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Old Dec 11, 2003, 06:45 PM
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billystiltner's Avatar
United States, VA, Clintwood
Joined Nov 2002
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Bob that is a very cool looking motor there.
Reckon if you used 3 coils it would dly a plane?

Billy
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Old Dec 11, 2003, 09:56 PM
It's a spiderweb of knit lines
Souderton Pa. USA
Joined Mar 2002
2,649 Posts
All
I haven't been able to get the controller working yet, probably my fault. But I did check the 6mm motor to see if it would trigger a Hall and it does, at least it triggers the hall I'm using for an RPM meter. You all should understand that I'm just making an on-off controller, no throttle control, no BEC, no nothin' but on-off for 1 Li-poly.

Bob
How did you get the hole in the magnet?

Mike
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Old Dec 12, 2003, 09:28 AM
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North Texas
Joined Nov 2002
1,287 Posts
I am currently doing a design that uses an ATTINY micro and discrete MOSFETS. If there is interest, I should be ordering PCB's in the early part of the year. The good thing about discrete FET's is that you can replace them with better ones as they become available. The board as designed should be able to handle 3 amps/phase. The baord will be able to handle 3 or 4 phase motors(steppers). Let me know if yiu are interested.
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Old Dec 12, 2003, 11:47 AM
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bselman's Avatar
sw missouri
Joined Sep 2001
397 Posts
Billy,

I don't know about 3 coils. The circuit I came up with is single phase but I was going to lower the coil resistance and add a second coil at 180 degrees. A speed control would be fairly easy to do by putting a PIC between the HE and the H bridge to change the timing according to the input pulse from the receiver.

Mike,

The magnet came from an early Ruijsink actuator. Our Plug n Play actuator has a large magnet with a hole in it too.

Bob
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Old Dec 12, 2003, 08:30 PM
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QLD, Australia
Joined Sep 2003
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Bob,
to use 2-3 or more coils you just need to have the same no of control circuits ie 1 for each coil , can you post your circuit ?
as we are looking at a similar system to try on the small b/l motors driven from a standard brushed controler .
Stewart
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Old Dec 13, 2003, 06:18 PM
It's a spiderweb of knit lines
Souderton Pa. USA
Joined Mar 2002
2,649 Posts
It works

I finally have a working controller based on the Philips 5144 chip. I still need to add a DC-DC so it will run on a single Li-Poly. I have a Micro Chip DC-DC I'll add to the back of this board. As it is now it weights 1.6 grams without wires. Remember that this is for a bit radio so there is no throttle or BEC.
Mike
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Old Dec 13, 2003, 08:57 PM
Foam rules
Thatovalguy's Avatar
HdG Md.
Joined Jan 2003
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Really nice job. Now got to come up with a really small motor.
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Old Dec 13, 2003, 09:06 PM
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QLD, Australia
Joined Sep 2003
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Mike,
Do you have circuit details , component values that you used ?
any tips from your experiance on getting the chip going with dif motors ?
Stewart
Oh and - congrats Mike , nice job on the board
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Last edited by clipclop; Dec 13, 2003 at 09:09 PM.
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Old Dec 14, 2003, 02:03 AM
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Koichi Tanaka's Avatar
Japan
Joined Dec 2002
327 Posts
The test of a micro motor and a controller was begun. PIC12F629 are used for the controller. It only checked rotating. PWM control cannot be performed yet.

Koichi
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Old Dec 14, 2003, 03:51 AM
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QLD, Australia
Joined Sep 2003
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Koichi,
Great work, glad you too are working on a brushless solution
Stewart
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Old Dec 14, 2003, 06:58 AM
It's a spiderweb of knit lines
Souderton Pa. USA
Joined Mar 2002
2,649 Posts
Koichi
Very cool! It looks like it's a lot simpler than the motor I made so it should be a lot lighter. It also looks like it would be very easy to build.
Very good work!
Mike
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Old Dec 14, 2003, 12:37 PM
Foam rules
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HdG Md.
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Now I love that motor.
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Old Dec 15, 2003, 11:44 AM
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bselman's Avatar
sw missouri
Joined Sep 2001
397 Posts
BL Controller

Here is the schematic for my little single phase motor. The original did not have the PIC in the circuit. This was the "next step" that I never took. The HE just drove the H bridge in the working unit shown above.

Bob
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Old Dec 15, 2003, 11:47 AM
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sw missouri
Joined Sep 2001
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I got bit by the "picture too big" bug. As I kept shrinking it, some of the lines went away. I'll see if I can reformat it and submit again.

Bob
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Old Dec 15, 2003, 12:07 PM
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sw missouri
Joined Sep 2001
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I ZIPPED it

Here is the schematic in a zip file.

Bob
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