vfd biasing methods
DESCRIPTION
This presentation explains specifically how to vary the gain & offset of VFD to make customize Voltage by Frequency curves Unlock our Online VFD Course "Learn VFD in a Day" with 57+ High Quality Video tutorials for $49 only! Course link: https://www.udemy.com/learn-vfd-in-a-day/?couponCode=slideshareTRANSCRIPT
Delta
VFD BiasingM Series
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VFD Biasing
0 5V 10V
1 Volt = 5 Hz
0 Hz
25 Hz
50 Hz
Pr.03=50Hz--Max. output Freq.
Pr.48=0%--bias adjustment
Pr.49=0 -- bias polarity
Pr.50=100% -- pot. freq. gain
Pr.51=0 -- REV disable in negative bias
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0 5V 10V
1 Volt = 5 Hz
0 Hz
25 Hz
50 Hz
10 Hz
Bias Adjustment
Bias Adjustment =
(Bias Range)/(Full range) x 100
= 10/50 x 100
= 20%
Pr.03= 50Hz--Max. output Freq.
Pr.48= 20%--bias adjustment
Pr.49= 0 -- bias polarity
Pr.50= 100% -- pot. freq. gain
Pr.51= 0 -- REV disable in negative bias
VFD Biasing
www.nfiautomation.org
0 5V 10V
0 Hz
25 Hz
50 Hz
10 Hz
Bias Adjustment
(Full Freq. Range – Bias Freq. range) / (Full voltage range) = (Bias Freq. – 0 Hz) / XV
Bias Adjustment = (XV/ Full voltage Range) x 100
Pot. Freq Gain = (Full voltage Range)/ (Effective Voltage Range) x 100
Pot. Freq Gain
-2.5V
Pr.03= 50Hz--Max. output Freq.
Pr.48= 25%--bias adjustment
Pr.49= 0 -- bias polarity
Pr.50= 80% -- pot. freq. gain
Pr.51= 0 -- REV disable in negative bias
VFD Biasing
www.nfiautomation.org
0 5V
1 Volt = 5 Hz
0 Hz
25 Hz
50 Hz
Pot. Freq Gain
10V
Pot. Freq Gain = (Full voltage Range)/ (Effective Voltage Range) x 100
Pr.03= 50Hz--Max. output Freq.
Pr.48= 0%--bias adjustment
Pr.49= 0 -- bias polarity
Pr.50= 200% -- pot. freq. gain
Pr.51=0 -- REV disable in negative bias
VFD Biasing
www.nfiautomation.org
0 5V 10V
50 Hz
15 Hz
Bias Adjustment
Pot. Freq Gain
4.28
Pr.03= 50Hz--Max. output Freq.
Pr.48= 42.8 %bias adjustment
Pr.49= 0 -- bias polarity
Pr.50= 70 % pot. freq. gain
Pr.51= 0 -- REV disable in negative bias
VFD Biasing
www.nfiautomation.org
(Full Freq. Range – Bias Freq. range) / (Full voltage range) = (Bias Freq. – 0 Hz) / XV
Bias Adjustment = (XV/ Full voltage Range) x 100
Pot. Freq Gain = (Full voltage Range)/ (Effective Voltage Range) x 100
0 5V 10V
0 Hz
25 Hz
50 Hz
Bias Adjustment
Bias Adjustment =
(Bias Voltage Range)/(Full Voltage range) x 100
= 1/10 x 100
= 10%
1
Pr.03= 50Hz--Max. output Freq.
Pr.48= 10%--bias adjustment
Pr.49= 1 -- bias polarity
Pr.50= 100% -- pot. freq. gain
Pr.51= 0 -- REV disable in negative bias
VFD Biasing
www.nfiautomation.org
45 Hz
0 5V 10V
0 Hz
25 Hz
50 HzPr.03= 50Hz--Max. output Freq.
Pr.48= ____ bias adjustment
Pr.49= 1 -- bias polarity
Pr.50= ____-- pot. freq. gain
Pr.51= 0 -- REV disable in negative bias
Pot. Freq Gain
Pot. Freq Gain = (Full voltage Range)/ (Effective Voltage Range) x 100
Bias Adjustment =
(Bias Voltage Range)/(Full Voltage range) x 100
= 1/10 x 100
= 10%
VFD Biasing
www.nfiautomation.org
Bias Adjustment
0 5V 10V
0 Hz
25 Hz
50 Hz
Pr.03= 50Hz--Max. output Freq.
Pr.48= 50%--bias adjustment
Pr.49= 1 -- bias polarity
Pr.50= 200% -- pot. freq. gain
Pr.51= 1 -- REV disable in negative bias
Pot. Freq Gain = (Full voltage Range)/ (Effective Voltage Range) x 100
Bias Adjustment =
(Bias Voltage Range)/(Full Voltage range) x 100
= 5/10 x 100
= 50%
25 Hz
50 Hz
7.5V
2.5V
VFD Biasing
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Rev
Fwd
0 5V 10V
0 Hz
25 Hz
50 HzPr.03=50Hz--Max. output Freq.
Pr.48=100%--bias adjustment
Pr.49=1 -- bias polarity
Pr.50=100% -- pot. freq. gain
Pr.51=1 -- REV disable in negative bias
Bias Adjustment =
(Bias Voltage Range)/(Full Voltage range) x 100
= 10/10 x 100
= 100%
VFD Biasing
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