Speed Measurement Delay and its Influence on IFOC Tuning

The Indirect Field-Oriented Control technique has been in use since the 1960s, with some innovations added to the basic original setting. Although variable-speed drive technology has evolved considerably, basic assumptions remain in place. This paper deals with the problem of sensing the mechanical speed using optical devices. This aspect has not been considered in previous works. To focus the contribution, finite-state model predictive control is used in this paper for stator current control. The outer (speed) loop considers PI control as is usually the case. The experimental results presented here show the need for new tuning methods. Keywords. Application of power electronics, Digital implementation, Mechanical and aerospace estimation, Quantized systems, Real-time control, Tuning.