Posted to News on 2nd Jan 2008, 21:09
Digital DC drives offer range of options and interfaces
Gefran's SieiDrive TPD32 digital DC drives combine a wide range of power ratings and an integrated field regulator for maximum flexibility with optimal control and efficiency. A comprehensive selection of optional functions, fieldbus interfaces and application packages is available to provide a competitive and modular high-performance drive system for demanding industrial speed and position control applications.
Automation applications covered by the CE-, UL- and cUL-approved range includes conveyor drives, converting and extruding machinery, machine tools, packaging machinery, wire drawing, punch presses and rolling mills.
The SieiDrive TPD32 range is available in 30 standard models in two- and four-quadrant versions with three-phase line voltage ratings of 230, 400, 500 and 690V AC. Self-contained IP20 standard compact enclosures are available for current ratings from 20-1050A and higher power IP00 versions with an external bridge provide ratings from 1200-3300A. The integrated field regulator uses a single-phase supply with current rating to suit the DC drive and motor type. Optional filters are available for full compliance with EN 61800-3:2004.
A wide complement of built-in analogue and digital I/O is available for machine interfacing, and protection includes a motor thermistor input and relay outputs. Speed feedback options include tachogenerator and/or digital or sinusoidal encoders. The range includes advanced features to aid straightforward integration into customers' applications. These include autotuning speed and current loops, independent programmable linear and S-curve ramping, minimum and maximum speed regulation, programmable multispeeds, current limit linked to speed, adaptive gains and many more.
Functions and options
Special functions available include: 'Speed draw', where a configurable speed ratio in a multiple drive system can be applied to a main speed reference; the 'Auto capture' function enables the drive to engage smoothly to a running motor for a flying restart; and the 'Droop' function is used to precisely balance the current between two drives that are connected to two mechanically coupled motors.
Options available include a separate and detachable programming keypad, I/O expansion cards and a wide selection of fieldbus interfaces including Profibus, DeviceNet, CANopen, and InterBus S. A range of programmable application cards with predefined library functions provides a choice of advanced applications including full electronic line shaft control, wind/unwind control with torque in open- or closed-loop for loadcell input, and a single-axis positioning module with up to 64 preset position registers with absolute encoder support via an optional interface.
Gefran's EasyDrive PC configuration software enables users to set-up, diagnose and program the SieiDrive TPD32 digital DC drive in a graphical environment with advanced time-saving features that include parameter setting via tree structured menus, wizard-guided programming, graphical variables display with trend recorder and oscilloscope function, and multi-drop network management for up to 32 drives.
