I use a VESC for my DIY longboard for about 6 months and became a sort of VESC evangelist during that time. The ESC used to work perfect and I have a lot of fun riding my board. So first of all I want to thank you (Benjamin) for your great work on the worlds finest brushless speed controller.
Due to the unusually warm and sunny weather around xMas (15°C in Germany ) I took my board for a ride with my 10 year old daughter two days ago. I used my eLongboard, she rode her unmotorized "standard" longboard. We had the idea to pull her along with my motorized longboard, which we did for over half an hour. It is clear that this was heavy duty for both, my VESC and the motor but my board did the job almost effortlessly.
After half an hour, the board slowed down and would no longer let me transmit full (but reduced) power to the motors. I thought of a heat problem ( supposed the MOSFETs reached the "start" temperature of 80°C and the temperature control did its job). So we paused our ride for a short time to give both VESC and the motor time to cool down.
After that we could continue our ride without any limitations, but after a couple of minutes I had the same problem of no full motor power as before. Again, we waited some minutes and tried to move on. This time the motor power completely died away after a short time and never returned to life.
I suppose, that one of the MOSFETs has overheated and died away, but I am not sure. Before I explain what little things I already tested, I write down my setup.
I use 2 10s LiPo Batteries (switched parallel) to gain a proper range. I checked both, they are still working fine.
I have a single motor setup with a "Turnigy Aerodrive SK3 – 6364" from Hobbyking with 213 kv. Of course, it could also be a motor problem. Unfortunately I have no other ESC to test the motor properly. I only did some kind of weird "quick test" by turning the motor shaft after holding first two and then all three motor connector cables together. I had to use more torque to turn the motor shaft after connecting the cables which is supposed to be an indication, that the motor is working properly. I also suppose that if the motor died, it would have happened suddenly without first reducing the motor power.
3. VESC: I purchased my VESC from Enertionboards.com as a fully assembled ESC. It is version 4.7 with firmware 1.10
Here is the configuration of my VESC:
- Bildschirmfoto 2015-12-29 um 12.22.33.png (167.44 KiB) Viewed 3692 times
And here are some pictures of the ESC. I could not detect any "cooked" or "burned" parts or solder joints. Even the MOSFETs look fine to me.
- IMG_3556.JPG (123.64 KiB) Viewed 3692 times
- IMG_3555.JPG (118.11 KiB) Viewed 3692 times
When connecting the ESC to power, the usual LEDs start to light up. It also receives signals from my Nunchuck, as the LEDs start blinking when I move the joystick. Connecting it to the BLDC tool I am able to read the motor configuration. Nevertheless, the motor detection fails without a specific error message.
What do you think is the most probable reason? What further tests can I do to isolate the problem and to fix it?
Any help is highly appreciated as I want to ride my board again as soon as possible.
Thanks in advance for your help an best regards,