AeroElectric-List Digest Archive

Sun 01/17/16


Total Messages Posted: 12



Today's Message Index:
----------------------
 
     1. 06:51 AM - Re: Azul sunset, Ojochal (Ron Raby)
     2. 08:19 AM - Re: Re: Schematic for twin PM alternators (ashleysc@broadstripe.net)
     3. 08:26 AM - Re: Re: Schematic for twin PM alternators (ashleysc@broadstripe.net)
     4. 09:11 AM - Re: AEC 12A z diagrams cropped?? (Robert L. Nuckolls, III)
     5. 09:13 AM - Re: Re: Schematic for twin PM alternators (Robert L. Nuckolls, III)
     6. 09:38 AM - Re: Re: Schematic for twin PM alternators (Charlie England)
     7. 09:38 AM - Re: Re: Schematic for twin PM alternators (Ken Ryan)
     8. 10:09 AM - Re: Re: Schematic for twin PM alternators (ashleysc@broadstripe.net)
     9. 12:00 PM - Re: Re: Schematic for twin PM alternators (Charlie England)
    10. 03:23 PM - Re: Re: Schematic for twin PM alternators (ashleysc@broadstripe.net)
    11. 03:45 PM - Re: Re: Schematic for twin PM alternators (Robert L. Nuckolls, III)
    12. 04:07 PM - Re: Re: Schematic for twin PM alternators (C&K)
 
 
 


Message 1


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    Time: 06:51:28 AM PST US
    Subject: Re: Azul sunset, Ojochal
    From: Ron Raby <ronr@advanceddesign.com>
    SXRzIHRoZSBoZWF0LCBpIHRoaW5rCgoKU2VudCBmcm9tIG15IFNwcmludCBTYW1zdW5nIEdhbGF4 eSBTwq4gNi4tLS0tLS0tLSBPcmlnaW5hbCBtZXNzYWdlIC0tLS0tLS0tRnJvbTogamFuIFJleW5v bGRzIDxqcmV5bm8xMDYwQGFvbC5jb20+IERhdGU6IDAxLzE2LzIwMTYgIDQ6MzQgUE0gIChHTVQt MDY6MDApIFRvOiBSb24gUmFieSA8cm9uckBhZHZhbmNlZGRlc2lnbi5jb20+IENjOiBFbGl6YWJl dGggRm9zc2V0dCA8ZWxpemFiZXRoZm9zc2V0dEB5YWhvby5jb20+IFN1YmplY3Q6IFJlOiBBenVs IHN1bnNldCwgT2pvY2hhbCAKVGhhbmsgeW91IMKgZm9yIHNlbmRpbmcgdGhpcyEgU28gZ2xhZCBJ IGhhdmUgdGhpcyBtZW1lbnRvIG9mIHRoZSBmdW4gbmlnaHQhISBHcmVhdCBjaG9pY2VzISBCdXQg SSBtdXN0IGJlIGdldHRpbmcgb2xkIEkgcmVhbGx5IG5lZWRlZCBhIG5hcCB0b2RheSHCoAoKU2Vu dCBmcm9tIG15IGlQaG9uZQpPbiBKYW4gMTYsIDIwMTYsIGF0IDE6NDkgUE0sIFJvbiBSYWJ5IDxy b25yQGFkdmFuY2VkZGVzaWduLmNvbT4gd3JvdGU6CgoKCgoKU2VudCBmcm9tIG15IFNwcmludCBT YW1zdW5nIEdhbGF4eSBTwq4gNi48MjAxNjAxMTVfMTc1NzA1X3Jlc2l6ZWQuanBnPg=


