Editorial Contacts:
FOR IMMEDIATE RELEASE
Lisa Wade, Galil Motion Control
650-967-1700, lisaw@galilmc.com
Patty Garrison, McMullen Advertising, Inc.
650-494-8181, patty@mcmullenad.com
SINUSOIDAL COMMUTATION NOW STANDARD WITH
GALIL'S DMC-1600 & DMC-1700 CONTROLLERS
Controllers Take Command of Signals Enabling Cost-Effective
Solution For Brushless Motors
MOUNTAIN VIEW, Calif., March 11, 1998 --
leader of digital motion control technology, today announced that their DMC-1600
Compact PCI Bus and DMC-1700 ISA Bus controllers now include sinusoidal
commutation for brushless motors as a standard feature. This enables the controller to
generate current command signals, allowing for the use of low-cost amplifiers.
Sinusoidal commutation controls the motor in a manner that minimizes the power
dissipation in the motor. Another advantage of this method is that the output signals vary
gradually resulting in smoother motion, especially when applied to linear motors.
"Sinusoidal commutation promises to be a cost-effective method for controlling
brushless motors for high-precision applications," said Lisa Wade, vice president of
sales and marketing at Galil Motion Control. "Soon, everyone will be cutting costs by
using a motion controller that is inherently more precise than expensive amplifiers."
In the sinusoidal commutated system, the main control loop is like a conventional
servo system in that the closed loop compares the reference position with the feedback
to form the position error. Compensation filter produces the signal, which represents the
required torque for acceleration. Unlike conventional systems that apply the signal to the
amplifier, a sinusoidally commutated system generates two current command signals
that are shifted by 120°. The two signals are applied to an amplifier that generates
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