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[Pdelcast]

Originally Posted by ta_man

Umm... Not Quite...

The Hobbywing 1/8th scale XERUN G2 rotors also have separate magnets at the back of the rotor to assure accurate timing. Pic on their web site shows that. Though they don't discuss details, a 4 segment ring is clearly visible at the back of, and separated from, the main rotor magnets. It is not clear from the pic whether they also have a flux shield between the magnets for the sensors and the main magnets.

I was kind of wondering who came up with the idea first, Castle or HobbyWing, since they are both being released so close together (though one can already buy the HobbyWing). Their pic was on their web site before your info was publicized here.

Interesting. The designs are different for sure.

It's actually a common design outside of RC-- but more expensive to manufacture.

I guess we were both working on it. Understood the same issues.

[Pdelcast]

Originally Posted by Pdelcast

Interesting. The designs are different for sure.

It's actually a common design outside of RC-- but more expensive to manufacture.

I guess we were both working on it. Understood the same issues.

Well, there are big differences between the Castle and the Hobbywing design.

I won't go into detail, because the differences are the "special sauce" -- but one big difference I can talk about is QuietSense.

Castle shields the sensor assembly from influence from the stator end-winding fields. This prevents high power fields from skewing the field being detected by the sensor, and prevents noise from causing invalid sensor outputs.