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Sensor Definition for a Hall Effect current sensor (Read 1129 times)
Oct 19th, 2017 at 7:41pm

Doug1   Offline
Frequent Poster
I love flying!

Posts: 27
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Hi
All

Here is a definition for another Hall Effect Current Sensor, range 0 to 30amps.
The ACS715 sensor is about the size of a postage stamp, made by Pololu and costs about $10
The shunt resistance is only 1.2 milliohms
Built in isolation of 2100 volts prevents any ground loops affecting the measurement.
Accuracy is about +/-1.5%

sensor={
     id=HALL EFFECT SHUNT (ACS715)
     function=AMPS
     pins=C37_P4 C37_P6 C37_P7 C37_P8 C37_P9 C37_P10 C37_P11 C37_P12 C37_P20 C37_P21 C37_P22 C37_P23 C37_P31
     name=AMPS
     min_val=0
     max_val=30
     resolution=1
     round=.1
     is_piecewise=0
     low_coeff={
           c_x4=0
           c_x3=0
           c_x2=0
           c_x1=7.5188
           c_x0=-3.7594
           }
     low_resistance=NONE
     low2high_cross=0
     high_coeff={
           c_x4=0
           c_x3=0
           c_x2=0
           c_x1=0
           c_x0=0
           }
     high_resistance=NONE
     high2low_cross=0
     shift=5
     }

BTW there are other models available with different current ranges but will require a different definition

Doug
 
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Reply #1 - Jan 3rd, 2018 at 8:21am

skydiver   Offline
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Posts: 42
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Doug, please check PM
 
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Reply #2 - Jan 6th, 2018 at 10:10pm

Doug1   Offline
Frequent Poster
I love flying!

Posts: 27
**
 
Hi All

Here is a another definition for another Hall Effect Current Sensor, the Pololu ACS714
with a range of -30 to 30amps.

Accuracy is also about +/-1.5%

sensor={
id=HALL EFFECT SHUNT (ACS714 -30to30)
function=AMPS
pins=C37_P4 C37_P6 C37_P7 C37_P8 C37_P9 C37_P10 C37_P11 C37_P12 C37_P20 C37_P21 C37_P22 C37_P23 C37_P31
name=AMPS
min_val=-30
max_val=30
resolution=1
round=.1
is_piecewise=0
low_coeff={
c_x4=0
c_x3=0
c_x2=0
c_x1=15.1515
c_x0=-37.8788
}
low_resistance=NONE
low2high_cross=0
high_coeff={
c_x4=0
c_x3=0
c_x2=0
c_x1=0
c_x0=0
}
high_resistance=NONE
high2low_cross=0
shift=5
}

Doug
 
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Reply #3 - Jan 7th, 2018 at 3:38pm

skydiver   Offline
Frequent Poster
I love flying!

Posts: 42
**
 
Much thanks to you Doug. I really appreciate your time investment. It is amazing the actual size of this little bugger.
I am swapping out a GRT CS01 that has never produced an accurate indication.
 
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