Introduction
With the continuous maturation of high-voltage variable frequency drive (VFD) technology, four-quadrant drives are extensively utilized in the mining sector. For electric drive systems, the configuration of Permanent Magnet Motors (PMMs) coupled with variable frequency speed control has become predominant. The application of high-capacity VFDs to drive mine hoisting systems is especially significant in the context of intelligent mines.
Project Overview
In a newly established mine project in Ordos, the client, following comprehensive multi-party evaluation, selected FGI four-quadrant drives, which command a significant market share in this industry.
The configuration involves two Model JD-BP37-1400T (1400kW/6kV) high-voltage four-quadrant drives operating in a dual-drive parallel arrangement to power a 6kV/2500kW Permanent Magnet Synchronous Motor (PMSM) for the hoist system.
Field Equipment Diagram
System Scheme
The system utilizes two high-voltage four-quadrant drives to operate a single motor, employing a master-slave control architecture for data signal linkage. The data definitions for master-slave control signal transmission are specified as follows.
| Send |
Receive |
Communication Content |
| 1#A-T |
2#A-R |
Unit #1 sends to Unit #2: output voltage, frequency, and start/stop status. |
| 1#B-T |
2#B-R |
Unit #1 sends to Unit #2: voltage, current, and status signals. |
| 2#A-T |
1#A-R |
Unit #2 sends to Unit #1: output voltage, frequency, and start/stop status. |
| 2#B-T |
1#B-R |
Unit #2 sends to Unit #1: voltage, current, and status signals. |
Master-Slave Control Data Transmission Definition
The master-slave control signal connection topology is depicted in the figure below. Data communication is realized through fiber optic links, which substantially improves the noise immunity of signal transmission.
Master-Slave Control Signal Connection
This configuration allows either Drive #1 or Drive #2 to be designated as the master unit, thereby providing enhanced operational flexibility and convenience at the application site.
Operational Advantages
Beyond the capabilities of standard high-voltage VFDs, Sunlight's high-voltage hoist drives incorporate the following distinctive features optimized for hoist control applications:
- Input Inrush Current Limiting Technology for Power-Up: This technology minimizes the current surge during each high-voltage power-up sequence, thereby reducing the impact on the power grid.
- Low No-Load Loss Control Technology: In standby mode, the drive system exhibits minimal no-load losses, which have been empirically verified to be 2-3 times lower than those of products based on conventional technologies.
- Vector Control Technology: Facilitates four-quadrant motor operation, incorporating capabilities such as zero-speed holding without mechanical brake engagement and torque preset functionality.
- Hoist Drive Specific Functions: Integrates multiple braking modes, including regenerative braking, DC injection braking, and safety braking, to ensure dependable hoist operation.
- Dedicated Hoist Interfaces: Offers a comprehensive suite of interfaces for seamless integration with the hoist electrical control system.
Conclusion
The rapid advancements in industrial automation and green energy-saving technologies underscore the significant advantages offered by the synergy between four-quadrant drives and Permanent Magnet Synchronous Motors (PMSMs) in enhancing the performance of hoisting systems. This combination provides a robust technological foundation for the intelligent and high-efficiency operation of permanent magnet hoists.
The profound integration of Sunlight's four-quadrant drives with permanent magnet hoists represents not merely an inevitable trajectory for the upgrade of traditional industrial equipment, but also a critical technological pathway towards realizing intelligent manufacturing and sustainable development.
Prospectively, under the dual impetus of policy support and market demand, Sunlight is committed to achieving continuous breakthroughs in areas of high efficiency and energy conservation, intelligent control, and application scenario adaptability, thereby injecting new dynamism into the transformation and upgrading of China's intelligent mining sector.
Production Base: North of the middle section of Jincheng Road, Economic Development Zone, Wenshang County
R&D Center: No. 21, Gongye North Road, Baoshan Sub-district, Licheng District, Jinan City
Email: overseas@fengguang.com
Website: www.fengguang.com.
Your message must be between 20-3,000 characters!