Multilevel Dodecagonal Voltage Space Vector Structure Generation for Open-End Winding IM Using a Single DC Source

作者：Boby Mathews; Pramanick Sumit; Kaarthik R Sudharshan; Rahul S Arun; Gopakumar K^*; Umanand L

来源：IEEE Transactions on Industrial Electronics, 2016, 63(5): 2757-2765.

DOI：10.1109/TIE.2015.2511162

• Dodecagonal space vector
• harmonic elimination
• induction motor (IM)
• multilevel
• open-end winding
• single dc-link

In this paper, a new inverter topology is proposed for generating a multilevel dodecagonal voltage space vector structure for open-end winding induction motor (IM) using a single dc source. Dodecagonal voltage space vector structure eliminates fifth-and seventh-order harmonic voltages from phase voltage output and hence eliminates the fifth-and seventh-order harmonic currents through the motor leading to removal of the dominant sixth-order torque ripple generation in the motor over the entire modulation range. Multilevel space vector structure generates output voltage with better THD and low dv/dt. In the proposed topology, two three-level inverters drive an open-end winding IM, one inverter from each side. DC-link of primary inverter is from a dc source which delivers the entire active power, whereas the secondary inverter dc-link is maintained by a capacitor, which is self balanced during the inverter operation. The PWM scheme implemented ensures low switching frequency for primary inverter. Secondary inverter operates at a small dc-link voltage. Hence, switching losses are small for both primary and secondary inverters. Experimental results show the elimination of fifth-and seventh-order harmonic voltages over the entire modulation range, validating effectiveness of the proposed multilevel inverter scheme.

• 出版日期2016-5