Of course I still disagree that shorting the stator in a permanent magnet alternator causes it to get hot. Here's a discussion that backs up what I've said... that a dead short of the stator's output from a shunt regulator does not cause extra heating due to power dissipation:
https://www.physicsforums.com/thread...system.839582/
Some quotes from that discussion:
Quote:
"The common belief is that the regulator/rectifier (R/R) dissipates all surplus power. "
"Designers can control maximum current by adjusting strength of rotor magnets and number of turns on stator. They size both to meet the electrical needs of the vehicle. Which means that at probably ten or twenty or thirty amps your alternator's terminal volts will fall to zero. Power (Watts) equals Volts times Amps , so at zero volts alternator power equals zero! Regardless of current. And that ten or twenty or thirty amps is what the alternator will deliver into a short circuit."
"So the common belief is almost right - the regulator dumps not power but current. By dumping current it reduces alternator power output to zero for part of every revolution, making alternator power average just what the vehicle needs."
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That last sentence sums it up nicely. With a shunt regulator, the alternator is not putting out full power all the time!