A soft-switched series-resonant DC/AC inverter without auxiliary switches
2002 IEEE 33rd Annual IEEE Power Electronics Specialists Conference. Proceedings (Cat. No.02CH37289) - Tập 2 - Trang 827-832 vol.2
Tóm tắt
A soft-switched series-resonant DC/AC inverter without auxiliary switches is presented. The inverter is configured by a full-bridge series-resonant inversion (FB-SRI) without cycloconversion and auxiliary switches. The inverter is a series resonator with four main switches to configure adaptively the output current suitable for impedance load. The output sinusoidal voltage is synthesized by a series of equal-amplitude quasi-sinusoidal pulses (QSPs) and the corresponding current is formed by unequal QSPs and adaptively phase-shifts to the impedance load. The nonlinear control strategy is designed against the input DC perturbation and achieves good dynamic regulation. The presented FB-SRI is operated by frequency modulation with a constant-on time control. Waveform syntheses for the output sinusoidal voltage and its current are clearly derived. A typical design example of a 500 W FB-SRI inverter is examined to assess the system performance. The power efficiency is over 90% when the inverter output is above 200W. The total harmonic distortions (THDs) for various impedance loads are all within 6%.
Từ khóa
#Pulse width modulation inverters #Switches #Impedance #Circuits #Resonance #Zero current switching #Zero voltage switching #Nonlinear dynamical systems #Total harmonic distortion #Uninterruptible power systemsTài liệu tham khảo
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