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Forum: Brushless Motor Construction

04-24-2022, 01:19 PM

Replies: 7

Motor constant Km

Views: 2,793

Posted By ron_van_sommeren

You could use a milliOhm meter, but they tend to...

You could use a milliOhm meter, but they tend to be expensive. Fortunately there are other methods for determining motor winding resistance (http://bavaria-direct.co.za/constants/#Rm) (Rm):...

Forum: Brushless Motor Construction

04-24-2022, 12:07 PM

Replies: 7

Motor constant Km

Views: 2,793

Posted By ron_van_sommeren

A.k.a. Lucien Miller www.innov8tivedesigns.com...

A.k.a. Lucien Miller
www.innov8tivedesigns.com (http://www.innov8tivedesigns.com)
&
www.cobramotorsusa.com (https://www.cobramotorsusa.com/)

Lucien knows what he is talking about, good tech...

Forum: Brushless Motor Construction

04-23-2022, 04:39 PM

Replies: 7

Motor constant Km

Views: 2,793

Posted By ron_van_sommeren

A bit more background information. ...

A bit more background information.

IC-engines and e-motors have fundamentally different behaviour.
An ic-engine tries to keep a constant torque.
As a result, as propeller load goes up, rpm must...

Forum: Brushless Motor Construction

04-23-2022, 04:39 PM

Replies: 7

Motor constant Km

Views: 2,793

Posted By ron_van_sommeren

An e-traction forum: www.endless-sphere.com ...

An e-traction forum:
www.endless-sphere.com

Wheels need high torque, and therefore high current (torque = current × Kt = current / Kv, in SI units) at zero/low rpm.
Whereas propellers don't...

Forum: Brushless Motor Construction

04-22-2022, 11:55 AM

Replies: 7

Motor constant Km

Views: 2,793

Posted By ron_van_sommeren

A dear, an EE :D I've never seen Km...

A dear, an EE :D

I've never seen Km specified in RC land, not even the torque konstant Kt (= 1/Kv, conversion in SI units,...

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