Multi frequency wideband active damping device for compensation of torsional vibration

Abstract

In this paper a device for wideband, multi frequency active vibration cancellation for rotating drive trains is presented. It can be installed subsequently into problematic drive trains (e.g. wind turbines, combined heat and power stations …) and can be individually fit to the constructive limits given by the existing system. A formula to calculate the mechanical properties of the actuator is derived. Furthermore we present a new electrical design with improved performance and better control possibilities. Based on the new design we show a method for an easy but nevertheless robust control mechanism of the actuator using an asymmetric three phase current system. Finally we present a functional demonstration of the new control algorithm in simulation and give a brief outlook on upcoming research activities.