CAJ | 학술논문

平均电流控制的Boost PFC变换器可能工作于电感电流在半个工频周期内全连续、部分断续和全断续的模式，且不同工作模式下，变换器的传导 EMI 频谱存在差异。为了分析变换器的最恶劣传导EMI频谱并简化EMI滤波器的设计，首先给出变换器不同工作模式的输入电压和负载条件，并给出开关管漏源极电压的波形。通过分析开关管漏源极电压的各次谐波幅值特性指出，传导 EMI 开关频率基波的最恶劣情况出现在电感电流全连续的工作模式下，其它次谐波的最恶劣情况出现在负载较轻的条件下。
평균전류공제적Boost PFC변환기가능공작우전감전류재반개공빈주기내전련속、부분단속화전단속적모식，차불동공작모식하，변환기적전도 EMI 빈보존재차이。위료분석변환기적최악렬전도EMI빈보병간화EMI려파기적설계，수선급출변환기불동공작모식적수입전압화부재조건，병급출개관관루원겁전압적파형。통과분석개관관루원겁전압적각차해파폭치특성지출，전도 EMI 개관빈솔기파적최악렬정황출현재전감전류전련속적공작모식하，기타차해파적최악렬정황출현재부재교경적조건하。
The average current controlled boost PFC converter may operate in full-continuous, part-discontinuous and full-discontinuous current modes in a half line cycle, and the conducted EMI spectra of the converter appear differences in these operation modes. Analyzing the worst conducted EMI spectra of the converter, the input voltage and load conditions for the different operation modes were discussed, and the waveform of the voltage across the drain and source of the power switch was analyzed. By analyzing the characteristic of the harmonic amplitudes of the voltage across the drain and source, it is revealed that, the worst case of the fundamental switching frequency harmonic of the conducted EMI appears in the full-continuous current mode, and the worst cases for the other harmonics appear under the light load conditions.