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首页> 外文会议>DSC-vol.73-1; American Society of Mechanical Engineers(ASME) International Mechanical Engineering Congress and Exposition pt.A; 20041113-19; Anaheim,CA(US) >A STUDY OF MAGNETIC IMPACT TYPE MICRO-STEPPING ACTUATOR TO DRIVE LARGE PAYLOAD REFLECTOR FOR 4S REACTOR
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A STUDY OF MAGNETIC IMPACT TYPE MICRO-STEPPING ACTUATOR TO DRIVE LARGE PAYLOAD REFLECTOR FOR 4S REACTOR

机译：磁冲击式微步执行机构驱动4S反应器大型有效载荷反射器的研究

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A small and fast reactor employing sodium-cooling system is expected and 4S (Super Safe, Small and Simple) Fast Reactor generating 50 or 10 Megawatts electric has been designed. This reactor pursues simple operation system, less maintenance, higher safety and improved economic features. The electric power is controlled by a neutron reflector, which is required to be elevated at a very low speed. In the present study, a reflector drive system by a magnetic impact type micro-stepping actuator has been proposed for the 4S reactor. The actuator is composed of electromagnets, air-core coils and internal inertia guided by linear slider. This internal inertia carries air-core coils, which are opposed to air-core coils arranged inside the actuator. The actuator adheres to a metal base wall and supports a payload by electromagnet adsorption force. The actuator moves by a magnetic repulsion force of internal inertia by adding momentary large electric current to opposed pair of air-core coils. A miniature model of "internal inertia" magnetic impact type actuator was made. Two different ways to support the internal inertia were proposed to restore the internal inertia to the original state. In this paper, experiment was performed to evaluate the basic characteristics of the two types of actuator. As a result, the actuator elevated about 4 micrometers per step in the case of the "electromagnet support type" and about 25 micrometers per step in the case of the "spring support type" with 10-kilogram payload. Also, it was found that the payload carries out minute quantity separation instantaneously with the actuator by the shock of a repulsion force. This separation decreases the magnetic force by which the payload pulls down the actuator and makes the actuator upward movement easy. Moreover, it became clear that the driving distance could be sorted by "effective magnetic impact impulse", which can be calculated from current waveform. Therefore, driving distance can be controlled by condenser capacity and charged voltage that generates current waveform of the air-core coils. In light of these results, improvements will be made for design of an enlarged engineering model of the actuator. Experiments with larger payload are planned.
机译：预计将采用采用钠冷却系统的小型快速反应堆，并已设计出发电量为50或10兆瓦的4S（超级安全，小型和简单）快速反应堆。该反应堆采用简单的操作系统，较少的维护，更高的安全性和改进的经济性能。电力由中子反射器控制，该中子反射器需要以非常低的速度升高。在本研究中，已经提出了一种用于4S反应堆的，由磁冲击式微步进致动器构成的反射器驱动系统。执行器由电磁体，空心线圈和线性滑块引导的内部惯性组成。该内部惯性承载空心线圈，该空心线圈与布置在致动器内部的空心线圈相对。致动器粘附在金属底壁上，并通过电磁吸附力支撑有效负载。通过向相对的一对空心线圈添加瞬时大电流，致动器通过内部惯性的排斥力移动。制作了“内部惯性”磁冲击式致动器的微型模型。提出了两种支持内部惯性的方法来将内部惯性恢复到原始状态。在本文中，进行了实验以评估两种类型的执行器的基本特性。结果，在“电磁支撑类型”的情况下，致动器每步升高约4微米，在“弹簧支撑类型”的情况下，致动器每步升高约25微米，有效载荷为10公斤。另外，还发现有效载荷通过排斥力的冲击而与致动器瞬时地进行微小的量分离。这种分离减小了磁力，有效载荷通过该磁力将致动器下拉，并使致动器易于向上移动。而且，很明显，可以通过“有效磁冲击脉冲”对行驶距离进行分类，该“有效磁冲击脉冲”可以根据电流波形来计算。因此，可以通过电容器容量和产生空心线圈的电流波形的充电电压来控制驱动距离。根据这些结果，将对执行器的扩大工程模型的设计进行改进。计划进行更大负载的实验。

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