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Turnigy 63-64-B 230kv Outrunner

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Turnigy 63-64-B 230kv Outrunner

Old 06-10-2011, 05:00 AM
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Default Turnigy 63-64-B 230kv Outrunner

Hello,

I am wondering if anyone knowshere knowsabout brushless motors of this size.


www.hobbyking.com/hobbyking/store/uh_viewItem.asp


The specs say its RPM is 230 per volt. Im a simpleton, does that mean with 3.7volts the RPM will be about 851?

Also, how do brushless speed controllers control the speed? Is it by controlling RPM or amparage? To say it differently, could the speed control be set for 150RPM and draw as much amperage as required to run at 150 RPM?

And lastly can a speed control limit the amount of amperage drawn on the batteries?

Thanks!

Oh last is there such a speed controller for such low voltages (and RPM)?
Old 06-28-2011, 10:26 AM
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Default RE: Turnigy 63-64-B 230kv Outrunner

To take them in order:

The specs say its RPM is 230 per volt. Im a simpleton, does that mean with 3.7volts the RPM will be about 851? Yes!
Also, how do brushless speed controllers control the speed? Is it by controlling RPM or amparage? To say it differently, could the speed control be set for 150RPM and draw as much amperage as required to run at 150 RPM? There are different types of speed controllers but they all work by increasing or decreasing the average voltage applied to each winding over a given time (typically milliseconds).

And lastly can a speed control limit the amount of amperage drawn on the batteries? Well, they do, since they control the voltage applied across a given, but somewhat variable load; the windings. They also sometimes have thermal cuouts inside in case the overheat. The cells will also "limit" the amperage they'll deliver but you don't want that to happen. Thanks!

Oh last is there such a speed controller for such low voltages (and RPM)? The motor you referenced isn't really a low Kv for that size. It'll probably need a 100A+ ESC and 6+ cells to deliver optimal power for its size.

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