Shunt resistor
AssigneeSuncall Corporation
InventorsHiroya Kobayakawa, Kenji Murakami
Life of this patent
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Abstract
A manufacturing method of shunt resistor according to the present invention includes a step of calculating a difference between an initial resistance value and a desired resistance value as a resistance value to be adjusted, a step of providing a plurality of recess forming members capable of forming recesses each having a characteristic size in the surface of a resistive alloy plate, a recess determining step of determining the size and the number of the recesses necessary to be formed at the surface of the resistive alloy plate, and a recess forming step of forming the recesses according to the size and the number determined in the recess determining step by using the corresponding recess forming members.
Claims20
A shunt resistor, comprising:
- a pair of electrode plates spaced apart from each other in a plate surface direction;
- and
- a resistive alloy plate that connects the pair of electrode plates, the shunt resistor having a desired resistance value between the pair of electrode plates;
- wherein the resistive alloy plate is formed by an alloy member having a resistance value between the pair of electrode plates when the alloy member connects the pair of electrode plates that is smaller than the desired resistance value,
- wherein a surface of the resistive alloy plate is provided with multiple types of recesses, each type having different sizes, wherein a first type of the recesses has a size that is larger than a size of a second type of the recesses, wherein the recesses are configured to cause the resistance value between the pair of electrode plates to be the desired resistance value, wherein a number of the first type of recesses that are provided on the surface is a maximum number of the first type of recesses required to cause the desired resistance value, and
- wherein the multiple types of recesses are located along the same cross section in a direction perpendicular to a direction of electrical conduction.
A shunt resistor, comprising:
- a pair of electrode plates spaced apart from each other in a plate surface direction;
- and
- a resistive alloy plate that connects the pair of electrode plates, the shunt resistor having a desired resistance value between the pair of electrode plates, the resistive alloy plate formed by an alloy member having a resistance value between the pair of electrode plates when the alloy member connects the pair of electrode plates that is smaller than the desired resistance value;
- a first recess having a size disposed on an upper surface of the resistive alloy plate;
- a second recess having a size different from the size of the first recess disposed on an upper surface of the resistive alloy plate;
- and
- a third recess having a size different from the size of the first recess and the size of this second recess disposed on an upper surface of the resistive alloy plate,
- wherein the first recess, second recess, and third recess are configured to increase the resistance value between the pair of electrode plates to be the desired resistance value.
A shunt resistor, comprising:
- a pair of electrode plates spaced apart from each other in a plate surface direction;
- and
- a resistive alloy plate that connects the pair of electrode plates, the shunt resistor having a desired resistance value between the pair of electrode plates;
- wherein the resistive alloy plate is formed by an alloy member having a resistance value between the pair of electrode plates when the alloy member connects the pair of electrode plates that is smaller than the desired resistance value,
- wherein a surface of the resistive alloy plate is provided with multiple types of recesses, each type having different sizes, wherein the recesses are configured to cause the resistance value between the pair of electrode plates to be the desired resistance value,
- wherein the shape of each of the types of recesses is selected from the group consisting of:
- a quadrilateral pyramid and a cone, and
- wherein the multiple types of recesses are located along the same cross section in a direction perpendicular to a direction of electrical conduction.
Dependencies are inferred from the claim text.