Phase tracking three-phase generator

  
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  - schematic

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




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