The high-temperature electric-actuated valve widely adopts the split structure, and the valve stem drives the opening and closing of the valve after passing through the high-temperature packing and sealing structure. However, the transmission chain is too long, which cannot meet the pursuit of small volume and lightweight in the nuclear industry. In this paper, a novel integrated structure of high-temperature direct drive electric-actuated valve canned permanent magnet synchronous motor (DDEAV-CPMSM) is proposed. The structure omits the dynamic sealing structure composed of stuffing box, pressure plate and pressure sleeve, as well as the transmission structure of gears and couplings, and the reliability is significantly improved. This paper focuses on the calculation of the dimension parameters, thermal load design, and electromagnetic vibration of DDEAV-CPMSM, and compares it with the integrated structure of the induction motor to explore the optimal topology of the high-temperature electric-actuated valve. Aiming at the problem of serious heat generation in limited space, it is difficult to simulate the running time of high-temperature valve. Based on the magneto-thermal coupling method, a 3D temperature field model considering high-temperature heat source, canned sleeve eddy current loss, and hydraulic friction loss is established. The steady-state temperature distribution of the system at high temperature and the transient temperature change law of valve opening and closing are analyzed, and the minimum time of secondary start-up and the maximum running time under fault conditions are further studied, to provide a theoretical basis for the application of DDEAV-CPMSM. © 2022 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

中文翻译：

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高温直驱电动阀密封式永磁同步电动机的电磁-热分析

高温电动阀广泛采用对开式结构，阀杆通过高温填料密封结构带动阀门启闭。但传动链条过长，无法满足核工业对体积小、重量轻的追求。在本文中，提出了一种新型集成结构的高温直驱电动阀密封式永磁同步电机（DDEAV-CPMSM）。该结构省去了由填料函、压板和压套组成的动密封结构，以及齿轮和联轴器的传动结构，可靠性显着提高。本文着重于尺寸参数的计算、热负荷设计、DDEAV-CPMSM的电磁振动和电磁振动，并将其与感应电机的集成结构进行比较，探索高温电动阀的最佳拓扑结构。针对有限空间发热严重的问题，高温阀门的运行时间难以模拟。基于磁热耦合方法，建立了考虑高温热源、密封套涡流损耗和水力摩擦损耗的三维温度场模型。分析了系统在高温下的稳态温度分布和阀门启闭的瞬态温度变化规律，并进一步研究了故障条件下二次启动的最短时间和最长运行时间，为DDEAV-CPMSM的应用提供理论依据。© 2022 日本电气工程师协会。由 Wiley Periodicals LLC 出版。