3 Phase

Wind and water power probably use deep cell batteries. I know they last longer but are they harder to maintain or rebuild? Or are their different types of deep cell batteries?

Offered by Jon.

How does one go about rewinding a 3 phase motor to use with low speed wind power? I had it on my list to order but haven't done it yet. Just last week I found a salvage place that sells these motors for $.20/lb. I looked at a couple that must weight 150-200 lb. or more (440 volt). Assuming a primitive environment with minimal to no controls, if one used this approach in a stand alone mode for hydroelectric power, and floating debris partly blocks the screen on the inlet pipe to one's 3 phase AC motor turned generator so that the speed drops to half of the original speed, then one would expect to measure about 30 cycles at 55 volts with light bulb brown out observable at the time. Now if this generator were then synchronized with another 60 cycle stable source of power, and connected to it, then it would begin to act like a motor, and possibly pump water or burn up because it wants to stay at the 1800 RPM to sync with 60 cycle source. To properly connect a free running AC generator to a stable 60 cycle source of power one would need to get it going slightly faster than it's sync speed. This is so it can sync up and produce contributive power.

Offered by Mike.

You can produce AC current using a 3 phase asynchronous induction motor in conjunction with water wheels. You must use proper sized capacitors (according to motor size). You will not be able to connect your load until the capacitors are saturated by the residual current created by the rotor. The beauty of these applications is that you can produce a useable 50 or 60 cycle AC current as well as charge battery banks simultaneously.

Offered by Jay.