Patent ID: 7518975

Claim:
An operating current modifying device for a power generating element, wherein the power generating element initially generates an output power if an operating current is larger than a threshold current of the power generating element, and the threshold current is related to a temperature of the power generating element in a functional relationship, the operating current modifying device comprising: a threshold current modifying module configured to receive a temperature signal from the power generating element and to output a threshold current modifying signal according to the temperature signal and the functional relationship; a power modifying module configured to receive a power feedback signal from the power generating element and a target power signal and to output an operating current modifying signal; a current compensating module configured to receive the threshold current modifying signal and the operating current modifying signal and to distribute the operating current modifying signal to an operating current compensating signal and a threshold current compensating signal; and a power control module configured to receive the operating current compensating signal and the threshold current compensating signal and to adjust the operating current.