《PF700 变频器张力控制》.pdfVIP

PF700VC APP for Tension Control July 24, 2008 Lei wang 3M Internal Use Only Agenda • Section 1: Tension Control Basic • Section 2: Drive Basic for Tension • Section 3: PF700 Drive Basic Config. • Section 4: Common Starting Up • Section 5: CX9 Webline Overview Section 1: Tension Control Basic • What? – Tension is a down web force applied to the web measured in total pounds or PLI(lbs/linear/inch). • Why – Transport web through process without damage. – Web steering. – Wrinkle control. – Roll formation. How to Control Tension • Change draw ratio – speed control using tension fbk • Change force at ends – torque loops • Change length – dancer Typical Configuration • Load Cell Typical Configuration • Dancer Section 2: Drive Basic For Tension • Basic Schematics • Vector Control Drive Diagram • Features PowerFlex Family of Drives • Typical Tension Control Loops – Speed Trim Loop – Torque Loop – Dancer Position Loop – Diameter Calculation Basic Drive Schematics Basic Drive Software Diagram PowerFlex Family of Drives • Family Breadth and Depth • Flexible Human Interface Modules • Common Communications • Common Programming • Common Software Tools • Backwards Compatibility • Flexible design • Worldwide standards and ratings • Global packaging solutions PF700 Motor Control Method • Custom Volts/Hertz – Used in multi-motor or synchronous motor applications. • Fan/Pump Volts/Hertz – Used for centrifugal fan/pump (variable torque) installations for additional energy savings. • Sensorless Vector – Used for most general constant torque applications. Provides excellent starting, acceleration and running torque. • Flux Vector Control – Used in constant t