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Inventi Impact - Power Electronics

Articles

  • Inventi:epe/65/14
    A TORQUE DISCONTINUITY FREE NEW HYBRID PWM APPROACH FOR HIGH SPEED INDUCTION MOTOR DRIVES
    Habibur Rehman, Roufin Mahmood, Taimoor Shah

    This paper designs a hybrid speed controller in which a Sine Triangle PulseWidth Modulated (SPWM) inverter is used below the base speed and a square wave inverter is employed above the base speed. The two inversion techniques complement each other for their advantages and disadvantages below and above the base speed. This paper proposes a unique strategy for the transition between SPWMand square wave by simply setting the frequency of the carrier signal equal to zero.Theproposed methodology in a way uses only one inversion technique and realizes a seamless transition fromthe SPWMto square wave compared to conventional method in which modes are simply switched from SPWM to square wave and vice versa when the speed changes above and below the base speed, respectively. Computer simulations show that the proposed technique has smoother torque transition and thus a better speed response compared to conventional approach of inverter mode switching around the base speed.The performance of proposed hybrid approach is also validated on a small prototype induction motor through experimental results.

    How to Cite this Article
    CC Compliant Citation: Habibur Rehman, Roufin Mahmood, and Taimoor Shah, “A Torque Discontinuity Free New Hybrid PWM Approach for High Speed Induction Motor Drives,” Advances in Power Electronics, vol. 2014, Article ID 281267, 10 pages, 2014. doi:10.1155/2014/281267. Copyright © 2014 Habibur Rehman et al. This article is distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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