Old 07-22-09, 12:28 PM
Join Date: Jul 2009
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how to measure the efficiency of bike motor???


I have got, I think a 600watt electric bike which has four batteries which in total uses 50v
but i would like to test the efficiency of the motor.

I know its a 600watt motor and it uses 50v but i need to know what amps ie the current it is drawing from the battery.

I was thinking a multi-reader would be able to do this but it only goes up to 10 amps and i think my system would use a little bit more so would not work or would blow the reader ie

52v - 600watt = 11.5 amps

not sure if i used it at half speed ie 300watt or there is a better way to do this

hope your can advise

many thanks

puddingbag is offline