Analytical approach for novel digital PID control switching power supply

The analytical approach for the proposed method is carried out in this paper. The dynamic characteristics are discussed by using Nyquist diagram. Compared with the conventional PID control, the stability region of proposed method expands. It is confirmed in the simulation. Moreover, the transient responses of conventional PID control and proposed method are discussed in the stability region. In the simulation, the improvement of stability is obtained compared with the conventional PID control because the gain margin is infinite. Also, improvement of transient response is obtained. As a result, the proposed method can expand the stability region and indicate a superior transient response to the conventional PID control.