    Message 2


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    Time: 08:19:43 AM PST US
    From: ashleysc@broadstripe.net
    Subject: Re: Schematic for twin PM alternators
    Hi Charlie; For a start get on EBAY and input: "Permanent Magnet PM Alternator Fits Isuzu" It should come up as the first item listed. The manufacturer is named "LActrical". These units are most likely built in China, so you have to accommodate your fears, expectations, prejudices, if any, to that. (My personal belief is that there is a range of quality being manufactured in China ranging from terrible to excellent.) These units appear to be well made, but I have not run them yet.=C2- Once you know what you are looking for, you can probably get the cost down to a bout $75.=C2- Note that the internally regulated ones have a black plasti c infill on the back side.=C2- If it looks hollow back there, it is the e xternally regulated version.=C2- Knowing this allows a quick visual sorti ng as you scroll down the various EBAY and Amazon offerings. Cheers! (and good luck):=C2-=C2- Stu. ----- Original Message ----- From: "Charlie England" <ceengland7@gmail.com> Sent: Saturday, January 16, 2016 9:26:25 PM Subject: Re: AeroElectric-List: Re: Schematic for twin PM alternators On January 16, 2016 10:05:28 PM CST, ashleysc@broadstripe.net wrote: Hi All; Please allow a 75 year old from New England, the home of sarcastic humor, t o note: So many e-mails entitled; "Schematic for Twin PM Alternators." So few sche matics actually presented. I have two identical 12 V, 20 amp permanent magnet, internally regulated al ternators for which I have not yet developed a schematic. That's why I'm interested. Cheers! Stu. ----- Original Message ----- From: "user9253" <fransew@gmail.com> Sent: Saturday, January 16, 2016 2:54:43 PM Subject: AeroElectric-List: Re: Schematic for twin PM alternators <blockquote> Joe. I think you ma y be taking the picture too literally. You may be right. And you are right about the regulator being the weak link. Many of them made for the Rotax have failed. The alternator is unlikely to fail because it has no moving parts except for the permanent magnets that are attached to the flywheel. The magnets will not stop spinning unless the engine stops first, then you have bigger problems. Usually when the regulator fails, the voltage drops. But it would be prudent to be prepared for other failure modes like shorts to ground or over-voltage. That is why my schematic in a previous post has the relays interrupting power to the regulator DC output, to isolate a regulator that is shorted to ground from the other regulator. If the Revmaster had only one alternator, then switching the AC would be a more elegant way to cut charging power. Unless your Onex will be flown IFR, using on ly one > http://www.matronics.com/contribution </blockquote> Hi Stu, What brand/model are they? I've never seen a PM alt with an internal regula tor. I'd be interested in one as a backup. Thanks, Charlie -- Sent from my Android device with K-9 Mail. Please excuse my brevity.


    Message 3


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    Time: 08:26:46 AM PST US
    From: ashleysc@broadstripe.net
    Subject: Re: Schematic for twin PM alternators
    Hi Joe; I don't have a schematic yet. I was hoping to encounter one during the ongoing discussion. The manufacturer is "LActrical." If you get on EBAY and input "Permanent Magnet PM Alternator Fits Isuzu", one of these should be the first item listed. Once you know what you are looking for, you can get the price down to about $75 on EBAY or Amazon. Full disclosure: Although the quality looks good, I have not run mine yet. Cheers! Stu. ----- Original Message ----- From: "user9253" <fransew@gmail.com> Sent: Saturday, January 16, 2016 11:34:27 PM Subject: AeroElectric-List: Re: Schematic for twin PM alternators Hi Stu! What kind of engine and alternators do you have. It will be interesting to see the schematic that you develop. -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=452050#452050


    Message 4


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    Time: 09:11:02 AM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: AEC 12A z diagrams cropped??
    At 04:00 PM 1/16/2016, you wrote: ><ceengland7@gmail.com> > >Bob, > >A non-list-member over at another forum just asked about the >diagrams in rev12A being 'cropped'. I just downloaded it, and it >does appear to be true. Ex: z-10.8 first page to 2nd page appears >ok, but 2nd page right edge cuts off all the symbols. > >Can you take a look to see if there's a problem with the drawings? > >Thanks, > >Charlie Got a direct e-mail from the gentleman. Appendix Z in the .pdf copy of the 'connection has be repaired. Of course, the orginals are always available on the website as well. Thanks for the heads-up! Bob . . .


