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Old Aug 08, 2003, 05:04 AM
homo ludens modellisticus
Ron van Sommeren's Avatar
near Nijmegen, Netherlands
Joined Feb 2001
10,155 Posts
FAQ
seven diy brushless ESC designs

For a compilation of brushed diy ESC designs have a look at this thread:
http://www.rcgroups.com/forums/showt...hreadid=157193


Please report dead links.

Books/theory
  1. http://www.amazon.com/exec/obidos/AS...ectronicformod
  2. An online course on magnetism/flux, motors and ESC's
    http://www.consult-g2.com/course.html
  3. http://www.innovatia.com/
    http://www.innovatia.com/Design_Cent...lectronics.htm
Sensored
  1. http://homepages.paradise.net.nz/bhabbott/sensored.html
Sensorless
  1. OSMC project kits:
    www.robotpower.com
    Discussion group:
    www.yahoogroups.com/group/osmc
  2. Discussion groups
    http://groups.yahoo.com/group/osmc/
    -> files section
    http://mailman.evtech.org/mailman/listinfo/evtech
  3. Development discussion
    http://www.rcgroups.com/forums/showthread.php?t=200567 (very active and excellent)
    http://www.rcgroups.com/forums/showt...1&page=2&pp=10
    http://www.rclineforum.de/forum/thre...did=48225&sid= (very good too, 0.45gr brushless controller)
    http://www.rcgroups.com/forums/showt...hreadid=168476
    http://www.rcgroups.com/forums/showt...hreadid=181247
    http://www.rcgroups.com/forums/showthread.php?t=200567
  4. This design one we all know, Jo Aichingers family of Speedy-BL controllers. Sadly, Jo passed away in april 2006, I don't know if any one else does the firmware IC programming now, maybe Thomas Radetzki? ???
    http://www.speedy-bl.com/
    http://www.radetzki.info/html/sbl_micro_e.html
    http://www.ele.tut.fi/~peni/speedy_s...dy_sprint.html
    http://www.aerodesign.de/peter/2001/...DY-BL_eng.html
    'Mass' production
    http://users.cybercity.dk/~ccc16084/
    -> electronic page
    -> Brushless Speed Controllers
  5. http://plaza29.mbn.or.jp/~sgl02777/ (English/Japanese)
    http://www.rcgroups.com/forums/showt...threadid=70373
  6. http://gb97816.bei.t-online.de/ (German)
    -> projekte
  7. http://www.2mslbldc.g4g-server.com/
  8. A group design
    http://www.bldc.de (German/English)
  9. Rod Hower's design
    http://www.rcgroups.com/forums/showt...41#post1838041
  10. Quote:
    Open Source Firmware for ATmega-based Brushless ESCs. This tree contains Atmel AVR assembly code for ATmega-based 3-phase sensor-less motor electronic speed control (ESC) boards ...
    Based on Bernard Konze'sin the next item
    github.com/sim-/tgy
    in combination with this active development thread
    www.rcgroups.com/forums/showthread.php?t=1513678
  11. Bernard Konze
    home.versanet.de/~b-konze/
    (English & German)
    www.turbinemuseum.de/Modellbau/BLMC__UK_/blmc__uk_.html (English)
    people.freenet.de/khruehlow/
  12. Takao Shimizu's design, source code and schematics
    http://www.rcgroups.com/forums/showp...&postcount=153
  13. TVE
    http://www.hanfordsite.com/
  14. French diy sites
    http://frederic.brame.free.fr/variat...0brushless.htm
    http://www.silicium628.fr/
    -> electronique
  15. Ezone diy electronics subforum
    http://www.rcgroups.com/forums/forumdisplay.php?f=199
  16. 'Elektor' magazine design (also published in it's French, German, Dutch and Italian pendants)
    http://www.elektor-electronics.co.uk...ProductID=2721
    -> 'Brushless Motor Controller'
  17. For underwater robot
    http://aquaticus.info/bldc_controller
    http://groups.yahoo.com/group/lrk-to.../message/10239
  18. http://jetcontrol.de/Bastelstube/d2pack.html
  19. micro motor controller
    http://www.rcgroups.com/forums/showthread.php?t=261316
  20. 1.57gr brushless controller
    http://home.foni.net/~c-schlabitz/Floh/
    http://home.versanet.de/%7Eb-konze/blmc_flea/blmc.htm
  21. Wiki
    http://bldc.wikidot.com/
  22. with reverse
    http://www.rcgroups.com/forums/showt...14#post8056614
  23. Demo's and tutorials on www.freescale.com, e.g.
    http://www.freescale.com/files/micro...orbldctut.html
  24. high voltage
    http://rmmx.gmxhome.de/bldchv/english/start.html
  25. Brushless controller/timer for Control Line:
    http://www.pek.nu/pekproj/proj/el/sc/
    Discussion:
    http://www.svensktmodellflyg.se/foru...entMainTopic=2
Vriendelijke groeten Ron
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Old Aug 08, 2003, 08:52 AM
Regiztered Uzer
Markz's Avatar
Quebec, Canada
Joined Feb 2001
472 Posts
Thanks Ron

I've always been contemplating a challenge like this. This is a great compilation of designs - too bad I can't read german, but I'll see what the web translators can come up with

