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Sources for large electric motor
I doubt you will find a 12VDC motor over 1HP. www.surpluscCenter.com has
2HP 24VDC motors that draw 72 amps ad full load for $200. You might also look at old automotive starter motors. Not sure of the HP but they are very popular for barstool racing in the 12V classes. -- Glenn Ashmore I'm building a 45' cutter in strip/composite. Watch my progress (or lack there of) at: http://www.rutuonline.com Shameless Commercial Division: http://www.spade-anchor-us.com "Michael" wrote in message ... Hi, I'm building a model submarine it will have a displacement of around 500kg and a length of 4m. Having worked out a rough idea as to the size of the motor required, 3hp. I'm now looking for suggestions. Sites like technobots don't stock ones large enough and so I'm struggling to find an answer. Then there is the matter of how to control the speed. Ideally I'd like proportional control. So, does anyone know where I can find a large enough motor, ideally with the electronics to control it? The onboard power will be provided for by two 12V batteries, of which the AH is still undecided. Thanks Michael |
#2
posted to rec.boats.electronics
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Sources for large electric motor
On Sat, 05 Nov 2005 17:13:13 -0500, Glenn Ashmore wrote:
I doubt you will find a 12VDC motor over 1HP. www.surpluscCenter.com has 2HP 24VDC motors that draw 72 amps ad full load for $200. You might also look at old automotive starter motors. Not sure of the HP but they are very popular for barstool racing in the 12V classes. Every car that has a starter motor in it has a 12 volt motor that has a rating way higher than a simgle horsepower...... Most car starters pull way over 100 amps when cranking the engine.... Assuming your starter draws 100 amps at 12 volts = 1200 watts. The last time I checked the horsepower was supposed to be something like 762 Watts.... I rest my case. Mind you they arn't rated for long term running... tending to overheat rather quickly! Pip |
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