【摘要】 Buck型变换器是现代电力电子技术中一种重要的电能变换方法。近年来,随着微处理芯片技术飞速发展,CPU、DSP的运算速度大幅度提高,电源电流与时钟频率也随之提高,对于变换器的要求也急剧提高——特别是瞬态响应。分析、研究了针对buck变换器的对负载变化具有超快速响应的输出电压双环反馈V2控制方法的基本原理。针对其抗干扰能力差,当占空比大于50%时,会产生次谐波振荡的缺点对其进行了改进,并用Matlab对结果进行了仿真,仿真结果证明该方法是切实有效的。更多还原

【Abstract】 Buck converter is an important power converter of modern power electronics. Recently, with the rapid development of microprocessor technology, the operation speed of CPU and DSP has increased rapidly, and so do the power electric current and clock-frequency, all above require better performance of converter especially better transient response. In this paper a control technique ―V2 (Voltage-Voltage Control) control technique is analyzed and studied which has a very quick-response to variation in load. But it has a bad anti jamming ability, when the duty cycle is larger than 50% it will produce subharmonic oscillation. To enhance its anti-jamming ability, it has been improved and simulated by Matlab. The simulation results prove that the method is effective.更多还原