基于电流型PWM整流的恒流调光器研究

Research on the constant current regulator based on current source regulator

为了实现恒流调光器输出高品质的电能质量,文章分析了一种基于电流型PWM整流的助航灯光恒流调光器。首先分析了该恒流调光器工作原理和数学模型,其后通过大信号模型求解其电路方程的稳态解,设计了调光器的一种基于顺馈控制的解耦控制方法,可以有效的减少控制环路的稳态误差,实现恒流输出,并有效地降低网侧电流和输出电流的谐波含量,通过MATLAB/Simulink对系统进行了仿真验证,与传统的调光器相比其直流部分输出纹波小,网侧电流THD从2.71%降至1.88%,负载端输出电流的谐波含量从1.24%降至0.15%。结果表明,基于电流型PWM整流调光器的性能比传统调光器更优越。

In order to realize the high quality electric energy for constant current regulator, the lighting constant cur- rent regulator based on a king of current source PWM rectifier was analyzed in this paper. The working principle and mathematical model of the light constant current were analyzed firstly, and the steady-state solution of the circuit equa- tion was solved by large signal model, and the decoupling control method based on feed forward control was designed for regulator, as a result, the steady-state error of control loop can be decreased effectively, and constant current out- put can be realized, meanwhile, the harmonic content of output current and line side current can be also decreased ef- fectively. Simulated by MATLAB/Simulink, and compared with the traditional light regulator, the direct component of regulator had small ripple wave, THD in line side current was reduced from 2.71% to 1.88% , and the harmonic content of the output current from the load side was reduced from 1.24% to 0.15%. The performance of the improved type light regulator is better than that of the traditional light regulator.