This digest presents a new algorithm for tuning a digital PID controller by directly shaping the output impedance in a DVMC boost converter, thereby achieving well-damped transient performance, particularly load transient performance over a wide load current range. Analytical design rules using stable pole/zero cancellation and the proposed direct output impedance shaping techniques are presented. A boost converter prototype is developed, and the digital PID controller is implemented using an FPGA device. A comparative study using different design methods are discussed, and superior transient performance using the proposed technique is demonstrated using simulation and experimental results.
