Research on the Optimal Control Strategy for the Maximum Torque per Ampere of Brushless Doubly Fed Machines

This paper presents an optimization strategy for a brushless doubly fed motor (BDFM) to achieve the maximum torque per ampere (MTPA). method resolves issue of high stator currents in slip frequency vector feedback linearization control (SFV-FLC) during both no-load and light-load conditions. Firstly, establishes reduced-order state-space (SS) model BDFM arbitrary rotating reference coordinates. Secondly, expression is obtained after rotor field orientation. To ensure minimal current at specific torque, this constructs auxiliary function based on Lagrange’s theorem, which forces derivative be zero, resulting MTPA criterion. Finally, superiority algorithm proposed validated through simulation experiments.