Servoamplifier applies DSP-based technology to simplify system set-up and commissioning while also enhancing the motor's electrical, mechanical and thermal capabilities
Copley Motion Systems has launched an all-digital servoamplifier designed to raise the standard of brush motors to that of more sophisticated, but significantly more expensive, brushless solutions.
The Junus servoamplifier applies DSP-based technology to simplify system set-up and commissioning while also enhancing the motor's electrical, mechanical and thermal capabilities. Used in conjunction with Copley's CD-based CME2T software, the Junus utilises user-invoked algorithms to fully automate brush motor current loop tuning, thus eliminating all conventional manually-adjusted potentiometers and interconnection jumpers.
The powerful and intuitive Java-based software uses on-screen prompts to allow detailed tuning adjustments to be implemented.
Final system parameters can be stored in the Junus' non-volatile Flash memory, and CME2 is compatible with a wide range of the most popular multi-station and PLC controllers.
Due to the Junus's DSP-based operation, motor drive functions can be created digitally rather than using the hardware-based circuitry required in analog servoamplifiers.
This leads directly to a wide array of motor drive functions in a smaller and cheaper package.
Critical for precision positioning, zero crossing linearity is eliminated, while the Junus' carrier cancellation modulation is notable for the mathematically lowest ripple of all modulation techniques.
This is particularly important for sensitive voice coil actuators.
The Junus servoamplifier also offers a low cost IR-compensated velocity control technique that obviates the need for speed feedback from a motor-driven tacho, thus cut the system cost and reducing load inertia.
A highly accurate I2?t motor energy monitoring system allows high drive operation to be sustained by continuously measuring the true thermal status of the motor and allowing its protection circuits to be calibrated on the safe side of known thermal limits.
In addition, the versatility of the software employed in the Junus means that it can accept a wide range of analog and digital input commands and operating modes.
