Search: Posts Made By: MustangMan
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02-06-2010, 04:06 AM
Replies: 48
Views: 56,596
Posted By MustangMan

Commercial/Industrial 3-phase motors are indeed a...

Commercial/Industrial 3-phase motors are indeed a bit different in detail from our little motors but operate using the same general principles. Smaller 3-phase motors use squirrel cage rotors just...
02-06-2010, 01:19 AM
Replies: 48
Views: 56,596
Posted By MustangMan

In the simplest sense Rm is the DC resistance of...

In the simplest sense Rm is the DC resistance of the windings between any two phase leads. Because it is substantially less than 1 ohm in any of our model motors it's a little difficult to measure...
02-04-2010, 06:35 PM
Replies: 48
Views: 56,596
Posted By MustangMan

Our electric power systems are VERY voltage...

Our electric power systems are VERY voltage sensitive due to the nature of the operation of propellers. Since the power necessary to turn a propeller rises as the QUBE of the RPM, and a motor tries...
02-04-2010, 03:12 AM
Replies: 48
Views: 56,596
Posted By MustangMan

Very often the specification numbers, especially...

Very often the specification numbers, especially electrical parameters, on HobbyKing motor offerings are quite far off. Sometimes they look like they copied most of the specs from another motor and...
10-13-2009, 02:38 AM
Replies: 48
Views: 56,596
Posted By MustangMan

Well, we've managed to drag this thread WAY OFF...

Well, we've managed to drag this thread WAY OFF TOPIC! Interesting stuff though.
10-13-2009, 02:09 AM
Replies: 48
Views: 56,596
Posted By MustangMan

Sounds like fun stuff. I'm surprised the...

Sounds like fun stuff.

I'm surprised the contact resistance was that high. At 800 Amps that would mean a voltage drop of 40 to 80 mV. resulting in 32 to 64 watts of heat being generating in the...
10-12-2009, 09:17 PM
Replies: 48
Views: 56,596
Posted By MustangMan

DANG! You must be nearly as old as ME!:Q

DANG! You must be nearly as old as ME!:Q
10-12-2009, 09:01 PM
Replies: 48
Views: 56,596
Posted By MustangMan

One, hopefully minor, aspect of these motor...

One, hopefully minor, aspect of these motor measurements I'd like to point out is that, when making measurements like this, best practice is to do what's called a four-wire measurement. A four-wire...
Showing results 1 to 8 of 8


 
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