Hacker motor

B

bionicon

1 kW
Joined
Jun 28, 2015
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335
Location
Belgium
Can somebody explain this datasheet try to figure out how much torque this motor can give?

Nennspannung / nominal Volatge 50 Volt
Leerlaufstrom / No load current 3,6 A
spez. Drehzahl / Spped constant 36 min-1
Leerlaufdrehzahl / No load speed 1800 min-1
Ri incl. Steller / Resistance incl ESC 0,0290 Ohm
Max.Wirkungsgrad / max. efficiency 0,91
Strom bei eta_max / Current on eta_max 78,78 A
Drehzahl eta_max / RPM on eta_max 1721
Drehmomentkonst. / Torque constant 26,48 NcmA-1
Anhaltemoment / Stall torque 45661,8 Ncm
Gewicht / Weight 3310 g
Drehm. eta_max / Torque on eta_max 2086,5 Ncm
I_max_theoretisch / Max. current theoretic 1724,1 A
 
bionicon said:
Can somebody explain this datasheet try to figure out how much torque this motor can give?
Click to expand...

Well, it doesn't sound like much, since it's all scaled in newton-centimeters, rather than newton-meters. But I don't know how long it could sustain the "stall torque" without melting (since this is at a complete stopped motor condition). And without knowing what the "eta_max torque" actually means, I don't know how long that can be sustained, or under what conditions.

Says that continous torque would be 26.48 newton centimeters, which is 0.2648 newton-meters. THat's less than 1/40th of the torque of the default wimpy setup in the Grin simulator, at 20MPH, of 8.5Nm.

Says stall torque is 45661.8 newton centimeters, which is 456.618 newton meters.

I don't know what the "eta_max" torque means, but it comes out to 2086.5 newton centimeters, which is 20.865 newton meters. That's less than half the torque at startup from a stop (45.1Nm) for the default stuff in https://www.ebikes.ca/tools/simulator.html , an HSR3548 26" wheel, typical bike, 26v battery, 20A controller (so a fairly wimpy setup).


This may be more than good enough for your purposes, but we have no idea, since you haven't said what those are. ;)


Drehmomentkonst. / Torque constant 26,48 NcmA-1
Anhaltemoment / Stall torque 45661,8 Ncm
Drehm. eta_max / Torque on eta_max 2086,5 Ncm
Click to expand...
 
thx for the explanation, I want to use it for a light bicycle as a middrive ,when i gear it down it should be ok i think. The bike is arround 35kg and 4 to 1 downgearing .
 
If I understand it well it will give 0.26 nm /amp, so if you feed it 150amps it will do 39nm and if i multiply by 4(gearing)it will give 156nm at the rear wheel, thats seems nice :eek:
 
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