Buck变换器在输出电压宽范围可调应用领域若干关键技术

Several Key Technologies on Buck Converter in Application Field of Wide Range Output Voltage Regulation

在研究了Buck变换器的纹波变化特征基础上,给出了连续状态下电路主要参数的代数表达式及控制系统的设计技术.通过系统仿真,指出了分岔特性给变换器输出纹波以及控制时间延迟给低输出电压的稳定控制所带来的不利影响.

Based on analyzing the ripple change characteristics of Buck converter, algebraic expressions of circuit main parameters and design technique of control system were proposed in continuous conducting mode. By using system simulation, the result shows that the bifurcation characteristics influence the output ripple of the converter, and the switch time delay makes the converter unstable when the output voltage is very small.