On 07/05/14 14:46, semicolonsutra wrote:
>
>
> I'm running the ME0913 on a 38 foot 6ton wooden sailboat boat based on
> the Thunderstruck kit with a 2:1 reduction. At 4.5 knots hull speed,
> in calm waters, the cycle analyst is reporting 2.1kw at full throttle
> or around 40-43 amps at 48volts (SevCon Gen4 controller). The
> tachometer reads about 980 RPM at the driveshaft. The motor does not
> get hot at all even after running for an hour--it is however warm to
> the touch of palm. The Fluke 325 clamp meter reads around 90-92 amps
> when measuring the input to the controller on the (+) terminal.
>
>
> This seems like a pretty big difference between the Fluke and the CA
> (40 vs 90amps ), no? Any suggesti ons on what might be going on here?
>
>
Are you measuring the same thing ?
Where's the Cycle Analyst's shunt ?. Measure the voltage across the
shunt and do the math. You might have a calibration error.
--
Matthew Geier,
Systems Administrator, Australian Centre for Field Robotics
+61 2 9351 8149
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