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Old 10th April 2009, 04:02 AM   #1
star882 is offline star882  United States
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Default amplifier for hybrid car?

Has anyone designed a car amplifier that runs from the high voltage system of a hybrid car? I'm thinking designing the power supply for it would be almost exactly like designing a power supply for a home amp. In fact, many engineers have run unmodified universal input power supplies from the high voltage system of a Prius, meaning an off-the-shelf power supply can be used!

The obvious benefits would be greater power available (great for those building loud car stereos!) as well as higher efficiency due to lower currents needed. The obvious downside is that more care would be needed when connecting the amp, but it really isn't any different from wiring home AC power.
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Old 10th April 2009, 07:09 AM   #2
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what's the voltage does the hybrid car runs on? 24V? 48V?
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Old 10th April 2009, 07:45 AM   #3
luka is offline luka  Slovenia
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every car has its own setup, seen 100v+ cars too. there you would need only full bridge D amp[output stage] and you would have several kw

But I wouldn't do that, batterys are not that good to have so many large consumers to power
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Old 10th April 2009, 02:01 PM   #4
star882 is offline star882  United States
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Quote:
Originally posted by calvinhpk
what's the voltage does the hybrid car runs on? 24V? 48V?
It's 200v for a Prius, or right between the peak voltage of 120v AC and 240v AC. Thus, a universal input power supply can be used.
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every car has its own setup, seen 100v+ cars too. there you would need only full bridge D amp[output stage] and you would have several kw

But I wouldn't do that, batterys are not that good to have so many large consumers to power
Some have run several kW of loads from a Prius:
http://priups.com/riddle/answer-1.htm
And universal input power supplies will run from the electrical system of a Prius:
http://priups.com/misc/bonus-large.htm
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Old 10th April 2009, 03:28 PM   #5
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Default What about

How about an Amplifier that runs off of petrol?


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Old 11th April 2009, 10:45 PM   #6
jol50 is offline jol50  United States
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I tested the amp on that alpine pl7 or whatever its called box with that tymphany LAT driver in it. It has +75v rail only and does 500rms it says, class D. The output section is a bang & olufson. I wonder if it is an icepower amp, I don't know.
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Old 29th April 2009, 03:56 AM   #7
ke4mcl is offline ke4mcl  United States
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dont think its a wise idea to tap off the main battery pack. bass transients might actually trick the car into thinking the batteries are lower than they actually are and cause the engine to sit there and start/stop trying to recharge.

id go with a class D amp or tripath based amp that has little draw and connect to the small 12v battery.
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Old 29th April 2009, 06:11 AM   #8
luka is offline luka  Slovenia
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That is not that true, you can have taken samples of battry voltage, and if say 10 samples over 10s say the same, then you could say battery is empty, I don't think it would be a problem in this case
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Old 24th May 2009, 04:50 AM   #9
WSJ is offline WSJ  United States
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Default POWER YOUR POWER AMP IN A HRBRID CAR

My Electric Car is equipped with a DC to DC Converter that has an input range of 120 350 VDC (http://www.powerconversion.com/assets/mp_1227738018.pdf), the output is over 40 A at 14 V.
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