Search found 905 matches

by rew
27 Mar 2016, 09:08
Forum: FOC
Topic: Position control with an overlaid velocity control
Replies: 1
Views: 704

Re: Position control with an overlaid velocity control

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 &...
by rew
27 Mar 2016, 09:04
Forum: FOC
Topic: FOC: Motor oscillating back and forth
Replies: 9
Views: 3618

Re: FOC: Motor oscillating back and forth

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...
by rew
27 Mar 2016, 08:55
Forum: Hardware Problems
Topic: DRV Fault GVDD
Replies: 9
Views: 2880

Re: DRV Fault GVDD

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...
by rew
27 Mar 2016, 08:11
Forum: FOC
Topic: VESC v4.10 and battery cable length
Replies: 7
Views: 2405

Re: VESC v4.10 and battery cable length

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...
by rew
25 Mar 2016, 14:14
Forum: For sale, orders, etc.
Topic: VESC-based board(s) for sale....
Replies: 42
Views: 9232

VESC-based board(s) for sale....

I'm building a VESC-based ESC. VESC is split into three separate modules. For each module there currently are two choices. Modules: CPU : * STM32F405 * STM32F072 (not VESC software compatible) * adapter module for TI launchpad (not VESC software compatible) FET driver and current sense amplification...

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