Inverter device having shunt resistor and printed board with conductive pattern component joining shunt resistor and terminal

An inverter device that uses an inverter to convert direct-current voltage supplied from a rectifying component to alternating-current voltage and applies the alternating-current voltage to an inductive load, the inverter device comprising:

• a shunt resistor provided on a direct-current link interconnecting the rectifying component and the inverter;
• a first terminal passing current to the shunt resistor;
• a second terminal to which the current from the shunt resistor flows;
• and
• a printed board with a conductive pattern formed thereon, the conductive pattern including
• a first conductive pattern component that joins the shunt resistor and the first terminal to each other, and
• a second conductive pattern component that joins the shunt resistor and the second terminal to each other,
• the first conductive pattern component, as seen from a position facing the shunt resistor from the first terminal, including
• a first central region connecting a right-side end and a left-side end of the shunt resistor to a right-side end and a left-side end of the first terminal,
• a first right-side protruding, region jutting out on a right side from the first central region, and
• a first left-side protruding region jutting out on a left side from the s central region,
• a ratio of an area of the first left-side protruding region to an area of the first right-side protruding region being a first range of 0.6 to 1.6,
• the first conductive pattern component further including a cutout defining an area that corrects a direction of the current flowing to the shunt resistor, and
• when an area of the first right-side protruding region and an area of the first left-side protruding region are different, and when a protruding distance of the first right-side protruding region using the right-side end of the shunt resistor as a reference and a protruding distance of the first left-side protruding region using the left-side end of the shunt resistor as a reference are different,
• the cutout being provided in whichever of the first right-side protruding region and the first left-side protruding region having a larger area and a larger protruding distance.

An inverter device that uses an inverter to convert direct-current voltage supplied from a rectifying component to alternating-current voltage and applies the alternating-current voltage to an inductive load, the inverter device comprising:

• a shunt resistor provided on a direct-current link interconnecting the rectifying component and the inverter;
• a first terminal passing current to the shunt resistor;
• a second terminal to which the current from the shunt resistor flows;
• and
• a printed board with a conductive pattern famed thereon, the conductive pattern including
• a first conductive pattern component that joins the shunt resistor and the first terminal to each other, and
• a second conductive pattern component that joins the shunt resistor and the second terminal to each other,
• the first conductive pattern component, as seen from a position facing the shunt resistor from the first terminal, including
• a first central region connecting a right-side end and a left-side end of the shunt resistor to a right-side end and a left-side end of the first terminal,
• a first right-side protruding region jutting out on a right side from the first central region, and
• a first left-side protruding region jutting out on a left side from the first central region,
• a ratio of an area of the first left-side protruding region to an area of the first right-side protruding region being a first range of 0.6 to 1.6,
• the second conductive pattern component, as seen from a position facing the second terminal from the shunt resistor, including
• a second central region connecting the right-side end and the left-side end of the shunt resistor to a right-side end and a left-side end of the second terminal,
• a second right-side protruding region jutting out on the right side from the second central region, and
• a second left-side protruding region jutting out on the left side from the second central region,
• a ratio of an area of the second left-side protruding region to an area of the second right-side protruding region being in a second range of 0.6 to 1.6,
• the second conductive pattern component including a cutout defining an area that corrects a direction of the current flowing from the shunt resistor, and
• when the area of the second right-side protruding region and the area of the second left-side protruding region are different, and when a protruding distance of the second right-side protruding region using the right-side end of the shunt resistor as a reference and a protruding distance of the second left-side protruding region using the left-side end of the shunt resistor as a reference are different,
• the cutout being provided in whichever of the second right-side protruding region and the second left-side protruding region having a larger area and a larger protruding distance.