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Old 04-01-2004, 09:49 PM   #1
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Default Inductance and or resistance

Do guys meter your arms? What kinda numbers should i see from a good arm? stock or mod (depending on turn in mod motor) whats good for what turn motor?
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Old 04-03-2004, 10:11 PM   #2
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so i take it nobody has measured anything like that??
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Old 04-04-2004, 06:40 AM   #3
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Quote:
Originally posted by Brandon R
so i take it nobody has measured anything like that??
yup! but serious racer's do test motors for there performance, the lamination of the armature and its lenght, the strenght of the magnets and its clearance to the arm and most important on how they wound the wire around the arm. the efficiency and power of the motor should be balance to attain its best performance! i also wind my own armature, using mabuchi sock armature but the com cant handle the heat and wear but its fast and powerful!
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Old 04-04-2004, 11:19 AM   #4
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Any 1 of these factors can affect Inductance:

-size of wire
-total length of wire
-single, double, triple etc
-type of lamination blanks
-what's been done to the laminations (eg drilling, truing)
-type of stacking of those blanks


Theory says lower inductance is "better" however that's only
comparing between two identical arms from the same model
of motor from the same manufacturer.

Comparing inductance between 2 different model arms
don't make any meaningful sense.
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Old 04-04-2004, 11:36 AM   #5
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WC- That why I clearly stated depending on Stock or Mod or turns. Comparing the numbers between the same type arm make alot of sence. Maybe comparing a trininty 12 double to a trinity 12 double flat wire or trinity stock to a orion stock etc etc etc...I guess im way to technical in the small parts. But the things i look at equil mega hp...i take it yall dont match mags either? Im talkin within 10 points off
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Old 04-04-2004, 01:15 PM   #6
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To a degree, checking inductance on modified arms, is kinda pointless, since they are handwound....they should be nearly idenctical, assuming all things equal....

However, checking stock and 19t arms can be worth it, but I would only did it at a big race.....for club level racing, its not really worth the time....

The only way to correctly check is with an LCR meter.....multimeters or voltmeters won't work correctly. You can buy a sweet LCR meter for about $100....

Later EddieO
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Old 04-04-2004, 02:04 PM   #7
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yeah i got all the tools....mag zapper, every kinda meter you could think of etc etc etc etc
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Old 04-04-2004, 04:51 PM   #8
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Why not just chuck it on BJ's dyno??
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Old 04-04-2004, 06:03 PM   #9
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LOL @ dynos
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