Search found 940 matches

by rew
22 May 2018, 05:17
Forum: Hardware Problems
Topic: 3.3V Problems with VESC hw4.12
Replies: 4
Views: 184

Re: 3.3V Problems with VESC hw4.12

Well... the DRV should be functioning as a switching regulator to make 5V. If that doesn't happen, the DRV is broken, or somehow not correctly connected. Can you measure a short between the 5V and GND? There is a zener that tries to keep 5V at "near 5V" levels when the DRV misbehaves and t...
by rew
22 May 2018, 05:12
Forum: FOC
Topic: AC induction motor
Replies: 10
Views: 1530

Re: AC induction motor

Still one year later, the situation is the same: nobody has written the firmware yet.

I'd say that you could give it a go with "foc openloop" and see how close that comes to running the motor acceptably.
by rew
03 May 2018, 06:35
Forum: General
Topic: Make Upload Error
Replies: 6
Views: 357

Re: Make Upload Error

Flashing the binary into the F411 on the discovery board is an "exercise" to see if you have the software and commands set up correctly. The next step is to remove the jumpers hook up the cable to the target VESC and program the VESC. If that does not work, it would seem your connections a...
by rew
30 Apr 2018, 06:45
Forum: General
Topic: Make Upload Error
Replies: 6
Views: 357

Re: Make Upload Error

That "target voltage" line is always weird. The official programmers always have this as an input on the programmer, if it would be a power-to-the-target, you cannot know how much power the target will need and you could get into trouble. On my programmers the software always reports somet...
by rew
22 Apr 2018, 13:48
Forum: FOC
Topic: DRV8302 faults with FOC
Replies: 27
Views: 13195

Re: DRV8302 faults with FOC

What kind of current are you pushing through the motor? What is it rated for?
by rew
22 Apr 2018, 13:46
Forum: Custom Applications
Topic: 5 VESC control for Mars Rover
Replies: 1
Views: 315

Re: 5 VESC control for Mars Rover

For "neatness" I would add a CAN interface to the beaglebone and control everything from there. For "lowest amount of hardware" you could consider having one VESC be an uart-CAN bridge. But that optimization is something that would come back to haunt you later. Not exactly sure h...
by rew
15 Apr 2018, 06:25
Forum: FOC
Topic: adjusting the F_SW and other attempts at silence
Replies: 1
Views: 213

Re: adjusting the F_SW and other attempts at silence

When you move F_SW up, the amount of time spent in the "every F_SW" interrupt (ADC interrupt) goes up. Measurements of the "time left" indicate that about 50% of the time is still not spent in the interrupt. So you could double F_SW. But the occasional overrun is probably quite b...
by rew
07 Apr 2018, 09:10
Forum: General
Topic: Writing to VESC
Replies: 3
Views: 357

Re: Writing to VESC

When you are just changing the operational parameters like "current", you should use the "set current" command. When you are in ERPM feedback mode, similarly you can set the target ERPM dynamically with a dynamic command. If you want to measure voltage and current, calculate watt...
by rew
04 Apr 2018, 20:42
Forum: Hardware Problems
Topic: Low Voltage on 3.3V and 5V Pin
Replies: 8
Views: 498

Re: Low Voltage on 3.3V and 5V Pin

If DRV gnd is unsoldered, the 5V will be higher than normal.
by rew
04 Apr 2018, 04:39
Forum: General
Topic: General questions
Replies: 12
Views: 1449

Re: General questions

Because most people configure the throttle as a current control device, at 0 throttle you will command 0 current. In that case the vesc turns everything off. The gui will however show a duty cycle proportional to the speed.

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