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Sources for large electric motor
Many DC permanent magnet motors are avialable in the market, biggest
advantage is controlable speed. Go in search and look for "permanent magnet DC motor manufacturer" and you will find tons of link in there. Horse power is variable from 0 to 20 or more, its upto you to decide what horse power you are lookimg. With your kind of project I would think a less then 1 horspower is enough provided you are using gear to reduce the RPM for propeller shaft. If you are looking some thing cheap go on ebay and type "permanent magnet DC motor" and you can find many under $100. Remember you need dc motor driver device to control the speed, so do some research on internet before buying any dc motor. Another suggestion about batteries, look for deep cycle batteries cauz it last longer and built to stand for charge and discharge more oftenly as compare to ordinary auto battery. "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 |
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