Marc
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Old Aug 08, 2003, 10:32 AM
Impossible? Hah!
KreAture's Avatar
Oslo Fornebu, Norway
Joined Jun 2003
3,074 Posts
Mine will be very much like number 4 I think.
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Old Sep 18, 2003, 09:37 AM
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Mark Sanders's Avatar
Windsor, UK
Joined Jun 2001
299 Posts
Thanks Ron - keep up the good work / mark
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Old Oct 20, 2003, 04:45 AM
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Mr DIY's Avatar
South Africa
Joined Aug 2003
587 Posts
Continuing on with Brushless designs, I am close to finalizing mine and have progressed to my second PCB version that now incorporates the sensor circuitry. I have managed to get a HD motor running without a problem, but when I attempted my Mega motor, I promptly burned out the high side FETs. There seems to be limited information relating to the method of drive and I do not have a commercial one at my disposal that would answer all my questions.

Now this may sound like a very stupid question to those that know, but what I need to know is … when starting the motor, a PWM signal is applied. But once up and running, then what? Is the PWM discarded and short pulses triggered at the start of each new phase? In other words, fire the “controlled” pulse, which accelerates the motor, and then wait for “crossing” feedback whilst motor decelerates. The controlled pulse width then determines the final speed. Is this the way it is done, or is the PWM signal being used all the time? I am finding that an extended duration PWM signal is the cause of my FETs going bang. They are being driven via a FET driver IC.

My controller at present is an overkill as far as the digital stuff goes. Wanted to play with a logic device, so added it in order to make controller more flexible and allow very high speeds. Will post pic as soon as I get a motor running.
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Old Jan 06, 2004, 08:05 PM
Registered User
Tokyo, Japan
Joined Nov 2002
834 Posts
Too slow detection and starting

Mr DIY,

>wait for “crossing” feedback

You must wait the feed back signal for next switch to start and run, for sure.
So far, My new program generates "preset duty" drive phase signal applying sequently until next 1/2Vcc cross signal detection, under no information of magnet rotor position.

http://www.rcgroups.com/forums/showt...89#post1676789

Also, "Too slow condition" as over load can be detected while running by timer. This condition is also caused at starting.Then,my program has no-output timer as starting duty control when the system does not start.

FET works CD-ROM RC motor, because of the coil winding wire is not so thick as low resistance compared to RDS(On):On Resistance between Drain and Source. FET does not heat up at all on my winding.

The problem is "preset duty" setting value to protect FETs when the motor coil is wound with very a few turns and with very low registance thick wire.

You may sense the starting rush current by RDS(On) on FET or one of current sense hall device on power line by A/D for best solution.
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Old Jan 06, 2004, 08:34 PM
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Pittsburgh, PA
Joined Jan 2002
1,271 Posts
Quote:
Originally posted by Markz
Thanks Ron

I've always been contemplating a challenge like this. This is a great compilation of designs - too bad I can't read german, but I'll see what the web translators can come up with

Marc
This site will translate words, phrases, and even URLs: http://babel.altavista.com/translate.dyn
I use it a lot
-Mike
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Old Jan 07, 2004, 04:32 PM
homo ludens modellisticus
Ron van Sommeren's Avatar
near Nijmegen, Netherlands
Joined Feb 2001
10,155 Posts
Or
http://www.google.com/language_tools?hl=en
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Old Jan 07, 2004, 05:34 PM
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Pittsburgh, PA
Joined Jan 2002
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Thanks Ron, I've bookmarked that one too.
-Mike
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Old Jan 08, 2004, 09:20 AM
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London Heathrow, Great Britain (UK)
Joined Sep 2001
314 Posts
Sensored Design

Hi,

I am looking for a sensored design. I want to use the hall sensors on the CD board I have. Surely this can't be too difficult ??

Anyone have any ideas ?

Thanks
Tim
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Old Jan 08, 2004, 07:05 PM
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Pittsburgh, PA
Joined Jan 2002
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Sensorless is simpler than sensor type, parts-wise that is
-Mike
edit: Posted after Takao's post to clarify it. Which he deleted and re-posted. Maybe I should delete this as it is confusing.
BTW, controller software is much easier w/ a sensored motor.
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Old Jan 08, 2004, 07:07 PM
Registered User
Tokyo, Japan
Joined Nov 2002
834 Posts
Re: Sensored Design

Tim,

Sensored type is useful to get the starting torque for RC car application.

Sensore less circuit is simpler than sensored type.

Takao
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Old Jan 09, 2004, 03:20 AM
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London Heathrow, Great Britain (UK)
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314 Posts
this is very complex,

I was hoping it would be easy like the circuit for the 2-phase motor in http://www.rcmicroflight.com/library/motor1.asp . Incidently would a 2 phase motor be powerful enough for RC - the controller is certainly simple !

Thanks
Tim
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Old Jan 09, 2004, 03:30 AM
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Tokyo, Japan
Joined Nov 2002
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Tim,

This is my simplest flying single phase motor.

http://www.rcgroups.com/forums/showt...518#post594518

Takao
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Old Jan 15, 2004, 06:42 PM
homo ludens modellisticus
Ron van Sommeren's Avatar
near Nijmegen, Netherlands
Joined Feb 2001
10,155 Posts
Added development discussions:
http://www.rcgroups.com/forums/showt...hreadid=168476
http://www.rcgroups.com/forums/showt...hreadid=181247
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