Abstract
This paper proposes a regulation method of back-to-back connected two-level PWM rectifier-five-level Voltage Source Inverter (VSI) in order to reduce the torque ripple in induction motor. First part is dedicated to the presentation of the feedback control of two-level PWM rectifier. In the second part, five-level Neutral Point Clamped (NPC) voltage source inverter balancing DC bus algorithm is presented. A theoretical analysis with a complete simulation of the system is presented to prove the excellent performance of the proposed technique.
Highlights
The effects of torque ripple are undesirable in some demanding motion control and machine tool applications
This paper investigates the use of a back-to-back connection of two-level PWM rectifier-five-level Voltage Source Inverter (Fig. 1)
This connection allow balancing of the DC link capacitor voltages under a full range of operating conditions [2] whereas, only a limited operating range is possible if a passive rectifier is employed [3]
Summary
The effects of torque ripple are undesirable in some demanding motion control and machine tool applications. They lead to speed oscillations which cause deterioration in the performance. This paper investigates the use of a back-to-back connection of two-level PWM rectifier-five-level Voltage Source Inverter (Fig. 1). This connection allow balancing of the DC link capacitor voltages under a full range of operating conditions [2] whereas, only a limited operating range is possible if a passive rectifier (diode bridge) is employed [3]. At the end the simulation results demonstrate efficacy of this of back-to-back converters DC bus control
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