Mixed p-z approach for analytical analysis of power converters with periodic PWM

摘要

A mixed p-z approach for the time analysis of converter systems containing periodically operated switches is described. The approach is applicable for all types of converters with an explicitly determined output voltage (converters with forced commutation). The mathematical model uses the Laplace and modified Z transforms. The solution is not dependent on the number of the pulses of the PWM pattern. Instead of solution of algebraic equations the change of switching instants is reflected in the solution only by a change in two values m{sub}k and n{sub}k The derived equations are validated using a 3 kW three-phase PWM inverter.