AC Variable Frequency Drive (VFD) 1HP-10HP 220V/380V - Detailed English Translation

I. Product Overview

This product is a 1HP-10HP Vector Control Frequency Inverter supporting 220V (single/three-phase) and 380V (three-phase) input voltages. It is designed for industrial applications such as pumps and fans, offering high-precision vector control, energy efficiency, and comprehensive overload protection.

II. Core Parameters & Performance

1. Power & Current Matching
   • Power Range: 1HP (0.75kW) to 10HP (7.5kW), suitable for small to medium-sized motors.
   • Output Current:
     • 220V Input: 4A (1HP), 9.6A (3HP).
     • 380V Input: 2.1A (1HP), 17A (10HP).
   • Selection Principle: Base selection on motor operating current. For heavy-duty applications (e.g., cranes), choose G-type drives with 2-3 power ratings.
2. Control Method
   • Vector Control (Open/Closed Loop):
     • High Starting Torque: Stable torque at low frequencies (e.g., 180% rated torque at 0.25Hz).
     • Wide Speed Range: Speed regulation ratio up to 1:100 for precision applications (e.g., CNC machines, printing presses).
     • Fast Dynamic Response: Rapid speed adjustment under load changes.
3. Energy Efficiency
   • Principle: Adjusts motor speed to match load demands, avoiding energy waste from throttling (e.g., valves/dampers).
   • Case Studies:
     • Steel Industry: 38% annual energy savings after retrofitting rolling mills.
     • Municipal Water Supply: 20% energy reduction with control and reduced pipeline burst risks.
     • Port Cranes: 40% energy savings per unit, recovering 120,000 kWh annually.

III. Overload Protection

1. Inverse Time Overload Protection
   • Mechanism: Simulates motor thermal characteristics using an electronic thermal relay. Protection time decreases as current exceeds rated values.
   • Setting: Adjustable threshold (e.g., 120% of rated current) with customizable overload curves.
2. Overcurrent Protection
   • Instantaneous Detection: Immediate output cutoff during short circuits (far exceeding rated current).
   • Application: Prevents damage during motor internal/output short circuits.
3. Other Protections
   • Voltage Protection: Safeguards against undervoltage/overvoltage conditions.
   • Short Circuit Protection: Rapid fault isolation.
   • Thermal Protection: Temperature sensors monitor internal heat, triggering derating or shutdown.

IV. Selection Guidelines

1. Load Type Matching
   • Constant Torque Loads (e.g., cranes): Use G-type drives with 2-3 power ratings.
   • Variable Torque Loads (e.g., fans/pumps): Select P-type drives equal to motor capacity.
   • Special Loads (e.g., synchronous motors): Increase drive capacity by 10-20%.
2. Environmental Adaptability
   • Temperature/Altitude: Derate if ambient temperature >40°C or altitude >1000m.
   • Protection Class: IP55+ for dusty/humid environments.
   • Installation Distance: Reduce carrier frequency or add output reactors if drive-motor distance >50m.
3. Special Requirements
   • Multi-Motor Drives: Add thermal relays per motor; VFD control limited to V/F mode.
   • Long-Distance Transmission: Lower carrier frequency or install output reactors.

V. Installation & Commissioning Notes

1. Carrier Frequency: Automatically reduce at low speeds to minimize electromagnetic interference.
2. Resonance Avoidance: Use frequency skip function to bypass mechanical resonance points.
3. Braking Unit: Required for heavy-load descending or high-speed braking; enables energy recovery.
4. Parameter Optimization: Adjust PID settings, acceleration/deceleration times based on load characteristics.