General discussion

I recently upgrading to the latest firmware to try out HFI, which is pretty awesome. However, I noticed that when braking, once I hit HFI mode, braking is pretty much non-existent. This generally isn't a problem, since I can just step off the board or use my feet to come to a complete stop. But sometimes, I do want it to not only come to a complete stop, but hold the brake even at 0 rpm. Is this possible? Is there some config settings I don't know about? Thanks.

When I let go of the throttle, i almost always fall off (Never have) but It always scares the crap out of me unless I slowly release the throttle.

Anyway to smooth that out?

I am using a Flipsky dual 4.2 and VX1 Controller

hello I'm Korean,,using VESCs for startup company's product being developed.

my goal is to connect 4 vesc via CAN, and to connect to PC(Jetson tx2) via CAN. because our project must use this PC. how i can do? in the case of USB connection, the connection may be disconnected sometimes and there is a delay each time, so we are considering CAN communication without problems like this.

0. I found some thread that talk about 4wd connection. I think 4 VESCs connection , and VESC to PC via USB will be hopely work.

Me and my son are building a e-scooter with a 5 phase BLDC motors we have handy (25 poles). The idea is to build the driver based on the Vesc 75/300. 

Can anybody predict how difficult it would be to change the Vesc firmware for 5 phases. 

How compatible will that be with the Vesc tool?

All advises are very much appreciated. 

It's a noob question. The vesc 75/300 has 3 battery wires with 4 mm2 thickness each. That's only 12 mm2. According to this page https://en.wikipedia.org/wiki/American_wire_gauge that size is rated for much less continuous current. And also the xt90 connectors are for 90A max, so 270 altogether. How is it enough for 300-450A? Somebody please explain it.

Hi everyone -

I am building my first ebike and I have everything working (I think), but am running into an issue where the motor will not go above a certain RPM even with 0 load. I cannot determine what the bottleneck is and it is driving me crazy. As far as I can tell, the VESC is running below the ERPM Limits, and the current limits, and the temp limits, so I do not understand why it does not continue to accelerate.

Hello, everyone,

I'm experiencing some weird motor oscillations with the VESC running in FOC mode. I am running a t-motor MN4012 480KV with a 15x5 propeller at 24V. The VESC hardware I'm using is the FSESC 4.12. When I get to approximately 60% duty cycle the motor starts oscillating. Sometimes I see weird drops in thrust as I increase the duty cycle. I recorded a log of it happening and I also have a plot of the current when the oscillations happen. I'm pretty new to the VESC so idk if there is a setting that I'm missing to make FOC run correctly.

Howdy y'all. 



Trying to drive a large inrunner (rotor diameter 320mm, 42 magnets, so 42 poles) with a Flipsky FSESC 4.12. Updated to latest firmware and running in FOC mode.



I was surprised with the level of noise when running in FOC mode, which I'd heard was supposed to be fairly quiet. Running at max RPM at 55V (~900rpm), it's heckin' noisy. I've linked a Youtube video of the noise.



Is this normal noise for FOC or have I done something wrong?

I am currently pre-testing my motor setup without load. I have 2 sets of a Trampa VESC 6 Mk III and a Golden Motor 3 kW BLDC motor (7.8 kg) each. Battery voltage is 51 V. My control input is via COMM contacts using the pins VCC, GND and ADC1. The mapping I used was the default one: start with 0.9 V center at 2.0 V full at 3.0 V.  I did run the setup wizzard and suppose the motor data are recorded correctly. After a couple of tries the motor did spin nearly as it should. I will use the motors at a boat, so I need the motor going forward and back.

After tinkering with HFI and getting really good results pushing higher currents while accelerating, I realized that the VESC has an option for saturation compensation, but not a simple way to measure the point at which the stator saturates.

The VESC has all the hardware necessary to pulse the stator with current, measure the phase current/voltage ramp characteristics, and spit out the current at which the stator saturates.