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  1. Astropower

    Small Brushless More Powerfull compare to Big Brushless motor ? Help me to understand

    Hello There, I want to change motor to my E-Scooter. My question: How can be, Small Brushless Motor, can be more powerfull compare to bigger Brushless motor ? The winding is smaller The magnets are smaller Does the manufacturer give false information? ** Small motor cost 4 times more. Here...
  2. Astropower

    Polaris Ranger EV

    Polaris Ranger have Induction motor (AC), The RPM controlled by Phase Frequancy. Higher Voltage have potential of higher current = More Torque. This Vehicle Build for 48-56V. Motor contoroler and DC-DC converter. In this voltage range you need battery which can supply 480A continual current...
  3. Astropower

    Polaris Outlaw EV conversion

    The questions what the purpose of this conversion ? The main Idea of Outlow is sports purpose, due to low weight - about 170Kg, and high HP - About 55Hp - about 40Kw. For example, the Polaris Ranger EV, Lifepo4 Battery pack is about 20Kw, 52V 400Ah. weight about 320KG. Battery Only. + 8KW...
  4. Astropower

    Polaris Ranger EV

  5. Astropower

    Polaris Ranger EV

    Hello, You can ignore this 12V. all the 12V system works on 48V to 13.8V converter. Here is the biggest Lifepo4 converter for Polaris Ranger EV 64 Cells, 16S4P of 100Ah CALB (108-112Ah Real Capacity) over 21Kw Battery. Chargery 16S PRO BMS (The 1.2A Balance not suitable for high Capacity...
  6. Astropower

    Polaris Ranger EV

    Hello, Chargery BMS16T if almost fine. You should ask for 600A Shunt and 600A Relay. 800A will be better. The problem that BMS16T, that balance function work on bleeding. not suitable for big capacity cells. i suggest to add active cell balancer. 3-8A. Increase voltage would not increase...
  7. Astropower

    Bike Pusher

    Hello Hilter, You are right, This will solve me the problems in section 1, 5 & 6. and will increase the problem in section 2. In my next project I'll think about something like this :).
  8. Astropower

    Bike Pusher

    Now i need to solve some issue on the turns, that the hubwheel not be draged. About the friction between the hubmotor and the road, test results: Zero speed - only 30% power is available, more than that, the tire starting to slipping. About 2-3MPH (3-5Km/H) 50% power is available. About 10MPH...
  9. Astropower

    Bike Pusher

    Hello, Thanka all for sharing your thoughts and your opinions, i'm sure it would help me improve this thing. I really dont like much the friction drive, because several reasons: 1. RC motor generate lot of noice because high RPM. i like the quiet of gearless hubmotor. 2. Need some mechanics...
  10. Astropower

    Bike Pusher

    Step one, i got the Hub motor about 9-8 inch size, 36V 250W. i build somes simple device, to connect the motor to bike axis. soon i will connect to controller and battery, and test it. here the pictures:
  11. Astropower

    Bike Pusher

    Hi, Thanks for your advice. Theoretically, Wheel with good grip should done it pretty well, by the drawing we can see, if the front wheel cannot move, distance of the two wheels (blue lines) will generate angular strength (purple line), and when the hub motor, will start pushing, the green...
  12. Astropower

    Bike Pusher

    I got some idea, i draw it. this my idea, and i will build one. to use small hub motor, to push the bicycle. i will buy some parts now.
  13. Astropower

    Bike Pusher

    Hello there, I am thinking about building some device to let me feel like ebike, but device which can connect and disconnect quickly from the bike easily. so i am thinking about e-trailer or friction motor. what you would suggest me? TNX
  14. Astropower

    Another RG250 with Colossus Motor

    You can read this article and see the test results of Gear and NON-Gear with benefits when installed gearbox. http://www.fallbrooktech.com/sites/default/files/videos/LEV_CVT_Whitepaperrev10.pdf This is Automatic Gear system. I have this system on my Scooter, (see the rear wheel, that is not Hub...
  15. Astropower

    Another RG250 with Colossus Motor

    Nice job you done here, Why you dont add transmission? -for better acceleration and the ability to drive uphill, and most importantly, it saving a lot of battery energy.
  16. Astropower

    DIY, Balance board for LiFePO4 cells, with Zener Diode

    Hello, I have Battery Pack that i build with 16 cells of 15Ah, LiFePO4 (3.2V Nominal 3.65V Maximum). I dont want to use in BMS, my opinion that i waste of money. the most two important things to protect the cells, to cut off the battery when voltage too low, my Motor controller have this...
  17. Astropower

    Stand-up escooter, ze Meduza project

    Looks great, Very high quality job you done.
  18. Astropower

    Stand-up escooter, ze Meduza project

    Very Clean and professional, tell me please, how much weight all this scooter ?
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