Current-sharing power supply system and power supply module

The invention provides a current-sharing power supply system and power modules, the current-sharing power supply system comprises a current-sharing bus and a plurality of power modules, each power module comprises a controller and a conversion circuit, the controller of each power module is connected to the current-sharing bus, and the conversion circuits of the power modules are connected in parallel and then connected with the current-sharing bus. And the direct current provided by the direct-current power supply is converted and output to a load. The controller of each power supply module sends a pulse width modulation signal to the current sharing bus, and the controller adjusts the output current of the conversion circuit corresponding to the controller based on the target low-level duty ratio, so that the sum of the output current of the plurality of power supply modules is equal to the target output current, and the output current of the conversion circuit is equal. According to the invention, the curr