The generator is DC........IT does not generate AC.......Transformers are AC.....NOT DC The only way to change voltage on DC is a inverter or buck-boost converter....or change the generator.....very expensive.
charging 48v battery with 24volt input
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DerpsyDoodler
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So there is not component on an alternator that can be replaced/adjusted to produce a higher voltage?
AGAIN.....ITS NOT AN ALTERNATOR....ITS A DC GENERATOR...THIS IS NOT PRACTICABLE.......
An AC Generator or Alternator AC output can be changed to any voltage with a simple transformer
A DC Generator can be changed to a different voltage via a Inverter or buck-boost converter which chops the DC into AC.
A DC to DC converter converts the DC to AC with a buck-boost converter, buck converter, or boost converter which uses inductors and capacitors to make AC which is then transformed (via the inductor(s) and capacitor (s)) to the desired AC voltage which is then rectified back to DC
A DC to AC inverter first chops the DC input to AC which is run through a transformer to produce the required AC voltage. (very simplified)
Most common inverters operate at 50-60 Hz, buck converters, boost converters, and buck-boost converters typically operate at 25 khz. which requires much smaller inductors.
BOTH methods of changing the voltage involve inductors and capacitors to change the DC to AC
A good starter read on DC to DC conversion can be found at wikipedia : buck converters, boost converters, and buck-boost converters......read all three articles for a understanding of inductance/capacitive relationship in DC to DC conversion
An AC Generator or Alternator AC output can be changed to any voltage with a simple transformer
A DC Generator can be changed to a different voltage via a Inverter or buck-boost converter which chops the DC into AC.
A DC to DC converter converts the DC to AC with a buck-boost converter, buck converter, or boost converter which uses inductors and capacitors to make AC which is then transformed (via the inductor(s) and capacitor (s)) to the desired AC voltage which is then rectified back to DC
A DC to AC inverter first chops the DC input to AC which is run through a transformer to produce the required AC voltage. (very simplified)
Most common inverters operate at 50-60 Hz, buck converters, boost converters, and buck-boost converters typically operate at 25 khz. which requires much smaller inductors.
BOTH methods of changing the voltage involve inductors and capacitors to change the DC to AC
A good starter read on DC to DC conversion can be found at wikipedia : buck converters, boost converters, and buck-boost converters......read all three articles for a understanding of inductance/capacitive relationship in DC to DC conversion
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DerpsyDoodler
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I REALLY DONT HAVE A HARD TIME SEEING OR READING, BUT I'LL PRESUME YOUR CAPSLOCK IS BECAUSE YOU DO. SO WHAT IS THE DIFFERENCE BETWEEN A DC GENERATOR AND AN ALTERNATOR?
A DC generator produces DC directly
An Alternator produces AC which is then rectified to DC with diodes, Most common alternators are three phase AC at a variable frequency which is directly related to the r.p.m. of the Alternator.
An AC generator produces AC directly from the coils, the frequency of the AC is directly related to the shaft speed and the number of coils on the generator.... Common AC generators are 3600 r.p.m. or 1800 r.p.m. depending on the number of coils , 2 or 4 are most common
Honda Inverter generators are a hybird.....they are 3 phase alternator (AC) which is rectified to DC at about 80 volts which is then used to power the inverter to make the AC. So they are AC converted to DC then back to AC.
The advantage is frequency output is not directly coupled to the R.P.M. of the engine.....thus the inverter generators change speed to be more effecient which a AC generator cannot do as frequency is directly related to r.p.m.
the frequency of the alternator is directly related to the speed of the engine, the frequency of the inverter is derived from the logic in the alternator. They do not need to be the same.
An Alternator produces AC which is then rectified to DC with diodes, Most common alternators are three phase AC at a variable frequency which is directly related to the r.p.m. of the Alternator.
An AC generator produces AC directly from the coils, the frequency of the AC is directly related to the shaft speed and the number of coils on the generator.... Common AC generators are 3600 r.p.m. or 1800 r.p.m. depending on the number of coils , 2 or 4 are most common
Honda Inverter generators are a hybird.....they are 3 phase alternator (AC) which is rectified to DC at about 80 volts which is then used to power the inverter to make the AC. So they are AC converted to DC then back to AC.
The advantage is frequency output is not directly coupled to the R.P.M. of the engine.....thus the inverter generators change speed to be more effecient which a AC generator cannot do as frequency is directly related to r.p.m.
the frequency of the alternator is directly related to the speed of the engine, the frequency of the inverter is derived from the logic in the alternator. They do not need to be the same.
DerpsyDoodler
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Thank you for that explanation. How does a DC generator produce DC directly?
Well, it does not produce DC directly, it does produce AC which is then mechanically rectified to DC through the brushes which reverse the connections every 1/2 rotation of the armature shaft. A DC generator does have multiple windings but only one winding is connected to the brushes at a time by the commutator bars.
Derpsy, my apologies, i dont mean to yell, sometimes it is very hard to get someone to focus on the important parts so i use caps to empathize the important points that people will read over and not understand. Electricity comes very easy to me, not so much to some people....
Derpsy, my apologies, i dont mean to yell, sometimes it is very hard to get someone to focus on the important parts so i use caps to empathize the important points that people will read over and not understand. Electricity comes very easy to me, not so much to some people....
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DerpsyDoodler
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And how is that output voltage tuned? Is the a/c voltage that's created already at the desired voltage?
DerpsyDoodler
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so if given the rotational speed of the generator, could one contract the fabrication of an appropriate (not transformer) coil that will output the desired voltage? Will the change in voltage require a change of the conversion brushes?
There are electric motor shops that specialize in rewinding motors, its not an easily done process that end users are capable of. Yes for some voltage conversions the same brush/commutator is used. Some of the very early VoltsWagon conversions used an aircraft starter/generator which used different coils wound into WWII aircraft engine starter/generators.
DerpsyDoodler
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Any idea what a shop like that might charge?
DerpsyDoodler
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thanks for your knowledge!
schmism
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Id opt for selling the unit, buying a AC unit and then useing the link in my sig for DIY AC to DC charger based on server PSU. Then it doesnt matter what kind of generator you feed the chargers with.
The New JC777
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Would that be considered square wave? Ya got ta love this forum!!
Was thinking that might be a possabilty but the computer on the generator is 24v and does all the starting/ stopping/ timed charge, voltage adjustments, delay, and fuel pump prime and operation. starts with a single switch and was hoping to keep those perks