Electrical resistor and method for its manufacture
First Claim
1. Electrical resistor, in particular, for measuring current, with a resistive element (1) that consists of a metal resistive alloy, and with two connector contact elements that are arranged at a distance from one another on opposite ends (3) of the resistive element and consisting of a metal with a higher electrical conductivity than the resistive alloy, characterized by the fact that jacket sections (4) which surround the circumference of the resistive element (1) in tubular fashion and are formed of welded band or tube material are provided as the connector contact elements.
1 Assignment
0 Petitions
Accused Products
Abstract
SMD current-sense resistors are manufactured by dividing a drawn laminated wire structure that consists of a core of a resistive alloy and a jacket made of copper, e.g. After removing part of the copper jacket, jacket sections used as connector contact layers remain only at the ends of the resistor.
23 Citations
11 Claims
- 1. Electrical resistor, in particular, for measuring current, with a resistive element (1) that consists of a metal resistive alloy, and with two connector contact elements that are arranged at a distance from one another on opposite ends (3) of the resistive element and consisting of a metal with a higher electrical conductivity than the resistive alloy, characterized by the fact that jacket sections (4) which surround the circumference of the resistive element (1) in tubular fashion and are formed of welded band or tube material are provided as the connector contact elements.
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4. Method for manufacturing electrical resistors by utilizing a wire material of a metal resistive alloy, characterized
in that a wire core consisting of the resistive alloy is surrounded by a jacket of a metal that has a higher electrical conductivity than the resistive alloy; -
in that the jacket is welded such that a closed tube is formed;
in that the laminated wire structure formed of the wire core and its jacket is drawn to a smaller diameter, and in that the drawn laminated wire structure is separated into parts that form the individual resistors;
wherein an axially central section of the jacket is removed on each individual resistor such that jacket sections (4) that are separated from one another and serve as connector contact elements remain only at the ends (3) of the resistor. - View Dependent Claims (5, 6, 7, 9)
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8. Method for manufacturing electrical resistors by utilizing a wire material of a metallic resistive alloy, characterized
in that a wire core consisting of the resistive alloy is surrounded by a jacket of a metal that has higher electrical conductivity than the resistive alloy 6; -
in that the jacket is welded such that a closed tube is formed;
in that the laminated wire structure formed of the wire cord and its jacket is drawn to a smaller diameter; and
in that the drawn laminated wire structure is divided into disks that form the individual resistors;
wherein sections (14′
) of the jacket that are located opposite one another on the disk circumference are removed from each individual resistor together with the respectively adjacent section (10″
) of the resistive alloy such that jacket sections 914) that serve as connector contact elements remain only at the two ends of the remaining resistive element (10).
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Specification