Induction motor state observer insensible to `TR´ changes

A state observer with optimum dynamic performances is presented. A novel induction motor state observer insensitive to TR changes, which gives a satisfactory response to the accurate test for the real simulation of state observer functioning, is described. This does not include the rotor time constant in the computing algorithm. The authors present several simulations of the state observer. Simulations demonstrate the correct functioning under variable load conditions and TR values