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Control of 4000w bldc motor with hall effect sensors

Submitted by Abdullah Ajmal on Sat, 2022-04-16 10:14

I needed to know that whether we can control 48V 106A(peak current)  4000W BLDC motor with vesc. And if so then which of the vesc model will be suitable to control this much amount of power. Secondly the motor comes with pre build hall effect sensors how would we integrate these sensors into the existing circuit.

 

Motor compatibility (and power levels)

Submitted by MrSurly on Tue, 2022-04-12 21:43

Hi everyone.
 

I'm in the early stages of making an e-motorcycle (full size, licensed, etc).  I really like the VESC controllers, particularly the open-source ethos.  As such, the design plan is to start with the assumption that the controller will be VESC based.

I have some related questions:

Flipsky 75/100 Mosfet short?

Submitted by Michael Campbell on Mon, 2022-04-11 08:29

Hi All.

I have bought a flipsky 75100 VESC to replace the original controller on a Xiaomi M365 pro scooter. 

While testing the controller, I had been having trouble with it cutting out under load. It would start off smoothly, but then suddenly cut out at a certain speed when accelerating. 

I played around with current settings to see if I could make it better/worse. Now though it has died completely, with the following symptoms:

VESC as a grid Tie inverter

Submitted by pf26 on Thu, 2022-04-07 15:20

Hello, I try to use a Vesc to inject little power (a few tens of watts would be okay) from a 24Vdc solar system (approx 30Vdc fully charged) to a 400Vac 3 phase grid.

I use 3 toroid transformers to get 15Vrms between phases from the 400Vrms grid, I can see in Vesc tool nice 3 phase BEMF with 3000ERPM (=50Hz grid), just like a running motor.

In FOC mode, the VESC shows 88% duty to keep track of the grid. I set a 2Amps motor current and expected to inject around 30Watts (don't know if it is per phase or total).

Kill switch

Submitted by 999dom999 on Thu, 2022-04-07 10:44

Forgive my ignorance, to set either adc or ppm to low do I connect ground to the signal wire?

I have a scooter with hydraulic disc brakes and I want to cut the motor while braking. The brake levers have sensors that are 2 wire "normally open" so I can join the 2 wires between signal and ground and it will make a connection when I pull the lever. Just checking this is the way to do it?

Kill Switch Settings

Disabled

No kill switch is used.

PPM Low

Pid_Speed is braking despite no brake option

Submitted by Flyingtux on Thu, 2022-04-07 09:41

Hi,

I'm using the vesc 75_300 with firmwware 5.3 version with pwm app

In "pid speed no reverse" mode (helicopter application), when the servo reach 0, I have a strong brake of the motor.

In "current mode no reverse", there is not his problem, current and duty seems always positive and I can stop more quickly without active braking.

Here is the graph screenshot with a pwm down ramp of 17s to avoid to break all my mechanic (no free wheel, so active breaking is prohibited)

Thanks in advance

Burned my VESC 6 MKV. Wrong polarity

Submitted by okhsunrog on Thu, 2022-04-07 01:44

<p>It's the first time I do such a stupid thing. I connected - to + and + to -. It was really late and I wasn't really careful soldering XT-90 connectors. So there was a loud sound and XT-90 connector turned black. I guess it was connected less than for a 1 second. When I connected it the right way afterwards, it didn't turn on. No LEDs were on. What can I do? Can I repair it? Is it worth fixing? It was a really expensive thing for me to buy, like a half of my salary and now I'm really worried. Can you help me, please?</p>

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