Semiconductor device, power conversion device, driving device, vehicle, and elevator

A semiconductor device, comprising:

• a semiconductor element having a first electrode, a second electrode, and a gate electrode;
• a surge voltage measuring unit electrically connected to the first electrode or the second electrode, the surge voltage measuring unit configured to measure a surge voltage;
• at least one measuring unit selected from a first measuring unit configured to measure electromagnetic noise caused by an operation of the semiconductor element, a second measuring unit configured to measure a voltage of a wiring electrically connected to the first electrode or the second electrode, and a third measuring unit configured to measure a current of the wiring electrically connected to the first electrode or the second electrode;
• a variable resistor electrically connected to the gate electrode;
• and
• a controller configured to control the variable resistor based on first measurement result of the surge voltage measuring unit and second measurement result of the at least one measuring unit and change a resistance value of the variable resistor.