Guru
Joined: 13/10/2014
Location: AustraliaPosts: 1877
| Posted: 02:28am 07 May 2024 |
Getting back (for a moment) to the Nano controller and Power stage designed by Wiseguy:
I have confirmed that the AC voltage regulation is good.
Running for the first time unprotected from the might of the LiFePO4 bank, Gulp!
This is a single test toriod with undersized primary, and the bad layout posted earlier on of the test inverter, incorrect value and unbalanced chokes and all, oh forgot, and no AC filter.
Zero load output voltage = 235vac @ 73% pwm
A 2.3kW resistive load dumped across the inverter = 235vac @ 79% pwm.
EDIT
Load: 4kW - 235vac - 84% pwm
Considering the state of the test inverter and waveform ringing, the Nano ADC display of voltages, current and pwm are all rock solid.
I had my AC over voltage trip when the 4kw load was unplugged - slight arc - the inverter LCD displayed why it tripped and indicated an inverter restart was needed.
I had purposely set AC trip low and bypassed the ACOC delay to see how quick the nano caught a spike, and how sensitive it was. I then set it to 280vac and it was fine, put the small ACOC transient delay code back in and it was perfect at 250vac. And again, that is with no AC output filtering.
.
Edited 2024-05-07 14:16 by KeepIS