About e-bike's motor, what is the difference between 500W and 350W????

Discussion in 'Electric Bicycles' started by Morgan bro, Nov 23, 2016.

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  1. Street Ryderz

    Street Ryderz Active Member

    It's not hard you seem to confuse AVERAGE with max!The continuous average is whats rated then there is a safety zone so that if you load it up you dont cook the controller! the manufactures don't really give a sufficient buffer though.when I build ebikes for customers with tight budget i recommend that they use a controller that is 20 percent higher output to get the max out of motor and still have a good buffer!
     

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  2. KCvale

    KCvale Motorized Bicycle Vendor

    Well, you can get some decent speed and range @36V 360W with gear help.

    [​IMG]

    Micargi 3-speed Rover with SBP electric kit, but a wimpy 36V 'bottle' battery.
    Good for ~20 miles at ~22mph with no pedal help.

    The motor and controller can take huge voltage and current, but will run even small power just fine.

    My point is don't limit yourself to pressing the limits of your motor and controller as you never want to worry about adding more battery power like this example.

    I had a big square 48V LI battery on hand slated for trike, but I shoved in this bike with same motor/controller in the above SBP e-bike parts 3-speed.

    [​IMG]

    Electra 7-speed bike.
    53V LI battery.
    1680W 48V motor.
    Programmable controller.
    0~40 mph in ~10 seconds.
    ~40 mile range between charges.

    It was too funny when the customer, a kid, took delivery.
    Though he was warned to take it easy off the line he didn't get 10' before for flipping off the back from a wheelie.

    He was geared up and didn't get hurt, but it was sure a wake-up call to him about how much instant power there was.
     
  3. wheelbender6

    wheelbender6 Well-Known Member

    I read somewhere that the engine watt rating was a product of how thick the winding wire is within the motor.
    Thicker winding wire will accept more watts without overheating.
    Thinner winding wire overheats with fewer watts applied, bit it is more efficient at lower wattage.
     
  4. chachacharles

    chachacharles New Member

  5. KCvale

    KCvale Motorized Bicycle Vendor

    Isn't that just 'cute' hehe ;-}
     
  6. CrazyDan

    CrazyDan Active Member

    Lol I swear this chacharles guy works for addmotor
     
  7. DrkAngel

    DrkAngel Member

    Electric motors are rated 350w, 500w etc by watts of power output, not input!
    A 500w motor can input 2700w briefly during acceleration from a stop.
    or
    Suffering up a steep hill at slow speed - with resulting smoke and melt down ...
     
  8. Morgan bro

    Morgan bro New Member

  9. darwin

    darwin Well-Known Member

    OK let's break this down using the KISS principle. More watts = more power. Battery rating of 10ah is better than say 8ah rating which means more capacity. Each one that increases will cost more.
     
  10. Street Ryderz

    Street Ryderz Active Member

    Straight up!!!
     
  11. morgan

    morgan Guest

    If 350W motor bike can ride on the beach normally?
     
  12. Street Ryderz

    Street Ryderz Active Member

    Probably not!
     
  13. CrazyDan

    CrazyDan Active Member

    The beach is mostly flat ground, so it shouldn't have an issue at the beach for cruising speeds.
     
  14. Street Ryderz

    Street Ryderz Active Member

    The beach is sand and if soft not hard packed like close to the water very hard to ride on with bicycle tires and therefore also hard on a low power electric drive!
     
  15. Morgan bro

    Morgan bro New Member

    Make senseļ¼So 500W motor can conquer the beach?
     
  16. Morgan bro

    Morgan bro New Member

    Have you ever tried?
     
  17. Street Ryderz

    Street Ryderz Active Member

    Yes I have tried,and it doesn't work well at all!front tire gets hung up and digs in if you turn,rear tire see's extra load from trying to push thru !
     
  18. KCvale

    KCvale Motorized Bicycle Vendor

    Sand is like Mud, Water or Snow, you want to stay on top of it AND maintain control, and that takes power to compensate for the drag.

    I am kinda proud of this build for what you looking for.

    [​IMG]

    Just short of a Kilowatt to the shifting back wheel ;-}
     
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