Abstract
A closed loop speed control of z source converter fed induction motor drive with peak dc link voltage control is proposed here. Induction motor control is based on closed loop scalar control strategy. It can overcome the limitations of voltage source inverter and can offer better speed control and drive operation during voltage sags and normal working conditions. The peak dc link voltage employed in order to achieve excellent transient performance which enhances rejection of disturbance, including thee input voltage ripple and load current variation, and have good ride through for voltage sags. A maximum boost control PWM is used in switching algorithm. The performance of proposed speed control method is verified through PSIM simulation of 1.8kW induction motor fed by Z source inverter. The simulation results of proposed scheme presents good dynamic and steady state performance over traditional voltage source inverter fed induction motor drive.
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