Patent ID: 8718881
Filing Date: 2014-05-06
Classification: B66C,H02P

Abstract:
1. A system for use with an operator supervised crane enabling a variable speed combustion engine to produce varying AC voltage to control at least one load comprising: a variable speed generator directly coupled to and driven directly by the engine having a speed corresponding to the speed of the engine and producing a variable AC voltage output; a first AC bus line connected on one end to the output of said generator; a diode converter producing a variable DC voltage having an input and an output wherein the input thereof is connected to the opposing end of said first AC bus line; a variable voltage DC bus line connected on one end to the output of said diode converter; at least one inverter each having at least one input and an output wherein an input of each one thereof is connected to said variable voltage DC bus line; at least one second AC bus line each of which is separately connected on one end to the output of a separate one of said at least one inverter; and at least one variable speed motor load each of which is connected to the opposite end of one of said separate second AC bus lines.