INVT GD880 Drives Enhance Fixed-Length Cutting Performance for Heavy Plate Mills

Amid a complex and volatile global economic landscape and increasing uncertainties in supply chains, Chinese steel enterprises are facing various challenges. To address potential risks such as technology blockades and supply chain disruptions, accelerating the adoption of made-in-China solutions has become an inevitable choice for the steel industry.Against this backdrop, a steel company in Nanjing seamlessly replaced the fixed-length cutting equipment in its medium and heavy plate coil mill with domestically made solutions. This not only improved production efficiency and quality but also resolved supply chain issues and the problem of equipment obsolescence.

INVT solution

To meet the needs of the steel company in Nanjing, INVT provided a customized GD880 series cabinet solution. This solution precisely matches the key equipment parameters of the fixed-length cutting machine, including a cutting force of 1400 tons, a blade opening length of 225 mm, a blade radius of 7200 mm, two motors rated at 750 kW each, a rated voltage of 660 V, and a rated speed of 1200 rpm.

In addition to its high control accuracy, strong overload capacity, and high efficiency, the GD880 series inverter offers the following features:

1. High reliability: Uses long-life components and comprehensive protection measures to withstand harsh operating conditions, ensuring stable operation of the fixed-length cutting machine.
2. High-precision control and dynamic response: Better responds to operation curves issued by the PLC, meeting the cutting process requirements and improving cutting speed.
3. Modular design: Takes up less space, features a plug-and-play design for easy module replacement, and facilitates convenient maintenance for users.

Customer benefits

By adopting INVT’s solution, the medium and heavy plate coil mill achieved the following benefits:
1. Cost reduction: For the first time, the fixed-length cutting drive in the mill used a made-in-China solution, reducing costs by 40–55%.
2. Process compliance: The INVT solution met all process functions and performance requirements.
3. Modular design: Power unit replacement time was significantly shortened, saving the customer valuable downtime during troubleshooting.
4.   Space efficiency: Space utilization was improved by approximately 50%.

The successful commissioning of the INVT GD880 series cabinet in the fixed-length cutting line of the medium and heavy plate coil mill not only marks a breakthrough application of INVT’s drive products in the steel industry but also demonstrates INVT’s strength and innovation in this sector. Moving forward, INVT will continue to deepen its focus on the steel industry, providing more customers with customized and efficient drive solutions to support the high-quality development of the steel sector.