COOLING STRUCTURE OF SHUNT RESISTOR AND INVERTER DEVICE USING THE SAME

摘要

PROBLEM TO BE SOLVED: To mount a surface mounting type shunt resistor on the solder surface side of a circuit board and use a heat radiator used in a conventional inverter device for cooling the shunt resistor.SOLUTION: A cooling structure of a shunt resistor includes: a shunt resistor 4 which is surface-mounted on a solder surface of a circuit board 7 with a semiconductor switching element 1 mounted on a component surface of the circuit board 7; a heat radiator 9 which radiates heat generated by the semiconductor switching element 1 and the shunt resistor 4; and an insulation material 8 which is disposed between the shunt resistor 4 and the heat radiator 9 and has high heat conductivity.