Abstract
The invention provides a recycle energy DC power supply with grid-connected function. It provides three-lane-two-voltage power through the recycle energy power supply, and then applies a maximum power tracker to trace and control maximum power of the recycle energy power supply. Finally, power is transmitted to a load through a DC/DC transformer and the remaining power is fed into the grid-connected terminal by an active control circuit through a full-bridge rectifier. When power supplied by the recycle energy power supply is insufficient, the grid-connected terminal provides power to the load through a DC/DC rectifier. The active control circuit is switched off the full-bridge rectifier, and the full-bridge rectifier excuses active power filtering to an AC/DC rectifier. Furthermore, the invention applies an electrical energy equalizer to stably transmit the power outputted to the load. Therefore, the invention provides a recycle energy DC power supply with functions of electrical energy equalization and grid connection.