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A High Gain AC-DC Rectifier Based on Current-Fed Cockcroft-Walton Voltage Multiplier for Motor Drive Applications

Zarepour, Ahmad; Rajaei, Amirhossein; Mohammadi-Moghadam, Hooman; Shahparasti, Mahdi (2021-11-08)

 
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https://doi.org/10.3390/su132112317

Zarepour, Ahmad
Rajaei, Amirhossein
Mohammadi-Moghadam, Hooman
Shahparasti, Mahdi
MDPI
08.11.2021
doi:10.3390/su132112317
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi-fe202201041184

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vertaisarvioitu
© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Tiivistelmä
This paper proposes a novel high-gain AC-DC converter based on the Cockcroft-Walton (CW) voltage multiplier which can be utilized in motor drive systems with low input voltage. In this topology, use of the voltage multiplier and boost circuit results in the increment of converter gain which has a significant impact on the cost and efficiency of the system. Moreover, in this converter, the AC voltage is directly changed to DC voltage using the switching method in high frequency and, as well, the power factor is corrected. Besides, this high-frequency converter contributes to the reduction of output ripple. On the other hand, cost efficiency, the low voltage stress on capacitors and diodes, compactness, and the high voltage ratio, are achieved from the Cockcroft-Walton circuit. Furthermore, the hysteresis method is presented for converter switching to correct the power factor. The converter is simulated in MATLAB software to demonstrate the effectiveness of the suggested method. Lastly, a laboratory prototype of the suggested converter is built, several tests are done in order to verify the theoretical analysis, and comprehensive comparison with the state-of-the-art converter is done.
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