Research on Closed-Loop Control of Single-Phase Excited Permanent Magnet Synchronous Generator

Abstract

Aiming at the characteristic of excited single-phase brushless synchronous generator, it is analyzed that the single closed-loop excitation regulator has a defect that its output voltage is reducing with increasing load. Using double closed loop speed regulation system of DC motor for reference. Design a new type regulator which has a excitation current inner loop and voltage outer loop, and use PWM method to regulate excitation current. Based on mathematic model and design target of the diesel generator and voltage regulation of generator's steady and dynamic state, Current and voltage regulator are designed by typical link which is known by relation of target and parameter. The test result shows that the whole system has advantage that is regulating voltage precision and fast response. The voltage regulator is designed by engineering method, and it meets the requirements after correcting.