Feedback Conversion - Danfoss VLT HVAC Basic Drive FC 101 Design Manual

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3.2.5 Feedback Conversion

In some applications, it may be useful to convert the
feedback signal. One example of this is using a pressure
signal to provide flow feedback. Since the square root of
3 3
pressure is proportional to flow, the square root of the
pressure signal yields a value proportional to the flow. See
Illustration 3.20.
Ref.
signal
Desired
ow
Illustration 3.20 Feedback Signal Conversion
28
VLT
Ref. +
PI
P 20-01
-
FB conversion
FB
Flow
P
FB
signal
P
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HVAC Basic Drive FC 101
P
Flow
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