A Multilevel Inverter Scheme With Dodecagonal Voltage Space Vectors Based on Flying Capacitor Topology for Induction Motor Drives

作者：Mathew Jaison^*; Rajeevan P P; Mathew K; Azeez Najath Abdul; Gopakumar K

来源：IEEE Transactions on Power Electronics, 2013, 28(1): 516-525.

DOI：10.1109/TPEL.2012.2195784

• Dodecagonal space vectors
• flying capacitor
• multilevel inverters
• open-end winding
• space-vector pulsewidth modulation (PWM)

This paper presents a multilevel inverter topology suitable for the generation of dodecagonal space vectors instead of hexagonal space vectors as in the case of conventional schemes. This feature eliminates all the 6n +/- 1 (n = odd) harmonics from the phase voltages and currents in the entire modulation range with an increase in the linear modulation range. The topology is realized by flying capacitor-based three-level inverters feeding from two ends of an open-end winding induction motor with asymmetric dc links. The flying capacitor voltages are tightly controlled throughout the modulation range using redundant switching states for any load power factor. A simple and fast carrier-based space-vector pulsewidth modulation (PWM) scheme is also proposed for the topology which utilizes only the sampled amplitudes of the reference wave for the PWM timing computation.

• 出版日期2013-1