描述
給出了兩種改進(jìn)三電平拓?fù)涞男时容^結(jié)果。圖10中的實(shí)線是p965f的效率曲線,即外管采用mosfet的二極管箝位三電平拓?fù)?;虛線是p969f的效率曲線,即采用mosfet +igbt并聯(lián)技術(shù)的二極管箝位三電平拓?fù)?。比較的條件為:輸出能力為10w,開關(guān)頻率是16khz。由圖10可見,在3kw以上時(shí),p969f的優(yōu)勢(shì)是顯而易見的,在滿載時(shí),p969f 比p965f效率高出約0.7%[3]。
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