Phase tracking three-phase generator

Posted on May 18, 2012

Using a single chip LM324 can, with active R-C networks, reduce the size of a 3-phase waveform generator, and prove useful in compact and stable 3-phase inverters. One quarter of an LM324 is used as a Wien bridge oscillator generating a pure sinusoidal waveform while the remaining parts of the LM324 are used as three 120° fixed phase shifters.

Phase tracking three-phase generator
Click here to download the full size of the above Circuit.

Initially potentiometer R3 should be varied to adjust the loop gain of the oscillator in order to start the oscillator.

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