Identification of rotor and stator flux linkage maps of squirrel cage induction motors based on identification of rotor time constant maps

Model-predictive, field-oriented control of squirrel cage induction motors (SCIM) depends on the accurate identification and orientation of rotor and stator flux maps. In this paper, a new method is presented that utilizes the measured rotor time constant maps to reduce the orientation error of the identified flux maps. This enables the identification and modelling of the nonlinear and transient machine behavior, due to the estimation of the stator- and rotor-flux maps in dependence of stator and rotor currents

Design guideline for PCB integrated, high bandwidth, current slope sensing based on a planar Rogowski coil

This paper shows the design process of a planar Rogowski coil integrated in the Printed-Circuit-Board (PCB) for direct current slope measurement. Focus lies on the analytic estimation of the coil parameters with respect to specific limitations and the analog signal processing for a simplified design process. All analytic derivations are verified by measurements