Patent ID: 8415818
Filing Date: 2013-04-09
Classification: F03D,F05B,H02P,Y02E

Abstract:
1. A method for compensating rotor torque harmonics in a double-fed asynchronous machine fed by a frequency converter controlled by a control unit, comprising the steps of: measuring at least one current machine parameter or deriving at least one current machine parameter from machine measurement parameters; decomposing the at least one current machine parameter into a positive system component and a negative system component; supplying the positive system component of the at least one machine parameter to an input of a first control member and supplying the negative system component of the at least one machine parameter to an input of a second control member; adding a first output value from the first control member and a second output value from the second control member to produce a control variable; and controlling the control variable so as to counteract torque oscillations.