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Search: Posts Made By: itsid
Forum: Electric Projects 08-19-2019, 08:24 PM
Replies: 29
Views: 632
Posted By itsid
yeah, I haven't re-read the old thread to check...

yeah, I haven't re-read the old thread to check what controller it was ..
and I didn't remember all the specs we've discussed over there but since it didn't matter much
I was too lazy to check :D
...
Forum: Electric Projects 08-15-2019, 08:16 PM
Replies: 29
Views: 632
Posted By itsid
Don't gt me started again on what I think about...

Don't gt me started again on what I think about "Manta" ...
I mean I don't need to remind you about what they suggested you to controll the motor with, do I?
So their claim of 72 RPV is taken with...
Forum: Electric Projects 08-15-2019, 12:03 PM
Replies: 29
Views: 632
Posted By itsid
Hm.. I thought we scratched that sometime... ...

Hm.. I thought we scratched that sometime...
Nevermind

I'll try to keep it simple...

The commutator bar (what the brushes run on)
switches the coils on the rotor so that the "upcoming" coil...
Forum: Electric Projects 08-15-2019, 05:17 AM
Replies: 29
Views: 632
Posted By itsid
the commutators are slightly biased on almost all...

the commutators are slightly biased on almost all PMDC motors,
I thought you're aware of that.

Most diagrams are even split for CW and CCW rotation.

'sid
Forum: Electric Projects 08-14-2019, 05:42 PM
Replies: 29
Views: 632
Posted By itsid
rev per volt under load is dependend on the load...

rev per volt under load is dependend on the load itself.
120 lbs rider at 7:1 and 300 lbs rider @ 5:1 makes a whole lot of a different load
So no in the end it's just some arbitrary number..
If...
Forum: Electric Projects 08-13-2019, 09:07 AM
Replies: 29
Views: 632
Posted By itsid
I think that depnends on how low your standard is...

I think that depnends on how low your standard is ;)

standard practice for an industry conform check that require battery operation
is to add a voltmeter to the system and log the volts under...
Forum: Electric Projects 08-04-2019, 07:50 AM
Replies: 29
Views: 632
Posted By itsid
sure you can measure speed with it.. "actual...

sure you can measure speed with it..
"actual speed " is a relative term tbh..
but if you know the effective circumference of the wheel* you can calculate it with the
measured wheel rpm.

and...
Forum: Electric Projects 08-02-2019, 06:49 AM
Replies: 29
Views: 632
Posted By itsid
simple.. assuming 54V (13.5V per battery) ...

simple.. assuming 54V (13.5V per battery)
dividing your results by 54 (rpm/volt to be 65.278 unloaded and 59.72 loaded)
then multiplying by 48 again to get the rated value

That's why I was...
Forum: Electric Projects 08-01-2019, 10:47 AM
Replies: 29
Views: 632
Posted By itsid
you sure? Since the usual 12V battery has a...

you sure?

Since the usual 12V battery has a 13.5V output when fully loaded
we talk 54V fresh and 48V semi depleted..

that'd be 3133 rpm unloaded and 2866 rpm loaded [@48V]
So my guess is, you...
Forum: Electric Projects 07-09-2019, 08:35 PM
Replies: 29
Views: 632
Posted By itsid
the meter itself draws maybe 200mA (I'd say...

the meter itself draws maybe 200mA (I'd say closer to 100 tbh)
the proximity sensor doesn't need 300mA at all
(maybe for 300kHz but that'd equate to 18 million rpms and I haven't seen anything...
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