A full-bridge three-level single phase inverter with stressless commutation cell and special PWM technique

This paper presents a full-bridge three-level single phase inverter which contains two switches operating in high frequency and two switches working in low frequency. In order to reduce the commutation losses each high frequency switch uses a stressless commutation cell, requiring a special pulse width modulation technique when a three level inverter is desired. To justify this special PWM technique, a comparative analysis among some PWM techniques is carried out. Furthermore the operating principles, relevant equations and test results are presented. The obtained results validate the proposed inverter.

[1]  L.C. de Freitas,et al.  A novel family of DC-DC PWM converters using the self-resonance principle , 1994, Proceedings of 1994 Power Electronics Specialist Conference - PESC'94.

[2]  K. Ngo,et al.  A PWM method for reduction of switching loss in a full-bridge inverter , 1994, Proceedings of 1994 IEEE Applied Power Electronics Conference and Exposition - ASPEC'94.

[3]  E.A.A. Coelho,et al.  A family of PWM soft-switching converters with low stresses of voltage and current , 1996, Proceedings of Applied Power Electronics Conference. APEC '96.

[4]  George C. Verghese,et al.  Principles of Power Electronics , 2023 .

[5]  T. W. Koerner.  STATIC POWER CONVERSION FOR SPACECRAFT , 1963 .

[6]  H. Akagi,et al.  A practical approach to harmonic compensation in power systems-series connection of passive and active filters , 1990, Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting.

[7]  Khai D. T. Ngo,et al.  A PWM method for reduction of switching loss in a full-bridge inverter , 1995 .

[8]  Deepak Divan,et al.  The Resonant DC Link Converter--A New Concept in Static Power Conversion , 1986, 1986 Annual Meeting Industry Applications Society.

[9]  J. M. D. Murphy,et al.  Power Electronic Control of Ac Motors , 1988 .