Current sensing with inverting amplifier

Posted on September 15, 2016 at 23:22

Hi,

I have been trying to use FOC SDK 4.2 with existing hardware. The board uses inverting amplifier instead of non-inverting ones. Anyone got an idea on how to modify the code?

So far I've tried:

1. use negative value for amplifier gain:  doesn't work

2. use negative value for current shunt:   doesn't work

3. use negative gains for the current loops:  stable current loop, but will trigger ''speed feedback'' fault.

Thanks!