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Filter Configuration and PWM Method For Single-Phase Inverters With Reduced Conducted EMI Noise

Hedayati, Mohammad H and John, Vinod (2015) Filter Configuration and PWM Method For Single-Phase Inverters With Reduced Conducted EMI Noise. In: IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, 51 (4). pp. 3236-3243.

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Official URL: http://dx.doi.org/10.1109/TIA.2014.2387483


Electromagnetic interference (EMI) noise is one of the major issues during design of grid-tied power converters. A novel LCL filter topology for a single-phase pulsewidth modulation (PWM) rectifier that makes use of bipolar PWM method is proposed for a single-phase to three-phase motor drive power converter. The proposed topology eliminates high dv/dt from the dc-bus common-mode (CM) voltage by making it sinusoidal. Hence, the high-frequency CM current injection to the ground and the motor-side CM current are minimized. The proposed filter configuration makes the system insensitive to circuit non-idealities such as mismatch in inductors values, unequal turn-on and turn-off delays, and dead-time mismatch between the inverter legs. Different variants of the filter topology are compared to establish the effectiveness of the proposed circuit. Experimental results based on the EMI measurement on the grid side and the CM current measurement on the motor side are presented for a 5-kW motor drive. It is shown that the proposed filter topology reduces the EMI noise level by about 35 dB.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
Keywords: AC motor drive; ac-ac power conversion; bipolar pulsewidth modulation (PWM); common-mode current; commonmode voltage; conducted emissions; single-phase PWM rectifier; unipolar PWM
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 19 Aug 2015 06:01
Last Modified: 19 Aug 2015 06:01
URI: http://eprints.iisc.ac.in/id/eprint/52150

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