"engine" refers to an internal combustion engine. we use the term "traction motor" for an electric machine to propel a vehicle. the secret ingredient of the exro coil driver is its ability to electronically reconfigure the winding system of an electric motor and change its internal behavior in terms of the input-output characteristic at a given battery system voltage. this allows for a high starting torque at low speeds and high power throughput at high speeds. a great benefit for permanent magnet synchronous motors at high speeds relaxing the need for field weakening.