Step-up to 16v or Step-down to 12v

[kirill007]

So what benefits does a 16V alternator has over a 12V alternator if they both can only supply 2400W for long periods?

[Bump4life]

So what benefits does a 16V alternator has over a 12V alternator if they both can only supply 2400W for long periods?

efficiency. and also make more theoretical power.

to make things simple,

lets say your demand is 2400 watts. 2400 wattis is V x A in dc. if you raise the voltage you decrease your amperage requirement. so if you charge at 14v youll need approx 2400/14v = 171 amps to run "2400watts" inreality after efficiency that would probably be a 2000 wat rms amp.

if you charged at 16 volts, 2400/16=150 amps. so you dont need as large of an alternator, or your alt wont be running near its max.

but higher voltage also means you have the potential to make more power.

to answer your question, the benefit is you dont need as much current. higher voltage, less current. thats why utility power runs at 13kv and 69kv etc, so they can get away with smaller wires to cut costs. cause larger amperage require larger wires.

[Robert.Stever]

So what benefits does a 16V alternator has over a 12V alternator if they both can only supply 2400W for long periods?

efficiency. and also make more theoretical power.

to make things simple,

lets say your demand is 2400 watts. 2400 wattis is V x A in dc. if you raise the voltage you decrease your amperage requirement. so if you charge at 14v youll need approx 2400/14v = 171 amps to run "2400watts" inreality after efficiency that would probably be a 2000 wat rms amp.

if you charged at 16 volts, 2400/16=150 amps. so you dont need as large of an alternator, or your alt wont be running near its max.

but higher voltage also means you have the potential to make more power.

to answer your question, the benefit is you dont need as much current. higher voltage, less current. thats why utility power runs at 13kv and 69kv etc, so they can get away with smaller wires to cut costs. cause larger amperage require larger wires.

Ohms law bro.

Also a 16v battery is being charged at 19.5v and rests at 16.8v

2400watt load

14.4v = 166 amps

19.5 = 123 amps

That's a 34.9% reduction in current. This means a lot for high current drains.

It's the reason why I'm going to a 16v setup for my Audiopipe amps.

[Kyblack76]

High volt runs soooo fucking cool.

Amps stay like warm at best on the high volt systems I've seen.

Huger voltage , less amperage with more out put.

[Bump4life]

So what benefits does a 16V alternator has over a 12V alternator if they both can only supply 2400W for long periods?

efficiency. and also make more theoretical power.

to make things simple,

lets say your demand is 2400 watts. 2400 wattis is V x A in dc. if you raise the voltage you decrease your amperage requirement. so if you charge at 14v youll need approx 2400/14v = 171 amps to run "2400watts" inreality after efficiency that would probably be a 2000 wat rms amp.

if you charged at 16 volts, 2400/16=150 amps. so you dont need as large of an alternator, or your alt wont be running near its max.

but higher voltage also means you have the potential to make more power.

to answer your question, the benefit is you dont need as much current. higher voltage, less current. thats why utility power runs at 13kv and 69kv etc, so they can get away with smaller wires to cut costs. cause larger amperage require larger wires.

Ohms law bro.

Also a 16v battery is being charged at 19.5v and rests at 16.8v

2400watt load

14.4v = 166 amps

19.5 = 123 amps

That's a 34.9% reduction in current. This means a lot for high current drains.

It's the reason why I'm going to a 16v setup for my Audiopipe amps.

thats not ohms law bro. thats the formula for power. you just did the same calculations as i did with different numbers. Power (watts) = I (current) x V (voltage).

and anyone who does a HV setup knows what they charge at. my example was for learning purposes between different voltage alterantors. not getting all nitty gritty with the specifics. not everyone here is an electrical engineer like us.

[Robert.Stever]

i love the enthusiasm and ingenuity, but a step up for it to be useful must be able to be used on 5k plus amps where people actually use higher voltage. and yes it wont be 5k continous. but even so after efficiency you are talking about needing to supply 200-300 amps for a 5k amp. thats gunna be expensive to manufacturer a reliable step up module. even then if people had the money they would just have adjustable alternators. it cost about 150 to make an alternator any voltage you want. and buy a step down for your car which consumes much less than an amplifier.

i wouldnt waste your time trying to market that, that market isnt big enough to create a large enough demand for the idea to be profitable.

That's why I'm using SEPIC topology. I'm getting into the 95% range with 12v in and 18.5v out under a 50 amp load, the greater the input/output differential the higher the efficiency. The same supply can be used in Buck mode, just swap the diode and the inductor around.

So would a step down that is 90-95% efficient be something that members here would buy?

efficiency is great, but the components still need to handle a 500 amp continous load at a minimum IMO for it to be reliable in the HOT summer

Duty Cycle is at 50% under full load, these igfets can drain 500a pulsed per FET, with 10 that is 5000a I wouldn't advise it could run at 5000a all day however with proper cooling I can get it to several minutes before the junction temperature of the FET package meet's thermal runaway. With Tina-TI the efficiency is still predicted to be above 90%, that's 950 watts of heat that I will need to dissipate somehow for continuous operation with a 5000a load. I can build it (done it before too), but it would cost more than an alternator.

[Broke_Audio_Addict]

You're an electrical engineer and you run audiopipe?

Hmmmm.

[Robert.Stever]

So what benefits does a 16V alternator has over a 12V alternator if they both can only supply 2400W for long periods?

efficiency. and also make more theoretical power.

to make things simple,

lets say your demand is 2400 watts. 2400 wattis is V x A in dc. if you raise the voltage you decrease your amperage requirement. so if you charge at 14v youll need approx 2400/14v = 171 amps to run "2400watts" inreality after efficiency that would probably be a 2000 wat rms amp.

if you charged at 16 volts, 2400/16=150 amps. so you dont need as large of an alternator, or your alt wont be running near its max.

but higher voltage also means you have the potential to make more power.

to answer your question, the benefit is you dont need as much current. higher voltage, less current. thats why utility power runs at 13kv and 69kv etc, so they can get away with smaller wires to cut costs. cause larger amperage require larger wires.

Ohms law bro.

Also a 16v battery is being charged at 19.5v and rests at 16.8v

2400watt load

14.4v = 166 amps

19.5 = 123 amps

That's a 34.9% reduction in current. This means a lot for high current drains.

It's the reason why I'm going to a 16v setup for my Audiopipe amps.

thats not ohms law bro. thats the formula for power. you just did the same calculations as i did with different numbers. Power (watts) = I (current) x V (voltage).

Ohm's law states that the current through a conductor between two points is directly proportional to the potential difference across the two points. Introducing the constant of proportionality, the resistance, one arrives at the usual mathematical equation that describes this relationship

I = V/R

Yes I did use the "same" calculations, however a 5.1v difference is correct whereas your 2 volt difference is not correct.

[Bump4life]

High volt runs soooo fucking cool.

Amps stay like warm at best on the high volt systems I've seen.

Huger voltage , less amperage with more out put.

its actually not less amperage with more output. its less amperage same output.

[Robert.Stever]

You're an electrical engineer and you run audiopipe?

Hmmmm.

I can't build an amplifier cheaper than them.

Edit: typo