Vehicle and electric motor control method for vehicle

A vehicle comprising:

• an energy storage device;
• a drive device capable of two-way conversion between direct current and alternating current;
• a rotating electric motor connected to an alternating current side of the drive device, and having an output shaft connected to a load;
• a voltage transformer having a low voltage side connected to the energy storage device and a high voltage side connected to a direct current side of the drive device, the voltage transformer stepping up the voltage of the energy storage device, and applying the stepped-up voltage to the rotating electric motor through the drive device;
• and
• a controller that controls the drive device, the rotating electric motor, and the voltage transformer;
• the controller driving the rotating electric motor with a first current value, different from a minimum current value for the rotating electric motor to generate a specific drive force, so as to cause excess electric power to be consumed by the rotating electric motor, while also, when a temperature of the rotating electric motor or a temperature of the drive device exceeds a threshold temperature value, driving the rotating electric motor with a second current value smaller than the first current value and decreasing the electric power consumption of the rotating electric motor.