On 09/14/2017 02:33 PM, Nicklas Karlsson wrote:
On 08/24/2017 09:26 AM, Nicklas Karlsson wrote:
I also have Yaskawa drives and motors but planned to replace drive. Encoder is
three quadrature signal which is a little bit odd, third usually is zero. I
have no time read are comment anything for a day or two.
I think the scheme (I had some of the old Yaskawa ServPack
drives and motors once) is the C channel looks like A and B,
but the phase relationship between them tells what
electrical quadrant you are in. So, immediately on
power-up, the drive knows which coils to drive to move the
motor.
They are BLDC motors?
Yes, all the Yaskawa ServoPack motors are 3-phase permanent
magnet motors with integral encoders.
I hate the term BLDC, as they are not DC motors. But, some
people call them that.
Jon
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