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Capacitance Estimation of DC-Link Capacitors of Three-Phase AC/DC/AC PWM Converters using Input Current Injection  

이강주 (영남대 대학원 전기전자공학부)
이동춘 (영남대 전자정보공학부)
석줄기 (영남대 전자정보공학부)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.8, no.2, 2003 , pp. 173-179 More about this Journal
Abstract
In this paper, a novel on-line dc capacitance estimation method for the three-phase PWM converter is proposed. At no load, input current at a low frequency is injected, which causes dc voltage ripple. With the at voltage and current ripple components of the dc side, the capacitance can be calculated. Experimental result shows that the estimation error is less than 2%.
Keywords
Three-phase ac/dc/ac PWM converter; current injection; capacitance estimation;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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