Abstract
A three-leg pulse-width modulation converter with auxiliary windings is provided and investigated to realize wide voltage operation and zero voltage switching characteristics on power switches. The presented converter has three converter legs on the input-side and two sets of winding turns on the output-side. Owing to the on/off states of the three converter legs and the two sets of secondary winding turns, the proposed converter can be operated under three different equivalent circuits to have wide input voltage operation from 30V ~ 240V (Vin,max = 8Vin,min). Compared with the multi-stage converters to realize wide input voltage operation, the proposed circuit topology has fewer circuit components and a simple control algorithm. Conventional duty cycle control with phase-shift between each converter leg is adopted to regulate load voltage and also accomplish zero voltage switching on active switches. The presented three-leg converter is tested with a laboratory circuit. Finally, experiments testify to the performance and validity of the presented converter.
Highlights
Renewable energy sources are widely developed and investigated to lessen fossil fuel demand and reduce air pollution
Power electronics have been developed for low power and medium power applications
Converters with wide voltage operation [1,2,3,4,5,6,7] for wind and solar power conversion are based on the circuit topologies of series-parallel connection or multi-stage conversion
Summary
Renewable energy sources are widely developed and investigated to lessen fossil fuel demand and reduce air pollution. Conventional DC converters with wide voltage operation [1,2,3,4,5,6,7] for wind and solar power conversion are based on the circuit topologies of series-parallel connection or multi-stage conversion. Energies 2020, 13, 1634 wide switching frequency range are the main drawbacks of the LLC converters. For remote control demand in stand-alone solar power systems, the wide voltage DC converter is needed to supply the necessary power for the control system, and the input voltage range of power units for controller demand is normally more than 4:1 This paper proposes a three-leg DC converter with auxiliary winding turns to accomplish low switching loss and wide voltage operation (30 V ~ 240 V).
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
