Some how this new control scheme does not make any sense!OK, but this is a Fixed speed pump.
Why wouldn't the following work for controlling this fixed speed pump?
I see some contradictions in the control loop.
Where did the speed sensor come from all the sudden!!!
As I said in the first few pages of this thread and was just mentioned on this page again, Your motor will not start like this!!!!!!!!!!!!
This setup is fundamentally flawed. You are trying to put bandaids on a system that can't work right.
Your best bet is to throw it all out and start over!
Sorry for shouting but you are just not getting it,
I never shouted before ever, but I thought you were more open to commonsense.
Even if you were able to deal with the pump suddenly running dry it still will not start and will have other problems.
You really need to consider running your brushless motor in a more conventional way.
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