Patent ID: 6438321
Filing Date: 2002-08-20
Classification: H02P

Abstract:
A motor controller for a high speed, DC electric motor comprising sensors which detect the relative position of a rotor of the motor, a speed calculator which receives position signals from the sensors and calculates therefrom the approximate relative position and speed of rotation of the rotor, a vector rotator which receives actual speed and position signals from the speed calculator, an error signal generator which generates an error signal corresponding to any detected difference between a command speed signal and the actual speed signal, a proportional integrator which receives any error signal corresponding to any detected difference between a command speed signal and the actual speed signal, a proportional integrator which receives any error signal and produces a signal for the vector rotator corresponding to a desired vertical component of the voltage vector required to achieve the command speed, and a power stage which amplifies the vector rotator output to supply to the motor.