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分析了全桥逆变产生碰饱和的原因，提出实时监测变压器“伏－秒”数，根据“伏－秒”数与给定阈值的关系，自动调节“伏－秒”数，使主磁通工作在许可范围内，防止磁饱和．
In this paper, the reason of full-bridge full-bridge inverter is analyzed. The “volt-second” number of transformer is proposed in real time. According to the relationship between “volt-second” and given threshold, Work within the permitted range to prevent magnetic saturation.