Guru
Joined: 02/02/2017
Location: AustraliaPosts: 1432
| Posted: 09:20am 01 Nov 2018 |
Mark, no need for you to worry. I want to experiment with mine, first with totem pole drive, then without. All using the same DC bulk caps, same everything.
So I think I need to use mine.
Noneya:
I attach 4 versions of the code, all running on the same hardware.
This generates the familiar 50Hz squarewave on one 1/2 bridge and 20kHz SPWM on the other
2018-11-01_191506_uno_inverter_type3.ino.zip
This is the variable AC output frequency (about 40 to 90Hz) version of SPWM on both 1/2 bridges. Soft start and soft stop.
2018-11-01_191526_uno_inverter_2x_sinewave_pwm_vf_output_freq.ino.zip
This is outputs a fixed 50Hz output but with variable PWM from 2kHz to 100kHz approx.
2018-11-01_191549_uno_inverter_2x_sinewave_pwm_vf_pwm.ino.zip
This outputs a fixed 50Hz using SPWM on both 1/2 bridges.
2018-11-01_191607_uno_inverter_2x_sinewave_pwm.ino.zip
I can aid anyone with the circuitry required, etc. if you choose to have a hack of my codes.
The deadtime comes with the IR2184. The pin that controls it just needs a resistor to ground. 0 ohms = 400ns, 100K Ohms = 2ms or thereabouts. Best results for me have been pretty much minimum deadtime where "best" is lowest idle input current. There is not much in it, maybe +/- 5% variance.
wronger than a phone book full of wrong phone numbers