ltdrider wrote:
Here's the circuit diagram from the KZ900 (not 1000, but is probably the same) Shop Manual.
Thank you ltdrider, that illustrates it nicely.
Note that the rectifier has 3 yellows. The rectifier does not care about sequence. The regulator is what cares about sequence and that is why the regulator must keep the proper colors.
BTW I should have called it batch-shunting instead of group-shunting.
So, I'm sure you're asking yourself "why do some regulators use sequential-shunt (3 color coded) and some batch-shunt (all same color)"? Well, sequential-shunt regulates by shunting all 3 phases everytime, in sequence. Batch-shunting tries to shunt all three phases at once, but only one phase is at it's full positive cycle so only that one phase will get shunted if the battery voltage is near the threshold voltage. Theoretically, the 3 phases should get shunted randomly and evenly. But, batch-shunting often causes a situation where only the strongest of the three phases gets shunted most of the time. The batch-shunting may stress out one that one single phase of the stator. (Stators often have one phase that is slightly stronger due to inconsistent manufacturing.)
I think Kawasaki later realized that their stators are pretty damn good and didn't need the protection of sequential-shunting. So to simplify things (there has been at least one post about re-wiring the stator where the color sequence was lost!) Kawasaki, as well as most manufacturers, just went to batch-shunting. But this is only speculation.
Also, in the early days of Thyristors (SCR's), those components were more expensive. Sequential-shunting would be cheaper. But electronic components are pretty much dirt-cheap now.
Post edited by: loudhvx, at: 2006/05/04 11:39