本帖最後由 charlescha 於 2010-4-22 18:12 編輯
回復 208# helenchan
Dear Helenchan
Thank you for your reply as you are a serious post writer
something may not collect as Power factor explanation
Active PFC
結構較複雜
較輕
發熱較低
冇低頻震動聲
typical power efficiency 較低(同 80+ 講緊既果隻轉換率唔同,係2樣野黎,另,較低只係一般而言,當然有例外)
廣範圍自動式電壓輸入(一般由 90V~264V,即係唔理你去日本、歐洲、美國定中國,照插照用)
成本較高
typical power efficiency shell be higher the PFC power factor correction
if possible please check from books
The word (typical) of the product may be
Passive PFC
結構較簡單
較重
發熱較高
有低頻震動聲
typical power efficency 較高
電壓輸入範圍窄(一般由 180V~264V)
成本較低 |