SOHC.co.uk Forums > CB500/550
500 four rectifier
AshimotoK0:
I suppose the original question was, can the 3-phase rectifier be used in place of a single phase one in the CB450 and it can be as suggested. Looking at the original post it was for a CB450 from '72 which should definitely have been originally fitted with the 292 'pointless' regulator. I suppose you can describe it as agricultural but we are talking 40 year ago technology, honda introducing the 3-phase system in '69 for the CB750 Sandcast and. Obviously, the later Honda 3-phase system is much better because it uses three phase stator and the output controlled by adjusting the current through the field coil with no permanent magnets involved and no brushes, unlike car alternators of the period. The 292 P/N regulator uses a thyristor to current dump when necessary so is only one up from the Triumph zener method and not particularly elegant as you say. BTW just won one of the 292 regs on Ebay for £8 inc post.
Cheers... AshD
Lobo:
Hi Ash,
I never described the pointless regulator as agricultural! (rather Zener diode system). God forbid... rather I am constantly in awe just how far ahead of the times Honda were!
Cheers,
Simon
AshimotoK0:
Point taken Simon! Somewhere in my loft I have a spare one of those 'pointless' regulators, that I will have to de-pot someday and trace out the circuit.
My Genuine 'shop manual' for the 250/350k0 is really informative as goes into battery chemistry, rectifier theory etc. etc. A really good grounding in bike electrics for me as a school boy back in 'the day'. Their 3-phase charging system is really neat in the way that there are no brushes on the field coil, it works by inducing magnetism into the rotor on the end of the crank.
BTW I have replaced individual diodes on the early CB750 3-phase recifier. You just need a good heavy duty soldering iron and some good old tin/lead solder. I also gave a spare diode to Rob with the K7 on here and he did the same too. Have not seen any posts from him since I became 'active' again.
Cheers .... AshD
Lobo:
Aye, terribly cunning the brushless generator... whilst the later manuals v.disappointing on how it all works.
Without google & blowing up the missuses Hoover, hair dryers etc every now & then.. I'd be lost.
Simon
Woodside:
Guys thanks for all the input....
When I started this thead and put. "Just a quick one"
How wrong was I.
Anyway just so you all know I am I fact an electrician by trade an am still contracting but I kinda lean to domestic/commercial and seem to always get involved in 3phase machinery repairs .?
But I am the first to admit vehicle wiring is an art form ......a sort of alchemy at times?
But give me a wiring diagram or simple instructions its just another day I the office.
I keep reading the posts and I must say I really don't know which way to go right now.
Like I said before all I have at the moment is the 3 yellows from the generator...I will only be running front / rear lights plus brake light ...and because some one has removed the kickstart I will have to rely on the starter motor
And as it was pointed out to me I really don't want to be boiling battery's .....
So I guess what I'm asking for now is in your opinions which would be the simplest solution and possibly the neatest?
And thanks again to you all
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