摘要：分析了開關器件、電感在硬開關Boost PFC電路中的損耗,并計算了Boost PFC變換器電路的開關損耗，給出功率損耗計算方法。通過對用有源功率因數(shù)校正集成電路UC3854應用實現(xiàn)的用于Sever Computer的 600W開關電源的分析計算，用實驗驗證了Boost PFC電路功率損耗計算方法的正確性。 敘詞：Boost變換器 功率因數(shù)校正 功率損耗 硬開關 Abstract：The power dissipations of switching components and inductor used in Boost PFC converter are analyzed, researched and computed, and then their distributions are figured out. Furthermore the paper rectified one 600W Switch Power Supply for server computer with UC3854 PFC controllerto prove the correction of the computer method Keyword：Boost converter; PFC; power loss; hardware switching