RC-Monster Forums - View Single Post

BrianG · 09.22.2008, 02:57 PM

Is the smell simply "that new motor" smell? Even when not new, the varnish does have a distinctive odor.

Coil windings are so short that they have very little DC resistance, so getting a reading with an ohmmeter is all but impossible. However, you could build a simple oscillator (555 timer based) running at ~20kHz. Add a little "current amplifier" to the output (1A max), and hook each motor lead to it with a precision 1ohm resistor in series. The voltage drop on the resistor should be equal on all phases.

	(#6)
BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	09.22.2008, 02:57 PM Is the smell simply "that new motor" smell? Even when not new, the varnish does have a distinctive odor. Coil windings are so short that they have very little DC resistance, so getting a reading with an ohmmeter is all but impossible. However, you could build a simple oscillator (555 timer based) running at ~20kHz. Add a little "current amplifier" to the output (1A max), and hook each motor lead to it with a precision 1ohm resistor in series. The voltage drop on the resistor should be equal on all phases.