IMPROVED ELECTRIC VEHICLE TRACTION INVERTER EFFICIENCY

A vehicle propulsion system including a system controller for determining a rotational speed and a rotational torque in response to a user input and a vehicle operating mode, a battery for supplying a DC current, an electric motor configured to generate the rotational torque at the rotational speed in response to an AC voltage, an inverter for transforming the DC current into the AC current using a first transistor and a second transistor, and an inverter controller for determining a dead time in response to the rotational torque and the rotational speed and for removing a first switching control signal from the first transistor, waiting a time duration equal to the dead time, and applying a second switching control signal to the second switching transistor and wherein the dead time is continuously updated in response to a change in the torque and a change in the rotational speed.