Patent ID: 7538451

Claim:
A power supply system for supplying power to a load, comprising: a generator section for performing power generation; a current converter section that is connected to the generator section and that controls an output from the generator section to be a constant current, thereby to supply the power to the load; a charging and discharging control circuit that is coupled to an output from the current converter section and that charges a power storage section in a next stage; the power storage section that is connected to the charging and discharging control circuit and that performs charging and discharging; and a control section for controlling the output from the current converter section and an output from the charging and discharging control circuit, wherein when a current value necessary to operate the load is lower than or equal to a current value of the constant current, the power is supplied to the load from the generator section, and the power storage section is charged; and when the current value necessary to operate the load is higher than the current value of the constant current, the power is supplied to the load from both the generator section and the power storage section.