Patent ID: 6936992

Claim:
A method of starting a load having a cyclically variable input requirement and a repeatable rest position, the method comprising: driving the load by an electric motor having a cyclically variable output, including a low output in the output cycle of the motor which is less than a peak in the variable input requirement of the load; and coupling the motor with respect to the load so that the peak input requirement of the load coincides with a region in the output cycle of the motor in which the peak input requirement is exceeded by instantaneous output from the motor and such that the cyclically variable output of the motor is rising at start-up to boost the acceleration of the load from the rest position; wherein the input requirement of the load and the output of the electric motor are torque; further wherein the cyclical variability of the output of the motor is related to the changing angular position of a rotor of the motor with respect to a stator of the motor.