Electric RC Jets Discuss rc electric ducted fan or radio control prop jets here.

ESC settings for EDF jets?

Reply

Old 05-04-2019, 12:08 AM
  #1  
MurrayD
Thread Starter
 
Join Date: May 2010
Location: Surfers Paradise, AUSTRALIA
Posts: 4
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default ESC settings for EDF jets?

I have an original eflight smaller grey foam Habu with the standard ducted fan. The ESC has been cooked by the previous owner. I have bought a 90 Amp Castle creations Talon ESC. ( I know it only needs a 60 amp) Setup is 6s. What mhz and timing settings are required? I gather they are not the default settings as the ESC gets hot quickly! Thanks for your help! Regards Murray
MurrayD is offline  
Reply With Quote
Old 05-04-2019, 12:10 AM
  #2  
MurrayD
Thread Starter
 
Join Date: May 2010
Location: Surfers Paradise, AUSTRALIA
Posts: 4
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Sorry its 4s not 6s
MurrayD is offline  
Reply With Quote
Old 05-16-2019, 04:39 AM
  #3  
Extreme_RC
 
Extreme_RC's Avatar
 
Join Date: Oct 2008
Location: , AUSTRALIA
Posts: 422
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Timing should be low, or if it has actual degrees settings 3-5 degrees will be safe enough. PWM is only useful up to 12khz for most motors as 99% of the motors we use are iron core, raising PWM will not increase performance, only make the ESC run hotter. Make sure the brake is off, set your cutoff voltage to 3.3v minium per cell. 3.4v is better with many of todays hi power lipos.
ESC can be 120A it wont matter if it has no airflow, it will still be susceptible to overheating. Make sure you have airflow over the heatsink.
Extreme_RC is offline  
Reply With Quote
Old 05-17-2019, 03:45 PM
  #4  
Joseph Frost
 
Join Date: Nov 2010
Location: Coffs Harbour NSW, AUSTRALIA
Posts: 414
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Originally Posted by MurrayD View Post
I have an original eflight smaller grey foam Habu with the standard ducted fan. The ESC has been cooked by the previous owner. I have bought a 90 Amp Castle creations Talon ESC. ( I know it only needs a 60 amp) Setup is 6s. What mhz and timing settings are required? I gather they are not the default settings as the ESC gets hot quickly! Thanks for your help! Regards Murray
On the long term you are better off setting the timing and frequency low, remove as much of plastic covering as you can from the unit for better heat displacement, I often ad extra cooling plates (heat sink) to my ESCs for long life. Easy fix.
I have lot of fun with my Eflite "Habu", rather heavy model but moves nicely after lot of mods. (pics)

Got this one fully set up for a song, 200 bux OZ.


Perfect strip.


Caught in action.
Joseph Frost is offline  
Reply With Quote
Old 05-27-2019, 04:02 PM
  #5  
Extreme_RC
 
Extreme_RC's Avatar
 
Join Date: Oct 2008
Location: , AUSTRALIA
Posts: 422
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Don't just set everything to low, ESC's do not work that way, they are trapezoidal wave generators, that is they control the motor with frequency. If you want to work out your PWM accurately, multiply the number of poles of your motor by the RPM it is running at and divide the total by 20. For example a 4 pole motor running at 40,000rpm has a commutation frequency of 8000, or 8Khz. If you had an 8 pole motor then the commutation frequency would double to 16Khz. As long as the frequency is close to the ESC's settings you will be fine.

Your Eflite fan will be running around 42-44K rpm and the motor is a 6 pole 3200Kv inrunner yes? This would give you a comm frequency of around 12-13Khz, so running at 12Khz will be fine, I would not go higher though as you risk generating more heat in the ESC.
Extreme_RC is offline  
Reply With Quote
Old 05-29-2019, 01:01 AM
  #6  
Joseph Frost
 
Join Date: Nov 2010
Location: Coffs Harbour NSW, AUSTRALIA
Posts: 414
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default



Bit of days variety, combine logged flight time with these 6 models is well over 3500, 3-7 minute sessions over last 9 years.
Just back from another great flying trip with some variety of models, all programmed to low timing and PWM Freq.
Joseph Frost is offline  
Reply With Quote

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service