CAJ | 학술논문

电压调节器控制发电机的输出电压，在负载变化时，电压调节器通过检查输出电压，自动调节励磁电流，使发电机的输出电压稳定。传统的电压调节器通过调节功率晶体管控制极的电压或者调节晶闸管的导通角调节励磁电流，这些方法要么能耗大，要么电压调节瞬态响应差。这里设计了基于SG3525控制的Buck电路，通过调节功率开关管的PWM占空比调节励磁电流。为了平稳调节输出电压，硬件平台上设计了PI调节和软启动，并具有过压欠压保护和过励磁电流保护等功能。最后设计硬件平台验证设计的合理性。
전압조절기공제발전궤적수출전압，재부재변화시，전압조절기통과검사수출전압，자동조절려자전류，사발전궤적수출전압은정。전통적전압조절기통과조절공솔정체관공제겁적전압혹자조절정갑관적도통각조절려자전류，저사방법요요능모대，요요전압조절순태향응차。저리설계료기우SG3525공제적Buck전로，통과조절공솔개관관적PWM점공비조절려자전류。위료평은조절수출전압，경건평태상설계료PI조절화연계동，병구유과압흠압보호화과려자전류보호등공능。최후설계경건평태험증설계적합이성。
The generator′s output voltage is controlled by AVR (automatic voltage regulator). When the load changes,AVR regulates field current automatically to keep the generator′s voltage invariable by checking the output voltage. Traditional AVR regulates field current by controlling the giant transistor′s base electrode voltage or thyristor conduction angle. These ways consume much more energy or have a bad transient response. A Buck system controlled by SG3525 is designed in this paper,which regu-lates the field current by adjusting the PWM duty cycle of power switch. PI control and soft start are designed on the hardware plat-form to regulating the generator′s output voltage reposefully. In addition,low voltage protection,high voltage protection and high field current protection were designed in the system. The rationality of the regulator was verified by an experimental prototype.