Permanent Magnet Drum Drive Control System Solution

The Permanent Magnet Drum Drive Control System Solution is designed for belt conveyors in mining, chemical, and building materials industries. It replaces traditional reducer-and-asynchronous-motor drive systems with the STY series permanent magnet direct-drive drum drives, reducing procurement and maintenance costs while achieving S-curve smooth starts, lower failure rates, precise speed-torque control, and energy savings. Wolong's system solution is structured across four layers: Information, Control, Drive, and Execution. The Information and Control layers utilize Wolong Shunyun IoT modules and PLCs to manage information exchange, configure communication parameters, enable remote monitoring, and support both app-based and web interfaces for ease of use. These layers also offer extensive communication and I/O expansion resources. The Drive layer consists of WD200 series inverters and energy feedback units employing regenerative braking with vector control to recover and reuse energy. The Execution layer features the STY series permanent magnet direct-drive drum drives, eliminating the need for reducers and asynchronous motors. Advanced wireless temperature-vibration integrated sensors are deployed to collect intelligent data, which is connected to Wolong iMotorLinx Shunzhi Cloud industrial internet platform. Key technical specifications for the STY series permanent magnet electric drums include a drum diameter ranging from 500 to 1250mm, rated power from 22 to 315kW, rated belt speed from 1.6 to 5.0m/s, rated voltages of 380V and 660V, continuous duty cycle (S1), efficiency class 1 (GB/T 30253), B3 mounting style, F-class insulation, IP55 protection rating, IC71W cooling method, steel housing, grease-lubricated bearings with oiling/draining facilities. Optional customizations include drum diameter, rated power, and rated belt speed tailored to customer needs; duty cycles S2 and S3; H-class insulation; IP54 and IP56 protection ratings; IC416 cooling methods; and PT100 or PTC protection devices. The product lineup covers drum diameters of 500, 630, 800, 1000, and 1250mm. For belt widths of 650, 800, 1000, 1200, 1400, and 1600mm, and belt speeds of 2, 2.25, 2.5, 3.15, 3.5, 4.0, and 5.0m/s, selectable power ranges from 22 to 315kW. For example, at a drum diameter of 500mm, belt width of 800mm, and belt speed of 4.0m/s, available powers include 30, 45, 55, 75, and 90kW. At a drum diameter of 1000mm, belt width of 1200mm, and belt speed of 4.0m/s, options range from 55 to 315kW. At a drum diameter of 1250mm, belt width of 1600mm, and belt speed of 3.15m/s, available powers are 132, 160, 250, 280, and 315kW. When ordering motors, consider the load equipment type, voltage, belt width, belt speed, drum diameter, operating environment (indoor/outdoor, ambient temperature, altitude, corrosion resistance), protection rating, rotation direction, terminal box entry type, insulation class, whether the drum includes a brake, rubber covering requirements (ceramic or non-ceramic), cooling method (water-cooled or forced air-cooled), water circulation system availability, and duty cycle. A sample specification reads: Load Type: Belt Conveyor; Drum Diameter: 1000mm; Power: 75kW; Belt Speed: 2.5m/s; Belt Width: 1400mm; With Brake; Ceramic Covering; Voltage: 380V; Clockwise Rotation; Protection Rating: IP55; Insulation Class: F; Efficiency Class: 1. Motor designation: STY-75-2.5-1000/1400(380) IP55 F 1Class Brake Ceramic Covering. Special requirements regarding voltage, frequency, protection rating, rotation direction, mounting style, noise, vibration, or terminal box connections must be approved by technical personnel prior to manufacturing. The WD200 series high-performance general-purpose inverters represent Wolong's latest generation, covering power ranges from 0.75kW to 1000kW. They support four power supply types, employ advanced motor control algorithms optimized for Wolong motors, and are compatible with asynchronous motors, permanent magnet synchronous motors, and synchronous reluctance motors. Features include high reliability, performance, scalability, multi-drive support, and easy cabinet integration. The compact narrow-body design enhances cabinet flexibility, saves