Motor control device with built-in current sensing resistor and power transistor

A control device with built-in shunt resistor and high power consumption component, comprising:

• a substrate;
• at least one electrically conductive circuit which is thermo-conductively installed on the high-thermally conductive substrate and includes at least one first thermal connection pad portion and a second thermal connection pad portion mutually spaced apart;
• at least one high power consumption component characterized in operation state variations due to current changes, which is installed on the electrically conductive circuit;
• and
• at least one shunt resistor conductively connected to the high power consumption component, in which the shunt resistor respectively includes a body whose thermal expansion coefficient is greater than that of the substrate, as well as a pair of welding portions extending outwards individually along the mutually opposite directions from the body, and wherein the body has a prescribed width, and the width of the welding portion is not smaller than the prescribed width, and the body and the high-thermally conductive substrate are spaced apart such that, upon welding the welding portion to the first thermal connection pad portion and the second thermal connection pad portion, the thermal expansion stress occurring between the body and the high-thermally conductive substrate can be distributed and undertaken in the width direction between the welding portion and the first thermal connection pad portion and the second thermal connection pad portion.