INVT GD350 + GD200A VFDs are suitable for super calenders, a type of specialty paper processing equipment. They meet various complex paper processing technologies, helping enterprises improve production efficiency, reduce costs and enhance effectiveness.
Paper is prone to fluctuation and breakage during speed changes.
Complex process with high adaptability requirements.
Slow shutdown easily causes material waste and paper rail damage.
High equipment cost.
High difficulty in commissioning and operation.
INVT adopts the high-performance GD350 series multifunctional VFD with tension PID function to control the unwinding and rewinding units, while the GD200A serves as the main drive.Equipped with tension sensors and added inertia reverse compensation, it ensures smoother paper running.
View Larger ImageDedicated unwinding mode + three groups of PID automatic tension control output, ensuring stable and rapid thin paper tension output.
Inertia reverse compensation enables stable operation even with a very small roll diameter.
Master-slave pulse following + tension feedback delivers excellent synchronization performance.
Real-time parameter monitoring via LCD keyboard for more convenient debugging.
High cost-performance, lower total costs.
Equipped with tension sensors and PID control for unwinding and rewinding, it maintains constant tension even for paper as thin as 17g/㎡ (single-ply toilet paper), reducing material waste.
Stepless speed startup from 0 to 480m/min; suitable for paper ranging from 80g/㎡ to 17g/㎡ and the post-process water spray humidification.
Lower overall equipment cost with outstanding cost-effectiveness.
With added inertia reverse compensation, paper transport is smoother even with small roll diameters or during acceleration and deceleration.
Precise roll diameter PID compensation enables rapid stopping, avoiding material waste and damage to the paper guide.
Main Drive Application for Paper Machines
For paper machine main drive applications, INVT adopts a PWM rectifier common DC bus multi-drive solution. Through precise speed and torque control, it ensures long-term reliable operation of the drive system from pulp processing to paper winding.
Rotary Drum Displacement Pulp Washer
To improve washing efficiency and reduce operation and maintenance costs, rotary drum displacement pulp washers have been widely recognized by pulp mills worldwide.INVT GD5000 Medium-Voltage VFDs empower pulp washers to achieve high efficiency, energy saving, precise speed control, and enhanced production efficiency.
Refiner
INVT GD5000 Medium-Voltage VFDs empower refiners to achieve high efficiency, energy saving, precise speed control, and improved paper production quality.
High-Speed Turbine Fan
INVT GD5000 series VFDs are adopted as the main drive with vector control, featuring stable operation and low failure rate, helping enterprises reduce costs and improve efficiency.
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