Title :
Three-phase step-down reversible AC-DC power converter
Author :
Green, Tim C. ; Taha, Mohamed H. ; Rahim, Nasrudin Abd ; Williams, Barry W.
Author_Institution :
Dept. of Electr. & Electron. Eng., Imperial Coll. of Sci., Technol. & Med., London, UK
fDate :
3/1/1997 12:00:00 AM
Abstract :
Bidirectional DC current flow is not a natural feature of the buck (step-down) switch-mode rectifier, which leaves it at a disadvantage to boost (step-up) designs. A circuit topology is presented that allows bidirectional flow and which, by dual use of components, uses fewer devices than anti-parallel bridges. Sinusoidal current, controlled displacement factor, and variable voltage transfer ratio are demonstrated in a 1.5 kVA prototype. Dynamic performance is investigated through simulation and experiment. A PI plus velocity controller is shown to be adequate provided care is taken over changing between rectification and inversion
Keywords :
AC-DC power convertors; invertors; rectifying circuits; switched mode power supplies; two-term control; voltage control; 1.5 kVA; PI controller; bidirectional DC current flow; bidirectional flow; circuit topology; controlled displacement factor; dynamic performance; sinusoidal current; step-down reversible AC-DC power converter; switch-mode rectifier; three-phase AC-DC converter; variable voltage transfer ratio; velocity controller; voltage control; Bridge circuits; Buck converters; Circuit topology; Diodes; Displacement control; IEC standards; Prototypes; Rectifiers; Switches; Voltage control;
Journal_Title :
Power Electronics, IEEE Transactions on
