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Hall effect sensor

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l.p(at)talk21.com
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Posted: Wed Aug 06, 2014 12:46 pm Post subject: Hall effect sensor

Bob et al.

I have a VMS 1000 engine instumentation system that presently uses a hall effect sensor on the main alternator "B" lead to measure current for the display.

I'm now installing an auxilliary alternator on the vacuum pad which ties into the same starter contactor to battery contactor lead as the main alternator, a la Figure Z-12.



Questions:

Is it feasible to route the  starter contactor to battery contactor lead through the VMS hall effect sensor to monitor either alternator's  current?

What is the possible effect during engine start, (current going in the opposite direction ), on the sensor which is marked for a particular wire/current direction?

Any advice much appreciated.

Patrick Elliott, Surrey, England.

G-LGEZ





 

 

  



 [quote][b]

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nuckolls.bob(at)aeroelect
Guest

Posted: Thu Aug 07, 2014 3:51 pm Post subject: Hall effect sensor

At 03:42 PM 8/6/2014, you wrote:



Bob et al.



I have a VMS 1000 engine instumentation system that presently uses a 

hall effect sensor on the main alternator "B" lead to measure current 

for the display.

I'm now installing an auxilliary alternator on the vacuum pad which 

ties into the same starter contactor to battery contactor lead as the 

main alternator, a la Figure Z-12.



Questions:



Is it feasible to route the starter contactor to battery contactor 

lead through the VMS hall effect sensor to monitor either alternator's current?

What is the possible effect during engine start, (current going in 

the opposite direction ), on the sensor which is marked for a 

particular wire/current direction?



    You can run BOTH b-leads through the single hall-sensor

    which will then measure TOTAL current for both alternators

    or, obviously, current on each functioning alternator

    independently.



    Don't run starter current through the hall-sensor. It

    won't damage it but it probably WILL super-excite any

    retentive tendencies and leave you with a non-zero reading

    when indeed there is no current to be measured.

   Bob . . .

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