| Abstract |
Sampling and processing of ripple values cause enormous problems in digital controlled converter-drives and make high requirements to anologous interfaces. A good and cheap software alternative is the implementation of Binary Observers, which calculate state variables dependent on binary converter informations such as firing delay, current flow time and overlap time. In contrast to classical converter drives the use of Binary Observers allows the realization of sensorless electrical drives for the first time. This paper deals with the mathematical description of Binary Observers. The observer functions for currents and voltages will be discussed in more detail using a dc-drive as an example. This new strategy can also be transformed to electrical drives fed by commutation-less or self-commutated converters. Furthermore periodical processes are given in some ranges of medicine, biology and physics so that the use of Binary Observers is manysided. |
