Comparative study of two modelling implementation methods of a wound-rotor induction machine: Simulation, fault diagnosis and validation

The aim of this paper is to compare two modeling methods for a wound-rotor induction machine in order to simulate it in both healthy and faulty modes. The circuit-oriented approach which represents the machine model as a rotating transformer will be compared to the discrete event method. First, the wound-rotor induction machine model will be described using the classical equations in the abc reference frame. In fact, the circuit oriented method is based on a representation with only resistances, inductances and controlled voltage sources. It has been implemented by using the MATLAB/Simulink© software. With the discrete event method, the classical abc reference frame model is based on ordinary differential equations which are translated in block-scheme to be interpreted as a coupling of basic models based on a discrete event system specification. Finally, the performances of the two methods have been verified by comparison between simulation and experiments on a 5.5kW-220V/380V-50Hz-8 poles wound-rotor induction machine working in both healthy and faulty modes at different load conditions.