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« on: May 16, 2012, 04:50:35 PM »
mubarakmohd123
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Respected members

Thanks for your kind help in making the motor.

Now i want to test it with a bldc driver. I have a circuit done, but not working. The circuit is given below. However in this circuit the vcc pin (16) and ground pin(Cool is not used.  

1.jpg
DIY Brushless ESC/ BLDC driver
* 1.jpg (45.1 KB, 705x528 - viewed 19049 times.)
« Last Edit: May 16, 2012, 05:22:52 PM by iamahuman » Logged
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« Reply #1 on: May 21, 2012, 10:46:21 PM »
pradeep_K_B
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Do u know any good circuits for brushless ESC?
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« Reply #2 on: May 21, 2012, 11:16:00 PM »
KALYANPRODHAN
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Information sharing improves knowledge of both.
Please note that voltage is not the only thing. You have to check the current value too. And the ON-state resistance also for those transistor.
So, theb circuit may rotate any tiny Motor whose no-load current is  < 0.15 A, and of course, with no-load condition.
So, you need MOS or IGBT or even Power Transistor (buffered with Darlington / Zikli pair) bridge as switch.
Just search the forum and you will get Application note.
http://www.rcindia.org/electric-power/diy-brushed-esc/msg97943/#msg97943
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« Reply #3 on: May 21, 2012, 11:27:06 PM »
pradeep_K_B
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then is that schematic is OK?Huh?....just wanna change the components only....or wanna change the whole circuit???
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« Reply #4 on: May 22, 2012, 12:40:52 AM »
KALYANPRODHAN
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you have to match full throttle generated frequency with voltage * KV considering the no of pole of the motor.

Just read any AC Machine chapter for referance for 3 phase Synchronous motor.

Thanks
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« Reply #5 on: May 22, 2012, 12:30:07 PM »
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pradeep,
thic cct does'nt look ok/ complete.
Generally, in sensorless brushless motors, the Back emf generated  from the coil is given to an  A to D (analog to Digital converter) and is used as feed back to synchronise the switching of the three pase of the motor.
This portion is missing in the given cct. So i wonder if it will work for u.
Cheap brushless motor controllers are available for as low as rs 500.00 and may be a good option.
ashta


Quote from: pradeep_K_B on May 21, 2012, 11:27:06 PM
then is that schematic is OK?Huh?....just wanna change the components only....or wanna change the whole circuit???
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« Reply #6 on: May 22, 2012, 06:11:38 PM »
mubarakmohd123
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Thanks kalyan ji, you are absolutely right, this wont take a nice motor.

Here is my video

« Last Edit: May 22, 2012, 06:46:52 PM by mubarakmohd123 » Logged
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« Reply #7 on: May 26, 2012, 06:45:43 AM »
mubarakmohd123
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Is tip31c = 2n3055

I am having a couple of 3055.

video:

$$$$$$$$$$$$$$$$$$$ king.jpg
Re: DIY Brushless ESC/ BLDC driver
* $$$$$$$$$$$$$$$$$$$ king.jpg (47.18 KB, 800x640 - viewed 5800 times.)
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