New Linear Motor Concepts for Artificial Hearts
New Linear Motor Concepts for Artificial Hearts
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DOI：
10.1109/tmag.2007.916110
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发表时间：
2008-05
影响因子：
2.1
通讯作者：
T. Finocchiaro;T. Butschen;P. Kwant;U. Steinseifer;T. Schmitz-Rode;K. Hameyer;M. Lessmann
中科院分区：
文献类型：
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作者：
T. Finocchiaro;T. Butschen;P. Kwant;U. Steinseifer;T. Schmitz-Rode;K. Hameyer;M. Lessmann
当今市场上可买到的完全人工心脏(Tahs)存在易磨损部件的缺点。因此，他们的预期寿命是有限的，这些设备只能用于暂时的治疗，而不是目的地治疗。耐用和无磨损的手术是关键要求，因为失败是对患者生命的直接威胁。这些属性组合在直线电机中。本文通过一个样机展示了直线电机作为TAH驱动的潜力。在此原型的基础上，采用了不同的电机概念。每个概念的几何尺寸首先通过分析优化大致确定，在第二步，通过有限元(FE)计算进行更精细的调整。经过优化，两个概念达到了人体自然心脏提供的要求。第一个电机由运动线圈和静态永磁体组成，它们嵌入磁通集中几何结构中。为了避免线圈容易磨损的电源连接的缺点，另一种概念由静态线圈和移动永久磁铁组成，排列成Halbach阵列。在实验室构建和测试这两个概念后，动物实验将随后确定更好的概念。
Total artificial hearts (TAHs), available in today's market, have the disadvantage of wear-prone components. Thus, their expectation of life is limited and the devices can only be used for temporary and not destination therapy. Durability- and wear-free operations are the critical requirements, as failure is an immediate threat to the patient's life. These attributes are combined in linear motors. In this paper, the potential of a linear motor as TAH's drive is shown by a prototype. On the basis of this prototype, different motor concepts are employed. The dimensions of each concept's geometry are first roughly determined by analytical optimization, and in a second step, more finely tuned by means of finite-element (FE) calculations. After optimization, two concepts achieve the requirements, provided by the natural heart of the human body. The first motor consists of moving coils and static permanent magnets, which are embedded in a flux concentrating geometry. To avoid the disadvantage of wear-prone power connection of the coils, the other concept consists of static coils and moving permanent magnets, arranged in a Halbach array. After constructing and testing both concepts in laboratory, animal experiments will follow to identify the superior one.