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KONDOR XL 20-37 motor max cell count

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KONDOR XL 20-37 motor max cell count

Old 06-20-2023, 05:28 PM
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rcfs
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Default KONDOR XL 20-37 motor max cell count

Does anyone know how many lipo cells a KONDOR XL 20-37 motor can handle safely? Thanks
Old 06-29-2023, 12:28 PM
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ron_van_sommeren
 
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Motors, unlike ESCs!, can handle any voltage in RC land, as long as current & power drawn and rpm don't get too high.
The wire insulation/laquer/resin can withstand several hundred volt.

So the max.voltage depends on the prop: the higher the prop load and/or on Kv (→higher current), the lower the max. operating voltage (→lower current).
Therefore: what prop would you want to use, what velocity konstant Kv? With those numbers you can calculate rpm, current and power drawn.
Using e.g.
www.ecalc.ch
or
www.rcgroups.com/forums/showthread.php?736782-Scorpion-Calculator

Voltage/prop combination tables are merely suggestions.
To keep current and power drawn in bounds, the highest voltages should go with the low-load prop, the high-load props go with the low voltage.
All this because current drawn goes up with pitch, voltage² Kv³ and diameter⁴

Although velocity_konstant_Kv has a massively disprportional effect on current (squared) and power (cubed) drawn, Kv, measured/expressed in rpm/volt, says nothing about a motor's max. current and max.power ratings.
Both the motor in your electric toothbrush and the motor in a 1:1 train can have th same Kv.

*****

A very long clearance sale, originally 200+$, versatile, high quality, now literally peanuts:
Hyperion Emeter II wattmeter with local&remote logging, optical&electrical rpm meters, servo tester - RCG

Without a watt/volt/current/multi-meter you are in the dark.
Until something starts to glow

Last edited by ron_van_sommeren; 06-30-2023 at 11:07 AM.
Old 06-30-2023, 10:26 AM
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ron_van_sommeren
 
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So the max.voltage depends on the prop: the higher the prop load and/or on Kv (→higher current), the lower the max. operating voltage (→lower current).
Therefore: what prop would you want to use, what velocity konstant Kv? With those numbers you can calculate rpm, current and power drawn.
Using e.g.
www.ecalc.ch
or
www.rcgroups.com/forums/showthread.php?736782-Scorpion-Calculator



Prettig weekend Ron
• Without a watt-meter you're in the dark ... until something starts to glow •
E-flight calculatorswatt-metersdiy motor tips&tricksCumulus MFC

Last edited by ron_van_sommeren; 06-30-2023 at 11:05 AM.

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