TY - GEN
T1 - Application of hybrid PWM and passive resonant snubber for grid-connected CSI
AU - Li, River T.H.
AU - Chung, Henry S.H.
PY - 2008
Y1 - 2008
N2 - A hybrid pulsewidth modulation (PWM) scheme that hybridizes the advantages of unipolar switching scheme (USS) and bipolar switching scheme (BSS) for grid-connected current source inverter (CSI) is presented. The former switching scheme has the advantage of low switching losses while the latter one has the advantage of generating output with low total harmonic distortion (THD). The inverter bridge is dominantly operated under USS over a line cycle, within which only one switch is switched at high frequency. It is momentarily operated under BSS around the zero-crossing points of the line voltage, within which two switches are switched at high frequency. To further reduce switching losses, two passive resonant snubbers are used for the high-frequency switches. The modes of operations, criteria of ensuring soft-switching and design procedures will be discussed. The proposed switching scheme and snubber structures have been successfully applied to a 900W, 220V, 50Hz prototype. The controller has been implemented with DSP TMS320F2808. The steady-state characteristics of the CSI operating from half load to full load conditions will be given. ©2008 IEEE.
AB - A hybrid pulsewidth modulation (PWM) scheme that hybridizes the advantages of unipolar switching scheme (USS) and bipolar switching scheme (BSS) for grid-connected current source inverter (CSI) is presented. The former switching scheme has the advantage of low switching losses while the latter one has the advantage of generating output with low total harmonic distortion (THD). The inverter bridge is dominantly operated under USS over a line cycle, within which only one switch is switched at high frequency. It is momentarily operated under BSS around the zero-crossing points of the line voltage, within which two switches are switched at high frequency. To further reduce switching losses, two passive resonant snubbers are used for the high-frequency switches. The modes of operations, criteria of ensuring soft-switching and design procedures will be discussed. The proposed switching scheme and snubber structures have been successfully applied to a 900W, 220V, 50Hz prototype. The controller has been implemented with DSP TMS320F2808. The steady-state characteristics of the CSI operating from half load to full load conditions will be given. ©2008 IEEE.
UR - https://www.scopus.com/pages/publications/52349107943
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-52349107943&origin=recordpage
U2 - 10.1109/PESC.2008.4592034
DO - 10.1109/PESC.2008.4592034
M3 - RGC 32 - Refereed conference paper (with host publication)
SN - 9781424416684
SP - 837
EP - 843
BT - PESC Record - IEEE Annual Power Electronics Specialists Conference
T2 - 39th IEEE Annual Power Electronics Specialists Conference (PESC '08)
Y2 - 15 June 2008 through 19 June 2008
ER -