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Five-Level Inverter Topology for IM Drive With DC-Link Capacitor Voltage Balancing and Common-Mode Voltage Elimination in Complete Modulation Range
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| Author(s) |
P.N. Tekwani, R.S. Kanchan, K. Gopakumar |
| Abstract |
This paper presents a five-level inverter topology for
induction motor (IM) drive with dc-link capacitor voltage
balancing and common-mode voltage elimination. A dual fivelevel
inverter fed open-end winding IM structure is used in the
present work. A hysteresis controller based closed loop control
scheme is proposed. It achieves the balancing of dc-link capacitor
voltages and elimination of common-mode voltage, together, in
the complete modulation range of the drive, including the over
modulation up to the 24-step mode operation. The controller is
capable of providing the capacitor voltage balancing and
common-mode voltage elimination in the motoring as well as
regenerative mode of operation. The proposed control scheme
does not affect the fundamental output voltage generated by the
inverter, as it effectively utilizes the availability of redundant
switching states for capacitor voltage balancing. The scheme is
presented with the simulation studies and experimentally verified
with a 1.5 kW open-end winding IM drive. |
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| Filename: | 029 |
| Filesize: | 579.3 KB |
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| Type |
Members Only |
| Date |
Last modified 2006-02-07 by System |
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