    Message 5


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    Time: 09:13:12 AM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: Schematic for twin PM alternators
    At 04:54 PM 1/16/2016, you wrote: > > > > Joe. I think you may be taking the picture too literally. > >You may be right. >And you are right about the regulator being the weak link. >Many of them made for the Rotax have failed. That situation along with R/R assemblies for B&C products is being evaluated. We'll have more robust recommendations for virtually all OBAM aircraft PM alternator installations. Bob . . .


    Message 6


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    Time: 09:38:45 AM PST US
    Subject: Re: Schematic for twin PM alternators
    From: Charlie England <ceengland7@gmail.com>
    Thanks for the link. From memory, the pic looks like they've just bolted a rectifier/regulator to the back of a typical John Deer/Kubota style PM alternator. I wonder if the regulator is available separately. Also wonder if it's a shunt style or switcher. Charlie On Sun, Jan 17, 2016 at 10:17 AM, <ashleysc@broadstripe.net> wrote: > Hi Charlie; > For a start get on EBAY and input: > "Permanent Magnet PM Alternator Fits Isuzu" > It should come up as the first item listed. > The manufacturer is named "LActrical". > These units are most likely built in China, so you have to accommodate > your fears, expectations, prejudices, if any, to that. > (My personal belief is that there is a range of quality being manufactured > in China ranging from terrible to excellent.) > These units appear to be well made, but I have not run them yet. Once you > know what you are looking for, you can probably get the cost down to about > $75. Note that the internally regulated ones have a black plastic infill > on the back side. If it looks hollow back there, it is the externally > regulated version. Knowing this allows a quick visual sorting as you > scroll down the various EBAY and Amazon offerings. > Cheers! (and good luck): Stu. > > ------------------------------ > *From: *"Charlie England" <ceengland7@gmail.com> > *To: *aeroelectric-list@matronics.com > *Sent: *Saturday, January 16, 2016 9:26:25 PM > *Subject: *Re: AeroElectric-List: Re: Schematic for twin PM alternators > > On January 16, 2016 10:05:28 PM CST, ashleysc@broadstripe.net wrote: >> >> >> >> Hi All; >> Please allow a 75 year old from New England, the home of sarcastic humor, to note: >> So many e-mails entitled; "Schematic for Twin PM Alternators." So few schematics actually presented. >> I have two identical 12 V, 20 amp permanent magnet, internally regulated alternators for which I have not yet developed a schematic. >> That's why I'm interested. >> Cheers! Stu. >> >> >> ----- Original Message ----- >> From: "user9253" <fransew@gmail.com> >> To: aeroelectric-list@matronics.com >> Sent: Saturday, January 16, 2016 2:54:43 PM >> Subject: AeroElectric-List: Re: Schematic for twin PM alternators >> >> >> >> >> >> Joe. I think you ma y be taking the picture too literally. >>> >> >> You may be right. >> And you are right about the regulator being the weak link. >> Many of them made for the Rotax have failed. The alternator is >> unlikely to fail because it has no moving parts except for the >> permanent magnets that are attached to the flywheel. The >> magnets will not stop spinning unless the engine stops first, >> then you have bigger problems. Usually when the regulator >> fails, the voltage drops. But it would be prudent to be >> prepared for other failure modes like shorts to ground or >> over-voltage. That is why my schematic in a previous post has >> the relays interrupting power to the regulator DC output, to isolate >> a regulator that is shorted to ground from the other regulator. >> If the Revmaster had only one alternator, then switching the AC >> would be a more elegant way to cut charging power. >> Unless your Onex will be flown IFR, using on >> ly one >> > http://www.matronics.com/contribution >> >> ------------------------------ >> >> >> >> >> >> > Hi Stu, > > What brand/model are they? I've never seen a PM alt with an internal > regulator. I'd be interested in one as a backup. > > Thanks, > > Charlie > -- > Sent from my Android device with K-9 Mail. Please excuse my brevity. > >


