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Hall effect sensor

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

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






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nuckolls.bob(at)aeroelect
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PostPosted: Thu Aug 07, 2014 3:51 pm    Post subject: Hall effect sensor Reply with quote

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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