| Abstract |
In many DC drive systems, there is an elastic coupling between the motor and the load. However, this elastic coupling deteriorates the dynamic properties of the system, because the multiplication factor of the speed regulator has to be lowered for stability reasons. The dynamic respons of the load can be upgraded through a feedback of the speed difference between motor and load with a certain multiplication factor, as a correction on the current command. In this method, the feedback of the speed of the load instead of the motor is possible, giving better dynamic properties. However, because of the additional feedback the simple optimalisation method of the Symmetrical Optimum cannot be applied. In this paper an optimalisation procedure based on the Method of Double Ratios (P. Naslin 1968) is proposed. Both the parameters of the speed regulator and the multiplication factor of the speed difference are determined. |