    Message 7


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    Time: 09:38:46 AM PST US
    From: Ken Ryan <keninalaska@gmail.com>
    Subject: Re: Schematic for twin PM alternators
    Did that overhauled over voltage protection module ever come to fruition? On Sun, Jan 17, 2016 at 8:11 AM, Robert L. Nuckolls, III < nuckolls.bob@aeroelectric.com> wrote: > At 04:54 PM 1/16/2016, you wrote: > > > > > Joe. I think you may be taking the picture too literally. > > You may be right. > And you are right about the regulator being the weak link. > Many of them made for the Rotax have failed. > > > That situation along with R/R assemblies > for B&C products is being evaluated. We'll > have more robust recommendations for virtually > all OBAM aircraft PM alternator installations. > > Bob . . . >


    Message 8


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    Time: 10:09:13 AM PST US
    From: ashleysc@broadstripe.net
    Subject: Re: Schematic for twin PM alternators
    Hi Charlie; Well, the regulator is bonded=C2- (plastic cast in place?) to the back si de, not bolted.=C2- It doesn't look like it can be easily separated, shou ld you want to replace it, or mount it remotely. Cheers!=C2-=C2- Stu. ----- Original Message ----- From: "Charlie England" <ceengland7@gmail.com> Sent: Sunday, January 17, 2016 9:36:43 AM Subject: Re: AeroElectric-List: Re: Schematic for twin PM alternators Thanks for the link. From memory, the pic looks like they've just bolted a rectifier/regulator to the back of a typical John Deer/Kubota style PM alte rnator. I wonder if the regulator is available separately. Also wonder if i t's a shunt style or switcher. Charlie On Sun, Jan 17, 2016 at 10:17 AM, < ashleysc@broadstripe.net > wrote: Hi Charlie; For a start get on EBAY and input: "Permanent Magnet PM Alternator Fits Isuzu" It should come up as the first item listed. The manufacturer is named "LActrical". These units are most likely built in China, so you have to accommodate your fears, expectations, prejudices, if any, to that. (My personal belief is that there is a range of quality being manufactured in China ranging from terrible to excellent.) These units appear to be well made, but I have not run them yet.=C2- Once you know what you are looking for, you can probably get the cost down to a bout $75.=C2- Note that the internally regulated ones have a black plasti c infill on the back side.=C2- If it looks hollow back there, it is the e xternally regulated version.=C2- Knowing this allows a quick visual sorti ng as you scroll down the various EBAY and Amazon offerings. Cheers! (and good luck):=C2-=C2- Stu. From: "Charlie England" < ceengland7@gmail.com > Sent: Saturday, January 16, 2016 9:26:25 PM Subject: Re: AeroElectric-List: Re: Schematic for twin PM alternators On January 16, 2016 10:05:28 PM CST, ashleysc@broadstripe.net wrote: <blockquote> Hi All; Please allow a 75 year old from New England, the home of sarcastic humor, t o note: So many e-mails entitled; "Schematic for Twin PM Alternators." So few sche matics actually presented. I have two identical 12 V, 20 amp permanent magnet, internally regulated al ternators for which I have not yet developed a schematic. That's why I'm interested. Cheers! Stu. ----- Original Message ----- From: "user9253" < fransew@gmail.com > Sent: Saturday, January 16, 2016 2:54:43 PM Subject: AeroElectric-List: Re: Schematic for twin PM alternators <blockquote> Joe. I think you ma y be taking the picture too literally. You may be right. And you are right about the regulator being the weak link. Many of them made for the Rotax have failed. The alternator is unlikely to fail because it has no moving parts except for the permanent magnets that are attached to the flywheel. The magnets will not stop spinning unless the engine stops first, then you have bigger problems. Usually when the regulator fails, the voltage drops. But it would be prudent to be prepared for other failure modes like shorts to ground or over-voltage. That is why my schematic in a previous post has the relays interrupting power to the regulator DC output, to isolate a regulator that is shorted to ground from the other regulator. If the Revmaster had only one alternator, then switching the AC would be a more elegant way to cut charging power. Unless your Onex will be flown IFR, using on ly one > http://www.matronics.com/contribution </blockquote> Hi Stu, What brand/model are they? I've never seen a PM alt with an internal regula tor. I'd be interested in one as a backup. Thanks, Charlie -- Sent from my Android device with K-9 Mail. Please excuse my brevity. </blockquote>


