Patent ID: 6433518
Filing Date: 2002-08-13
Classification: H02P

Abstract:
A method of controlling a generator with an exciter coil and an associated voltage converter, said voltage converter operating as a step-up converter, said method comprising the steps of:a) performing a first control process for controlling the generator when an output voltage (Uist) of the generator is below a normal operating voltage range (Usollâˆ’&Dgr;Umin to Usoll+&Dgr;Umax), said first control process comprising increasing an exciter current flowing through the exciter coil until said output voltage is in said normal operating voltage range or increasing said exciter current until said exciter current reaches a maximum exciter current value and then increasing said output voltage with the help of said step-up converter until said output voltage is in said normal operating voltage range, so that an output power of said generator is maximum; b) performing a second control process for controlling the generator when said output voltage (Uist) is within said normal operating voltage range (Usollâˆ’&Dgr;Umin to Usoll+&Dgr;Umax), said second control process comprising clocking said exciter current to regulate said output power of said generator; and c) performing a third control process for controlling the generator when said output voltage (Uist) exceeds said normal operating voltage range (Usollâˆ’&Dgr;Umin to Usoll+&Dgr;Umax), said third control process comprising limiting said output voltage by means of a P controller via said step-up converter in response to an overvoltage condition.