Kavithamani Ashok’s research while affiliated with Coimbatore Institute of Technology and other places

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Publications (1)


Figure 3. Block illustration of the V/f drive of three-phase induction motor [23].
Figure 6. The schematic of HPF [33].
Figure 7. Structure of the neural network.
Figure 8. Cont.
Figure 8. The performance of the drive using a passive filter for case 1. (a) Source voltage. (b) Source current. (c) Speed. (d) Torque. (e) Load current. (f) THD of a source current.

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Assessment of Harmonic Mitigation in V/f Drive of Induction Motor Using an ANN-Based Hybrid Power Filter for a Wheat Flour Mill
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June 2022

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5 Citations

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Bhuvaneswari Krishnasamy

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Kavithamani Ashok

Voltage/frequency (V/f) drive of a three-phase induction motor plays a crucial role in a flour mill for energy saving. Wheat consumption in India is increasing day by day, which reached 105,000 metric ton (MT) in 2021. India’s high wheat consumption and production increase flour mills. Thus, energy efficiency in a flour mill is a must in the present situation. Hence, V/f drives are widely used in flour mills. Apart from the advantages of V/f drive, electronic circuits in a drive induce harmonics in a power system. Power quality plays a vital role in a modern power system. Harmonics by V/f drive increase the current consumption, causing increased losses, cable overheating, and motor overheating, which necessitates a filter for harmonic mitigation. In this paper, an artificial neural network controller-based hybrid power filter is proposed for harmonic mitigation. A hybrid power filter (HPF) is presented to overcome the problems and achieve the active and passive power filter’s benefits. Harmonic mitigation of the proposed hybrid power filter is compared with the passive and active filter-based drives. This paper analyzes harmonic mitigation for three-phase induction motors with V/f drive installed in a 300-ton/day wheat flour mill’s purifier fan. The performance of the suggested system is analyzed under various speeds in the aspects of harmonic mitigation, reduction in current consumption, and energy saving using various filters. The entire system is developed and analyzed using MATLAB/Simulink. Energy saving is increased by around 10.97 kWh per year by HPF by means of reducing harmonics and current consumption compared to an active power filter, while it is increased by around 28.16 kWh/year compared to a passive power filter. Along with the harmonic mitigation, energy saving is also validated for various filters under various speeds.

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Citations (1)


... The efficacy of the filters might also diminish at higher frequencies due to sampling rate and filter order constraints, coupled with quantization errors and circuit-induced delays. Bhuvaneswari and Kavithamani [17] proposed an ANN controller-driven hybrid power filter, which significantly reduced source current THD, though concerns over data volume for training and computational expenses remained. ...

Reference:

Observer-based robust servomechanism control of a three-phase induction motor drive
Assessment of Harmonic Mitigation in V/f Drive of Induction Motor Using an ANN-Based Hybrid Power Filter for a Wheat Flour Mill

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