Shunt resistor mounting structure and mounting board
A shunt resistor mounting structure comprising: a resistor including a pair of terminal portions and adapted to perform current sensing; and a mounting board. The mounting board includes: a mounting portion including a pair of a first land and a second land to which the pair of terminal portions are respectively connected, and which allow a current to be measured to flow through the resistor; a substrate having the pair of lands formed thereon; a first voltage terminal formed on the substrate and including a line pattern led out from the first land; and a second voltage terminal including a wire connected to the terminal portion corresponding to the second land.
1. A shunt resistor mounting structure comprising:
a resistor adapted to perform current sensing, the resistor including a pair of separate first and second terminals and a resistive element electrically connecting the first and second terminals, wherein the resistive element is arranged to flow electrical current across itself in a current flowing direction, and the pair of first and second terminals are each arranged to flow the electrical current across itself in the current flowing direction;
a mounting board having a mounting surface;
a pair of first and second lands both arranged on the mounting surface with a gap for electrical separation between the first and second lands, wherein the resistor is placed so that, the pair of first and second terminals of the resistor are electrically connected to the first and second lands, respectively, and the pair of first and second lands are each arranged to flow the electrical current across itself in the current flowing direction;
a first voltage terminal formed on the mounting surface, wherein the first voltage terminal is electrically connected directly to the first land by a lead-out line running on the mounting surface; and
a second voltage terminal formed on the mounting surface, wherein the second voltage terminal is electrically connected directly to the second terminal of the resistor by a wire bridging above the lead-out line between the second voltage terminal and the second terminal of the resistor.
2. The shunt resistor mounting structure according to claim 1 , wherein the lead-out line is configured to run from a side of the first land.
3. The shunt resistor mounting structure according to claim 1 , wherein the pair of first and second terminals of the resistor are formed with an alloy plating film.
4. A shunt resistor mounting board for mounting a resistor adapted to perform current sensing the resistor having a pair of separate first and second terminals and a resistive element electrically connecting the first and second terminals, wherein the resistive element flows electrical current through itself in a current flowing direction, and the pair of first and second terminals are each arranged to flow the electrical current across itself in the current flowing direction, the mounting board comprising:
a mounting surface;
a pair of first and second lands both arranged on the mounting surface with a gap for electrical separation between the first and second planar lands, wherein the resistor is placed so that the pair of first and second terminals of the resistor are electrically connected to the first and second lands, respectively, and the pair of first and second lands are each arranged to flow the electrical current across itself in the current flowing direction;
a first voltage terminal formed on the mounting surface, wherein the first voltage terminal is electrically connected directly to the first land by a lead-out line running on the mounting surface; and
a second voltage terminal formed on the mounting surface, wherein the second voltage terminal is electrically connected directly to the second terminal of the resistor by a wire bridging above the lead-out line between the second voltage terminal anc the second terminal of the resistor.