FIELD: electrical engineering.
SUBSTANCE: invention is intended for automatic control of DC-to-AC energy converters using the pulse-frequency modulation method and can be used in electric drives built on the basis of asynchronous electric motors, power supply sources and uninterruptible power supply for computer technology and medical equipment. The pulse-frequency current control device additionally comprises a comparator, an OR-NOT logical element, a reference sinusoidal signal generator and a constant voltage source in the power circuit of a bridge inverter consisting of four semiconductor switches, an RL load and a current sensor.
EFFECT: implementation of sinusoidal pulse-frequency modulation to produce alternating current at the load and increase the reliability of the device.
1 cl, 3 dwg
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