The MD290T3.7G/5.5PB is an enhanced power dual-rating variable frequency drive delivering 3.7kW constant torque and 5.5kW variable torque output for demanding industrial applications. Built with advanced vector control technology and an integrated braking unit, this drive provides robust speed and torque regulation for medium to large pumps, industrial fans, heavy conveyors and production machinery. It is ideally suited for water treatment systems, HVAC applications, material handling equipment and automated manufacturing lines where higher power capability and industrial-grade reliability are essential requirements.
Enhanced Power VFD — 3.7kW constant torque with 5.5kW variable torque dual rating handles larger motor loads with a single versatile drive unit.
Industrial Drive Module — Robust power stage with reinforced IGBT modules and independent cooling duct for continuous heavy-duty factory operation.
Speed And Torque Unit — Sensorless vector control with auto-tuning and slip compensation delivers precise speed and torque regulation under varying loads.
Built-in Braking Chopper — Integrated braking unit supports rapid deceleration and precise stopping without external braking modules.
Advanced PID Control — Built-in process PID with sleep/wake function enables closed-loop pressure, flow and temperature control applications.
Comprehensive Protection — Overcurrent, overload, short-circuit and phase loss safeguards with fault ride-through ensure maximum system uptime.
| Product Type | Enhanced Power Variable Frequency Drive |
| Model Number | MD290T3.7G/5.5PB |
| Rated Power (G) | 3.7 kW (Constant Torque) |
| Rated Power (P) | 5.5 kW (Variable Torque) |
| Input Voltage | Single-Phase 220 V AC |
| Input Frequency | 50 / 60 Hz |
| Output Frequency | 0 to 400 Hz |
| Control Mode | V/F, Sensorless Vector Control |
| Overload Capacity | 150% for 60s |
| Braking Unit | Built-in Braking Chopper |
| Communication | RS485 Modbus RTU |
| Protection Class | IP20 |
| Cooling Method | Forced Air Cooling |
| Ambient Temperature | -10°C to +40°C |
| Certification | CE, RoHS |
Water Treatment & Pumping Stations, Industrial HVAC & Ventilation Systems, Heavy Conveyor & Material Handling, Automated Manufacturing Lines, Mixing & Blending Equipment, General Industrial Drive Systems.