Large signal design of a buck converter for high power dc/ac conversion

Parameters defining the stable operation of the closed loop system in buck converter design considerations are discussed. Such parameters as poles and transmittance gains are examined, the study is aimed at determining suitable corrective networks giving the smallest modulus of the characteristic equation roots, and at determining parameter tolerances which allow acceptable performances compatible with stability criteria. It is found that the transfer function compensating network should be placed in parallel with the initial control loop, and to satisfy stability requirements, all the z poles in a closed loop should be zero.