    Message 9


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    Time: 12:00:40 PM PST US
    Subject: Re: Schematic for twin PM alternators
    From: Charlie England <ceengland7@gmail.com>
    The listing I found http://www.ebay.com/itm/PERMANENT-MAGNET-PM-ALTERNATOR-Fits-ISUZU-KOKUSAN-DENKI-SMALL-ENG-12VOLT-20AMP-/301651032847?hash=item463bcd7b0f:g:bCUAAOSwstxVbPpU&vxp=mtr shows what looks like a truncated metal disc with the potting material in it, and 2 bolt heads showing in back. I assumed that the entire metal disc including the potted section would unbolt from the dynamo. The bare, unregulated dynamos look more or less like http://www.ebay.com/itm/PERMANENT-MAGNET-PM-ALTERNATOR-Fits-PERKINS-YANMAR-SMALL-ENGINES-12-VOLT-20-AMP-/271888026588?hash=item3f4dca0bdc:g:55IAAOSwBahVbPnp&vxp=mtr I googled 'ISUZU KOKUSAN DENKI wiring diagram' & found http://www.alibaba.com/product-detail/Permanent-Magnet-Alternator-Kokusan-Denki_252852606.html which basically shows a B lead & ground. Since there's no field winding, you can't depend on the switched ignition line to shut down the alternator, so IMO, you'd still need a series contactor to disconnect the B lead in an OV condition. If the diagram is accurate for your device (and likely is), then you *should* be able to treat it like a black box with a case ground and a B lead (with the L terminal tied through an indicator lamp & switch to the B lead). Charlie On 1/17/2016 12:05 PM, ashleysc@broadstripe.net wrote: > Hi Charlie; > Well, the regulator is bonded (plastic cast in place?) to the back > side, not bolted. It doesn't look like it can be easily separated, > should you want to replace it, or mount it remotely. > Cheers! Stu. > > ------------------------------------------------------------------------ > *From: *"Charlie England" <ceengland7@gmail.com> > *To: *aeroelectric-list@matronics.com > *Sent: *Sunday, January 17, 2016 9:36:43 AM > *Subject: *Re: AeroElectric-List: Re: Schematic for twin PM alternators > > Thanks for the link. From memory, the pic looks like they've just > bolted a rectifier/regulator to the back of a typical John Deer/Kubota > style PM alternator. I wonder if the regulator is available > separately. Also wonder if it's a shunt style or switcher. > > Charlie > > On Sun, Jan 17, 2016 at 10:17 AM, <ashleysc@broadstripe.net > <mailto:ashleysc@broadstripe.net>> wrote: > > Hi Charlie; > For a start get on EBAY and input: > "Permanent Magnet PM Alternator Fits Isuzu" > It should come up as the first item listed. > The manufacturer is named "LActrical". > These units are most likely built in China, so you have to > accommodate your fears, expectations, prejudices, if any, to that. > (My personal belief is that there is a range of quality being > manufactured in China ranging from terrible to excellent.) > These units appear to be well made, but I have not run them yet. > Once you know what you are looking for, you can probably get the > cost down to about $75. Note that the internally regulated ones > have a black plastic infill on the back side. If it looks hollow > back there, it is the externally regulated version. Knowing this > allows a quick visual sorting as you scroll down the various EBAY > and Amazon offerings. > Cheers! (and good luck): Stu. > > ------------------------------------------------------------------------ > *From: *"Charlie England" <ceengland7@gmail.com > <mailto:ceengland7@gmail.com>> > *To: *aeroelectric-list@matronics.com > <mailto:aeroelectric-list@matronics.com> > *Sent: *Saturday, January 16, 2016 9:26:25 PM > *Subject: *Re: AeroElectric-List: Re: Schematic for twin PM > alternators > > On January 16, 2016 10:05:28 PM CST, ashleysc@broadstripe.net > <mailto:ashleysc@broadstripe.net>wrote: > > > > Hi All; > > Please allow a 75 year old from New England, the home of sarcastic humor, to note: > > So many e-mails entitled; "Schematic for Twin PM Alternators." So few schematics actually presented. > > I have two identical 12 V, 20 amp permanent magnet, internally regulated alternators for which I have not yet developed a schematic. > > That's why I'm interested. > > Cheers! Stu. > > > ----- Original Message ----- > > From: "user9253" <fransew@gmail.com <mailto:fransew@gmail.com>> > > To:aeroelectric-list@matronics.com > <mailto:aeroelectric-list@matronics.com> > > Sent: Saturday, January 16, 2016 2:54:43 PM > > Subject: AeroElectric-List: Re: Schematic for twin PM alternators > > > > > Joe. I think you ma y be taking the picture too literally. > > You may be right. > > And you are right about the regulator being the weak link. > > Many of them made for the Rotax have failed. The alternator is > > unlikely to fail because it has no moving parts except for the > > permanent magnets that are attached to the flywheel. The > > magnets will not stop spinning unless the engine stops first, > > then you have bigger problems. Usually when the regulator > > fails, the voltage drops. But it would be prudent to be > > prepared for other failure modes like shorts to ground or > > over-voltage. That is why my schematic in a previous post has > > the relays interrupting power to the regulator DC output, to isolate > > a regulator that is shorted to ground from the other regulator. > > If the Revmaster had only one alternator, then switching the AC > > would be a more elegant way to cut charging power. > > Unless your Onex will be flown IFR, using on > ly one > >http://www.matronics.com/contribution > > ------------------------------------------------------------------------ > > > Hi Stu, > > What brand/model are they? I've never seen a PM alt with an > internal regulator. I'd be interested in one as a backup. > > Thanks, > > Charlie > -- > Sent from my Android device with K-9 Mail. Please excuse my brevity. > >


