A Novel Three-phase Sine Frequency-converted Signal Generator

A novel method of three-phase sine frequency-converted signal generator is presented.By dividing frequency into six to realize 120° precise phase-split of three-phase square wave.The negative DC feedback eliminates the charge accumulation on integral capacitor when square wave converts into triangle.The adjustable DC voltage not only changes the frequency linearly,but the amplitude of symmetrical square wave linearly.Thus,the amplitude of triangle wave is steady.And the conversion from triangle wave to sine is realized by diodes' nonlinear fitting.