Author Topic: it started life as a Test-rig (Read 32214 times)

voxonda · « **Reply #150 on:** August 12, 2012, 11:21:14 PM »

Thanks guys for your input,
@scottly: Have found some of these even in 50 Amp versions. Made in England.
@ Old Scrambler: Following Ken's endeavours in this field. Lights can be switched seperately. They are 55W each.
@Tintop: Have bought one of these and sold to a mate of mine, who has not mounted it yet. but will do so shortly. They do look good.

Cheers, Rob

voxonda · « **Reply #151 on:** September 19, 2012, 12:18:54 PM »

Well after the great endeavours on the Isle of Man it is time to pick up where I left and solve some minor issue's with the test-rig. First on the list is re-routing the oilline from the cooler to the tank and waiting for a new coupling. Second and somewhat bigger issue was the ground clearance. Have chosen for the remote alternator solution by using a alternator from ND, and a aluminium plate to fix it to. Am going to use a toothed belt.

Tintop · « **Reply #152 on:** September 19, 2012, 06:03:04 PM »

Looks like a good solution Rob. Just wondering if it would fit in under the carbs (partially set in the electric starter pocket?). That would lower CG, shorten the belt, and move it away from the rider's leg.

voxonda · « **Reply #153 on:** September 20, 2012, 03:38:53 AM »

Quote from: Tintop on September 19, 2012, 06:03:04 PM

Looks like a good solution Rob. Just wondering if it would fit in under the carbs (partially set in the electric starter pocket?). That would lower CG, shorten the belt, and move it away from the rider's leg.

Does not fit under the carb's, tried that also just in front of engine but this looks like best solution so far in this stage. No problem with touching with legs. CG slightly higher but is neglectable imo. Coming weekend will mount the 'sprockets'. Still a prototype, but think it'll do the job.\

turboguzzi · « **Reply #154 on:** September 20, 2012, 05:44:53 AM »

looks like a late 80's - mid 90's GSXR/bandit alternator to me.... right? great stuff, they never break

voxonda · « **Reply #155 on:** September 20, 2012, 07:02:38 AM »

Quote from: turboguzzi on September 20, 2012, 05:44:53 AM

looks like a late 80's - mid 90's GSXR/bandit alternator to me.... right? great stuff, they never break

Hey TG,

correct GSX 600F this one, same as Bandit's etc.

754 · « **Reply #156 on:** September 20, 2012, 07:37:47 AM »

I think KUBOTA makes an even smaller unit..

voxonda · « **Reply #157 on:** September 20, 2012, 09:23:39 AM »

Quote from: 754 on September 20, 2012, 07:37:47 AM

I think KUBOTA makes an even smaller unit..

I havent found it. But if it comes up, I'll give it a try too.

Tintop · « **Reply #158 on:** September 20, 2012, 06:01:34 PM »

Did a quick ebay looksee Rob - http://www.ebay.com/sch/i.html?_nkw=kubota+alternator There is a permanent magnet one that looks interesting.

voxonda · « **Reply #159 on:** September 20, 2012, 11:17:00 PM »

Would that permanent magnet be usable, Brian?

NickO · « **Reply #160 on:** September 20, 2012, 11:43:23 PM »

Rob,

If I'm not mistaken, the "kit" alternators suppiled by Honda, Kawasaki, Yamaha, Suzuki, etc, for their Superbike & Supersport models are permanent magnet single phase alternators?

Smaller and less rotating mass as they only have to cope with powering the ECU & injectors on a race bike. You would need to check that the output could cope with your required load.

You can easily check whether they are single phase or three phase, by how many wires go to the regulator/rectifier.....two wires = single phase, three wires = three phase.

Obviously three phase is more efficient, but is not necessary on a race bike (at least without lights).

turboguzzi · « **Reply #161 on:** September 21, 2012, 02:03:59 AM »

Guys, the nice thing about the suzuki alternator that Rob is using is that the rectifier is already built in there, you get straight 12V DC power ready to use

AND it will easily power two big headlights needed for night racing.
The lightweight of SBK kit alternators is nice, but useless if you they dont supply the power you need.

