advantages of higher torque-to-size ratio, lower power consumption and quicker brake response speed. The structural innovations of the proposed brake are mainly reflected in the following two aspects: 1. The torque springs are replaced by high-performance PMs to reduce power consumption during Brake-Holding Mode; 2. Rolling-balls are embedded in the friction plate to increase the braking torque. In addition, an optimized brake circuit is designed to improve the brake response speed by shortening the inductor discharging time. Firstly, the structural innovations of proposed brake are presented and discussed in detail. Then, theoretical analysis mainly focuses on the following two aspects: 1. How the rolling ball-embedded structure can improve the torque-to-size ratio; 2. How the distributed PMs can reduce the power consumption during Brake-Holding Mode. At last, the optimized brake circuit is given. To verify the benefits of the design, a proposed brake prototype is manufactured, as well as the optimized brake circuit. The experimental result is promising, and the proposed brake is suitable for various applications.