Rodbolt, Are You Around?

[dogsdad]

I'd like to pick your brain on some stuff. I know you won't steer me wrong.<br /><br />-dd-

 

[remmer38]

Re: Rodbolt, Are You Around?

A little chance is all I ask

 

[dogsdad]

Re: Rodbolt, Are You Around?

Sure thing Remmer.<br /><br />It's actually the same thing I asked on another thread: Why is one side of the stator's charging coil ties to the regulator?<br /><br />It's obvious why the rectifier's output is tied to the regulator---that's the charging voltage. But it is NOT obvious, at least to me, why this other wire is connected to the regulator. Knowing how the regulator's configured might provide a clue, but I don't have that info.<br /><br />I'm almost to the point of guessing that it has something to do with a reference for the tachometer circuit, but I don't want to guess...I want to know (I'm funny that way).<br /><br />I am not too far from believing that Mercury engineers are a sadistic bunch and are always dreaming up ways of doing things that will keep folks from ever even guessing how all this stuff works! <br /><br />The reason I wanted to consult Rodbolt is that I know he went to the same Navy electronics schools that I did and he's been spot-on in the past in helping me out. <br /><br />Oh, BTW, my motor's a 1991 135-horse with 16-amp stator.<br /><br />If you can answer the question, I'd hold you in high esteem. If you can't, I'll like ya anyway just fer tryin'.

 

[remmer38]

Re: Rodbolt, Are You Around?

Im an ex 18 AT2(AW). Yo. Maybe I went to one of them there schools also. I am thinking of the propertys of a voltage regulator. It is keeping voltage in a certain range by using a rectifying system. The stator in this case is putting out a different rpm range of voltages. When your taking a wide range and having to make it the working voltage, It has to be rectified. Does this wire rectify and regulate the ignition system? Make the spark all happy happy? I was thinking if I saw the other post I would be of some help. <br /><br />Heres to Scuba Jim and Roy.<br /><br />Capt Emmer x AT2(AW) VFA-131

 

[dogsdad]

Re: Rodbolt, Are You Around?

Remmer, an ex-AX2 here...went to school at NAS Memphis, 1976-77. Assigned VP-24 out of NAS Jacksonville, FL.<br /><br />I was kinda thinkin', since the other end of that same charging coil also provides the tachometer signal, that the end tied to the regulator does something to help the tach signal work. Maybe something to do with a DC reference...<br /><br />I think knowing how that regulator is built may make it clear. Then again, maybe not.

 

[KCLOST]

Re: Rodbolt, Are You Around?

dogsdad,<br /><br />Is there more than two wires tied to the regulator?<br /><br />Mine just has a red and a white, two wires total, and the regulator is grounded to the block....<br />Are you saying that you have another wire that bypasses the rectifier and runs directly from the stator to the regulator?

 

[dogsdad]

Re: Rodbolt, Are You Around?

KCLOST...the two wires from the charging coil are connected to the two inputs to the rectifier. For the moment, forget about the rectifier and those connections. That leaves one side of the coil conected to the shift/throttle assembly (I believe it drives the tach ultimately) and the other side of that coil connected to the regulator. Remember, this is in ADDITION TO the setup of the rectifier and regulator for battery charging. <br /><br />I am not saying anything bypasses anything else. When you have several points tied together by a conductor, it does not matter what order the physical arrangement happens to be. There is not difference in potential, or voltage, between any points that are connected by wire (unless the wire is being asked to conduct more current than it is designed to do). <br /><br />The fact that one side of the coil happens to be physically connected to the rectifier, then another wire connects that point physically to the regulator means that the coil is directly connected to the regulator.

 

[KCLOST]

Re: Rodbolt, Are You Around?

Just making sure....<br /><br />All I can tell you is that the regulator is "regulating" the voltage coming from the charging coil.. Or another term would be the "low-speed winding" I believe...<br />There is a low-speed and high speed winding on the stator. They both generate voltage... One generates about 20v and the other around 180V. 20v for the charging and 180v for the switchboxes... That 20v is what is being regulated.... <br />I believe this is what is happening. If I'm wrong I'd diffinitely want to be corrected...

 

[dogsdad]

Re: Rodbolt, Are You Around?

KCLOST...I wouldn't say that your idea is flat-out wrong, in fact I would guess that you're right to some extent. But, regulators generally take a dc voltage and make a BETTER (cleaner) dc voltage out of it. The coil output that is tied to one post of the regulator is an AC voltage, and that is what's puzzling. I am beginning to believe that the regulator is holding that side of the coil at a dc reference and that would necessarily have an effect on the side of the coil that feeds the tach.<br /><br />Once I get my stator straightened out, I will take a few measurements and see what is going on.

 

[rodbolt]

Re: Rodbolt, Are You Around?

hello<br /> hey dogsdad<br /> exactly what are you trying to figguer out? its an altenator. the stator also has two pick off coils to power up the ign system. the high and low speed windings have nothing to do with battery charging. period.<br /> the battery charging coils are totally seperate electrically. if your engine has the three post rectifier that is all it does, it rectifies. on that model the regulator is a zener diode assy. it grounds part of the stator output at a predetermined level to prevent over charging.<br /> so what is the question?<br /> good luck and keep posting<br /> FC2 RET <br /> have a nyce day

 

[dogsdad]

Re: Rodbolt, Are You Around?

Rodbolt, where ya been hiding? <br /><br />I don't have any problem with understanding the charging. The question is regarding the two connections on the regulator. One of them obviously regulates the charging output of the rectifier---no mystery there. But the other connection to the regulator comes directly from one side of the charging coil. The other side of the coil goes to the throttle/shift assembly and presumably drives the tachometer.<br /><br />I've been giving it some thought...and if you disregard the rectifier and its inputs and its output to one post of the regulator, you are then left with the coil connected to the regulator at one end and the tachometer at the other. My [tentative]conclusion is that it has to do with limiting the voltage of the drive signal for the tach.<br /><br />Like I said, when I get my stator atraightened out, I'll take some measurements to try and debunk or verify that. If you recall, my charging coil seems to have shorted itself to ground making it appear to be a tapped coil---and that led to great confusion on my part.

 

[remmer38]

Re: Rodbolt, Are You Around?

Go Navy!!!!!!!!! We used to joke about getting on the carrier to rest up and chow down. LOL.