    Message 10


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    Time: 03:23:01 PM PST US
    From: ashleysc@broadstripe.net
    Subject: Re: Schematic for twin PM alternators
    Hi Charlie; 1.=C2- Well you found the right listing.=C2- I've looked at a few more alternators that are apparently the same animal, minus regulator, and it ap pears you are right.=C2- So you could have your choice: internally regula ted or remotely regulated.=C2- I don't know why all the unregulated units are more than $100!=C2- Plus you have to buy the regulator! 2.=C2- Concerning your second reference, please note it is not exactly as above.=C2- The mounting ears are not directly opposite each other.=C2- This may or may not be a disadvantage, depending on how you intend to moun t it.=C2- I wanted a symmetrical configuration, so I had the option of mo unting facing forward or aft.=C2- (These alternators don't care which way they are rotated.)=C2- As it turns out both my pulleys will be facing fo rward. 3.=C2- Thanks for the reference to the wiring diagram.=C2- I will look further into it for paralleling. two units. Cheers!=C2-=C2- Stu. ----- Original Message ----- From: "Charlie England" <ceengland7@gmail.com> Sent: Sunday, January 17, 2016 11:59:38 AM Subject: Re: AeroElectric-List: Re: Schematic for twin PM alternators The listing I found http://www.ebay.com/itm/PERMANENT-MAGNET-PM-ALTERNATOR-Fits-ISUZU-KOKUSAN-D ENKI-SMALL-ENG-12VOLT-20AMP-/301651032847?hash=item463bcd7b0f:g:bCUAAOSws txVbPpU&vxp=mtr shows what looks like a truncated metal disc with the potting material in i t, and 2 bolt heads showing in back. I assumed that the entire metal disc i ncluding the potted section would unbolt from the dynamo. The bare, unregul ated dynamos look more or less like http://www.ebay.com/itm/PERMANENT-MAGNET-PM-ALTERNATOR-Fits-PERKINS-YANMAR- SMALL-ENGINES-12-VOLT-20-AMP-/271888026588?hash=item3f4dca0bdc:g:55IAAOSw BahVbPnp&vxp=mtr I googled 'ISUZU KOKUSAN DENKI wiring diagram' & found http://www.alibaba.com/product-detail/Permanent-Magnet-Alternator-Kokusan-D enki_252852606.html which basically shows a B lead & ground. Since there's no field winding, yo u can't depend on the switched ignition line to shut down the alternator, s o IMO, you'd still need a series contactor to disconnect the B lead in an O V condition. If the diagram is accurate for your device (and likely is), then you *shoul d* be able to treat it like a black box with a case ground and a B lead (wi th the L terminal tied through an indicator lamp & switch to the B lead). Charlie On 1/17/2016 12:05 PM, ashleysc@broadstripe.net wrote: Hi Charlie; Well, the regulator is bonded=C2- (plastic cast in place?) to the back si de, not bolted.=C2- It doesn't look like it can be easily separated, shou ld you want to replace it, or mount it remotely. Cheers!