Stability analysis of the Instantaneous Power Control (IPC) algorithm for induction machines

Instantaneous power control (IPC) has over recent years been proposed as an alternative method for the control of induction machines. This paper provides a stability analysis of the algorithm using linear techniques. Results are presented which confirm that the algorithm, in its raw form, does have a stability problem in regeneration. However the presence of a PLL based filter on the back-emf estimates, which is essential for practical implementation, stabilises the algorithm.