space, and reduces costs. Performance highlights include high starting torque (0.5Hz outputting 150% rated torque in SVC mode) and 0Hz outputting 200% rated torque (FVC mode). Excellent low-frequency characteristics ensure stable operation under 1Hz rated load (SVC) and 0Hz rated load (FVC). Speed control accuracy is within 0.1% of rated speed (SVC) and 0.05% (FVC). Maximum efficiency reaches 98%. Superior current suppression minimizes shock currents from sudden load changes and reduces equipment downtime. Product parameters include three-phase voltages of 380V to 480V and 660V to 690V, with frequencies of 50Hz/60Hz. Allowed voltage imbalance is less than 3%, frequency fluctuation ±5%, and distortion meets IEC61800-2 standards. Compatible motor sizes range from 0.75 to 1000kW. Output frequency spans 0Hz to 600Hz. Installation altitude must be below 1000 meters; above this, derating applies at a rate of 1% per 100 meters increment. Conditions exclude condensation, ice, rain, snow, or hail, with solar radiation below 700W/m². Atmospheric pressure ranges from 70kPa to 106kPa. Operating temperatures range from -10°C to +50°C; operation above 40°C requires derating, with a maximum no-load temperature of 60°C. Humidity tolerance is 5%RH to 95%RH without condensation. Vibration levels between 9Hz and 200Hz are 5.9m/s² (0.6G). Storage temperature ranges from -30°C to +60°C. Mounting is wall-mounted with an IP31 rating (higher ratings customizable). Cooling is forced air. The iMotorLinx Shunzhi Cloud Industrial Internet Platform offers real-time monitoring, on-demand visualization, fault diagnosis analysis, spectrum analysis, precise alarm management, and energy-saving insights. It monitors core metrics such as equipment count, runtime, load factor, and environmental parameters, providing diverse chart formats for multi-scenario data visualization. Wireless temperature-vibration sensors collect motor data for spectral analysis and remote fault diagnosis. Users can quickly create personalized alarm rules and receive timely notifications via email, SMS, HTTP, or HTTPS. Comprehensive benefit analysis of the permanent magnet direct-drive system uses a rated drum power of 180kW as a baseline. Statistics are based on drum shaft load rates of 25%, 50%, 75%, and 100%, with segmental working time proportions of 10%, 20%, 40%, and 30%. Assuming annual operation of 330 days at 16 hours/day: Solution 1 (Asynchronous Motor + Fluid Coupling + Reducer): Reducer efficiency 93%, fluid coupling efficiency 94%; motor selection rated power 200 to 250kW; motor efficiency 75% to 94%; total system efficiency 66%, 71%, 78%, 82%; system input power 68.6, 127.1, 173.5, 219.0kW; average system input power 167.4kW; annual energy consumption 883885kW kWh. Solution 2 (Inverter + Variable Frequency Asynchronous Motor + Reducer): Inverter efficiency 97% to 98%; motor efficiency 76% to 93%; total system efficiency 69%, 74%, 81%, 84%; system input power 65.0, 120.9, 165.8, 214.6kW; average system input power 161.4kW; annual energy consumption 851943kW kWh. This saves 31942kW kWh annually compared to Solution 1, representing a 3.61% energy saving rate. Solution 3 (Inverter + Variable Frequency Permanent Magnet Electric Drum): Motor selection rated power 185kW; motor efficiency 91.2%, 93.4%, 94.4%, 94.6%; inverter efficiency 97% to 98.1%; total system efficiency 89%, 91%, 92%, 92%; system input power 50.3, 98.5, 146.8, 196.2kW; average system input power 142.3kW; annual energy consumption 751415kW kWh. This saves 132469kW kWh annually compared to Solution 1 (14.99% saving rate) and 100528kW kWh compared to Solution 2 (11.80% saving rate). Note that variable-speed fluid couplers exhibit fixed proportional efficiency drops as speed decreases. Due to significant random variations in speed across different operating conditions, actual average efficiency may fall below rated values; therefore, these factors are not factored into the benefit calculations. Data in samples may vary due to technological advancements.

Use Cases:Direct drive retrofitting and new installation of belt conveyors for mining, chemical, building materials, and other industries. Belt width 650 to 1600mm, belt speed 1.6 to 5.0m/s, drum diameter 500 to 1250mm, power 22 to 315kW.