Implementation of Slip-Controller for Induction Motor Drive Employing Indirect Matrix Converter

Recent advances in power electronics and microprocessor technology have made it possible to commercialize sophisticated sensor-less Vector-Control and Direct Torque Control (DTC) schemes of induction motor speed control for low and medium power drive requirement. However Variable Voltage Variable Frequency (VVVF) drives using constant V/F principle remain a predominant choice over Field Oriented Control (FOC) and DTC drives for induction motor speed control in applications where the need of fast and smooth response to speed/torque change is not required, such as pumps, washing machines, ventilation blowers, etc. Using constant V/F control in these applications reduce the cost of extra current sensors and computational resources compared to FOC or DTC drives, while achieving the expected speed-torque control.