For this reason , it ' s application will be restricted . this paper designs a circuit topology structure of multi - functional converter , which contains rectifier , chopper and inverter , it can function in soft - starting , chopping and doubly - fed adjusting speed for doubly - fed motor 本文設(shè)計了一種適用于雙饋電機多種運行狀態(tài)的多功能變流器的拓?fù)浣Y(jié)構(gòu),它將整流器、斬波器與逆變器結(jié)合在一起,能完成電機的軟啟動、斬波、雙饋調(diào)速。