Topic: diy rectifier

[bert96]

 I need a rectifier(2 wires) for my Honda S65,i would like to do it instead of buying one.They ask 40-60$ for this little thing!?Anyone got a link on how to do it and where to buy

materials?


Bert

[vfourfreak]

Lots of projects like this are to be found on Instructables

e.g. http://www.instructables.com/id/Make-A-Bridge-Rectifier-From-Diodes/

Kev

[strynboen]

think you can use this(12v) its have both diode brigde and stabilicer..it can be faund as 6v too..can be used both as a one vire and 2 vires aut of the stator..have to make a jumper to use it for 1 vire auttake

the 2 diragrams is the 2 vaus to konnekt the same unit..vho is a lowcost one..used on italy and chinese bikes

[bert96]

I remember an old thread about homemade rectifier for our
Sohc 4,I thought I could do the same for my s65.

Bert

[strynboen]

you can use a 220volt elektric unit too they comes in both 2 and 3 fases..and vork fine on low volt systems..so yes its easy..

[jaguar]

[strynboen]

he he he..

[bert96]

You did not see my rectifier ! !
It does not look like that!!

Will post picture.
Bert

[strynboen]

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)

[madmtnmotors]

he he he..

Ichiban cracks me up... 

[bert96]

Here,

[bert96]

Someone can school me on how to do it?

[strynboen]

i have the same on my cd 50..its only a half vay diode.so it are not a 2 fase system
.so you onlu get the half sinus kurve..but for a small battery..it just can hold it going 6v 4 amp normaly..a zenor diode can do the same job..they are valued for spec voltage..but im not Expert on them...let us vait for the Experts to ring the door bell

[bert96]

Sorry,but,someone can explain me clearly!

[TwoTired]

Looks like your old rectifier is a selenium type.

Only has to poles so it is still just a diode.  Passes current in only one direction of flow.

You can replace with a silicon diode.    Your schematic should show what the polarity should be for new diode installation.  Get one that has a 25V or higher withstand.

Do you also have a voltage regulator?

I ask because selenium usually drops near a volt and silicon drops less.

Any electronic stores near you.  Where did you plan a purchasing a replacement diode?

[bert96]

I don't think this bike have a regulator.The other owner told me there was a problem with it,and I rebuild this bike,so why not install a new one!?

Is there any other number I should look when i'll buy a rectifier?
There is 4 pins on the one I see,where do put my wires?

[bert96]

Is this one good or not,

http://www.ebay.com/itm/5pcs-KBPC2510-KBPC-2510-25A-1000V-Bridge-Rectifier-/152345634967

Is there any quality in these rectifier? Which one is the best?


Bert

[TwoTired]

4 pin rectifiers have four diodes inside them.  Usually have labels, two will have  ~  symbol (AC input).  And the other two will have + an - signs.

Your bike have positive or negative Ground?  If you have have a positive ground machine, you'll probably want to pick an AC terminal from the power generator, and a + terminal for the output to battery.

I haven't seen your circuit diagram, so there is some fuzziness about hook up details.

Cheers,

[TwoTired]

Is this one good or not,

http://www.ebay.com/itm/5pcs-KBPC2510-KBPC-2510-25A-1000V-Bridge-Rectifier-/152345634967

Is there any quality in these rectifier? Which one is the best?


Bert

It will work.

[bert96]

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

[bert96]

Is this one better?
https://www.amazon.ca/Single-Phase-Bridge-Rectifier-KBPC5010/dp/B008DEU18G

[Stev-o]

he he he..

Ichiban cracks me up... 

This is my fav....

I should have sent him my K4 jugs for 836!

[TwoTired]

Is this one better?
https://www.amazon.ca/Single-Phase-Bridge-Rectifier-KBPC5010/dp/B008DEU18G

For certain applications, yes.  For yours, it will work, but it is technically over spec.

[bert96]

Did you take a look at the wiring diagram I post?

Bert

[scottly]

There is 4 pins on the one I see,where do put my wires?

Connect the red wire to the + terminal, and the white wire to either of the AC terminals.

[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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