Patent ID: 7843079

Claim:
A power generating device capable of outputting at a constant rotation speed, comprising: a power source, an electric generator and a constant speed unit; wherein the constant speed unit further comprises: a hydraulic torque converter; a continuously variable transmission (CVT) mechanism; a first differential gear set comprising two input ends and an output end, wherein the first differential gear set is connected to the power source through a first transmission shaft comprising a first gear set connected to an input end of the continuously variable transmission (CVT) mechanism, and the first differential gear set is connected to the electric generator through a second transmission shaft comprising a second gear set connected to an input end of the hydraulic torque converter; and a second differential gear set comprising two input ends and an output end, wherein the two input ends of the second differential gear set are respectively connected to an output end of the continuously variable transmission (CVT) mechanism and an output end of the hydraulic torque converter, and the output end of the second differential gear set is connected to the other input end of the first differential gear set, so that the partial power is controlled by the second differential gear set and transmitted to the electric generator through the output end of the first differential gear set.