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Forum: Power Systems
04-15-2009, 12:09 PM
Replies: 64
Views: 17,957
Posted By ron_van_sommeren

Better controller cooling: www.mgm-compro.com ...

Better controller cooling:
www.mgm-compro.com
-> tech.info

Vriendelijke groeten ;) Ron
Forum: Power Systems
04-14-2009, 10:37 PM
Replies: 64
Views: 17,957
Posted By ron_van_sommeren

YES!!! When paralleling packs, they MUST have the...

YES!!! When paralleling packs, they MUST have the same cell count, same make and type, same capacity, same history (charging and usage). Always charge them in parallel too.

Automatic wiring...
Forum: Power Systems
04-14-2009, 10:32 PM
Replies: 64
Views: 17,957
Posted By ron_van_sommeren

Depends on the number of calculations per second...

Depends on the number of calculations per second the ESC can do: type of microprocessor/microcontroller used and its clock-frequency. To the controller, a 14magnetpole motor running at 30krpm is...
Forum: Power Systems
04-14-2009, 10:12 PM
Replies: 64
Views: 17,957
Posted By ron_van_sommeren

Nope, BEMF does not come into play here. But, as...

Nope, BEMF does not come into play here. But, as RPM increases, both hysteris losses (http://en.wikipedia.org/wiki/Hysteresis#Magnetic_hysteresis) (proportional to RPM) and eddy current...
Forum: Power Systems
04-14-2009, 09:51 PM
Replies: 64
Views: 17,957
Posted By ron_van_sommeren

My remark was just a general remark about...

My remark was just a general remark about influence of changes in voltage only. Lots of people add an extra cell, not knowing that current goes up squared. And then they fry motor and/or controller.
Forum: Power Systems
04-14-2009, 01:45 AM
Replies: 64
Views: 17,957
Posted By ron_van_sommeren

A motor cannot be viewed/modelled as a simple...

A motor cannot be viewed/modelled as a simple resistor where current goes up linearly with voltage. RPM goes up linearly with voltage (rpm = Kv x voltage), motorcurrent wants to go up squared with...
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