ACI DLT Series Mine Hoist Dedicated Energy-Saving Cabinet

Mine Hoist Dedicated Energy-Saving Cabinet is an energy-efficient device designed specifically for mine hoists. By optimizing motor operation and energy recovery technologies, it significantly reduces electrical energy consumption and enhances system efficiency. Below is a detailed introduction to its core features, technical principles, and application advantages.

I. Core Features

1. High-Efficiency Energy Recovery
   Utilizes a dedicated energy feedback unit to convert mechanical energy (potential and kinetic energy) generated during hoist deceleration or braking into electrical energy, which is fed back into the AC power grid for reuse by other equipment, minimizing energy waste.

2. Variable Frequency Speed Control Technology
   Employs a fully digital variable frequency speed control device (e.g., ABB ACC800 series) to achieve four-quadrant motor operation, dynamically adjusting motor speed and torque to adapt to load variations, eliminating the "large motor driving a small load" phenomenon.

3. Intelligent Control System
   Integrates a programmable logic controller (e.g., KDN CPU306 series) for logic control, speed closed-loop control, and safety protection functions, featuring fault self-diagnosis and remote monitoring capabilities.

4. High Protection Grade and Reliability
   Cabinet design meets the requirements of harsh mine environments, offering dustproof, moisture-proof, and shock-resistant capabilities to ensure long-term stable operation.

II. Technical Principles

1. Motor Operation Efficiency Improvement
   • Variable frequency speed control replaces traditional voltage regulation methods, keeping the motor operating in high-efficiency zones.
   • Reactive power compensation and optimal power factor control reduce grid losses.
2. Energy Feedback and Reuse
   • During hoist deceleration, mechanical energy is converted into DC electrical energy via the motor and frequency converter, stored in capacitors.
   • The energy feedback unit returns the stored energy to the power grid, avoiding efficiency losses and heat generation from resistor dissipation.
3. Dynamic Parameter Adjustment
   • Real-time voltage and frequency adjustments based on hoist operating conditions (e.g., speed, load) optimize electrical energy usage efficiency.

III. Application Advantages

1. Significant Energy-Saving Effects
   • Energy savings can reach 30%–45%, particularly beneficial for deep shafts, frequent-use, or newly installed hoists.
   • Reduces heat emissions from resistor dissipation, improving the environment around control cabinets.
2. Extended Equipment Lifespan
   • Lowers thermal stress on motors and frequency converters, prolonging equipment life.
   • Stabilizes voltage and frequency, reducing impacts on the power grid.
3. Enhanced Safety
   • Full intelligent control and fault self-diagnosis functions ensure safe equipment operation.
   • Comprehensive after-sales warranty services (e.g., 18-month warranty, lifetime maintenance) reduce maintenance costs.
4. Environmental and Economic Benefits
   • Reduces electrical energy waste and carbon emissions, aligning with green mine construction requirements.
   • Lowers operating costs and enhances mine profitability.

IV. Selection Recommendations

1. Match System Requirements
   Choose the appropriate energy-saving cabinet model based on the hoist's power, shaft depth, and usage frequency.

2. Focus on Technical Parameters
   Prioritize energy-saving rates, protection grades, energy feedback efficiency, and compatibility.

3. Select Reliable Brands
   Prefer manufacturers with experience in mine hoist manufacturing and technical expertise to ensure product quality and after-sales service.

4. Consider Customization Needs
   For special operating conditions (e.g., multi-rope, multi-level hoists), choose suppliers offering customized solutions.

GuangDong Zhufeng Electric Co.,LTD established in 2004, is a national high-tech and energy save enterprise with approval by National Development and Reform Commission. Focusing on the development and production and sale of products of “energy saving and control speed and variable speed” , Zhufeng has been a very good supplier for energy saving and automation control solutions . With it’s own brands: “ACI”,“ZFENG”, Zhufeng has developed DLT series products including vector and universal variable frequency drive, servo system, energy saving cabinet, industrial power saver, soft starter etc. Applications including ceramic, machinery, petrochemical, metal, textile, food, papermaking, cement, water supply, plastic injection, central air-conditioning, smart building,etc.