Generator zur Erzeugung eines niederfrequenten Wechselstroms zur Speisung eines Elektromotors und Servosystem mit einem derartigen Generator und einem vom Generator gespeisten Asynchronmotor

摘要

A motor speed control system that features a low-frequency generator for producing a variable frequency output voltage that varies as a function of a control signal. Motor speed is adjusted by varying the frequency of the stator voltage. The low-frequency generator supplies the adjustable stator voltage by sampling an AC reference signal of a frequency that is higher than the desired stator voltage frequency. The sampling pulses are synchronized with the reference signal and the amplitude of the reference signal is variable as a function of the control signal, i.e., the output frequency.