Control.com - Nerds in Control

Hi all,

Just a question about a rotative encoder used in my brushless motor.

What is the "sin-cos phase angle"? Maybe it's an angle between rotor and stator? How can I get this angle without moving the motor?

Thanks a lot!

Fabri

Hello,

Are you talking about phasing the motor to find commutation? Either you need Hall switches, an absolute encoder, or a manual phasing algorithm (usually built into motion control or drive) to commutate the motor.

~Ken

>Are you talking about phasing the motor
>to find commutation? <

I don't know. The motor moves and a sin-cos phase angle appears on my motion control browser. I think it's that you talk about.

>Either you need
>Hall switches, an absolute encoder, or
>a manual phasing algorithm (usually
>built into motion control or drive) to
>commutate the motor. <

Thanks!

Which format of output have your encoder? I.e. digital (A,B quad), analog (1V)... ??