Analysis of the ferroresonant transformer with a rectified outputin the low-line-voltage minimum-line-frequency full-load condition |
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Authors: | Kelley A.W. Wilson T.G. Owen H.A. Jr. |
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Affiliation: | Dept. of Electr. & Comput. Eng., North Carolina State Univ., Raleigh, NC; |
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Abstract: | Most previous analyses of the ferroresonant transformer address the unrectified-output AC-load case, and do not include some or all of the important loss mechanisms. The analysis reported in this paper addresses the rectified-output DC-load case and includes the stray losses. The low-line-voltage minimum-line-frequency full-load condition is the focus of this analysis because it is the worst-case condition for supplying power to the load. Assumptions about the operation of the transformer in this worst-case condition lead to a simplified equivalent circuit. Given equivalent-circuit element values, a special-purpose time-domain computer simulation analyzes transformer performance in the periodic steady-state condition. This analysis technique is used to find equivalent-circuit element values for which the transformer winding currents are a minimum and the input power factor and conversion efficiency are at a maximum |
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