CAJ | 학술논문

Pseudo-Boost变换器具有双极性增益，在正负电压输入时，均可得到正极性的输出电压，因此Pseudo-Boost变换器可以作为无桥PFC 变换器。然而，在Pseudo-Boost 变换器开关管关断时刻， Pseudo-Boost变换器的升压电感与谐振电感形成串联支路，引起电感电流跃变，导致严重的电压尖峰，限制了Pseudo-Boost变换器的实际应用。针对这一问题，本文提出了一种改进型Pseudo-Boost变换器，通过在谐振电感两端并联一个开关管，避免了Pseudo-Boost变换器工作过程中电感串联支路的出现，消除了电压尖峰。详细分析了工作于临界导电模式的改进型Pseudo-Boost变换器的工作模态及稳态特性。最后，通过实验验证了理论分析的正确性。此外，该方案同样适用于连续模式和断续模式。
Pseudo-Boost변환기구유쌍겁성증익，재정부전압수입시，균가득도정겁성적수출전압，인차Pseudo-Boost변환기가이작위무교PFC 변환기。연이，재Pseudo-Boost 변환기개관관관단시각， Pseudo-Boost변환기적승압전감여해진전감형성천련지로，인기전감전류약변，도치엄중적전압첨봉，한제료Pseudo-Boost변환기적실제응용。침대저일문제，본문제출료일충개진형Pseudo-Boost변환기，통과재해진전감량단병련일개개관관，피면료Pseudo-Boost변환기공작과정중전감천련지로적출현，소제료전압첨봉。상세분석료공작우림계도전모식적개진형Pseudo-Boost변환기적공작모태급은태특성。최후，통과실험험증료이론분석적정학성。차외，해방안동양괄용우련속모식화단속모식。
Under both positive and negative input voltage, the output voltage of Pseudo-Boost converter is positive, i. e. Pseudo-Boost converter has bipolar voltage gain, which makes it acting as a bridgeless PFC converter. For the Pseudo-Boost converter, when the switch is turned off, boost inductor is connected in series with resonant inductor, which makes a step change of inductor current, and thus produces a serious voltage spike. This voltage spike may limit the application of Pseudo-Boost converter. In this paper, to eliminate the voltage spike at the time when the switch is turned off, an improved Pseudo-Boost converter is proposed by connecting a switch in parallel with the res-onant inductor. Experimental results are provided to verify the theoretical analysis results. Furthermore, the scheme can be applied to both continuous conduction mode and discontinuous conduction mode.