Refiner
INVT GD5000 Medium-Voltage VFDs empower refiners to achieve high efficiency, energy saving, precise speed control, and improved paper production quality.
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Industry Challenges
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High equipment energy consumption and high cost。
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Grid fluctuations affect equipment stability.
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Motor startup impacts the power grid。
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Equipment maintenance and operation are complicated.
INVT Solution
Refiner
INVT provides solutions for the GD5000 series medium‑voltage variable frequency speed regulation systems.The GD5000 series Version 07 medium‑voltage variable frequency speed regulation system is an upgraded product optimized in software, structure and components based on the GD5000 series Version 06 medium‑voltage VFD.While maintaining the high reliability of the GD5000 series platform, it features a more compact structure, easier maintenance and more comprehensive protection.It can meet the precise speed and torque control requirements of refiners and ensure safe operation of the equipment.
View Larger ImageSolution Highlights
Mature 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, delivers high control precision, fast dynamic response and high low-frequency output torque.
Optimized structural layout plus distributed cabling enables smaller size and better heat dissipation.
Upgraded touch screen solution with configurable programming for easier maintenance.
Customer Benefits
01Grid Capacity Optimization
With limited customer grid capacity, the VFD realizes soft starting of motors, avoids grid impact, and ensures stable grid operation.
02Reduced Maintenance Costs
The comprehensive protection functions of the VFD lower equipment failure rates and reduce maintenance expenses. Meanwhile, the upgraded touch-screen solution with configurable programming makes maintenance more convenient.
03Remarkable Energy-Saving Effect
The VFD features stepless speed regulation with a wide speed range, high control accuracy and strong practicability. After frequency conversion renovation, the customer’s average power saving rate is around 10%, significantly reducing energy consumption costs.
04Stable and Reliable Operation
It provides high starting torque, with 1.5 times rated torque output at 0.5 Hz in open-loop mode, meeting the operation requirements of refiners. It offers fast torque response, resulting in small current fluctuations under varying loads. It also features excellent overload capacity and environmental adaptability, ensuring high operational reliability.
Industry Solutions
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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.
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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.
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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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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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