一种复合型单开关功率因数校正预调节器  

A HYBRID SINGLE-SWITCH POWER FACTOR CORRECTION PRE-REGULATOR

作　　者：李冬[1] 阮新波[1] 

机构地区：[1]南京航空航天大学,江苏南京210016

出　　处：《中国电机工程学报》2003年第8期81-84,共4页Proceedings of the CSEE

摘　　要：为了满足输入电流谐波限制标准,例如IEC 1000-3-2,在DC-DC变换器前加入一级功率因数校正变换器作为预调节器。但是对于有保持时间要求的电源,当输入掉电时,由于受下一级DC-DC变换器占空比变化范围的限制,预调节器电容上存储的能量不能全部传送到输出端,因此需要较大容量的电容以提供要求的保持时间。该文提出1种新的预调节器,它可以充分利用预调节器的电容能量,因此在相同的条件下可以减小储能电容,并且保持电容电压低于450V。分析了这种变换器的工作原理,并在1个250W的原理样机上进行了验证,最后给出了实验结果。Power factor correction converters are widely used as a pre-regulator to comply with IEC 1000-3-2 specifica-tions. However, for power supplies with hold-up time require-ment, when the input drops out the energy stored in the capacitor of the pre-regulator can not be fully transferred to the next stage due to the limit of duty cycle in the downstream dc-dc converter. A new pre-regulator integrated with a boost converter is proposed. The bulky capacitor can be reduced and the energy stored can be fully delivered to the next stage by the inserted boost converter. In the same time a feedback winding is used to suppress the voltage across the capacitor below 450V. The downstream dc-dc converter (Asymmetrical Half-Bridge) can be designed optimally due to the constant output voltage. Basic operation of the converter is discussed and experimental results are presented to illustrate the circuits overall performances.

关 键 词：预调节器 复合型单开关功率因数校正 DC-DC变换器 电流谐波限制标准 

分 类 号：TP214[自动化与计算机技术—检测技术与自动化装置] TN624[自动化与计算机技术—控制科学与工程]