Guru
Joined: 09/08/2007
Location: AustraliaPosts: 4406
| Posted: 11:35pm 02 Dec 2019 |
Here is a shot of my "hardware only" feed forward control board.
The big chip at the top is an ICL7109 adc, the chip immediately below is a W27C020, 256K x 8 rom.
Notice that the only connections to it are for the fused dc input (at the top) and all the gate driver outputs to the four inverters (along the bottom).
There is no feedback or any other connection to the board.
An absolute minimum of wiring is required.
This is Andrew's Nano driven feed forward board, it plugs straight in.
The aluminium plate has threaded plastic spacers to allow either board to fit.
This inverter has been running constantly for a year and I keep swapping the two different boards back and forth occasionally.
Both have absolutely identical control characteristics and its impossible to know which is in there without actually looking.
Edited 2019-12-03 09:48 by Warpspeed
Cheers, Tony.