An induction motor drive including a self-tuning loss-model based efficiency controller

A survey of real-time power-loss minimizers for induction motors

“…Some of these LMTs use motor parameters derived from offline motor testing, where the parameters are assumed to be fixed [21], [22], [23], [24], [25], [26], [27], and [28]. Others use look-up tables derived offline from a motor model [29], while still others try to estimate the parameters online and then use them to achieve minimum losses [30], [31], and [32]. Table 1 summarizes power loss (P loss ) models, each with its minimization variable (x), for most model-based LMTs presented here.…”

“…Parameter estimates are imperfect and might suffer from discrepancies. In [30], the rotor flux is used to minimize the losses, and its optimum value is derived from the motor model. Two motor parameters used in the model are estimated online: R r and L m .…”

Study on Optimal Condition of Adaptive Maximum Torque Per Amp Controlled Induction Motor Drives

“…However, efforts have been made to develop many control algorithms for tracking a desired torque, particularly in the case of optimal controls [1][2][3][4][5][6]8]. Little study has been conducted on the optimality of the MTPA control that the desired torque was achieved with minimum possible stator current [1][2][3][4][5][6]8].…”

“…Highly efficient operation of induction motor has been studied in the past years [1][2][3][4][5][6]. Among many efforts to obtain optimal performance, an Adaptive Maximum Torque Per Amp (Adaptive MTPA) control of induction motor drives was proposed [7].…”

“…Little study has been conducted on the optimality of the MTPA control that the desired torque was achieved with minimum possible stator current [1][2][3][4][5][6]8].…”