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Home > Archive > Alternative Power sources > December 2005 > Yamaha Generator Efficiency
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Yamaha Generator Efficiency
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| a12vman 2005-12-23, 11:21 am |
| I just picked up my 6600 Yamaha yesterday from the dealer, it needed a
tuneup. I was speaking with the mechanic about what things I should do
maintenance wise. One thing he mentioned that really surprised me was to
run the generator once a month with a load on it. He said that over time
the generator will lose it's charge and that it will not be able to produce
max power.
Has anyone heard of this? There is no mention of this in the owner's manual,
but it seems like the guy knows what he's talking about.
Thanks In Advance,
-a12vman
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"a12vman" <a12vman@hotmail.com> wrote in message
news:r7Uqf.223086$tD4.65335@tornado.ohiordc.rr.com...
:I just picked up my 6600 Yamaha yesterday from the dealer, it
needed a
: tuneup. I was speaking with the mechanic about what things I
should do
: maintenance wise. One thing he mentioned that really surprised
me was to
: run the generator once a month with a load on it. He said that
over time
: the generator will lose it's charge and that it will not be
able to produce
: max power.
:
: Has anyone heard of this? There is no mention of this in the
owner's manual,
: but it seems like the guy knows what he's talking about.
:
: Thanks In Advance,
: -a12vman
:
:
Maybe he thinks the permanent magnets will lose their polarity or
something like that. It -can- happen, in which case there are
solutions, but not from not being run monthly ... the running a
gennie once a month is more to keep the fuel/oil/air system in
working order and not gummed up so it'll start when you need it.
Right advice, wrong reasoning, it sounds like.
I check over and make sure I run mine every 4 to 6 weeks, but
it's just to be sure it's startable and functional; battery not
dead, carb not gummed up, oil is OK, etc..
HTH,
Pop
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| Robert Morein 2005-12-23, 10:21 pm |
|
"a12vman" <a12vman@hotmail.com> wrote in message
news:r7Uqf.223086$tD4.65335@tornado.ohiordc.rr.com...
>I just picked up my 6600 Yamaha yesterday from the dealer, it needed a
>tuneup. I was speaking with the mechanic about what things I should do
>maintenance wise. One thing he mentioned that really surprised me was to
>run the generator once a month with a load on it. He said that over time
>the generator will lose it's charge and that it will not be able to produce
>max power.
>
> Has anyone heard of this? There is no mention of this in the owner's
> manual, but it seems like the guy knows what he's talking about.
>
> Thanks In Advance,
> -a12vman
The rotor of a basic genhead, AC or DC, can demagnetize over time. This is
because the traditional genhead contains no permanent magnets. It uses the
current it generates to excite AC electromagnets in the rotor. But to get
started, there has to be enough residual magnetization left in the rotor to
generate some initial current flow.
However, I get the impression that modern generators, at least those with
electric start, are immune to the effect, because part of the starter
circuit remagnetizes the rotor.
The type of genhead found in modern inverter-generators, which has a rotor
composed of permanent magnets, is immune to the effect.
Your mechanic is an old hand. I doubt this applies to a 6600. The timespan
over which the effect has been seen is more like six months. But you should
run your generator monthly in order to prevent motor corrosion and dry
starts.
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| m Ransley 2005-12-24, 12:21 am |
| I own a generac portable 7500 and was told by one of their people in
charge at the factory that it needs to be run no longer than every 6
months with any load, or the gen could loose residual magnatism since it
is not a unit with an exciter. If magnitism is lost it will generate no
power at all, there is a procedure in their repair manual they sent me
called "flashing the field" to restore magnitism. Running every month
or month and half is not necessary. You should store your unit without
gas, run it dry. but periodic testing must be done with a load 100
watts is fine. It will either make full power or none, there is no
inbetween that periodic running will help. Every four to 6 months is
good enough to keep it from demagnitising.
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| Martin Riddle 2005-12-24, 5:21 pm |
| "m Ransley" <ransley@webtv.net> wrote in message news:19064-43ACBE61-114@storefull-3131.bay.webtv.net...
