Recent content by bike4life

> The motor hums. > The shaft is free and not clogged. > I spin the motor by hand and by drill so even if the start winding is bad it should still spin up.... > Despite that, the motor continues to hum and does not start spinning. please help thx.

i have this volimart kit ebike. Has one of these throttles. The ebike will not turn on or move, the controller throttle led is last bar - orange or sometimes nothing. I measure 54v at the battery. I could not get the bike to run or the throttle display to turn the bike. I was able to get...

the bms reads 0 volts. i cut off the top lid part of the pack so i could manually charge the battery pack since its 13s, i measured 40volts on the pack so i placed a lead from the - and + and let it charge at around 2c for 20 minutes till it reached 44 volts. It still didnt recognize the bms and...

i thought only motors, capcitors, affect power factor, i thought SMPS's and fancy silicon is exempt.

they are =

i purchased a 1000W SMPS 120v AC --> 36V DC supply. This is for charging my ebike. I wired it up against the battery for charging and the following readings are done with a ac/dc clamp meter. I am measuring 12 amps on the input and 27 amps on the output. 12 x 120 = 1440w. 36 x 27 = 1000w...

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i dont get why you guys keep on saying you need 3000w for 40mph, why this graph shows entirely different. I

there is no AC switch. The ac switch is plugging and unplugging the generator. I promise there isnt an AC switch lol :). Basically there are 2 siwtches. One is series to the wheel / controller which takes the DC. The other is series against the boost converter which takes DC. "As for the law...

DC. why does it matter. who cares? the switch sees around at least 20 amps constant, and probably 50 amps peak. it seems to be doin ok.

i dont have a car so this will be my car replacement. i need the same range as a car, at ideally 60% of car speed. It needs to be 2x as fast as bicycling so it needs to be at least 30mph and 25mph is a no go, so i plan on increasing voltage > 40 volts, 12s x 3.4 lifepo4/ I dont need stealth. i...

what does 1800w give. 35mph? im happy with 35mph. 1000w is 30mph correct? its not a motorcycle its an ebike. The laws in NJ are any ebike with a 750w or less is an ebike. The cops will pick u with a engine bike but not an ebike. Is a cop gonna know i am running 1800w on a 1kw volimart i dont...

thanks. :) i see... firstly its all a custom charger. i am currently that SMPS is the equivalent of a 1000w charger, and the commercial price of that would be idk 500 when i paid 70. Somehow my SMPS supplies from alixpress dont like messing with the POT. I changed the POT on one to 40 volts and...

I forget if i alluded earlier but the reason for this is i want like 200 mile range ebike at 25+mph, which is not possible without a generator. also, a engine powered bike is illegal in my state so i had to make a hybrid. https://www.youtube.com/watch?v=Pb-GJbPhIl4 its a little slow at 25mph...

its a generic 1000w switching supply from china... The grounds are isolated. I actually ran a series system for a few seconds and had it turn an motor and it worked, so i suppose its ok. I never open and remove case ground, i simply dont wire a ground to the supply 2 prong plug and i make sure...