ZFENG High Efficiency And Energy-saving Lifting Equipment Dedicated Frequency Converter, Green And Environmentally Friendly, More Cost-effective For Long-term Use

I. Core Product Values

1. Precise Power Control for Enhanced Operational Efficiency
   • Utilizes advanced vector control technology (e.g., sensorless vector control, closed-loop vector control) to deliver high torque at low frequencies (up to 150% rated torque at 0.5Hz), ensuring smooth lifting, luffing, and slewing operations for cranes.
   • Features a wide speed range (1:1000 or higher) with ±0.1% speed control accuracy (closed-loop mode), meeting high-precision positioning demands and reducing repetitive adjustments.
   • Supports multi-speed control, PID regulation, and dither control functions to adapt to dynamic response requirements across various working conditions.
2. Energy Efficiency for Reduced Operational Costs
   • Optimizes motor operation curves to minimize reactive power losses, achieving a comprehensive energy savings rate of 15%-30%, particularly suited for crane applications with frequent start-stop cycles.
   • Soft start/stop functionality reduces mechanical shocks, extending the lifespan of motors, gearboxes, and other equipment while lowering maintenance frequency and costs.
3. Comprehensive Safety Protections for Stable Operation
   • Overload capacity: 150% rated current for 60 seconds, 200% rated current for short-term protection (duration varies by design), preventing burnout from overloading.
   • Built-in over 20 fault protection mechanisms (overcurrent, overvoltage, undervoltage, phase loss, overtemperature, ground faults, etc.), with real-time monitoring and automatic shutdown alerts.
   • Braking unit protection and harmonic suppression functions reduce grid pollution and equipment vibration, enhancing system reliability.
4. Intelligent Connectivity for Simplified Operation and Management
   • Supports RS485, CANopen, Ethernet, and other communication protocols for integration with PLCs, HMIs, or upper-level systems, enabling remote monitoring, parameter adjustments, and data logging.
   • Equipped with LED displays or touchscreen interfaces for intuitive visualization of operating status, fault codes, and parameter settings, ensuring user-friendly operation.

II. Technical Specifications and Adaptability

1. Power and Voltage Range
   • Power coverage: 0.75kW–450kW, compatible with single-girder, double-girder, gantry, tower, and other crane types.
   • Input voltage: Three-phase 380V ±15% (some models support 220V/660V customization), frequency 47–63Hz.
   • Output voltage: 0–input voltage (adjustable), frequency 0–600Hz (higher frequencies supported by select models).
2. Control and Interface Features
   • Control modes: V/F control, open-loop vector control, closed-loop vector control (requires encoder feedback).
   • Input interfaces: 6–8 programmable digital inputs, 2–4 analog inputs (0–10V/4–20mA).
   • Output interfaces: 2–4 digital outputs, 1–2 relay outputs, 1 analog output (0–10V).
   • Communication interfaces: Standard RS485, optional Profibus, DeviceNet, EtherCAT, etc.
3. Environmental Adaptability
   • Operating temperature: -10°C to +50°C (some models support -20°C to +60°C), storage temperature -25°C to +70°C.
   • Protection class: IP20 (indoor cabinet installation) or IP54 (outdoor dust/water resistance), suitable for harsh environments like humidity and dust.
   • Cooling method: Forced air cooling (some models support independent air ducts or water cooling).

III. Typical Application Scenarios

1. Port Cranes
   • Requirements: Heavy-load low-speed stability, frequent start-stop cycles, salt spray corrosion resistance.
   • Solution: High overload capacity (200% rated current for 3 seconds), braking resistor for rapid braking, IP54 protection.
2. Construction Tower Cranes
   • Requirements: Precise slewing positioning, wind load vibration resistance, user-friendly operation.
   • Solution: Closed-loop vector control (±0.1° positioning accuracy), dither function to suppress resonance, touchscreen for one-touch operation.
3. Metallurgical Cranes
   • Requirements: High-temperature operation, heavy-load startup without shock, strong electromagnetic interference.
   • Solution: Wide temperature design (-20°C to +60°C), anti-EMI filtering, direct torque control (DTC) with <1ms response.
4. Warehouse Stackers
   • Requirements: High-speed reciprocating motion, energy savings, compact design.
   • Solution: Light-load efficiency mode, regenerative braking energy feedback, compact size for easy installation.

IV. Service and Support System

1. Pre-Sales Technical Support
   • Free consultation on load calculations, motor matching, and system topology design.
   • Sample testing support to verify performance and compatibility.
2. After-Sales Guarantee
   • Warranty period: 18months
   • Repair commitment: Use of genuine parts, with comprehensive post-repair test reports.
3. Training and Resource Support
   • Free operational training, troubleshooting guides, and parameter setting video tutorials.
   • Customized training: On-site commissioning and maintenance training for complex systems.

V. Purchase Guide

1. Select by Power Requirements
   • Light-duty scenarios (e.g., single-girder cranes): 0.75kW–15kW, focusing on cost-effectiveness and energy savings.
   • Medium-heavy-duty scenarios (e.g., double-girder cranes): 18.5kW–75kW, requiring high overload capacity and stable braking.
   • Ultra-high-power scenarios (e.g., metallurgical cranes): 90kW+, emphasizing heat dissipation design and anti-interference capabilities.
2. Select by Functional Requirements
   • High-precision positioning: Choose models supporting closed-loop vector control with encoder feedback.
   • Multi-machine coordination: Opt for models with CANopen or Ethernet communication.
   • Energy efficiency certification: Prioritize products meeting IE3/IE4 energy efficiency standards.
3. Select by Environmental Requirements
   • High-temperature/dusty environments: Choose IP54 protection and wide-temperature models.
   • Strong electromagnetic interference scenarios: Select models with filtering and shielding designs.