hjns
100 kW
Gab said:is it possible to implement a motor rpm counter and rev limiter ? to protect overvolted unloaded motors
I think it is essentially the same as a speed limiter, which is already available in V2.
Gab said:is it possible to implement a motor rpm counter and rev limiter ? to protect overvolted unloaded motors
amberwolf said:I hadn't thought of that psosible problem, but if it's a series-wound brushed motor, it can indeed run away when unloaded. I know of at least one DIY car conversion that exploded the commutator from doing this.
If he wants to use the CA to control something with one and a transmission that could go into neutral, I guess it might be a helpful feature there too.
Foregoing the question of whether you need rev limiting or not - if you wish to keep an eye on RPM:Gab said:hi guys should of added more detail. this is for a brushless middrive setup. do you think this is possible to show motor rpm in the ca? or should i try and find a controller to do the rpm limiter ?
Gab said:As hillzoflap just said, the other reason it would be nice was to know where abouts i am in the RPM efficiency window, hence if RPM was displayed on the screen with all the other data then we could throttle and change gears to get max efficency. is it possible to add another speed sensor and not repurpose the road speed sensor? becuase i will loose the functionality. Since the CA already connects to the throttle for current limiting then it would be ideal if it also did RPM display limiting for mid drives.
+1hjns said:Do you really think that you will keep looking at the screen while shifting gears and try to get max efficiency? I would rather look outside to traffic, nature, and beautiful women.
Joe Perez said:Justin, I'm a month and a half late in posting this (I've been out of town) but build 17 of the code seems to be working nearly perfectly on my hubmotor bike using current throttle. No more surging, no more miscalibration. The only oddity I have noticed (and this is an exceedingly trivial thing) is that when I review my post-ride data, the MaxS display shows a very high number. At the moment, for instance, it shows "334." MPH.
It's always done this, but in the past I assumed that it was directly correlated to the "runaway speedo at powerup" anomaly that existed when the user had "Miles" rather than "Kilometers" selected. And I did check to see that, unlike before, the MaxS value is not becoming corrupted immediately at powerup- it happens during the ride.
Come to think of it, I have not tried doing a full ride in "Kilometers" mode on build 17 to see if there's still some relationship there. I've just changed units and reset the log, and I will see what it does on the way home this afternoon.
I am using the same reed pickup that I used with my V2 and have had similar spurious high speed readings from the outset. This never occurred with my V2. The spurious changing high speed readings on the V3 go on for a period of time with no brake application and at slow rolling speed on pavement or even for a bit after a stop. For my bike, these incidents do not appear related to the pickup.mrbill said:While your problem may not be related, I discovered that with the later models of the CycleAnalyst I would get high MaxS (maximum speed) readings occasionally, between 300 and 650 mph when this occurs.
I tracked it down to the concurrence of two things. The newer CycleAnalysts use a reed switch pickup that is sensitive to high-frequency vibration that occurs when the rim brake on the sensored wheel, usually the front wheel, squeals.
methods said:Oh boy... Matthew and I just got a big box full of V3 CA's... looks like I have 40 pages of catching up to do
Excited to try out the new features.
We already have an RTC, micro SD, USB (and all of the usual arduino stuff), RTD's, wireless temp, hall current sensing, RPM, and other things I have forgotten. Some of this overlaps with CA functionality but some of it does not... I would really like to see what people can come up with.
-methods
I haven't seen this particular boot failure display symptom (mine is always blank with backlight on)...hjns said:My CAv3 b16 just stopped working. When I power on, the CA goes through boot, and then shows only a horizontal row of rectangles. Powering off and then on again results in the same. Should I try to flash? I am open for any suggestions!