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Maytech VESC 6 FOC turn off without fault at high erpm, blower

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gabrield
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VESC Free
Joined: 2020-05-10 17:17
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Maytech VESC 6 FOC turn off without fault at high erpm, blower

Hi everyone I'm using a Maytech SUPERFOC 6.8 with a 24V 15A PSU, and I'm using it to operate a bldc blower in FOC mode with hall sensor (auto recognition of FOC parameters ok).

The VESC responds well up to 60K ERPM - 90/93% Duty cycle approximately, and after the VESC shuts down the motor completely without signaling any failure.

To restart the motor I must press the stop button, set the PPM to idle and then raise it again.

The motor never exceeds the set current or others limits.

The firmware is the last available in the VESC TOOL.

I tried to use the blower in BLDC Sensored and Sensorless mode changing all the parameters but the recognition always fails, while with other motors it works.

Using the blower in BLDC Sensorless mode with the parameters obtained from another motor the blower can reach about 66000 Erpm and the VESC doesn't stop it.

Another problem is that using another Sensorless ESC type TRIXX Blue Line 85A (8Khz switching) the motor goes up to 96000 Erpm, how come this VESC can't make it run that fast? I also tried to unlock the duty cycle up to 99% but it doesn't reach those speeds.

What does it depend on in your opinion?

I link the graphs of the VESC TOOL tool and the motor datasheet:

 

https://ibb.co/nk71QP7

https://ibb.co/k4C07Bf

https://ibb.co/yFGcgJc

https://ibb.co/wzvDgdc

https://www.mouser.it/datasheet/2/632/BFN0724SS-01-1602120.pdf

 

Thank you very much for your help!!