Abstract：A novel nonlinear digital control method based on proportional-integral-derivative controller (PID controller) for Flyback converter is investigated in this paper. If both input voltage and output voltage variation exceed the threshold value, the control scheme will calculate the duty of pulse width modulation (PWM) from the input voltage directly instead of PID compensator. Meanwhile, in order to improve dynamic response performance, the curve fitting technique is used to realize the complex division operation by multiplications to short the calculation time. Furthermore, input voltage prediction compensator is integrated too to compensate DSP calculation delay and improve the transient response performance. Experimental results verify that, compared with traditional PID control, the proposed control scheme can significantly improve system dynamic response and ensure output voltage remain stable under fast input voltage transient conditions.
孙亚萍, 朱善安, 任震宇, 王玉槐. 反激变换器带预估计补偿的非线性控制技术[J]. 电工技术学报, 2014, 29(6): 176-180.
Sun Yaping , Zhu Shanan , Ren Zhenyu , Wang Yuhuai. Research on Nonlinear Control Technique Based on Prediction Compensator for Flyback Converter. Transactions of China Electrotechnical Society, 2014, 29(6): 176-180.
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