Youtube has some lovely clips of wind turbines self-destructing when the
brake or feather mechanism designed to cope with high winds fails.
Running at higher rpm may also exceed bearing ratings too, i.e. the
alternator life will be drastically shorted. Try revving your Chevy to
10,000 rpm for comparison !
Permanent magnet. Would that not then be a generator, not an
alternator?
This was simply because they were belted to
run at a slower RPM.
What country are you from, retard boy?
Again power is not measured in AMP, but in WATT you stupid jerks, Give it up now suckers.
This was necessary because when the engine was
turning at 3k-4k, you couldn't have the generator spinning much faster
than 4k itself or it would disintegrate from the centrifugal forces.
(unless you want to spend the $ on a variable-ratio belt drive for just
the DC generator).
Alternators are connected to the engine with a belt drive that steps-up
the RPM so that when the engine is idling, the alternator is spinning
much faster.
Wrong. ALL wind turbines gear up the rotational ratio to the driven
shaft. ALL of them. The governor is for the blades, NOT the alternator.
With today's switch mode power supply technology there really is no
reason an alternator cannot produce higher voltage and have it
electronically converted to clean, regulated power of whatever voltage
is desired for battery charging and accessory power use.
Actually, the voltage was raised to save on copper, weight and space.
Sorry, BTU,Calorie and Joules per unit time. BTU, Calorie and Joule[snip]
No, power is NEVER measured in amps. Current is measured in amps.
Power is in Watts, Joules, Calories, BTUs or horsepower. (or volt-amps
or foot-lbs per unit time)
When did the Joule, calorie, and BTU become a unit of power?
Depends on the implementation. And the alternator. And whether youNo shit. Did you spend your entire life coming to that conclusion, or
did someone just hit you upside da haed with a common sense stick?
It certainly does not require 2000 rpms either.
A Piggott wind turbine is direct drive - and since a Piggott windWrong. ALL wind turbines gear up the rotational ratio to the driven
shaft. ALL of them. The governor is for the blades, NOT the alternator.
Mabee when his gramma was wiping his mama's butt.You get so flustered you can't even write what you mean. "Power is
measured in AMP but in watt" ??? funny. I doubt that's what you meant,
but with you, one can never be sure.
If you keep the voltage fixed, you have to increase the current to get
more power, even a troll like you should agree to that. Unless you want
to shift the whole discussion to AC power transmission, but I don't
think you have the background to carry on a discussion about
torque-angles and power factor so we'll just keep to DC for your sake.
As to what I know about electrical machinery and electronics, you have
no idea what you're talking about. I was re-wiring motors and fixing
the regulators for the old-style DC generators for marine engines while
your mama was still wiping your poop of your butt.
daestrom
No, it is not. Generators were specifically less efficient at lower
engine speeds, and it had NOTHING to do with pulley ratios, you fucking
dipshit. The pulley ratio was only slightly lower, and that was due to
the larger mass that the rotor of the typical generator of the time had.
If all you are going to do is make shit up, you should stay out of a
discussion where you tout yourself as knowing about it.
There are no cars that incorporate variable ratio belt drives in
America. It is too expensive, and there is no need.
The belt drive on generators was NOT 1:1 or anywhere near it.
Cars topped out at 5500 rpm back then from the factory. It was not
until the muscle car era that rpms crept up, and that was still not for
offline production. The drive hub on the harmonic balancer and the hub
on the generator were about 2:1 up. I was building engines at the time,
and I also used a generator as a motor on one of my go-carts, so I
remember the hub sizes.
EFFICIENCY. You want lots of POWER out of a small device you need HIGHWhy add all that complexity when the field current can be varied?
And PM alternators can be shorted with an SCR or equivalent to limit
battery charging current.
John
They WERE less efficient at low speeds, but he is right - they were
also run at much lower speeds for the reason stated.
I believe you should take your own advice re: staying out of a
discussion where you do not know what you are talking about. (or your
knowledge is relatively limitted)
They WERE less efficient at low speeds, but he is right - they were
also run at much lower speeds for the reason stated.
I believe you should take your own advice
re: staying out of a
discussion where you do not know what you are talking about. (or your
knowledge is relatively limitted)
And many engines back in the generator years redlined at about 3600.
