Title :
A Full Bridge Resonant Inverter with Modified Phase Shift Modulation
Author :
Ye, Z.M. ; Jain, P.K. ; Sen, P.C.
Author_Institution :
Dept. of Electr. & Comput. Eng., Queen´´s Univ., Kingston, Ont.
Abstract :
A full bridge resonant inverter is proposed as one of the potential building blocks for high frequency ac distributed power supply. Because the load impedance in ac distributed power system is unknown and the input line voltage has wide range of variation, voltage feedback and feed-forward control has to be applied to regulate the output voltage. However with the conventional phase shift modulation (PSM), the phase angle of the inverter output voltage shifts with the line and load perturbation. A modified symmetrical PSM is proposed where triangle waveform is used as carrier signal and the modulation signal is double edge modulated. With this method, the phase angle of the output voltage is independent of the line and load variation. The mechanism is described and analyzed. Performance during steady state and transient shows that the symmetrical PSM inverter is applicable to high frequency ac distributed power system
Keywords :
bridge circuits; distributed power generation; feedforward; phase shifters; resonant invertors; telecommunication power supplies; voltage control; ac distributed power system; carrier signal; feed-forward control; full bridge resonant inverter; high frequency ac distributed power supply; load impedance; modified phase shift modulation; modulation signal; output voltage regulation; potential building blocks; voltage feedback; Bridge circuits; Frequency; Impedance; Phase modulation; Power supplies; Power system control; Power system transients; Power systems; Resonant inverters; Voltage;
Conference_Titel :
Power Electronics Specialists Conference, 2005. PESC '05. IEEE 36th
Conference_Location :
Recife
Print_ISBN :
0-7803-9033-4
DOI :
10.1109/PESC.2005.1581694
