stranded at the gas station
- Thread starter xzvs
- Start date
Since when does any alternator provide a constant level of power without relation to rpm? The lower the rpm the less voltage and amperage an alternator puts out. Ever put a volt meter on your car battery and check the voltage at idle vs. 3K rpm? It may be better regulated and more powerful than a generator but it sure as all hell isn't constant.
A main weak point with a generator is that they had to be run much slower than engine rpm because of the commutator. If you ran the engine up to 5000 rpm and the generator matched that, it would explode internally. Through use of pulley size they were typically run at a max of 2500 rpm (½ engine speed). Fine while driving but they never charge worth a damn while idling.
As far as the whole arguement goes.....
What does AC stand for?
Yes, that's right, alternating current.
alternator, alternating, alternator, alternating....seeing a connection yet?
REGULATOR is a moot point since both alternators and generators use one whether it's internal, external, electronic or mechanical. Without it voltage would soar out of control.
RECTIFIER is used with an alternator, it converts the AC to DC.
An alternator has 3 phases each shifted by 120º.
A generator puts out DC therefore it does not use a RECTIFIER. When a commutator is used with brushes you get sort of a crappy ripple DC output.
If you have something throwing out 3 phase AC and it's using a rectifier to convert to DC, you have an alternator.
The hayabusa technically has an alternator.[/Quote]
Your absolutety correct TB ! What through me off about not believeing the Busa did not have an alt was because the bike would not run after disconnecting the positive terminal on the battery, along with not fully reading the shop manual electrical charging system.
When disconnecting the postive terminal on a car it will continue to run. I knew why, but not fully to the extent after talking to an electronic tech at work.
Anyway, to make a long story short the ET (Bob) explained to me the reasonning to this situation. Explaing that the alt by itself (on a car) can produce enough voltage for the sparkplug to maintain an idle speed but if I were to apply the lights the car would probably die while at idle. The Hayabusa alternator generator A.C is gear driven and does not have the larger pulley setup to rotate the smaller motor fast enough like a car. So, when the rpm is below 2000k (idle) the Busa relies on the battery (acting as a capacitor) to stay running until the rpm/min reaches above 2000k opening the SRC located inside the rectifier to charge the m/c electrical system.
Warning....
If anyone tries this test on your car besure to plug in a 9vlot battery kit you can purchase from Sears into you cigarete lighter to protect your electronics (ECU memory,radio etc).
Your absolutety correct TB ! What through me off about not believeing the Busa did not have an alt was because the bike would not run after disconnecting the positive terminal on the battery, along with not fully reading the shop manual electrical charging system.
When disconnecting the postive terminal on a car it will continue to run. I knew why, but not fully to the extent after talking to an electronic tech at work.
Anyway, to make a long story short the ET (Bob) explained to me the reasonning to this situation. Explaing that the alt by itself (on a car) can produce enough voltage for the sparkplug to maintain an idle speed but if I were to apply the lights the car would probably die while at idle. The Hayabusa alternator generator A.C is gear driven and does not have the larger pulley setup to rotate the smaller motor fast enough like a car. So, when the rpm is below 2000k (idle) the Busa relies on the battery (acting as a capacitor) to stay running until the rpm/min reaches above 2000k opening the SRC located inside the rectifier to charge the m/c electrical system.
Warning....
If anyone tries this test on your car besure to plug in a 9vlot battery kit you can purchase from Sears into you cigarete lighter to protect your electronics (ECU memory,radio etc).[/Quote]
Heavy is here to learn too, thats why I said it way only my .02.
<span style='font-size:15pt;line-height:100%'>From now on we will refer to the Hayabusa charging system as the BIG FAT DYNAMO!</span>
And where's my cake?
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