On 23 Oct 2006 at 15:52, Doug McCorkle wrote:
seem to get only about half
the speed as previously.
That's normal. It's because the Alltrax doesn't do field weakening.
Essentially, you lose the E15's top 4 speeds, but get infinite
steps between
the bottom four.
In this situation, the top ground speed you can attain isn't an
indication of
whether the unit can produce its rated power. Nor is steady-state
current. It
would be entirely normal to measure only 16-20 amps at full
throttle if the
motor were lightly loaded.
Saying that this indicates something wrong is like saying that a
400 watt
Macintosh stereo amplifier is broken because it produces less
volume at the
halfway knob setting than a cheap Radio Shack compact system at the
same knob setting. In both cases - volume control or throttle
control - the
steady-state output tells you nothing about whether the controller
is able to
produce its rated output.
You would need to measure full-load current to determine whether the
controller is producing full output. Try measuring the current while
acclerating up a hill. Even that may not be enough load for a full-
load test.
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