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.
Impact and resonance during equipment startup lead to high wear of drums and bearings, as well as long downtime for maintenance.
Unstable washing quality and large fluctuations in pulp cleanliness affect the product yield.
Poor multi-unit speed synchronization causes frequent pulp breakage and accumulation, easy motor burnout due to overload, low production continuity, and high maintenance costs.
INVT GD5000 Medium-Voltage Drive Cluster Control Solution achieves energy savings by precisely regulating motor speed. Its soft start eliminates startup shocks and reduces resonance damage to equipment. Equipped with a multi-unit synchronous control algorithm, it ensures a speed coordination error of less than 0.5% among all washing units. The built-in intelligent overload protection monitors motor status in real time to prevent burnout.
View Larger ImageMature power unit series connection technology with high power factor and excellent fault tolerance.
Triple-core architecture of DSP + FPGA + ARM, combined with advanced control algorithms, ensures high control accuracy, fast dynamic response and high low-frequency output torque.
Optimized structural layout and distributed cabling result in a more compact size and better heat dissipation.
Connect to the DCS system to realize automatic linkage control.
Pumps and pulp washers can operate under optimal working conditions to achieve energy conservation and reduce raw material consumption.
The VFD adopts stepless speed regulation technology, enabling pumps and pulp washers to run smoothly within a wide speed range and achieve precise and sensitive speed adjustment.
The power factor on the grid side can reach above 0.97, effectively improving the power supply efficiency of the power grid.
The output waveform is perfect with a distortion rate lower than 2%.
The VFD ensures the motor operates under optimal conditions at all times, greatly extending its service life.
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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.
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.
Super Calender
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.
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