DogDipstick
100 kW
HrKlev said:Thanks a lot for a very informative answer! I will have to read it a couple more times when I have the time
Kind of makes me want to buy a CA and a torque sensor anyway, to try it out. What kind of setup do you have? And do you think this system is responsive for technical single trail riding?
Yes, with careful manipulation of the values at hand, max power desired, and speeds, this system is responsive enough to give you a good "assisted" experience, save Wh, and let the pedaling feel much more natural when you are ( pedaling cadence vs load ( hill)) within the range of human force.
You can put a monster chainring on and you will feel like superman... because where you couldn't move the ring rpm before ( ever try to start out in the biggest chainring to the littlest cog? bah, cant do it.. but with PAS you can... if you set it up right. ) but the PAS means you can now.. and the system is fast enough to work around your input based on the values set in the CA. The range of 0-5v is probably input t0 the CA in a 256 step algorithm.. and it reads this many many times per second... fast enough a human cannot feel it... so it turns those 0- 5v reading into 256 possible outputs for the ADC. ( output resolution?).. You can manipulate the input many ways with the CA3 system.
Set up nice, you dont feel the motor as much as you feel the assist of power. Makes you feel like superman honestly sometimes...
Durability is my only real concern. No problems yet, but the TCDM sensor feels like it doesnt like the full tq. I produce with my legs. I got alot of power in my thighs, and can destroy ( from wear) a normal cartridge bearing bottom bracket in a season if I pedal hard.. and this is an expensive BB. I like to treat her nice, and not pump as hard as I can. Sometimes I wish I could input my whole human power into the bracket but it feels like a little "chintzy" ... compared to high end bulletproof DH bottom brackets that can take a humans full cranking tq... without care.. (185lbs on the end of a 1 foot lever.. ). I feel like i would lessen the lifespan If I just cranked away as hard as I can. It is a sensitive electronic component... and a lil pricey.
My bike is a 24" moto wheel XC DWlink bike.... all 7005 double butted and a pretty high quality bike for its day and cost..... Its rebadged, but still an Ironhorse. The DW link is the most amazing feeling I felt pedaling ever.. The more you pedal, the more anti-bob it puts in and is a very nice experience... for a FS mountain bike. It just stiffens and then lessens the bob like amazingly.
Yes I go on trails, yes the pedaling makes you feel like no effort, esp. wth the pedal assist. I may even go as far to say pedaling a PAS DW link bike at 8mph up a trail is finer than blasting up it at 30mph on hub power like a MC. You dont feel the weight of the bike, and the pedaling is dominant for motive traction. Certainly a Muscle bike though, if I turn it up.
On Pas, I use about 5-8A... Max... of 100A. Go all day on a 8A draw on a 1270Wh pack. Most times under 5A.
Here is a datalog of a human trip with assisted power from the Tq. sender. You are either turning PAS or turning Throttle: The PAS works until you hit the throttle, then the throttle takes over. No both at the same time. The lower graph shows the human tq., power, cadence( rpm) and output/input throttle values to /from the CA....
