National Natural Science Foundation of China (No.51207069);General Program of Postdoctoral Science Foundation of China (No.2013M531349);Research Project of Education Department of Liaoning Province (No.L2013146);Funded by Postgraduate Science Research Program of Jiangsu Province (No.1301105C)
WANG Qiang, LIU Yan-song, CHEN Xiang-xue, et al. Parallel Resonant DC Link Inverter with Low-Loss Auxiliary Circuit[J]. Acta Electronica Sinica, 2014, 42(7): 1369-1373.
DOI:
WANG Qiang, LIU Yan-song, CHEN Xiang-xue, et al. Parallel Resonant DC Link Inverter with Low-Loss Auxiliary Circuit[J]. Acta Electronica Sinica, 2014, 42(7): 1369-1373. DOI: 10.3969/j.issn.0372-2112.2014.07.019.
Parallel Resonant DC Link Inverter with Low-Loss Auxiliary Circuit
A parallel resonant DC link inverter with low-loss auxiliary resonant circuit was proposed to improve efficiency of the inverter.Auxiliary resonant circuit was added to DC link of conventional inverter to make DC-bus voltage decreased to zero periodically
which realized zero-voltage operation of all switching devices in inverter.Auxiliary switching devices could also be turned on under zero-current and turned off under zero-voltage.In addition
only one auxiliary switch was in auxiliary resonant circuit so that control strategy was simple;auxiliary switch and resonant devices were all in parallel with DC-bus to reduce loss of auxiliary resonant circuit.The operation principle was analyzed.The equivalent circuits at different operation modes and conditions for realization of soft-switching were presented.A 5kW laboratory prototype had been built.Experimental results were demonstrated to confirm validity of soft-switching inverter presented.