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.
Hello Vesc community,
Hi!
I recently saw a STM32 'black pill' is now available on Aliexpress for low costs, can a VESC be built on these microcontrollers ?
They have either STM32F401CCU6 or STM32F411CEU6 MCUs
Advantages:
- No soldering of MCU
- Easier DIY board
Thanks!
Hello!
I have been noticing that under lower voltages, the amount of resistance given by the same motor under a lower voltage is a lot less than the resistance given under a higher voltage. Is this normal behavior? Or should the resistance under regen braking be the same as long as the motor do not reach the set braking current?
Thanks,
Steve
