Topic: diy rectifier

[TwoTired]

http://circuitswiring.com/circuit-diagrams/14/2011/03/Honda-S65-Electrical-Wiring-Diagram.jpg

Red wire is your plus or POS terminal (output)
White wire is the power input to be rectified.  AC connection on a bridge diode.

>>>Why do you think your old rectifier is bad?<<<<

Looks like the bike runs on ac except for battery charging, horn and winker relay.
I wonder where that designer went to school?

[b52bombardier1]

That EBay rectifier will work.  25 amps of capacity at 1000 volts peak inverse voltage.  The oddly turn tab on that rectifier is for your battery - that tab is the rectifier output.

  Diagonally, across to the far corner of the rectifier is for the bike ground wire.

  The other two tabs are the AC inputs to the rectifier and the colors don't matter.  As long as these wires are the stator outputs, they can go to either of the remaining two tabs.

  Some conductive heat sink paste can be useful here.  No ground through the case here is needed here but a bolt through the hole in the middle using a flat piece of sheet metal as a cooling fin would help.

  Use some shrink tubing on the wire connectors at the tabs.

Rick

[scottly]

Rick, in this case the - terminal isn't grounded, and should be left unconnected, as well as one of the AC inputs. Bert's bike uses only one of the four diodes in the package.

[b52bombardier1]

The Amazon rectifier you ask about above will also work - same case style and tabbed connections.  It is a 50 amp part at 1000 volts PIV.  While it's true that your bike will generate quite a high AC voltage at high RPM, it won't do a thousand volts.   No way.

  Your bike and most of mine below will see high AC voltage excursions when flipping the headlight on / off or doing the hi /lo beam switch at high RPM.   Try to not do that at high rpm.  But in either case, either of these two rectifiers will not break a sweat mounted in your bike no matter what you do.

 I have a few bikes with Radio Shack part number 276-1185 mounted as a rectifier - still 25 amps but only 50 volts PIV.  Yes, we do see short, fast AC voltage excursions of 50 or more volts on our six volt bikes that could blow diodes in the RS part when messing with the headlight at high RPM.  So I make it a habit of throttling down when playing with the headlight.

  But with either of the two rock crusher rectifiers you are interested in, they will laugh off anything you throw at them other than wrong installations or a dead short somewhere.

Rick

[b52bombardier1]

In one of the early posts, I thought he indicated that he had two (stator??) wires??? If he only has one stator wire, then I think the simpler design used for a Honda CT70 would be more appropriate and not this style of cased rectifier.

Rick

[scottly]

He stated his rectifier has two wires, not his stator. My 1966 c200 90 would have used all four posts on the same style rectifier. I'm not sure what a CT70 used, even though I used to have one, but even though a full wave bridge rectifier is overkill, it's so much cheaper than the original part that it's a no-brainer.

[scottly]

here is a good one..can get it as 2 and 3 fase..and costs not a lot..like a cooling plate(..and not shure if it need to be isolated from the frame)

No, this style does not need to be isolated from the frame; it can be bolted directly to a heat sink, and the heat sink directly to the frame.
PS They are either single phase (four terminals) or three phase (five terminals).

[strynboen]

this is korekt for non regulatter systems on most mopeds vho have 6 volt..think a diode brigde vith 4 diodes vill give to heigh autput..this systems have indbuild some vaste..as they only use the half sinus curve..

[bert96]

I bought the amazon rectifier,but they said i'll recieve it in august....
Is it better if I install heat sink on the rectifier ?

Bert

[Jmed22]

I recently replaced my 67 Honda cl90 with the RadioShack rectifier upgrade and works perfect. Paid under $5 for it and installed an old heatsink for #$%*s and giggles. Suppose to help out with battery charging etc.

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