Guru
Joined: 17/10/2017
Location: BelgiumPosts: 462
| Posted: 09:01pm 31 Mar 2024 |
That grounding point, just under the sf20dg diode should be removed otherwise you short out the current sensing resistor.
If you are running for 180VDC you won't needing 10000uF to test with, something like 1000uF will do, but keep in mind this capacitor should be rated for at least 2A ripple current depending on the output inductor.
(this is for calculation with about 8.5A, 180V bus and 1mH, 10uF )
This is a nice article for heaving some understanding:
https://www.ecicaps.com/tech-tools/technical-papers/selecting-film-bus-link-capacitors-high-performance-inverter-applications/
Try finding the eg8010 datasheet there is much more info to be found in it.
https://www.lz2gl.com/data/power-inverter-3kw/eg8010_datasheet_en.pdf
Yes pin 15 is necessary for testing, if it's not sensing output voltage it will try start by widening the pwm dutycycle and repeat this a few times before shutting down.
You can fool this pin to connect a potentiometer between the ground and 5V and connect the wiper to it. I think it want's to see 3V.
For the current this is 0.5V, people had bad expierence with the current feedback, try not to make short circuits in the first place.
To get familiar with the circuit you might want to test it first on lower voltages.
Edited 2024-04-01 07:10 by nickskethisniks