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Energies 2018, 11(9), 2447; https://doi.org/10.3390/en11092447

Analysis to Input Current Zero Crossing Distortion of Bridgeless Rectifier Operating under Different Power Factors

1
School of Mechanical electronic & Information Engineering, China University of Mining & Technology, Beijing 100083, China
2
School of Mining Engineering Taiyuan University of Technology, Taiyuan 030024, China
*
Author to whom correspondence should be addressed.
Received: 23 August 2018 / Revised: 6 September 2018 / Accepted: 12 September 2018 / Published: 14 September 2018
(This article belongs to the Section Electrical Power and Energy System)
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Abstract

The principles and operating characteristics of bridgeless rectifiers under different power factors are discussed with emphasis on analyzing the input current distortion. Firstly, two driving modes are analyzed and compared. Based on the results of comparison it is concluded that the complementary drive mode is a better choice in terms of reducing the current distortion when bridgeless rectifier operates on non-unity power factor. Then, the mechanism causing input current zero-crossing distortion is analyzed. The input current during the distortion is expressed by the piecewise function when a bridgeless rectifier operates under complementary drive mode. Based on the piecewise function, the harmonic analysis is performed. Besides, the relationships between the input current Total Harmonic Distortion (THD) and the filtering inductance, the input current amplitude and the power factor angle are also investigated, which is useful when designing bridgeless rectifiers and selecting the corresponding parameters. Finally, the accuracy of the theoretical analysis is verified through the simulation and experiment. View Full-Text
Keywords: bridgeless rectifier; non-unity power factor; current distortion; piecewise function; parameter selection bridgeless rectifier; non-unity power factor; current distortion; piecewise function; parameter selection
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Liu, J.; Liu, Y.; Zhuang, Y.; Wang, C. Analysis to Input Current Zero Crossing Distortion of Bridgeless Rectifier Operating under Different Power Factors. Energies 2018, 11, 2447.

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