Abstract
Dual inverter fed open end winding induction motor (IM) drive offers many advantages over other multilevel inverter fed IM drives. Pulse width modulation (PWM) techniques are employed for the control of output voltage and frequency. Space vector base PWM techniques are popular among all the PWM techniques. A simplified space vector PWM method with simple and small look-up table approach is presented for dual inverter configuration. Moreover the proposed space vector based PWM technique provides freedom in selecting the center voltage vector (CVV) by which different PWM techniques will be derived. The implementation of all these PWM techniques is generalized by using a constant a <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">o</sub> . The derived PWM techniques show superior performance in reducing the zero sequence voltage (ZSV) by maintaining the same quality of output voltage. The performance of all these PWM techniques are evaluated theoretically and verified in real time through dSPACE 1104 control board.
Highlights
Intrudction1With the advancement in semiconductor technology, voltage source inverter (VSI) fed induction motor (IM) drives are gaining importance
Dual inverter fed open end winding induction motor (IM) drive offers many advantages over other multilevel inverter fed IM drives
As the Pulse width modulation (PWM) techniques are employed at high switching frequency, they improve the quality of output but because of switching action they synthesizes high frequency common mode voltage (CMV) or zero sequence voltage which have adverse effects on motor bearings and electromagnetic interference to nearby systems [8,9,10,11]
Summary
With the advancement in semiconductor technology, voltage source inverter (VSI) fed induction motor (IM) drives are gaining importance. Different coupled and decoupled PWM control strategies and circuit configurations [22,23,24,25,26,27] are proposed for isolated dual inverter fed open end winding induction motor drives. The implementation of these PWM techniques can be carried out based on space vector approach [22,23,24,25] and carrier comparison approach [26,27].
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