Mitsubishi FR-A540-0.75K

The Mitsubishi FR-A540-0.75K is a 0.75 kW AC frequency inverter from the A500 series, engineered for three-phase 380–480 V AC industrial motor control. Built on Mitsubishi’s all-digital vector control architecture, this drive delivers high starting torque and rapid speed response across both velocity and torque modes. An integrated RISC processor performs on-line auto-tuning of motor parameters, enabling stable torque output even at ultra-low speeds while maintaining precision independent of motor temperature variations. The inverter supports a 1:120 speed control range and operates across an output frequency span of 0.2 to 400 Hz.

– Technical Specifications

• Rated Power Output: 0.75 kW (1 HP constant torque; 1.5 HP variable torque)
• Input: 3-phase, 380–480 V AC, 50/60 Hz
• Output: 3-phase, 380–480 V AC
• Rated Output Current: 2.5 A (constant torque), 3.0 A (variable torque)
• Input Current: 2.5 A, 4.1 A
• Output Frequency Range: 0.2–400 Hz
• Speed Control Range: 1:120
• Control Method: All-digital vector control with Soft-PWM modulation
• Power Supply Capacity: 1.5 kVA (with power factor improving reactor)
• Enclosure Rating: IP20
• Dimensions: 150 × 260 × 140 mm
• Weight: 3.5 kg
• Maximum Ambient Temperature: 50 °C

– Key Features

• On-line auto-tuning via integrated RISC processor for motor operating conditions
• High starting torque and fast acceleration response
• Stable torque delivery at ultra-low speed operation
• Temperature-compensated precision—torque stability unaffected by motor thermal variations
• Soft-PWM control for reduced electrical noise

– Typical Applications

Pumps, fans, conveyors, and general industrial variable-speed motor control requiring precise torque regulation across extended speed ranges.

– Compatibility & Integration

• Standard Interface: RS485 (up to 32 units addressable)
• Optional Cards: Profibus DP, DeviceNet, CC-Link
• I/O: Pulse train, analog, and digital signal support
• Control Panel: Optional FR-PU04 with LC display, backlight, keypad, and eight-language support (direct or remote mounting)