摘  要：盡管常用變頻器已經技術成熟，但仍有待改進之處。本文介紹幾項改進技術：基于IGBT整流/回饋的四象限H橋級聯頻器；調速用MMC變頻器；無刷雙饋調速；切換型雙饋調速；基于IGBT和MOSFET混合開關的低壓逆變器。 關鍵詞：變頻；改進技術；四象限H橋；MMC；雙饋調速；混合開關 Abstract: Although conventional inverter technology has matured, but there is still room for improvement. This article describes several improvements in technology: IGBT rectifier / regenerative four-quadrant H-bridge cascaded in[登陸后可查看全文]