At high speed: motor generates 50v for example, the battery is at 50v also, the esc sends 15 amps from motor to battery, meaning around 750W. Times 2 it’s 1500W.
As the board slows down, let’s take another snapshot of the values: at slower speed, motor generates 10v, the esc takes 10v at 50 amps (500W), transforms it into 50v at 10 amps and sends 500W into the battery (times 2, 1000W for both motors).
50 amps tends to lock my wheels on wet asphalt, 40 amps seems the sweet spot for me to not lose any traction. I use my vx1 remote mostly as a on/off switch with big ramp up/down times. The travel distance for that thumb wheel is garbage
Hmm, are you getting only 35 with the wheels in the air? Or when you ride it?
You’re getting a lower speed because of losses. Wheels, air drag, bearings, everything bleeds a bit of that energy away until it’s 100% losses at 35km/hr and you reach a balanced state
Maybe due to the 10A and one motor limit, the 250m street I tested it on, is not long enough to hit the speed too.
I will use a remote with telemetry later on, but now I don’t have any reference of how fast I am etc. I just used a GPS speed app and stored the phone in my pocket ^^
Final setup is planned to be davega + firefly nano remote
10a at i assume 10s (36v) gives you 360w peak (edit: max voltage of 4.2v gives 420w peak). A basic diy with 12s4p 30q’s gives 2000w peak. Bit of a difference there tbh
So, I can get 4 channel PPM configured on my controller as well as frame and pulse lengths. Looking at the VESC docs, it isn’t yet clear to me the exact PPM train the ESC wants: vesc-project. com/node/181
But it does look like VESC’s accept “PPM Input, from Conventional RC Receivers”. My question is - who’s definition of standard? Will it accept anything more than 1 or 2 channel ppm? I’m going to have to play around with this a bit when I get the ESC and motors. In the worst case scenario I would just have an Arduino generate the PPM train desired by the ESC and plug that into my crossfire TX with the PPM pigtail connector that came with it. Then I could control speed by having the Arduino modulate the ppm train based off of a potentiometer or something. I would much rather configure the ESC to accept 4/8 channel PPM though…
So hopefully I can decide on the motors and everything else soon so I can start playing with this!
Yes. You can set a maximum ERPM limit that the controller will not exceed.
That’s normal, and it seems far more drastic when testing on the bench than it does when riding. You can change the throttle response curves in vesc tool, but that will only help so much. You just have to get used to it. This behavior is very similar to how a car’s accelerator behaves: On level ground it takes very little accelerator to reach cruising speed. You only need to use more to reach it faster, or to go up hills.
Can anyone recommend a cheap intro into the world of pneumatics? I’m talking about a set of 4 wheels with 2 of them having pulleys included.
Needs to keep my top speed in the 60km area, using 12s 190kv and 16t motor pulley. Most likely 50-55t wheel pulleys
Be very careful with that, and test it at lower speeds first. Sometimes it can cause speed wobbles when the max limit hits, and also make sure you still have brakes above the maximum.
How bad, if at all, would it be to have Evolve Double Kingpin Truck on the front and Caliber II E-Truck in the rear? I miss how carvey the Evolve trucks are, but I dont want to have to invest in modifying the rear Evolve truck to support my 6355 motors. Plus I want my build to still sort of fit in my Hoyt St bag for transportation.
