Patent ID: 7256515

Claim:
A power supply system for supplying power to a system load, the power supply system comprising: a plurality of power supply modules, wherein each power supply module comprises: a power-generating module for generating power to supply to the system load; a unidirectional device connected to the power-generating module at a first terminal and connected to the system load at a second terminal; and a fan for providing an air stream to dissipate the heat generated by the system load, the fan being connected to the second terminal of the unidirectional device; wherein (i) when the power-generating module is in normal operation, the power generated by the power-generating module is sent in one direction to the system load through the unidirectional device, and (ii) when the power-generating module fails, the fan is powered from the second terminal connected to the system load; wherein each second terminal of the power supply modules is coupled with one another to supply power to the system load.