Patent ID: 8585317

Claim:
A vibratory roller machine comprising: (A) a chassis; (B) at least one rotating drum assembly supporting the chassis on a surface, the rotating drum assembly including an exciter assembly that imparts vibrations to the drum; (C) an electric motor that drives at least one of the exciter and the drum; and (D) a series hybrid drive in operable communication with the motor, the series hybrid drive including: (i) a power storage system; (ii) an engine; (iii) a generator powered by the engine; and (iv) a controller operably coupled to the power storage system and the generator and controlling transmission of electrical power from the series hybrid drive to the motor; wherein the controller controls the series hybrid drive to transmit power to the motor from the generator whenever the prevailing power output from the generator can meet a prevailing power demand of the vibratory roller machine and to deliver power to the motor from the power storage system when the prevailing power demand exceeds the prevailing generator power output.