Issue with Sensorless BLDC motor using microcontroller

[RenesasT]

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.

 

[cowboybob]

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.

 

[alec_t]

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

 

[RenesasT]

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.

 

[Ian Rogers]

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

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

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!!