CAJ | 학술논문

反相绕组法是Boost变换器传导共模噪声抑制的一个有效技术，但绕组的寄生参数在高频段对噪声抑制能力有重要影响。通过对计及反相绕组寄生参数的Boost变换器共模等效模型的深入分析，明确寄生参数中的漏感、副边分布电容与补偿电容的串联谐振频率是影响噪声抑制能力的关键因素。优化寄生参数，提高谐振频率是扩大有效频率带宽，改善噪声抑制效果的有效措施。在此基础上，提出以反相1：1变压器代替反相绕组的新方法，该方法可以极大地减小漏感和副边分布电容，提高谐振频率。实验结果表明，反相变压器法较反相绕组法的有效频率带宽及高频段的共模噪声抑制能力得到明显提高。
반상요조법시Boost변환기전도공모조성억제적일개유효기술，단요조적기생삼수재고빈단대조성억제능력유중요영향。통과대계급반상요조기생삼수적Boost변환기공모등효모형적심입분석，명학기생삼수중적루감、부변분포전용여보상전용적천련해진빈솔시영향조성억제능력적관건인소。우화기생삼수，제고해진빈솔시확대유효빈솔대관，개선조성억제효과적유효조시。재차기출상，제출이반상1：1변압기대체반상요조적신방법，해방법가이겁대지감소루감화부변분포전용，제고해진빈솔。실험결과표명，반상변압기법교반상요조법적유효빈솔대관급고빈단적공모조성억제능력득도명현제고。
Anti-phase winding is an effective method to suppress the CM EMI conducted noise in Boost converter. However the parasitic parameter of the anti-phase winding has critical effect on high frequency ranges. By the detail analysis of the CM EMI equivalent model of Boost converter considering the parasitic parameter of the anti-phase winding, the key factor is confirmed which is due to the serial resonant between the leakage inductance and stray capacitance of secondary winding plus the compensated balance capacitance. Optimizing the parasitic parameters will bring the benefit to increase the resonant frequency and expend the effective bandwidth in CM noise suppression. Based on the theoretical analysis, a novel method is also proposed which use an anti-phase 1:1 transformer, instead of anti-phase winding. With the new method the leakage inductance and the stray capacitance can be controlled to decrease greatly, resulting in great increase of effective bandwidth. The result of experiment shows that a much higher effective bandwidth and then the much great CM noise suppression in higher frequency ranges can be obtained using the anti-phase transformer than that using the anti-phase winding.