A Method for Optimally Designing Snubber Circuits for Buck Converter Circuits to Damp LC Resonance
A Method for Optimally Designing Snubber Circuits for Buck Converter Circuits to Damp LC Resonance
复制标题
降压转换器电路缓冲LC谐振的优化设计方法
DOI：
10.1109/temc.2018.2841424
复制
发表时间：
2019
影响因子：
2.1
通讯作者：
Y. Toyota
中科院分区：
文献类型：
--
作者：
Y. Yano;N. Kawata;K. Iokibe;Y. Toyota
为了减小寄生<italic>LC</italic>谐振引起的电磁干扰，提出<italic>了RL</italic>和<italic>RC</italic>缓冲电路的优化设计方法。谐振的<italic>Q</italic>因子被用作设计标准。最佳的缓冲器参数确定分析和唯一的谐振回路的简化等效电路，并推导出作为缓冲器参数的函数的<italic>Q</italic>因子的解析公式。优化设计的缓冲器可以充分调整<italic>Q</italic>因子到任何设计目标。它们还可以最小化缓冲器的负面影响的增加，即，过冲和功率损耗。该方法被应用到<italic>RL</italic>和<italic>RC</italic>缓冲器被添加到一个同步降压转换器。仿真程序与集成电路强调（SPICE）仿真再现的缓冲器的效果，以验证该方法从谐振阻尼，过冲，和功率损耗的角度。结果表明，优化后的阻尼器阻尼效果达到了<italic>Q</italic>值设计指标。他们还表明，这些参数是最佳的抑制超调和功率损耗。这些结果表明，该方法适用于优化<italic>RL</italic>和<italic>RC</italic>缓冲器阻尼寄生<italic>LC</italic>谐振。
A method for optimally designing <italic>RL</italic> and <italic>RC</italic> snubber circuits is presented to reduce the electromagnetic interference caused by parasitic <italic>LC</italic> resonance. The <italic>Q</italic> factor of the resonance is used as the design criteria. Optimum snubber parameters are determined analytically and uniquely by using a simplified equivalent circuit of the resonant loop and deriving an analytical formula for the <italic>Q</italic> factor as a function of the snubber parameters. The optimally designed snubbers can adequately adjust the <italic>Q</italic> factor to any design target. They can also minimize the increases in the negative effects of the snubbers, i.e., overshoot and power loss. The method was applied to <italic>RL</italic> and <italic>RC</italic> snubbers to be added to a synchronous buck converter. The effects of the snubbers were reproduced by simulation program with integrated circuit emphasis (SPICE) simulation to validate the method from the perspective of resonance damping, overshoot, and power loss. The results showed that the damping effects obtained with the optimized snubbers met the <italic>Q</italic> factor design targets. They also demonstrate that the parameters are optimum in terms of suppressing overshoot and power loss. These results indicate that the method is suitable for optimizing <italic>RL</italic> and <italic>RC</italic> snubbers to damp parasitic <italic>LC</italic> resonance.