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AssigneeNorand Corporation
InventorDavid W. Conway
Estimating the term…
A current carrying wire is provided with a tubular shield construction which essentially covers the wire with conductive material, and preferably emulates a classical Faraday shield. The shield is formed of a multiplicity of insulated shield wires for minimized eddy current loss. When such a shielded wire construction is formed into a primary winding of a power transformer for a switching power supply, the secondary circuit is protected from electric shock hazards while enabling use of a gap free toroidal core for close coupling between primary and secondary windings. In another embodiment, such shields are used on both the primary and secondary windings of a matching transformer and are arranged for common mode rejection of noise associated with low power data signals.
A transformer construction comprising magnetic core means with a primary winding linking said magnetic core means, said primary winding having shield means formed of multiple shield wires substantially enclosing the primary winding, each shield wire having electrical insulation means covering the shield wire and electrically insulating such shield wire from the other shield wires of the shield, the shield wires having respective adjacent first ends electrically connected to ground potential and being otherwise in open circuit insulated relationship so as to provide a shield having the properties of a Faraday Shield for said primary winding.
A shielded wire construction comprising an elongated electrical conductor means for galvanically transmitting a fluctuating electric current therealong, and elongated electrically conductive shield means extending along said elongated electrical conductor means in shielding relation thereto and electrically insulated therefrom, said electrically conductive shield means being comprised of multiplicity of shield wires insulated from each other and in open circuit relation at one end of the shield means and connected in common to ground at the other end of the shield means,
A shielded wire construction according to claim 27, with said elongated electrical conductor means and said elongated electrically conductive shield means having a common central axis forming a plural turn winding configuration without substantial eddy current losses even at frequencies of the order of forty kilohertz.
In a shielded wire construction, elongated electrical conductor means for galvanically conducting alternating polarity power supply current, and an elongated electrically conductive shield essentially surrounding said elongated electrical conductor means and electrically insulated therefrom, said elongated electrically conductive shield being comprised of a plurality of shield wires arranged in an essentially enclosing shield configuration which essentially encloses the elongated electrical conductor means, each shield wire of the essentially enclosing shield configuration having electrical insulation means covering the shield wire and electrically insulating such shield wire from other shield wires of the essentially enclosing shield configuration, said elongated electrically conductive shield providing the properties of a Faraday shield for shielding said elongated electrical conductor means, the shield wires at one end of the elongated electrically conductive shield being electrically connected to ground potential and the shield wires at the opposite end of the elongated electrically conductive shield being disposed in open circuit insulated relationship.
A shielded wire construction comprising an elongated electrical conductor means for galvanically transmitting a fluctuating electric current therealong, and elongated electrically conductive shield means extending along said elongated electrical conductor means in shielding relation thereto and electrically insulated therefrom, said electrically conductive shield means being comprised of a multiplicity of shield wires insulated from each other and in open circuit relation at one end of the shield means and connected in common to ground at the other end of the shield means,
A shielded wire construction comprising an elongated electrical conductor means for galvanically transmitting a fluctuating electric current therealong, and elongated electrically conductive shield means extending along said elongated electrical conductor means in shielding relation thereto and electrically insulated therefrom, said electrically conductive shield means being comprised of a multiplicity of shield wires insulated from each other and in open circuit relation at one end of the shield means and connected in common to ground at the other end of the shield means,
A shielded wire construction comprising an elongated electrical conductor means for galvanically transmitting a fluctuating electric current therealong, and elongated electrically conductive shield means extending along said elongated electrical conductor means in shielding relation thereto and electrically insulated therefrom, said electrically conductive shield means being comprised of a multiplicity of shield wires insulated from each other and in open circuit relation at one end of the shield means and connected in common to ground at the other end of the shield means,
An electromagnetic structure comprising a primary winding galvanically conducting alternating polarity power supply current for energizing said primary winding, said primary winding comprising elongated electrical conductor means having its axis extending in successive spaced turns and galvanically conducting said alternating polarity power supply current as primary electrical current, a secondary winding comprised of secondary turns interposed between the spaced turns forming said primary winding, and an elongated electrically conductive shield separating the secondary winding from the elongated electrical conductor means to provide reduced capacitive coupling between the primary and secondary windings, said elongated electrically conductive shield essentially surrounding said elongated electrical conductor means and being electrically insulated therefrom, said elongated electrically conductive shield being comprised of a plurality of shield wires arranged in an essentially enclosing shield configuration which essentially encloses the elongated electrical conductor means, each shield wire of the essentially enclosing shield configuration having electrical insulation means covering the shield wire and electrically insulating such shield wire from other shield wires of the essentially enclosing shield configuration.
Dependencies are inferred from the claim text.