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Testing Machine Wound Motors on a dynamometer
Nov 07, 2006
These were the tests that I made with my 1/12 (6
cells) scale motors. I can tell you that the results on the P2K are a bit
different from what's printed on the label. The power is similar 116.8 compared
with 120, but the RPM is 5.000 lower than declared. This can be due to the fact
that I cut the (thanks for pointing the mistake, Big Jim) leading edge (right
edge) of the
brushes.
The Rage has more RPM but lacks some power and
efficiency. The Speed Gems gains in every area. In fact I've noticed how
smooth and easy is to drive the 1/12 with that motor. When I want to make the
best lap, that's the motor I use.
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Efficiency |
Power |
RPM |
Current draw |
Torque |
| at Max Efficiency |
P2K Pro |
77.2 % |
75 W |
19344 |
13.0 A |
35.45 Nmm |
| Reedy Rage Stock |
69.5 % |
73 W |
20862 |
14.5 A |
33.54 Nmm |
|
Speed Gems Quartz |
83.2 % |
75 W |
22024 |
12.4 A |
33.21 Nmm |
| at Max Power |
P2K Pro |
56.0 % |
117 W |
11964 |
31.7 A |
89.17 Nmm |
| Reedy Rage Stock |
51.9 % |
101 W |
13461 |
29.8 A |
71.94 Nmm |
|
Speed Gems Quartz |
61.8 % |
142 W |
14244 |
37.5 A |
97.23 Nmm |
| at Max RPM |
P2K Pro |
|
74 W |
25562 |
3.7 A |
|
| Reedy Rage Stock |
|
64 W |
28422 |
4.9A |
|
| Speed Gems Quartz |
|
90 W |
26721 |
2.4 A |
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Machine Wound Motors
Orion Orbital Pro 2 BB 12x3
|
Orion Pro 2 BB 12x3 |
Efficiency |
Power |
RPM |
Current draw |
Torque |
| at Max Efficiency |
run 1 |
75.6 % |
110 W |
29.409 |
20.9 A |
34.51 Nmm |
| run 2 |
74.8 % |
96 W |
30.608 |
17.9 A |
28.59
Nmm |
|
run 3 |
75.7% |
99 W |
30.631 |
18.2 A |
29.32 Nmm |
| at Max Power |
run 1 |
58.4 % |
166 W |
18.732 |
49.7 A |
81.46 Nmm |
| run 2 |
57.6 % |
165 W |
18.432 |
50.2 A |
81.93 Nmm |
|
run 3 |
62.0 % |
165
W |
20.853 |
44.3 A |
71.91 Nmm |
| at Max RPM |
run 1 |
|
105 W |
37.068 |
5.2 A |
|
| run 2 |
|
105 W |
37.055 |
5.1 A |
|
| run 3 |
|
105 W |
37.108 |
5.1 A |
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What I really like in these machine wounds is the fact
that several readings on the dyno give very similar results, unlike the hot hand wounds
that change a lot from pull to pull.
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