| Paper Details: | Downloads: 609 |
| Serial Number: | P1111120616
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| Title: | An Efficient Variable Delay Random PWM Algorithm based Direct Torque Controlled Induction Motor Drive for Noise Reduction
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| Authors: | P. Nagasekhar Reddy and P. Linga Reddy and J. Amarnath
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| Abstract: | Though the deterministic SVPWM algorithm gives good performance, it generates more acoustical noise. Hence, to mitigate the acoustical noise of the drive, this paper presents an efficient variable delay random pulse width modulation (VDRPWM) algorithm for direct torque controlled induction motor drive. The proposed VDRPWM technique is developed by using the notion of imaginary switching times, which are proportional to the instantaneous phase voltages. Hence, the proposed algorithm did not use angle and sector information and hence reduces the computational effort. Hence, the implementation of the proposed algorithm is simpler. Moreover, the proposed algorithm randomizes the switching periods by varying the delay of switching cycles with respect to corresponding sampling cycles. This randomization of switching periods has a mitigating effect of the acoustic and electromagnetic noise emitted by the supplied system. To validate the proposed PWM algorithm, simulation studies have been carried out and results are presented. The simulation results confirmed the features of proposed PWM algorithm.
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| Keywords: | acoustic noise, direct torque control, imaginary switching times, space vector pulsewidth modulation (SVPWM), variable delay random pulsewidth modulation (VDRPWM).
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| Journal/Conference: | International Journal of Automatic Control and System Engineering
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| Volume: | 11
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| Issue: | 1
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| Submission Date: | 5/19/2011 12:00:00 AM
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| Review Date: | 6/7/2011 12:00:00 AM
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| Publishing Date: | 6/19/2011 12:00:00 AM
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| Article Downloads: | 609
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