成都大陆希望集团有限公司

In the main shaft control room of a state-owned coal mine in Southeast Asia, as the new system completed its first smooth commissioning, the on-site technical director monitored the operational data and expressed sincere admiration: "Your products and services are trustworthy." For this renovation project, Hope Slanvert’s SBHQ Series Four-Quadrant High-Voltage Variable Frequency Drives were adopted to successfully upgrade and revitalize the drive system.

As the core equipment of coal mine production, the mine hoist is indispensable for the transportation of personnel and mineral resources, relying entirely on stable operation. The selection of its drive mode directly impacts the mine’s overall production efficiency, operational safety, and even comprehensive costs.

The original hoist motor utilized a rotor resistance series starting method, which had long been beset by multiple challenges: excessive current impact during start-up not only severely affected the power grid but also accelerated equipment wear; poor speed regulation stability compromised hoisting precision; persistently high energy consumption resulted in significant power wastage; and frequent equipment failures led to heavy maintenance workloads—all of which severely hindered the mine’s efficient operations.

Aligning with the mine hoist’s core requirements for high reliability and stability, Hope Slanvert deployed its SBHQ Series Four-Quadrant High-Voltage Inverter specifically designed for hoists, complemented by a dual main-control system redundancy solution. This "dual-core drive" configuration delivers enhanced reliability, serving as the key to addressing operational bottlenecks.

Dual Main-Control Redundancy: Each inverter integrates two independent control systems, enabling millisecond-level switchover. This eliminates the risk of production downtime caused by system failures and significantly enhances the reliability of the entire system.

High Control Precision: Equipped with high-performance vector control technology, the inverter achieves high torque output at low frequencies, featuring minimal torque ripple and rapid dynamic response—fully meeting the control demands of hoists under complex load conditions.

Strong Environmental Adaptability: Tailored to the harsh mine environment characterized by high humidity and heavy dust, the entire unit has undergone specialized enhancements in circuit protection, sealing, and heat dissipation, ensuring long-term stable equipment operation.

Following the upgrade of the hoist’s variable frequency drive system, the client has achieved remarkable, multi-faceted benefits:

Stable Equipment Operation: Smooth start-stop with zero impact, significantly improved speed control accuracy, reduced mechanical wear, and extended equipment service life.

Outstanding Energy-Saving Performance: Four-quadrant operation enables the feedback of braking energy to the power grid, realizing efficient energy utilization and substantially reducing electricity costs.

Substantial Reduction in Maintenance Costs: Markedly enhanced operational reliability and reduced failure rates have minimized maintenance workloads, along with costs associated with spare parts replacement and downtime for maintenance.

The successful commissioning of the high-voltage four-quadrant dual main-control variable frequency drive system not only precisely addresses the client’s practical operational pain points but also reaffirms the high reliability and strong adaptability of Hope Slanvert’s variable frequency drive solutions in the mining engineering sector.

Looking ahead, Hope Slanvert will continue to focus on the industry, delivering safer and more efficient industrial automation system solutions, empowering mining clients worldwide, and facilitating the full-process high-quality development of smart mines! (Contributed by: Hope Slanvert)