With an orientation toward full solutions that are highly integrated, cost effective and have a minimum footprint, servo controllers are finding their way into a new generation of drive-motors. These integrated motor-drive-controller products cover a range of power and technology capabilities while offering innovative approaches for integrating controls into a variety of automation systems. Most of these products are primarily oriented toward the control of the motor, but also include general purpose I/O and a variety of practical options like brake control and safety functions. In addition to saving electrical control cabinet space, complex interfaces are absorbed, lowering both engineering and installation cost while improving reliability and maintainability.
Elau Intelligent Servo Modules
To reduce cost and increase reliability, new Intelligent Servo Modules from Elau (www.elau.com) take a new approach to packaging machine design. The system uses a centralized power supply with a single hybrid cable and interconnections to provide the motion bus, power, brake control, I/O signals and safety functions for each servo module. Separate encoder cables and I/O bus wiring are eliminated, along with the potential for a single point of failure found in ring or daisy-chained actuator networks. The shared power supply minimizes cost, as well as size and heat dissipation for each motor package. The modules are IP 65 rated and can be mixed and matched with SH Series servo motors and MC-4 digital servo drives.
The SM2315DT SmartMotor from Animatics (www.animatics.com) features a new 8-pole compact rotor design with higher copper filling factor. Compared to conventional techniques, the new design achieves a higher energy density as well as better efficiency that results in more torque capacity in the same physical package size. Using a patented design, the SmartMotors incorporate a servo motor, amplifier and motion controller in the same integral frame. Similar to other members of Animaticís OEM Series of SmartMotors, the SM2315DT provides low cost plus high continuous and peak output torques. Housed in a NEMA 23 frame, it delivers up to 112 oz-in of peak torque while maintaining as much as 57 oz-in of continuous torque, with a maximum speed capability of 4700 rpm.
AMK Integrated Servo Drive Solution
The AMKASMART IDT (www.amkdrives.com) is a combination of a torque motor with integral servo controller and phase-angle sensor, resulting in a compact unit ready for quick installation. The digital microprocessor controller offers a comprehensive package with many advantages of a modern servo axis including torque, speed and position control, electronic gearing and braking management. It is available in three power ratings, and the motor can be supplied with an optional mechanical holding brake, gearbox and/or a multi-turn encoder. Using the ACC system bus based on CANopen, the unit is able to communicate with external control systems and other drives, providing architectural flexibility. It is positioned for use in a variety of stand-alone and multi-motor applications.