The Mitsubishi FR-A540-11K is a three-phase variable frequency drive engineered for precision speed and torque control of AC motors in demanding industrial environments. This 11 kW unit delivers 15 HP at constant torque or 20 HP at variable torque, combining sensorless vector control with advanced magnetic flux vector control to maintain stable operation across a 1:120 speed control range. The drive accepts 380–480 V three-phase input and operates up to 400 Hz output frequency, tolerating supply voltage fluctuations from 323 V to 528 V without performance degradation.
Technical Specifications
• Input Power: 3-phase AC, 380–480 V, 50/60 Hz
• Rated Capacity: 11 kW (15 HP constant torque / 20 HP variable torque)
• Output Current: 23 A (constant torque) / 27 A (variable torque)
• Output Frequency Range: 0.2 Hz to 400 Hz
• Speed Control Range: 1:120
• Voltage Tolerance: 323–528 V AC
• Frequency Tolerance: ±5%
• Overload Rating: 150% for 60 seconds (constant torque) / 120% continuous (variable torque)
• Regenerative Braking Torque: Up to 20% continuously
– Key Features
• Sensorless vector control with auto-tuning RISC processor for high-precision motor operation independent of temperature variation
• Soft-PWM control for optimized electromagnetic performance
• Ultra-low-speed torque stability and smooth operation at reduced frequencies
• Overcurrent, overvoltage, undervoltage, overload, and overheating protection
• Diagnostic error code reporting for troubleshooting
– Interfaces & Communication
• RS-485 standard communication
• Keypad control interface with parameter setting capability
• Optional FR-DU04 or FR-PU04 control panels featuring backlit LC-display and multi-language numeric keypad
• Three internal expansion slots for option card mounting
• Direct PLC integration via CC-Link; supports PLC X/Y instructions and operates alongside HMI and on-site control systems
• Pulse train, analog, and digital I/O available
– Typical Applications
Pumps, fans, conveyors, machine tools, packaging machinery.
