Closed-Loop Scalar Speed Control of Induction Motor Drive with Limited Regenerative Braking Ability

In this paper, a real time speed control of induction motor with system simulation of common industrial machines is proposed. An industrial blower prototype with a three-level inverter is used. The system parameters are estimated by experiments with induction motor build in blower construction. This paper introduced an ability to limit the regeneration energy while braking by closed-loop control. The model approximation is used for system simulation powertrain, from the inverter to the blower load. The proposed closed-loop control is based on DSP and industrial encoder. The control compensates the slip and manages the motor speed for maintaining synchronization of the motor with the inverter.