Stall protection?
Posted: Thu Jul 07, 2016 1:40 pm
Hi,
I just got 10 ESC32 V3, to build an X-8.
I love all the features, and look forward to using Can in the future, and the feedback. And I’m happy to have a esc with mounting holes.
I flew with BLheli esc’s and after swapping them with these it still flew stable even before extra tuning, Esc's stayed cold.
But I had some vibration problems, causing a prop to hit the ground during landing. It was on concrete and would be able spin a moment later but it was not spinning, and very quickly after that the flight computer gave the command to stop, but the smoke was already coming out of the ESC. (A fet burned.)
Is there a protection build in to prevent this?
On BLheli they have “Stall protection” and “low RPM power protection” I’m not sure why they are less prone to this type of failing (at least for me), but if it’s one of these features, maybe they can be implemented.
If it’s very likely to burn a ESC every time you tip over on landing, it would be reason to switch back to ESC’s that don’t have that problem for me.
If you say It’s unlikely then I’ll throw a towel on a slowly spinning prop to see what happens.
Or if I should try it with different settings, I would like to do that.
My setup:
T-motor 4014-11
16" APC - MR
6S 20.000
No heatsink on ESC32
1X the supplied 330uf 35v capacitor
ESC settings:
ACTIVE_FREEWHEEL 1
ADVANCE 15
AUDIO_VOLUME 0
BAD_DETECTS_DISARM 32
BAUD_RATE 230400
DIRECTION 1
ESC_ID 1
FF1TERM 1.89563e-07
FF2TERM 0.0027018
GOOD_DETECTS_START 48
ITERM 0.005
MAX_CURRENT 20
MAX_PERIOD 12000
MIN_PERIOD 50
MOTOR_POLES 24
PTERM 0.5
PWM_HI_VALUE 2000
PWM_LO_VALUE 1010
PWM_MAX_PERIOD 25000
PWM_MAX_VALUE 2250
PWM_MIN_PERIOD 2000
PWM_MIN_START 1010
PWM_MIN_VALUE 950
PWM_RPM_SCALE 5800
RPM_MEAS_LP 0.75
SERVO_D 0
SERVO_DUTY 5
SERVO_MAX_RATE 1000
SERVO_P 0.05
SERVO_SCALE 360
STARTUP_MODE 1
START_CURRENT 0.75
START_VOLTAGE 0.75
SWITCH_FREQ 20
THR1TERM 0
THR2TERM 1
I just got 10 ESC32 V3, to build an X-8.
I love all the features, and look forward to using Can in the future, and the feedback. And I’m happy to have a esc with mounting holes.
I flew with BLheli esc’s and after swapping them with these it still flew stable even before extra tuning, Esc's stayed cold.
But I had some vibration problems, causing a prop to hit the ground during landing. It was on concrete and would be able spin a moment later but it was not spinning, and very quickly after that the flight computer gave the command to stop, but the smoke was already coming out of the ESC. (A fet burned.)
Is there a protection build in to prevent this?
On BLheli they have “Stall protection” and “low RPM power protection” I’m not sure why they are less prone to this type of failing (at least for me), but if it’s one of these features, maybe they can be implemented.
If it’s very likely to burn a ESC every time you tip over on landing, it would be reason to switch back to ESC’s that don’t have that problem for me.
If you say It’s unlikely then I’ll throw a towel on a slowly spinning prop to see what happens.
Or if I should try it with different settings, I would like to do that.
My setup:
T-motor 4014-11
16" APC - MR
6S 20.000
No heatsink on ESC32
1X the supplied 330uf 35v capacitor
ESC settings:
ACTIVE_FREEWHEEL 1
ADVANCE 15
AUDIO_VOLUME 0
BAD_DETECTS_DISARM 32
BAUD_RATE 230400
DIRECTION 1
ESC_ID 1
FF1TERM 1.89563e-07
FF2TERM 0.0027018
GOOD_DETECTS_START 48
ITERM 0.005
MAX_CURRENT 20
MAX_PERIOD 12000
MIN_PERIOD 50
MOTOR_POLES 24
PTERM 0.5
PWM_HI_VALUE 2000
PWM_LO_VALUE 1010
PWM_MAX_PERIOD 25000
PWM_MAX_VALUE 2250
PWM_MIN_PERIOD 2000
PWM_MIN_START 1010
PWM_MIN_VALUE 950
PWM_RPM_SCALE 5800
RPM_MEAS_LP 0.75
SERVO_D 0
SERVO_DUTY 5
SERVO_MAX_RATE 1000
SERVO_P 0.05
SERVO_SCALE 360
STARTUP_MODE 1
START_CURRENT 0.75
START_VOLTAGE 0.75
SWITCH_FREQ 20
THR1TERM 0
THR2TERM 1