STEADY-STATE MODEL OF THE AC DC CONVERTER IN THE HARMONIC DOMAIN/

A set of equations are developed that describe the 6-pulse convertor i n the steady-state harmonic domain. The method used is to directly con volve in the harmonic domain the DC voltage in each conduction period, with an appropriate sampling function. This avoids the need to use tr ansfer functions, FFTs, or complicated Fourier transforms. The techniq ue is fast and simple, and is able to model effects that have, until n ow, been largely ignored (such as the DC-ripple effect on commutation duration). Moreover, the equations are suitable for inclusion in a New ton-type solution method, as the partial derivatives are easily obtain ed.