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Old 10-14-2011, 09:59 AM   #1
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Join Date: Oct 2011
Location: Romania
Posts: 2
Default Homemade controller problem

Hello,

I built a ESC based on MC33035 IC.http://roboturk.googlecode.com/files/MC33035-D.PDF
The circuit is analogical with a input potentiometer for speed,brake pin, current sense pin,pwm optional pin,and an optional ic for loop control.
It has a hall sensor for reading the position of the rotor.
the circuit is working but not so well.
The motor is an outrunner Emax BL4030/10 with 12 poles and 14 magnets.
The problem is that it has pin 22 for selecting the 60 electrical degree or 120 electrical degree.
I set it initial at 60 degree and i tried all distances combination between the sensors ,not working well because it has a FAULT led that is stopping the motor if the sensor reading is not correct.
If i only leave a sensor the motor will spin but only if i spin with my hand at initial moment.
I tried also with 120 degree setting.Bot not running smooth only if i turn it with my hand and only if i use one sensor.
Here is an animation with order of all hall sensors .
4-POLE BRUSHLESS DC MOTOR ANIMATION

In the animation the sequence is 1 0 0
1 1 0
0 1 0
0 1 1
0 0 1
1 0 1

I never achieve this logic diagram with my sensors.
In my motor one sensor in piking only 2 consecutive logic 1 not tree.
Can anybody tell me what is the problem because i tried all the positions.
IN the animation diagram the motor is in-runner and the rotor has 4 poles.
This is my motor
https://picasaweb.google.com/1155468...lessController
There is a link with this working bout i do not know haw.

HXT modified with external hall sensors.wmv - YouTube
Can anybody help me?
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Old 11-06-2011, 01:20 PM   #2
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Join Date: Nov 2011
Location: Slovakia
Posts: 1
Default

Do not have a Hall sensor placed correctly, they should be placed over the magnets next to each other.

Last edited by enaxy; 11-06-2011 at 01:31 PM.
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