Rockwell Automation WebPak 3000 DC Drive Application Workbook Version 1.1 - Manual (Page 80)

A-2 WebPak 3000 Drive Application Workbook, Version 1.1
The digital drives applied to these sections are configured as closed-loop speed,
current, position, or tension regulators. The section regulator designs have varying
levels of complexity dependent on process dynamics and mechanical design. The
WebPak 3000 drive is capable of supporting these regulator requirements within the
specified design limits.
A.1 WebPak 3000 Drive Design Features
The design features of the WebPak 3000 drive provide the capability to configure
closed-loop regulator solutions for most web-handling drive applications.
Preconfigured regulator software blocks with accessible tuning parameters simplify
the configuration and setup process
.
A.1.1 Features Supporting Constant Diameter Sections
For a process line section with fixed diameter-driven rolls, such as pull rolls,
laminators, coaters, and extruders, the WebPak 3000 drive’s closed-loop regulator
capabilities are supported by the following attributes:
• High performance self-tuning current minor loop
• High performance self-tuning speed loop
• Configurable current regulator
• Configurable position regulator
• Configurable tension regulator
• Friction and windage loss compensation
• Constant torque and/or constant horsepower operation
• Analog or digital speed feedback
• Regenerative armature power bridge
A.1.2 Features Supporting Variable Diameter Sections
For a process line with variable diameter driven rolls, such as unwinds and winders,
the WebPak 3000 drive’s closed-loop regulator capabilities are supported by the same
attributes listed for constant diameter sections (section A.1.1) plus the following:
• Diameter calculator (ratio detector)
• Inertia compensation
• Motor field current regulator
• Gain profiling
• Taper tension