Patent ID: 6531850
Filing Date: 2003-03-11
Classification: A01D,H02P

Abstract:
A control system for controlling the operation of an electric motor driving a working element on an implement, the control system comprising:an alternator having output terminals connected to the electric motor and a field excitation input for receiving a voltage signal, the alternator providing an output voltage level dependent on the voltage signal at the field excitation input; a voltage regulator connected to the field excitation input; a control connected to the voltage regulator for controlling the voltage signal at the field excitation input, the voltage signal being substantially lower than a maximum output voltage level at the alternator output terminals; and wherein the control provides both switching of the alternator to switch the electric motor on and off via the field excitation input so that arcing and high voltage transients are eliminated and, when the electric motor is switched on, the control regulates the field excitation voltage to maintain a preselected alternator output level.