Matt, if the motors are BLDC, then I would say that VESC is a resonable choice. At first I thought the motors were oldfashioned DC motors.)
Can you provide a link to the motors that you have?
Search found 931 matches
- 27 Mar 2016, 11:20
- Forum: General
- Topic: Is it possible to use the vesc for wheelchair hub motor
- Replies: 9
- Views: 2135
- 27 Mar 2016, 11:16
- Forum: General
- Topic: Long motor wires (vs. long battery)
- Replies: 10
- Views: 2766
Something that I've come to realize only recently while working more intimately with the VESC is that it is quite possible to have much larger motor-current than you think. (some details changed to protect the innocent...). A friend had a 20A motor and a 30A ESC. The motor was rated at 50V and 10000...
Hello Akira, you should pick your motors based on rpm they are meant to run at and by their efficiency curve (which is a function of rpm): http://content.vexrobotics.com/vexpro/images/motor-data/dc-motor-intro-motor-b-2.PNG The graph shows a decreasing "current" line that starts at the st...
Benjamin: on my hardware the current sense channels were assigned differently than on your hardware. So I changed things around and got "weird" (i.e. not working) results. Spent a week trying to figure out what was wrong. In the end it turns out that the assignment of the channels happens ...
In the smaller packages you can only dissipate about 1W before things get too hot. The bigger tolerate about 2W. This means that the RDSon specification is VERY important. So for the SO8, you roughly get P = I^2.R or I = SQRT (P/R) = sqrt(128) = 11A max. My quick-and-dirty calculation would lead to ...
- 27 Mar 2016, 09:12
- Forum: FOC
- Topic: Question about ADC Injected channelks configuration
- Replies: 5
- Views: 2130
There is code to sample the current twice and then average the results. It looks to me as if this was an attempt to get less noise, but it was abandoned because it didn't help much. So the option to sample twice is turned off by default. The second set of initializations (with the "2" in t...
- 27 Mar 2016, 09:08
- Forum: FOC
- Topic: Position control with an overlaid velocity control
- Replies: 1
- Views: 806
I would say: if you need an industrial solution, get an industrial motor controller. But you'll have to bring a full bag of dollars. If you want a cheaper solution, VESC may come into play. But VESC is limited to about 50A and 50V. That is enough for your "about 1kW" but if your motor is &...
I made the same mistake. The thing that I didn't understand is that I could make it "a little more stable" by increasing the Ki enormously. It is starting to make sense now. By increasing the Ki in the current control loop, I'm making that slower, so the bad parameters in the speed control...
As far as I know, the firmware is "enforcing" a specific average voltage on each of the motor leads by setting a PWM value for each of the motor leads. Now classical PWM is on/off, but in this case, we're switching between "drive low" and "drive high". So each PWM cycle...
Rfvito, that is not true. I have a 4700 uF capacitor. When I accelerate the current spikes to 20A or something like that. Reworking the capacitor formula, i = C dU / dt into dt = C dU / I, we can calculate that it takes 0.2 miliseconds for 20A to cause a 1V drop across the capacitor. The current spi...