AC PM Servo Drive Amplifiers: Different Servo Motor Phase and Commutation Alignments

January 26, 2026
TwinSpin® high-precision backlash-free cycloidal reduction gearboxes

The issues with commutation alignment between servo motors and servo drives, especially when the motor and drive are from different manufacturers, can be quite challenging. Understanding typical design challenges can help you tackle motor phase-sequencing issues.

We will start by identifying or confirming the servo motor’s leads. Then we will move to identifying the specific leads of the phases for a new drive, one in which firmware function labels have not been verified to the outside world. This method will allow us to go through a series of questions to better understand the basic issues of commutation alignment.

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