An initial investigation of insulation fault effects on LVAD motor performance

Proceedings Electrical Insulation Conference and Electrical Manufacturing Expo, 2005. Pub Date : 1900-01-01 DOI:10.1109/EEIC.2005.1566279

S. M. Patel, H. Penrose, P. Allaire, Z. Lin

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Abstract

Thousands of patients suffering from congestive heart failure (CHF) benefit from safe and reliable, temporary left ventricular assist devices (LVAD). Designed to perform in parallel with the left ventricle of the native heart, there are only five devices in the United States approved for use of up to 2 years to support CHF patients until a donor heart becomes available, or the heart recovers some function. With limited donor hearts (~3000), fully implantable LVADs are currently being designed for up to 10 years and are a complex medical device with multiple subsystems. The permanent magnet, brushless DC (BLDC) motor subsystem is evaluated for insulation failures using simulations of the electrical circuit model in MatLab (Mathworks). Variations in the number of turns lost and groundwall insulation have a direct effect on the current available to drive the motor. This preliminary model provides results that support the hypothesis that LVAD insulation failures lead to poor pump performance, and potentially, pump failure

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绝缘故障对LVAD电机性能影响的初步研究

成千上万的充血性心力衰竭(CHF)患者受益于安全可靠的临时左心室辅助装置(LVAD)。设计用于与原生心脏左心室并行工作，在美国只有五种设备被批准使用长达2年的时间来支持CHF患者，直到找到供体心脏或心脏恢复某些功能。由于供体心脏有限(约3000个)，完全植入式左心室辅助装置目前的设计时间长达10年，是一种具有多个子系统的复杂医疗设备。利用MatLab (Mathworks)中的电路模型仿真，对永磁无刷直流(BLDC)电机子系统的绝缘故障进行了评估。损耗匝数和接地墙绝缘的变化对驱动电机的电流有直接影响。该初步模型提供的结果支持了LVAD绝缘失效导致泵性能不佳并可能导致泵故障的假设

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings Electrical Insulation Conference and Electrical Manufacturing Expo, 2005.

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