电快速瞬变脉冲群重复频率对有源医疗器械的影响分析

Analysis of Electrical Fast Transient Test Repetition Frequency on the Active Medical Devices

电气和电子设备(如开关及断路器)在切换的瞬间,会产生瞬变骚扰,这种脉冲很容易耦合到设备中影响其正常工作,因此有必要对具有较高重复频率的电快速瞬变脉冲群试验进行模拟,以考察敏感设备的抗扰性能,尤其是针对有源医疗器械产品的考察。文中对国内外标准进行了对比,并分析了电快速瞬变脉冲群的形成机理,重点研究了两种不同重复频率的差异。并通过对有源医疗器械分类试验,给出试验数据、受试设备整改措施。试验时应综合考虑多方面的因素选择重复频率,以满足电磁兼容试验的要求。

At the instant of switching electrical and electronic equipment(such as switch and circuit breaker),a transient disturbance will be produced.This pulse is easy to couple to the equipment and will affect the normal work.So it is necessary to examine the anti-interference performance of the sensitive equipment by electrical fast transient/burst immunity test with high repetition frequency.Particularly,it is necessary to examine the active medical devices.In this study,we compared the domestic and foreign standards.The formation theory of electrical fast transient/burst was analyzed,and the influence of two different repetition frequencies was analyzed.Through the classification test of active medical devices,the effect of two repetition frequencies on the tested equipment(EUT)was tested.The test data and rectification measures were given.In the test,we should consider multifactor and choose repetition frequency,to meet the electromagnetic compatibility test.