I am using the TL494 as a means to generate the reference PWM (frequency set to 45 kHz) for my +28 VDC to 115 VAC 400 Hz inverter. The power stage is a full "H" Bridge with the primary connected to the bridge. There are 2 output winding's. One for the 115 VAC rms 400 Hz. The other is a 7 VAC rms feedback. I input an inverted fully rectified sine wave (below) into pin 1 (1 IN+) of the TL494. The 3.5 volt level is constant ("3.5 volt crossing") which coincides with the TL494 output providing 0% duty cycle. The amplitude of the rectified AC varies depending on a voltage feedback loop I implemented using a separate feedback winding from the transformer. Voltage regulation is pretty good with and without load. My question is should I be also be regulating the current and if so does TI have a reference deign?
Thank you in advance for your support.
Sincerely,
Robert Halversen