Patent ID: 8288880
Filing Date: 2012-10-16
Classification: F16H,H02P

Abstract:
1. An electric power generator system operably connected to a main propulsion engine for a vehicle, the generator system comprising: a variable displacement first hydraulic pump drivably connected to the main propulsion engine, the first hydraulic pump including a mechanism for adjusting a flow rate of hydraulic fluid from the first hydraulic pump; a hydraulic motor fluidly connected to the first hydraulic pump such that the hydraulic fluid flow from the first hydraulic pump drives the hydraulic motor, the hydraulic fluid having a driving pressure between the first hydraulic pump and the hydraulic motor; an electric generator drivably attached to the hydraulic motor, the electric generator generating an alternating current having a frequency; a pressure sensor that generates a pressure signal indicating the driving pressure of the hydraulic fluid; a frequency sensor electrically connected to the electric generator that generates a power frequency signal; and a controller that receives the pressure signal and the power frequency signal, wherein the controller is configured to calculate a pressure set point based on the power frequency signal and adjusts the flow rate of hydraulic fluid from the variable hydraulic pump based on the difference between the calculated pressure set point and the pressure signal.