分析了激励线圈的尺寸、激励脉冲的频率、占空比和电压等因素对脉冲涡流检测系统的影响，给出了实际检测过程中选择参数的原则。
The influence factors such as the dimension of exciting coil, the frequency, the duty ratio and the voltage of exciting pulse were analysed, the principle of choosing testing parameters was proposed.
只需检测两相电源电流和直流侧电容电压，通过简单计算就可直接求出每个开关周期内各开关的占空比。
The duty ratios of switches in each switching cycle can be directly obtained by simple calculation using two phases source currents and dc bus capacitor voltage.
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