Audio-frequency injection transformers for ripple control

H - Electricity – 01 – F

Patent

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336/46, 336/50

H01F 27/02 (2006.01) H01F 19/02 (2006.01) H01F 27/06 (2006.01) H01F 27/245 (2006.01) H01F 27/32 (2006.01)

Patent

CA 1094653

ABSTRACT A coupling transformer for networks with superimposed audio frequency voltage, especially for ripple control systems, with primary and secondary windings rigidly coupled with each other and arranged about a cylindrical iron core with radial lamina- tion within a housing having openings to enable a flow of air into and out of the housing; the primary and secondary windings surround one another coaxially and are separated and insulated from one another by a cast resin insulation, only one of the windings is em- bedded in the cast resin insulation while the other winding is freely accessible at both ends, coaxially surrounds the iron core and has at least one continuous cooling channel that is open at both ends to enable said flow of air to pass therethrough; and an electric shield is additionally provided between the two windings.

286631

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