Broken bar fault diagnosis in single and double cage induction motors fed by asymmetrical voltage supply

The diagnosis of faults in induction motors is a crucial scientific subject since it affects the industrial production functionality and reliability. Lately, a new scientific area is born: the electrical machines prognostics. So, aiming to this direction the complete knowledge of all abnormal parameters during the induction motor operation should be identified. In this paper, a methodology is described in order to identify not only if there is a broken bar fault, but also if the induction motor voltage supply is asymmetrical at the same time. The investigation is carried out with transient FEM simulations. The proposed methodology comes to supplement the traditional MCSA method with desired satisfaction.