> I own a generac portable 7500 and was told by one of their people in
> charge at the factory that it needs to be run no longer than every 6
> months with any load, or the gen could loose residual magnatism since it
> is not a unit with an exciter. If magnitism is lost it will generate no
> power at all, there is a procedure in their repair manual they sent me
> called "flashing the field" to restore magnitism. Running every month
> or month and half is not necessary. You should store your unit without
> gas, run it dry. but periodic testing must be done with a load 100
> watts is fine. It will either make full power or none, there is no
> inbetween that periodic running will help. Every four to 6 months is
> good enough to keep it from demagnitising.
>
Flashing the field is just an inconvience, Ive done this on one occasion and it wasnt a big deal. You just need to know when to do
it ;D
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| Mark Dunning 2005-12-25, 5:21 pm |
| OK
My son is bringing an old Onan 4KW RV generator back to life in Power Tech
class in high school.
It has been 4 years since the generator was run, and I do not know if it was
putting our power even then.
I did see it run before I bought the unit.
It is out of a 1973 motor home.
He got the 2 cyl engine running last week. When he reports back after the
new year, they will try to get AC power out of it.
Does anybody have an overview of how "Flashing" a genset is accomplished?
Or a link?
I seem to recall that automatiive generators had to be polarized prior to
functioning correctly.
Thanks
Mark ( Ignorant on this, too) Dunning
markshere2 at yahoo dot com
"Martin Riddle" <martinriddle@hotmail.com> wrote in message
news:DIirf.648$yx.294@trndny01...
> "m Ransley" <ransley@webtv.net> wrote in message
> news:19064-43ACBE61-114@storefull-3131.bay.webtv.net...
>
> Flashing the field is just an inconvience, Ive done this on one occasion
> and it wasnt a big deal. You just need to know when to do
> it ;D
>
>
>
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| |
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| In article <1135543664_12259@spool6-east.superfeed.net>,
"Mark Dunning" <markshere2@zoominternet.net> wrote:
> OK
> My son is bringing an old Onan 4KW RV generator back to life in Power Tech
> class in high school.
> It has been 4 years since the generator was run, and I do not know if it was
> putting our power even then.
> I did see it run before I bought the unit.
> It is out of a 1973 motor home.
> He got the 2 cyl engine running last week. When he reports back after the
> new year, they will try to get AC power out of it.
>
> Does anybody have an overview of how "Flashing" a genset is accomplished?
> Or a link?
>
> I seem to recall that automatiive generators had to be polarized prior to
> functioning correctly.
>
> Thanks
>
> Mark ( Ignorant on this, too) Dunning
> markshere2 at yahoo dot com
>
You might want to check out the Old Onan Geerator Board on
SmokStak.com...
Lots of guys with many years of Onan Expertiese hang out there....
Me
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| Martin Riddle 2005-12-26, 9:21 pm |
| "Mark Dunning" <markshere2@zoominternet.net> wrote in message news:1135543664_12259@spool6-east.superfeed.net...[color=darkred]
> OK
> My son is bringing an old Onan 4KW RV generator back to life in Power Tech
> class in high school.
> It has been 4 years since the generator was run, and I do not know if it was
> putting our power even then.
> I did see it run before I bought the unit.
> It is out of a 1973 motor home.
> He got the 2 cyl engine running last week. When he reports back after the
> new year, they will try to get AC power out of it.
>
> Does anybody have an overview of how "Flashing" a genset is accomplished?
> Or a link?
>
> I seem to recall that automatiive generators had to be polarized prior to
> functioning correctly.
>
> Thanks
>
> Mark ( Ignorant on this, too) Dunning
> markshere2 at yahoo dot com
>
> "Martin Riddle" <martinriddle@hotmail.com> wrote in message
> news:DIirf.648$yx.294@trndny01...
Not sure about your particular model.
But the unit I worked on, (50hz ac powered generator) needed the exciter disconnected from the field and I applied 12vdc @ 500ma.
This was enough to get things started. My advice is not to over do it, you just need enough residual magnetism in the field to get
some voltage out of the stator so the exciter will start to function.
Merry Christmas !!
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