BECKHOFF AL2000 Application - Manual (Page 12)

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Servo-controller
The position information as well as the current in the coils is fed back to a servocontroller. Here the information
is processed and translated into a proper inputsignal for the linear motor. Because the linear motor needs a
powerful input the signal is provided by a servo-amplifier.
The slide’s movement is directed by a three phase voltage pulse to the coil unit. The phase depends on the
actual and the desired position of the slide. Hereby the motion’s directing quantity is the pulse width. In fact the
servo-amplifier is a pulse width modulation amplifier with a fixed voltage and a fixed switching frequency.
AL2000 linear motors can ideally be combined with our servo-controller series AX2000. With prepared motor-,
feedback- and thermal protection cables we offer a complete and flexible linear motor system.