A metal plate type high power variable resistor

Abstract

The invention discloses a metal plate type high-power variable resistor, comprising a top cover, a base and a connecting rod, the top cover, the connecting rod and the base are connected in an I form, the top cover is also provided with a spiral slide around the connecting rod as a center axis, the spiral slide penetrates the upper and lower end faces of the top cover, and a conductive sliding clamping device is disposed in the spiral slide; a spiral alloy resistive strip is fixed between the top cover and the base, and the upper end of the alloy resistive strip is extended into the spiral slide; the sliding clamping device is slidably connected with the alloy resistive strip, the top of the sliding clamping device is connected with a first outgoing end, one end of the alloy resistive strip is connected with a second outgoing end, resistance of two outgoing ends of the alloy resistive strip will change with sliding of the sliding clamping device, resistance of the resistor can be controlled precisely, and the resistor is small in size and good in universality, is adapted to environments requiring different resistances and is lower in usage cost.

Description

technical field [0001] The invention relates to the field of resistor elements, in particular to a metal plate type high-power variable resistor. Background technique [0002] Resistors in the prior art can be divided into: carbon film resistors, metal film resistors, and wire-wound resistors according to their materials; the power of these ordinary resistors is small and cannot reach the power required by a specific system, so a special resistor is required. Most of the metal plate resistors in the technology are covered with a layer of insulating material outside the metal resistance plate, and a lead wire protrudes from both ends of the metal plate. The temperature rise of the resistor will affect the performance of other components next to the resistor; most of the metal plate resistors in the prior art are rated resistors, and multiple sets of resistors are required to be disassembled and installed repeatedly in an environment that requires different resistance values, ...

AI Technical Summary

Problems solved by technology

[0002] Resistors in the prior art can be divided into: carbon film resistors, metal film resistors, and wire-wound resistors according to their materials; the power of these ordinary resistors is small and cannot reach the power required by a specific system, so a special resistor is required. Most of the metal plate resistors in the technology are covered with a layer of insulating material outside the metal resistance plate, and a lead wire protrudes from both ends of the metal plate. The temperature rise of the resistor will affect the performance of other components next to the resistor; most of the metal plate resistors in the prior art are rated resistors, and multiple sets of resistors are required to be disassembled and installed repeatedly in an environment that requires different resistance values, which is not only troublesome to operate , The cost is expensive and the resistance value of the installed resistor often has an error with the required resistance value. Therefore, how to reduce the volume of the metal plate resistor and make the resistance value of the resistor arbitrarily adjustable is a technical problem that needs to be solved in this field.

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