thorlancaster328
100 W
- Joined
- May 25, 2018
- Messages
- 197
About a week ago, I decided that I was going to build an electric bike. I was looking at kits, and all of the cheap ones have cheap controllers (go figure!). As a result, I decided to build my own. Right now, I have been soldering for a day and it is looking pretty nice. All 3 channels test out fine, and I am hoping to run about 1.5Kw through it when it is finished. I will be using a "1000w" motor, modified (drilled holes) for higher sustained amps.
Here are the specs:
Controller: Teensy 3.2 @ 72MHZ
MOSFETs: IPB049NE7N3 [N-channel, 75v and 80A rated] and IRF5210STRLPBF [P-channel, 100V and 40A rated X2 in parallel].
Max voltage: Theoretically 75, but I'm using it at 50.
Max current: Theoretically 80 amps, but I'm not using a huge heatsink, so probably less.
After I finish building the controller, I will release the code and a tutorial so that you can build your own. If you buy better MOSFETS / more MOSFETS / a bigger heat sink, you could build one heck of a controller (for racing maybe) by paralleling the MOSFETs. I will be using a 100x35x10mm heatsink from eBay, as well as thermistors in the motor and by the MOSFETs to prevent overheating.
My one question at this stage is: Do I need a bigger capacitor? I will be using this with a low-resistance Lithium Ion pack (17AH, 12S8p 18650).
Here are the specs:
Controller: Teensy 3.2 @ 72MHZ
MOSFETs: IPB049NE7N3 [N-channel, 75v and 80A rated] and IRF5210STRLPBF [P-channel, 100V and 40A rated X2 in parallel].
Max voltage: Theoretically 75, but I'm using it at 50.
Max current: Theoretically 80 amps, but I'm not using a huge heatsink, so probably less.
After I finish building the controller, I will release the code and a tutorial so that you can build your own. If you buy better MOSFETS / more MOSFETS / a bigger heat sink, you could build one heck of a controller (for racing maybe) by paralleling the MOSFETs. I will be using a 100x35x10mm heatsink from eBay, as well as thermistors in the motor and by the MOSFETs to prevent overheating.
My one question at this stage is: Do I need a bigger capacitor? I will be using this with a low-resistance Lithium Ion pack (17AH, 12S8p 18650).