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  1. bike4life

    single phase induction motor hums and does not start when shaft is spun.

    > 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.
  2. bike4life

    ok folks here is the hybrid ebike.

    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...
  3. bike4life

    ok folks here is the hybrid ebike.

    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...
  4. bike4life

    SMPS for charging circuit readings wrong?

    i thought only motors, capcitors, affect power factor, i thought SMPS's and fancy silicon is exempt.
  5. bike4life

    SMPS for charging circuit readings wrong?

    they are =
  6. bike4life

    SMPS for charging circuit readings wrong?

    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...
  7. bike4life

    ok folks here is the hybrid ebike.

    title
  8. bike4life

    ok folks here is the hybrid ebike.

    i dont get why you guys keep on saying you need 3000w for 40mph, why this graph shows entirely different. I
  9. bike4life

    ok folks here is the hybrid ebike.

    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...
  10. bike4life

    ok folks here is the hybrid ebike.

    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.
  11. bike4life

    ok folks here is the hybrid ebike.

    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...
  12. bike4life

    ok folks here is the hybrid ebike.

    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...
  13. bike4life

    ok folks here is the hybrid ebike.

    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...
  14. bike4life

    ok folks here is the hybrid ebike.

    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...
  15. bike4life

    is series 2x switchingmode power supplies safe for charging at 1C

    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...
  16. bike4life

    is series 2x switchingmode power supplies safe for charging at 1C

    i have a 36v 1000w supply i would like to series with another 36v 1000w supply of the same model to yeild 72v 2000w... anything i should know. does series SMPS work that well and wont damage the supplies that much. thx
  17. bike4life

    float charging lifepo4

    doesnt matter if you think its ridicouous although my boost converter appears to be 95% efficient since i am stepping up only 15% voltage. you drop efficiency with a larger stepup. I do want to go faster so i need another pack in series.
  18. bike4life

    float charging lifepo4

    currently i have 1 12s lifepo4 pack on the trailer and a 2300w start / 1800w run generator and a 1500w boost converter and a 1000w switchmode supply. I am currently limited by the 1000w switchmode so i cant dump more than 1000w of power. I currently did a brief 1/2 mile test before the...
  19. bike4life

    float charging lifepo4

    why what
  20. bike4life

    float charging lifepo4

    some quick math shows it will cost 50 cents per hour to run my high efficiency generator. 6 gallons per hour. 3.00 gas / 6 = 50 cents. I am okay with paying 50 cents an hour to go 27mph, to go infinite range. Mind you the first 10 miles would be free until it runs low and i kick on the...
  21. bike4life

    float charging lifepo4

    I have a bms that will kill power past X voltage when they are charged. I am floating them at a low voltage like at 80% SOC so its impossible for them to ever go fully charged.
  22. bike4life

    float charging lifepo4

    right so i am limited to 10 miles per a123 pack. I want to go more than 10 miles like around 200 miles on a charge. OK no battery system can handle that. So i have a generator. You are correct in using a gasser, however, small 66cc / 49cc gassers are technically illegal in my state in the USA...
  23. bike4life

    float charging lifepo4

    yeah so my 36v powersupply if i turn the adjustment knob to 40v it actually doesnt like that and craps out on me. So i use a boost converter to go from 36v on the switchmode to 42 or what not. I googled the efficiency of a boost converter for a smaller step up and its roughly 90%. They are very...
  24. bike4life

    float charging lifepo4

    yes i run a bms on them 100% of the time riding and charging. I forgot to mention that cause i thought everyone bms's their stuff.
  25. bike4life

    Does this look safe?

    why not go with a higher wattage boost converter. a 1500w boost converter on ebay is 25 bucks
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