Online Maximum Torque Per Total Ampere Control for Nest-loop Secondary Linear Doubly-Fed Machine Considering Static End Effect

The nest-loop secondary linear doubly-fed machine (NLS-LDFM) is a novel linear machine developed from rotary brushless doubly-fed induction machine, which has a potential application in urban rail transit. In this paper, a maximum torque per total ampere (MTPTA) control strategy for NLS-LDFM considering static end effect is proposed. By realizing the MTPTA, the primary copper loss can be reduced. Furthermore, the compensation strategy for static end effect is applied in the control period to reduce the harmonic of current. Finally, the proposed method is verified by the simulation results.