TY - JOUR
T1 - Evaluation of current stresses in nine-switch energy conversion systems
AU - Qin, Zian
AU - Loh, Poh Chiang
AU - Bahman, Amir Sajjad
AU - Blaabjerg, Frede
PY - 2014/11
Y1 - 2014/11
N2 - Converters with reduced-switch counts usually face some performance tradeoffs, which make them suitable for some applications but not others. The same applies to the nine-switch converter, which is a reduced-switch version of the back-to-back twelve-switch converter. The nine-switch converter has since been shown to experience a higher voltage stress, which can be lowered in some cases. A corresponding evaluation of its current stress is however lacking, and is hence addressed now by computing its switch currents when used for ac-ac, ac-dc, dc-ac and dc-dc energy conversions. Relevant expressions, application requirements and simulation results are presented for identifying cases, where the nine-switch converter can have an improvement in performance despite its reduced-switch count. These cases are verified in experiments using a 1.5 kW prototype built in the laboratory.
AB - Converters with reduced-switch counts usually face some performance tradeoffs, which make them suitable for some applications but not others. The same applies to the nine-switch converter, which is a reduced-switch version of the back-to-back twelve-switch converter. The nine-switch converter has since been shown to experience a higher voltage stress, which can be lowered in some cases. A corresponding evaluation of its current stress is however lacking, and is hence addressed now by computing its switch currents when used for ac-ac, ac-dc, dc-ac and dc-dc energy conversions. Relevant expressions, application requirements and simulation results are presented for identifying cases, where the nine-switch converter can have an improvement in performance despite its reduced-switch count. These cases are verified in experiments using a 1.5 kW prototype built in the laboratory.
U2 - 10.1049/iet-pel.2014.0005
DO - 10.1049/iet-pel.2014.0005
M3 - Journal article
SN - 1755-4535
VL - 7
SP - 2877
EP - 2886
JO - IET Power Electronics
JF - IET Power Electronics
IS - 11
ER -