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The
Vx8++
drive controller performs all control functions commonly performed on
the logic board of an AC (or DC) servo drive amplifier. On a Vx8++
card, these functions are repeated eight times, once per axis. To better
visualize the functionality of a Vx8++
in a motion control system, it must be put in contrast with a common servo
amplifier. In a traditional system the position controller output goes
through a D to A converter. This analog voltage controls the torque or
velocity loop of a servo amplifier. The Vx8++
outputs its pwm and inhibit signals to a “power stage”. Functions such
as sinusoidal commutation, current loop, velocity loop, peak current limit
and the like are performed on the logic board of a servo amplifier. These
functions are collectively performed by a Vx8++,
eliminating the entire signal processing demand on the logic board of
a servo amplifier.
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