Those GSXR alternators are pretty ligth weight, if i remeber right have excited field voltage control, hence consume little power when not in use, unlike car/tractor kubota's they are designed to run at motorcycle RPM's, proven. Wouldnt loose too much sleep over this one...

Have a few of them here too, if anybody needs

cb1100rb · « **Reply #162 on:** September 21, 2012, 02:40:38 AM »

Hello

Why not something like this :

turboguzzi · « **Reply #163 on:** September 21, 2012, 04:07:47 AM »

cause front sprockets in 750 are covered by the cases i guess

754 · « **Reply #164 on:** September 21, 2012, 05:57:36 AM »

That and its not charging at idle in neutral, and charging varies with your speed. The beauty of the Vox setup is you can run an alternator at 1/2 speed if your bike revs twice as high as original application....

cb1100rb · « **Reply #165 on:** September 21, 2012, 07:09:23 AM »

Quote from: 754 on September 21, 2012, 05:57:36 AM

That and its not charging at idle in neutral, and charging varies with your speed. The beauty of the Vox setup is you can run an alternator at 1/2 speed if your bike revs twice as high as original application....

Yes you are right , but i don't think that not charging at idle and neutral is a problem for a race bike

voxonda · « **Reply #166 on:** September 21, 2012, 09:12:58 AM »

Again guys, thanks for the input. Appreciate it!

This is for a street/track/endurance bike so there is some 'idle' involved, second there are lights to be taken care of even during pitstops at night. Driving it from the front sprocket is something I tought of but there is not a lot of room and change of gearing is some more hassle. In this form I can undo the whole system with easy acces bolts.
But all is still 'prototype'.

lordmoonpie · « **Reply #167 on:** September 21, 2012, 11:19:12 AM »

Hey Rob, you should sepnd a few moments and give Ferret a call - http://www.motorcyclewiring.co.uk/frameset.html
What he doesn't know about motorcycle wiring and components is not worth knowing. His mind is a crazy encyclopaedia of circuit diagrams!

scottly · « **Reply #168 on:** September 21, 2012, 06:54:26 PM »

Here are a couple of pics of a permanent magnet alternator from a Japanese made Massey Ferguson diesel tractor; it is similar to the PM alternators Brian linked. It is much shallower than the conventional excited-field type, and has very little rotating mass. The magnets are glued to the inside of the cup that also serves as one half of the v-belt pulley. It would take some machine work to adapt a toothed belt. I would not spin one of these at much more than 1/2 crankshaft speed, just to be on the safe side. I was unable to find any output specifications...

voxonda · « **Reply #169 on:** September 22, 2012, 02:28:16 AM »

Thanks, will look into these permant magnet ones a bit further in development.

Cheers, Rob

voxonda · « **Reply #170 on:** September 22, 2012, 08:13:05 AM »

Today mounted the two sprockets. Now determine the length of the toothed belt I need.

MRieck · « **Reply #171 on:** September 22, 2012, 09:01:12 AM »

Rob...are you using some kind of support at the alternator end?

voxonda · « **Reply #172 on:** September 22, 2012, 09:28:42 AM »

Hey Mike,

Yes, I actually do. Tho not present on the bike yet. The intention is to use the upper rear engine mount bolt and the lower alternator mounting bolt with a short aluminium connectionplate. Will make that definitive when the belt is mounted, to be sure all stays in place.

Rob

MRieck · « **Reply #173 on:** September 22, 2012, 10:27:31 AM »

Quote from: voxonda on September 22, 2012, 09:28:42 AM

Hey Mike,

Yes, I actually do. Tho not present on the bike yet. The intention is to use the upper rear engine mount bolt and the lower alternator mounting bolt with a short aluminium connectionplate. Will make that definitive when the belt is mounted, to be sure all stays in place.

Rob

I figured Rob.

754 · « **Reply #174 on:** September 22, 2012, 12:54:21 PM »

If you use a moveable idler, belt lenth is less critical. if you can get by on battery in day racing..slack idler, put belt in pocket..and enjoy quicker revs..

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Author Topic: it started life as a Test-rig (Read 32214 times)