Problem with a fan controling by the inverter ;/

Micha³ · science forum beginner Joined: 21 May 2005 Posts: 14

Hi!
I've got, I believe, an easy problem that I can't solve ;/ My
situation look like this: an air flow through the fan is controlled now
by the guide ring. A fan works in its normal rotation, pressure and
flow. I need to change control by the guide ring on inverter connected
with the fan. And here appear my first problem. When I use an inverter,
I'll be able to change a rotation then I'll decrease pressure to the
level that I have already (when I have a guide ring open to the 20-30%).
And then I'll decrease also a flow - and this is my unfavorable
situation, because I can't change an air flow. It must be constant.
So - how to solve it? How to control (by the inverter) a fan to get
a stable flow and less than normal pressure? It is possibile?

--
Best regards,
Michal

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