Fast pwm generation for h-bridge inverter

[Odion]

Hello I am a newbie here, can someone give some advice,links, steps on how to generate fast pwm 16khz for low side drives and 50hz for high side drives?

 

[BradtheRad]

For a quick answer here's a common method to generate SPWM pulses. Each pulse length derives from the sine at a given point on the waveform.

This creates SPWM for only one transistor during one-half of the AC cycle. Its counterpart transistor ('kitty-corner') conducts during that time. The other two transistors are shut off.

Then transistors exchange roles during the second half of the cycle.

 

[danadakk]

An example, single chip, most chip resources still left for other tasks -

Regards, Dana.

 

[Pastel]

Hello!

Hello I am a newbie here, can someone give some advice,links, steps on how to generate fast pwm 16khz for low side drives and 50hz for high side drives?

I'm not sure about what you mean by "fast pwm 16khz for low side drives and 50hz for high side".
Usually you want to generate a PWM with a given frequency and a variable duty.
I would suggest to do it with a microcontroller, because you have PWM-capable timers on most of
the MCUs. Once you get one to work, for example 16 kHz, you can build another slower one if you want.

 

[FvM]

I'm not sure about what you mean by "fast pwm 16khz for low side drives and 50hz for high side".
Usually you want to generate a PWM with a given frequency and a variable duty.

It refers to a simplified 2 quadrant inverter pwm scheme that switches asynchronously between transistor and free-wheeling diode instead between two transistors. This kind of inverters can only power resistive load and typically produces waveform distortions when connecting an output filter.