ID 原文 译文
25135 在桥臂上的辅助谐振电路参与换流的过程中，逆变器的开关器件可实现零电流软关断。 When the auxiliary resonant circuit on the bridgearm works in commutation process of the inverter, the switching devices of the inverter can realize zero-current turn-off．
25136 当开关器件为绝缘栅双极型晶体管(Insulated Gate Bipolar Transistor，IGBT)时，IGBT 实现零电流软关断可使其拖尾电流导致的关断损耗等于零，有利于改善以 IGBT 作为开关器件的单相全桥逆变器的效率。 When the switching device is insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT), zero-current turn-off of IGBT can make the turn-off loss caused by trailing current be equal to zero, which is beneficial to improving the efficiency of single-phase full-bridge inverter with IGBT as switching devices．
25137 分析了电路工作流程。 The working process of the circuit is studied．
25138 实验结果显示出开关器件完成了零电流软切换动作。 The experimental results show that the switching devices realize zero-current soft-switching．
25139 因此，对于研发以 IGBT 作为开关器件的高效率单相全桥逆变器，该拓扑结构具有一定的参考价值。 Therefore, the topology has certain reference value for the research and development of high efficiency single-phase full-bridge inverter with IGBT as switching device．
25140 针对对称差分解析能量算子在高幅值振动干扰频率影响下性能较差的不足，在对称差分解析能量算子的基础上提出了一种改进的解析能量算子。 Considering that the inadequacy of the inferior performance of the symmetric difference analytic energy op-erator (SD-AEO) technique in the presence of vibration interferences with higher amplitudes, an improved analytic energy operator (AEO) based on SD-AEO is proposed in this work．
25141 该能量算子改用高阶对称差分序列替代对称差分序列以达到提高信号干扰比的目的，从而提高在高幅值振动干扰频率存在下提取故障特征的能力。 This proposed energy measure takes advantage of the higher-order symmetric difference to substitute the symmetric difference for the sake of boosting the signal-to-interference ratio(SIR), which can enhance the ability to detect the weak fault signal in the presence of vibration interferences with larger magnitude．
25142 此外，为了防止能量出现负值，该改进的能量算子采用了绝对值对其能量表达式进行加权处理。 Furthermore, the energy transformation of this proposed energy operator is weighted by absolute value to prevent the negative values in the transformed signal．
25143 通过模拟实验证明了该方法在抗噪和抗振动干扰方面的优越性，及其它的非负特性。 Under the simulated tests, the superiority of the immunity to intensive noise and interferences as well as the non-negative property is demonstrated．
25144 最后将其应用于真实轴承故障数据，发现该方法可以在恶劣工况下提取出故障特征频率。 Finally, the proposed energy detector is applied to the real-world data measured from the defective bearings, and it is found that this proposed fault detection tool can successfully identify the weak fault signatures under a severe working condition．