Saturday, May 21, 2011

Re: [Electric Boats] Efficiency of Torqeedo motors at low power levels

 

Ah, I see that chart now. Wow, at the 'maximize,' 50 watt setting of the 801, the overall efficiency is only about 15%. No way I'm going to get real long distance running at the lower wattage rates...

Thanks,

Neil

--- In electricboats@yahoogroups.com, "Steve" <sstuller@...> wrote:
>
> The efficiency chart on their website shows that the motors don't reach full efficiency until the input power reaches 25- 30% of the maximum input power. Smaller motors are more efficient at lower power inputs because of this characteristic. You want to choose a motor that is operating in the middle of the input power curve with your average load not your peak load. Otherwise you run your batteries down to quickly. Thanks. Steve S.

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