Motor control device with built-in shunt resistor and built-in power transistor

The invention relates to a motor control device with a built-in shunt resistor and a built-in power transistor. The motor control device comprises a high thermal conductivity substrate; the conductiveloop is arranged on the high-heat-conductivity substrate in a heat-conducting manner and comprises a first heat-conducting connecting pad part and a second heat-conducting connecting pad part which are arranged at an interval; the high-power transistor is conductively connected to the conductive loop; the shunt resistor is conductively connected to the high-power transistor; wherein the thermal expansion coefficient of the body is larger than that of the high-thermal-conductivity substrate. The welding parts extend from the body; wherein the body has a predetermined width, the width of the welding part is larger than the predetermined width, and the body and the high-thermal-conductivity substrate are arranged at intervals, so that when the welding part is welded to the first thermal-conductivity connection pad p