Today's Message Index:
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1. 05:21 AM - Re: PM ALTERNATOR AC OUTPUT (Ken)
2. 05:21 AM - Re: Re: Clamp On DC Multimeters... (Ken)
Message 1
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| Subject: | Re: PM ALTERNATOR AC OUTPUT |
Hi Peter
I get over a 100 vac from mine like that depending on engine speed. It
isn't going to charge at all unless you have something like almost 20vac
going into the regulator rectifier. Are you sure you aren't measuring
with a DC meter?
Yes some of those units will operate with just a large capacitor and no
battery but I would hesitate to try that without a load connected unless
you know your combination of parts will do that.
Ken
Peter H wrote:
>
>Hi,,
>I have only 0.2V AC output from the stator of my single phase PM alternator when
the battery is disconnected. Is this correct?
>Is there any way to get full regulated DC output from a PM alternator if the battery
is isolated from it?
>Thanks,
>Peter H
>
>
>
>
Message 2
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| Subject: | Re: Clamp On DC Multimeters... |
For starter current diagnoses, I find that a very cheap automotive store
magnetic meter is sufficient. Not very accurate but for a couple of
dollars, good enough to detect excessive draw. You just hold it beside
the wire and the meter is directly deflected by the magnetism. With
$20. ac clamp on meters from China around now, I keep expecting to see a
cheap clamp on dc hall effect meter but I haven't seen one yet.
Ken
jetboy wrote:
>
>Greg,
> You might find a similar one for your needs at Newark / Farnell / Radiospares
catalogues. ISO - Tec is a nice small low cost type or go for a Fluke.
My one is 400 amps DC Sanwa and works well. If you are going to measure starter
currents you will need this range. This is a required item for diagnosing
Rotax 912 problems as described in their SB. Clamp meters are very handy for checking
current drain and charging systems. A normal DMM with 20A range can do
most things but many of the clamp meters include the DMM functions too.
>
>Ralph
>
>
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