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  1. R

    BLDC motor and controller

    Hi, I am quite new to the EV space. I am working with BLDC motors and controllers in electric vehicles. We have a 48V 5kW BLDC motor with rated RPM as 3000. Does this mean that the voltage across the motor will be 48V only when it is running at 3000 RPM and the controller varies the supply...
  2. R

    Drivetrain selection for an electric drive system

    When I mentioned 8-10 hrs, I meant to say the entire operational time in a day. The distance covered wouldn't exceed 125 miles a day which seems to be normal. I'm still working out the economics, but just figuring out the possibilities as for now. Trying out different motors and drive-train...
  3. R

    Drivetrain selection for an electric drive system

    Not really huge, I'm powering it with Li-ion packs that weigh around 30kgs, chargeable in ~6-8hrs. Thanks for the other suggestions, I will take note!
  4. R

    Drivetrain selection for an electric drive system

    A front hub motor is an option, however for my application, I would need >5kW hub motor which is turning out to be expensive, also due to the fact that the trike is being steered by the front wheel, I'm afraid it might affect the vehicle dynamics in terms of steering, a lot. Could you give me...
  5. R

    Drivetrain selection for an electric drive system

    Sure, will keep this in mind if I continue to use a chain drive!
  6. R

    Drivetrain selection for an electric drive system

    Thank you for your suggestions and views. From my preliminary research, the belt drives seem to have heating issues and tend to wear out pretty quickly requiring frequent replacement, unless I go for kevlar reinforced belts which are quite expensive but still have heating issues. My...
  7. R

    Drivetrain selection for an electric drive system

    Thank you for your replies. I was considering shifting to a gearbox with a single reduction as it will require least care in terms of frequent maintenance. Also, isn't the efficiency of a gear system better than a chain drive? Please clear this point. Thank you!
  8. R

    Drivetrain selection for an electric drive system

    Hi all, I am designing an electric drivetrain for a three wheeler (tuk tuk) using a BLDC motor and controller. I am powering this with a lithium ion battery pack. I am currently using a chain drive with a single reduction gear to transmit power to the rear wheels. I would like to know the best...
  9. R

    Running multiple Li-Po battery packs in parallel

    I don't have any pictures unfortunately. You could look up "tuk tuks" on the internet. My application is on a similar looking vehicle. Thank you for the other suggestions. Will look into the issues you have mentioned!
  10. R

    Running multiple Li-Po battery packs in parallel

    Thank you for your suggestions, I will look into using optocouplers as you mentioned. Its a three wheeler that weighs around 600lbs and a payload of another 600lbs These are 18650 NMC cells that I use in 13s12p configuration. Haven't packed it myself, got it sourced from a supplier. I think...
  11. R

    Running multiple Li-Po battery packs in parallel

    Firstly, thanks a lot for your answer and suggestions! I am planning to use these to power a 5kW motor in electric vehicle application. Hence the high requirement. I use Li-NMC packs and they're not very heavy, a 2kWh pack weighs around 20lbs To prevent the issue of overloading the other packs...
  12. R

    Running multiple Li-Po battery packs in parallel

    Hi, I am using a 48V 25Ah Li NMC battery pack to run a 1kW BLDC motor at 1C discharge current. I am replacing my motor with a 5kW unit to suit my needs. I want to use 4 of these 48V 25Ah battery packs in parallel (also at 1C discharge) to power my new motor. Is there a need for a master BMS...
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