=C2-=C2- Stu. ----- Original Message ----- From: "Charlie England" <ceengland7@gmail.com> Sent: Sunday, January 17, 2016 9:36:43 AM Subject: Re: AeroElectric-List: Re: Schematic for twin PM alternators Thanks for the link. From memory, the pic looks like they've just bolted a rectifier/regulator to the back of a typical John Deer/Kubota style PM alte rnator. I wonder if the regulator is available separately. Also wonder if i t's a shunt style or switcher. Charlie On Sun, Jan 17, 2016 at 10:17 AM, < ashleysc@broadstripe.net > wrote: <blockquote> Hi Charlie; For a start get on EBAY and input: "Permanent Magnet PM Alternator Fits Isuzu" It should come up as the first item listed. The manufacturer is named "LActrical". These units are most likely built in China, so you have to accommodate your fears, expectations, prejudices, if any, to that. (My personal belief is that there is a range of quality being manufactured in China ranging from terrible to excellent.) These units appear to be well made, but I have not run them yet.=C2- Once you know what you are looking for, you can probably get the cost down to a bout $75.=C2- Note that the internally regulated ones have a black plasti c infill on the back side.=C2- If it looks hollow back there, it is the e xternally regulated version.=C2- Knowing this allows a quick visual sorti ng as you scroll down the various EBAY and Amazon offerings. Cheers! (and good luck):=C2-=C2- Stu. From: "Charlie England" < ceengland7@gmail.com > Sent: Saturday, January 16, 2016 9:26:25 PM Subject: Re: AeroElectric-List: Re: Schematic for twin PM alternators On January 16, 2016 10:05:28 PM CST, ashleysc@broadstripe.net wrote: <blockquote> Hi All; Please allow a 75 year old from New England, the home of sarcastic humor, t o note: So many e-mails entitled; "Schematic for Twin PM Alternators." So few sche matics actually presented. I have two identical 12 V, 20 amp permanent magnet, internally regulated al ternators for which I have not yet developed a schematic. That's why I'm interested. Cheers! Stu. ----- Original Message ----- From: "user9253" < fransew@gmail.com > 3 PM Subject: AeroElectric-List: Re: Schematic for twin PM alternators <blockquote> Joe. I think you ma y be taking the picture too literally. You may be right. And you are right about the regulator being the weak link. Many of them made for the Rotax have failed. The alternator is unlikely to fail because it has no moving parts except for the permanent magnets that are attached to the flywheel. The magnets will not stop spinning unless the engine stops first, then you have bigger problems. Usually when the regulator fails, the voltage drops. But it would be prudent to be prepared for other failure modes like shorts to ground or over-voltage. That is why my schematic in a previous post has the relays interrupting power to the regulator DC output, to isolate a regulator that is shorted to ground from the other regulator. If the Revmaster had only one alternator, then switching the AC would be a more elegant way to cut charging power. Unless your Onex will be flown IFR, using on ly one > http://www.matronics.com/contribution </blockquote> Hi Stu, What brand/model are they? I've never seen a PM alt with an internal regula tor. I'd be interested in one as a backup. Thanks, Charlie -- Sent from my Android device with K-9 Mail. Please excuse my brevity. </blockquote> </blockquote>


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    Time: 03:45:53 PM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: Schematic for twin PM alternators
    At 11:35 AM 1/17/2016, you wrote: >Did that overhauled over voltage protection module ever come to fruition? Yes . . . its in the que for loading to the B&C production line. Bob . . .


