Issue with Sensorless BLDC motor using microcontroller

Hello guys,

I am in big trouble with sensorless BLDC motor project. I am trying to achieve the control of sensorless BLDC motor using microcontroller.

I am using renesas microcontroller. I am able to run the motor but not getting first start.

I am trying by sequence changing with particular delay but its not working.

Once I rotate motor with hand, the motor is starting and then control is through back EMF.

At back EMF stages the motor is working properly. I am worried about my project just because of start up issue.

Please guys help me with the code to start the initial rotations.

Seriously I am worried about my project.

Requesting you all to reply me.

Welcome to ETO, RenesasT.

Please provide, at the least, your controlling code.

And have you investigated this Renasas resource? Scroll down for example code downloads.

Guys, the TS now has his motor running. This topic has been discussed .

Hello Guys,

I am able to drive the motor initially. But the thing is that, I am not getting the torque.

Please suggest me.

I am in big trouble.

RenesasT said:

I am worried about my project just because of start up issue.

Click to expand...

RenesasT said:

I am able to drive the motor initially. But the thing is that, I am not getting the torque

Click to expand...

Make your mind up!!! I just seems that this is homework, and you have nothing!! You give no indication of which language! "renesas microcontroller" isn't a lot to go on!!! If you need help, you need to re-read Cowboy Bob's post and help us by posting what you have.... As I said.. I should imagine you have nothing at the moment!!