Re: [Electric Boats] Re: Why no high voltage?

 

This group seems focused on low voltage golf cart type systems but for applications like ours the high voltage industrial motors seem MUCH more viable. You and I would seem to be on the same page.

On Mar 5, 2012, at 6:21 AM, "marcdrachten" <mevanderkuur@gmail.com> wrote:

 

Low cost: industrial high voltage (110v/220v) asynchronous motors are far cheaper compared to DC engines with same power ratings. For controllers the same applies (at least what I can find so far)

Power: HV motors come in a wide power range starting below 1kW. You can use an inverter to get power from batteries starting at 12v batterie supply and everything up as you like. The inverter can also double as a charger.

Weight and cost is not much of an issue indeed, but 24v @ 100 amps requires a bigger cable compared to 110v @ 22 amps or 220v @ 11 amps, making installation easier. If I'm not mistaken, length of cables could also be longer offering more flexibility. But I'm not entirely sure about that.

My assumption is that durability is far higher since all off the shelf industrial grade parts can be used.

The only disadvantage is that these motors are slightly less efficient, but doesn't price, durability and flexibility compensate for this?

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