The use of finite element methods to improve techniques for the early detection of faults in 3-phase induction motors

This paper describes how commercial finite element packages may be used to simulate rotor faults and hence enhance the capability of practical condition monitoring schemes. Accurate models of the machine under faulted conditions are developed using both fixed mesh and time-stepping finite element packages. Some known causes of inaccuracy between models and experimental data are accounted for and the results of the simulation are compared with those obtained from a laboratory test rig. These models form the basis of a method to investigate fault types which present condition monitoring schemes cannot detect.