Bridgeless High Efficiency Boost Rectifier For Energy Harvesting

The conventional ac-dc converters for energy harvesting system with diode rectifiers suffers considerable voltage drop results increase in power loss of circuitry and complexity. The bridgeless boost rectifier which is a unique integration of boost and buck-boost to condition the positive and negative half portions of the input ac voltage, respectively. Such a single stage ac-dc converter has been designed and simulated using MATLAB/SIMULINK at 50-kHz switching frequency. The boost and buck-boost topologies could share same inductor and capacitor to meet the miniature size and weight requirements. The input ac voltage with 10V amplitude is rectified and stepped up to 30V dc. Detailed design guidelines are provided with the purpose of minimizing the size, weight, and power losses