Generalized Predictive Controller for a Boost AC to DC Converter Fed DC Motor

This paper presents generalized predictive controller (GPC) applications to speed control of a separately excited DC motor using single phase, single way rectifier. Step up and step down characteristics of the output voltage can be obtained. The supply current is approximately sinusoidal with nearly unity power factor. The output voltage and current are smooth and a ripple free. A digital signal processor is used to implement and control the converter switch in open and closed loop operation. The proposed modeling and simulation are performed using differential equations which describing the system behavior in run up and steady state are presented. The speed control using predictive control is satisfy the best required response for load disturbances. The experimental results ensured the GPC controller robustness, simple and powerful control application capabilities. A digital signal processor based (DSP-ds1102) has been successfully used for on-line control of the separately excited DC motor drive. The high level C language has maximized the programming flexibility for on-line implementation of complex algorithms. This offers an efficient, robust and easy to implement high performance drive system. The operational characteristics of the converter for both open and closed loop speed control system are verified and proved to yield good agreement when compared with the experimental results.