Boost DC-DC converters improve efficiency using soft switching technology for solar power systems.

Abstract

The invention relates to a high-gain, high-efficiency DC-DC boost converter for solar power systems. The device comprises a photovoltaic (PV) module located at the input power supply of the DC-DC converter (DC power supply 5) used to convert photovoltaic energy into electrical energy to supply DC power to the DC-DC converter, a DC-DC converter module to perform the boost function, and the DC-DC converter module includes: four boost power switches (1, 2, 3, 4), two boost windings (6, 7) and two capacitors (8, 9). Two capacitors (3.2 and 4.2) is installed in parallel with two power switches (3, 4) to achieve 0V voltage switching mode, the central processing unit (CPU) 10 includes processing software to generate PWM (Pulse Width Modulation) control signals for the power switches in the boost module to adjust the on / off time of the DC voltage conversion to a higher DC voltage, where, when the DC-DC converter is operating, CPU (10) controls the PWM pulse for the power switches (1, 2, 3, 4) in the boost module to increase the output voltage.

Images