Method and an arrangement for enabling the magnetizing current passing through a transformer to be minimized when an asymmetric load is applied to the secondary side of the transformer
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United States of America Patent
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-
Oct 25, 1988
Issued Date -
N/A
app pub date -
Dec 15, 1987
filing date -
May 23, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a method and to an arrangement for controlling the respective conduction times of two directionally opposed electrical devices (9,10) which are mutually connected in parallel and permit current to pass therethrough solely in one direction, and which also permit current (I.sub.2) to pass through the primary winding (2) of a transformer during a respective half-period of an A.C. voltage (U.sub.1) applied to the primary winding, this control being effected so that the magnetizing current through the transformer can be advantageously minimized and/or held beneath a given limit value when an asymmetric load (4,5) is applied to the secondary side (3) of the transformer. A magnetizing current in the primary winding corresponding to the load (5) of the secondary winding (3) is controled through the agency of different conduction times of the two directionally opposed devices (9,10).
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