    Message 12


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    Time: 04:07:55 PM PST US
    Subject: Re: Schematic for twin PM alternators
    From: C&K <yellowduckduo@gmail.com>
    J.Deere part numbers are AM877557 for the alternator, and AM101406 for the regulator. Unverified info is that the same regulator is also used on a 35 amp alternator. I use a little automotive 40 amp rated cube relay on an AC lead with an crowbar module for overvoltage control and have a C/B on the B lead that could theoretically also be pulled to isolate the regulator from the battery if need be. I also fitted a larger multi-V pulley and around 500 hours I replaced the pulley side ball bearing. Check out Mark Langford's KR2S website for more info. http://www.n56ml.com/ Ken On 17/01/2016 12:36 PM, Charlie England wrote: > Thanks for the link. From memory, the pic looks like they've just > bolted a rectifier/regulator to the back of a typical John Deer/Kubota > style PM alternator. I wonder if the regulator is available > separately. Also wonder if it's a shunt style or switcher. > > Charlie > > On Sun, Jan 17, 2016 at 10:17 AM, <ashleysc@broadstripe.net > <mailto:ashleysc@broadstripe.net>> wrote: > > Hi Charlie; > For a start get on EBAY and input: > "Permanent Magnet PM Alternator Fits Isuzu" > It should come up as the first item listed. > The manufacturer is named "LActrical". > These units are most likely built in China, so you have to > accommodate your fears, expectations, prejudices, if any, to that. > (My personal belief is that there is a range of quality being > manufactured in China ranging from terrible to excellent.) > These units appear to be well made, but I have not run them yet. > Once you know what you are looking for, you can probably get the > cost down to about $75. Note that the internally regulated ones > have a black plastic infill on the back side. If it looks hollow > back there, it is the externally regulated version. Knowing this > allows a quick visual sorting as you scroll down the various EBAY > and Amazon offerings. > Cheers! (and good luck): Stu. > > ------------------------------------------------------------------------ > *From: *"Charlie England" <ceengland7@gmail.com > <mailto:ceengland7@gmail.com>> > *To: *aeroelectric-list@matronics.com > <mailto:aeroelectric-list@matronics.com> > *Sent: *Saturday, January 16, 2016 9:26:25 PM > *Subject: *Re: AeroElectric-List: Re: Schematic for twin PM > alternators > > On January 16, 2016 10:05:28 PM CST, ashleysc@broadstripe.net > <mailto:ashleysc@broadstripe.net> wrote: > > > > Hi All; > Please allow a 75 year old from New England, the home of sarcastic humor, to note: > So many e-mails entitled; "Schematic for Twin PM Alternators." So few schematics actually presented. > I have two identical 12 V, 20 amp permanent magnet, internally regulated alternators for which I have not yet developed a schematic. > That's why I'm interested. > Cheers! Stu. > > > ----- Original Message ----- > From: "user9253" <fransew@gmail.com <mailto:fransew@gmail.com>> > To:aeroelectric-list@matronics.com > <mailto:aeroelectric-list@matronics.com> > Sent: Saturday, January 16, 2016 2:54:43 PM > Subject: AeroElectric-List: Re: Schematic for twin PM alternators > > > > > Joe. I think you ma y be taking the picture too literally. > > You may be right. > And you are right about the regulator being the weak link. > Many of them made for the Rotax have failed. The alternator is > unlikely to fail because it has no moving parts except for the > permanent magnets that are attached to the flywheel. The > magnets will not stop spinning unless the engine stops first, > then you have bigger problems. Usually when the regulator > fails, the voltage drops. But it would be prudent to be > prepared for other failure modes like shorts to ground or > over-voltage. That is why my schematic in a previous post has > the relays interrupting power to the regulator DC output, to isolate > a regulator that is shorted to ground from the other regulator. > If the Revmaster had only one alternator, then switching the AC > would be a more elegant way to cut charging power. > Unless your Onex will be flown IFR, using on > ly one > >http://www.matronics.com/contribution > > ------------------------------------------------------------------------ > > > Hi Stu, > > What brand/model are they? I've never seen a PM alt with an > internal regulator. I'd be interested in one as a backup. > > Thanks, > > Charlie > -- > Sent from my Android device with K-9 Mail. Please excuse my brevity. > >




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