Abstract: An electric car is powered from a primary power source in the form of a three-phase parallel resonant electric motor operated at a constant speed (the speed of resonance). The electric motor is provided with operating power from an invertor coupled to storage batteries in the electric car. The motor drives a main hydraulic pump, which is hydraulically connected with a pair of variable displacement drive motors, each connected to different drive wheels on opposite sides of the vehicle. The fluid flow through the pump is varied from 0% to 100% to control the speed of operation of the drive motors connected to the drive wheels of the vehicle.