Adaptive Composite Excitation And Constant Voltage Synchronous Generator

This thesis comes from the technological innovation project 2002 in Xi'an. The research is focused on the adaptive hybrid excitation synchronous generator system with constant output voltage. In order to keep the output voltage constant, the adaptive control is introduced in the digital voltage regulator of the generator system.The basic operating principles and the performance characteristics are described in the paper. The detailed demonstration of the generator, the hardware and software in control circuit is also given.It is difficult to control the air gap magnetic flux of a rare earth permanent magnet synchronous generator, for the magnetic flux is determined by the property of permanent magnet and is approximately kept constant. In the dissertation, a novel hybrid excitation constant voltage synchronous generator is adopted to improve the system performance, which takes the advantages of both electrical excitation and permanent magnet machines. A parted configuration is presented in order to design the structure of the generator. The adaptive digital adjustment is settled in principle using the Single Chip Microcomputer 80C31 as the control core of the voltage regulator and adopting the proportion-integral-differential control as the control arithmetic, then a sample is made. The testing result shows that the power with high-efficiency, high quality and stabilization is provided for the load through the sample generator.