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INTERNATIONAL JOURNAL OF CREATIVE RESEARCH THOUGHTS - IJCRT (IJCRT.ORG)
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ISSN Approved Journal No: 2320-2882 | Impact factor: 7.97 | ESTD Year: 2013
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Paper Title
A STUDY OF NEUTRAL POINT VOLTAGE AND COMMON MODE VOLTAGE CONTROL IN MULTILEVEL SPWM TECHNIQUE
Authors
GANDLA RADHA KRISHNA, B MOHAN NAIK
Keywords
Common Mode Voltage, Harmonics, Multilevel Inverter, Neutral Point Potential Control, Diode Clamped Multilevel Inverter.
Abstract
Conventional 2-level PWM inverters generate high dv/dt and high frequency common mode voltages which is very harmful in electric drives applications. It may damage motor bearings, conducted electromagnetic interferences, and malfunctioning of electronic equipments. Due to capacitor voltage unbalancing, neutral point potential also varies from zero. This paper presents a simple method to control the harmonics, common mode voltages and neutral point potential variation in neutral point clamped (NPC) inverters using different structures of sine-triangle comparison method such as Phase Disposition (PD), Phase Opposition Disposition (POD), and Common Mode Voltage off-set voltage addition method. Simulation results confirm the effectiveness of these simple methods to control common mode voltages. Neutral point potential variation is limited to less than 2% of dc capacitor voltage using a simple closed loop PI regulator.
IJCRT's Publication Details
Unique Identification Number - IJCRT2004513
Paper ID - 193993
Page Number(s) - 3586-3592
Pubished in - Volume 8 | Issue 4 | April 2020
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Publisher Name - IJCRT | www.ijcrt.org | ISSN : 2320-2882
E-ISSN Number - 2320-2882
Cite this article
GANDLA RADHA KRISHNA, B MOHAN NAIK, "A STUDY OF NEUTRAL POINT VOLTAGE AND COMMON MODE VOLTAGE CONTROL IN MULTILEVEL SPWM TECHNIQUE", International Journal of Creative Research Thoughts (IJCRT), ISSN:2320-2882, Volume.8, Issue 4, pp.3586-3592, April 2020, Available at :http://www.ijcrt.org/papers/IJCRT2004513.pdf
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ISSN: 2320-2882 Impact Factor: 7.97 and ISSN APPROVED Journal Starting Year (ESTD) : 2013
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ISSN: 2320-2882 Impact Factor: 7.97 and ISSN APPROVED Journal Starting Year (ESTD) : 2013
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