Ubergeek63
Well-Known Member
Hi,
I'm an electronic engineering student currently working on a project for my university's student racing team.
Then goal is to provide an electrically actuated gear shifter to operate the cars gear box, i.e. a paddle shift gearbox.
The gearbox on the car is a sequential shift gearbox taken from a honda motorbike.
Fine...here is my plug for it...
https://www.electro-tech-online.com/custompdfs/2010/03/237593.pdf 4.4V 2A 2 NM stepper at 2Kg (while you say yours is 3Kg the data sheet says 4Kg)
a 7:1 ratio gives 14NM at the shaft
a 24V source with current source electronics limiting it to 2A/phase you should be able to go 360 deg in 133mS or your 36 deg in 93mS. running at 200mS leaves plenty of head room for supply droop.
LiFePO4 18650 Battery: 12.8V 800 mAh (4x18500 4S Flat, 5.0A rate) with PCB $25 800mAHr LiFePO4 rechargeable weighs in at 0.2Kg and should be good for 3600 shifts ... theoretically ... fine, sue me, call it 1000 shifts, it will still last 1.4 Hrs continuously shifting every 5 seconds!
Dan
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