초록 ▼

A motor controller utilizes sensors to detect the rotational speed and relative position of the motor rotor and generates a voltage vector to maintain the motor current in phase with the EMF before a voltage limit is reached. The approximate actual speed is calculated and position signals are genera

A motor controller utilizes sensors to detect the rotational speed and relative position of the motor rotor and generates a voltage vector to maintain the motor current in phase with the EMF before a voltage limit is reached. The approximate actual speed is calculated and position signals are generated by the calculator. The actual speed is compared with a command speed signal and any difference gives rise to an error signal. A proportional integrator receives the error signal and produces a correction signal for a vector rotator corresponding to the desired vertical voltage component necessary to achieve the command speed. After the voltage limit is reached, any further speed increase desired is achieved by rotation of the voltage vector with it's amplitude unchanged.

대표청구항 ▼

1. 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,

1. 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.