regulator? - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 5 (permalink) Old 01-14-2016, 05:16 PM Thread Starter
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regulator?

I've seen our rectifier referred to as a "regulator" and I assumed it was just people being lose with words. But I've seen it enough that I have to wonder if it really does regulate power in any way. Its not clear how since the power comes from a permanent magnet and there is no field circuit to cycle to regulate the output.

Does the r/r regulate output in anyway or is it just converting to DC and stepping down to 12isv?

-Robert
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post #2 of 5 (permalink) Old 01-14-2016, 05:28 PM
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it is in fact a combination rectifier and regulator.. it rectifies the AC from the stator.. and by shunting excess energy to ground, regulates the DC output to 14 ish volts.

it does this by momentarily dumping ALL the energy produced by the stator to ground (creating heat in the regulator and stator)

the output of the R/R is actually pulsed DC, but with the battery attached, it averages out to the desired voltage.

This is a shunt style R/R, there are series style R/R's, in which the rectified output is actually regulated down internally and it outputs a relatively pure DC. With the series style regulator, the current in the stator is ONLY what is needed to produce the required output voltage. Shunt style regulators, the stator always has full current capacity flowing, with the wasted power being dumped as heat.

MOSFET regulators are more effecient than standard shunt style, and some may be series style. However, even the shunt style regulators are more effecient and generate less heat during operation.

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Last edited by michiganteddybear; 01-14-2016 at 05:33 PM.
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post #3 of 5 (permalink) Old 01-14-2016, 06:26 PM
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Quote:
Originally Posted by RobertGary1 View Post
I've seen our rectifier referred to as a "regulator" and I assumed it was just people being lose with words. But I've seen it enough that I have to wonder if it really does regulate power in any way. Its not clear how since the power comes from a permanent magnet and there is no field circuit to cycle to regulate the output.

Does the r/r regulate output in anyway or is it just converting to DC and stepping down to 12isv?

-Robert
the Rectifier/regulator does two things.. first it takes the input alternating current voltage (AC Voltage) and out puts it as Direct Current Voltage (DC Voltage). Then it regulates the DC voltage to 12-14.5 DC Volts... It regulates the DC Voltage by shunting excess voltage to ground.
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post #4 of 5 (permalink) Old 01-14-2016, 06:45 PM Thread Starter
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Thanks! That explains it. I guess the power output of the stator is small enough that it can dump it without frying the regulator too often.


-Robert
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post #5 of 5 (permalink) Old 01-14-2016, 11:38 PM
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As long as ya keep em cool. Some relocate them away from the goats belly.they seem to last longer when kept away from heat

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