One New Terminal Reaching Law Based Sliding Mode with Direct Thrust Control for the Linear Induction Machines in Metro Transportation

In this paper, one terminal reaching law based sliding mode (TRL-SMC) under direct thrust control (DTC) is proposed for the linear induction machine (LIM) to improve the dynamic response of the LIM in terms of the faster transient response, smother steady-state operation, smaller tracking error and lower thrust ripple than those of the conventional DTC (CDTC) and exponential reaching law based SMC (ERL-SMC) with DTC, persuasively. The TRL-SMC based DTC is fully compared with the CDTC and existing ERL-SMC based DTC under the different working scenarios through the extensive experimentation on a prototype of two 3 kW arc induction machines.