Modeling a transversalflux machine representing effects relevant for sensorless control

The transversalflux machine DYNAX is a high torque and power density machine. Unlike conventional rotary field machines the transversalflux machine consists of three single phase stators with coupling by a common rotor for constant torque generation. Therefore models of conventional machines cannot be used to describe the entire behavior of the DYNAX, even if the fundamental voltage and current waves behave similar to those of a conventional PMSM. Now the characteristics relevant for sensorless control in the whole speed range of this machine will be discussed. Subject of this paper is the modeling of magnetic and electric properties in stationary as well as in dynamic operation points. The effects of saturation and hysteresis are represented with various Preisach modeled areas in the stator. Eddy currents are treated as an additional short circuited winding. The current displacement is approximated with the division of the winding cross sections into three slices. The model is benchmarked with dynamic measurement data.