Electric power conversion systems – Current conversion – Using semiconductor-type converter
Patent
1987-12-15
1988-10-25
Salce, Patrick R.
Electric power conversion systems
Current conversion
Using semiconductor-type converter
363 28, 363139, 323903, 55105, H02M 7155
Patent
active
047808047
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).
REFERENCES:
patent: 2841239 (1958-07-01), Hall
patent: 4348734 (1982-09-01), Dougherty
patent: 4368419 (1983-01-01), Welty
patent: 4587475 (1986-05-01), Finney, Jr. et al.
Flakt AB
Jones Judson H.
Salce Patrick R.
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