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高压电器  2015 

金属氧化物限压器用于晶闸管器件串联均压保护的研究

DOI: 10.13296/j.1001-1609.hva.2015.07.011, PP. 57-62

Keywords: 晶闸管器件,串联,均压,开通,关断,过冲电压,阻容吸收回路,金属氧化物限压器

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Abstract:

串联应用的大功率晶闸管器件目前均采用并联阻容吸收回路作为串联均压保护措施,但在某些应用领域,阻容吸收回路存在不适用性。文中提出了一种晶闸管器件串联均压保护的新方法,在每个串联晶闸管器件两端并联设置具有良好非线性特性的金属氧化物限压器,来限制晶闸管开通、关断过冲电压。经过理论分析、仿真研究和试验验证,初步论证了该方法的可行性。

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