6SE6440-2UD41-1FB1 Siemens Frequency Converter MICROMASTER 440 380-480 VAC 110 kW

6SE6440-2UD41-1FB1 Siemens Frequency Converter MICROMASTER 440 380-480 VAC 110 kW

1.Overview of the 6SE6440-2UD41-1FB1 Siemens

The Siemens 6SE6440-2UD41-1FB1, part of the MICROMASTER 440 (MM440) series, is a 110 kW, three-phase 380-480 V general-purpose vector inverter with no built-in filter. Designed for industrial applications requiring high dynamics, high precision, and heavy-load starting, it utilizes IGBTs and a 32-bit microprocessor for closed-loop vector control, supporting full torque output at 0 Hz, a fast torque response of 0.12 seconds, and a speed accuracy of ±0.01%. This fully meets the requirements of equipment with extremely demanding dynamic performance, such as cranes, compressors, high-speed spinning, and conveyor lines.

The inverter features built-in Flux Current Control (FCC), slip compensation, flying restart, multi-step V/f, S-curve acceleration and deceleration, free function blocks, and PID auto-tuning. It easily implements processes such as constant pressure water supply, closed-loop air volume, tension winding, and positioning ramp deceleration, eliminating the need for an external PLC for common process control. The comprehensive protection system includes overload capabilities of 150% for 60 seconds and 200% for 3 seconds, as well as multiple monitoring functions including overvoltage/undervoltage, ground fault, short circuit, I²t motor overheating, stall, stall, and PTC thermistor. With removable "Y" capacitors, it can be used directly in IT grids or high-resistance grounding systems.

The unit features an FX-sized modular metal enclosure with isolated power and motor terminals and independent cooling ducts, ensuring safe operation within a 300 mm upper and lower clearance. The control terminals utilize screwless quick-connect connectors and come standard with 6 DI, 2 AI, 2 AO, and 3 relay outputs. The I/O board and operator panel are hot-swappable, allowing for on-site maintenance without downtime. A built-in brake chopper allows for four-quadrant rapid braking with an external brake resistor. Communication cards such as PROFIBUS, CAN, DeviceNet, and Ethernet/IP are supported, enabling seamless integration with S7, TIA, and third-party controllers. The 6SE6440-2UD41-1FB1 has been operating stably in numerous domestic projects, including energy-saving retrofits for fans and water pumps, 110 kW crane travel systems, injection molding machine servo oil pumps, and high-speed corrugated paper production lines. Its high power density, strong overload capability, and easy commissioning make it one of the most cost-effective imported vector inverters in the 90-110 kW range.

2.Core Features:

Power range: 110 kW (heavy-duty CT)
Input voltage: 380–480 V 3 AC ±10%
Input frequency: 47–63 Hz
Rated output current: 202 A (CT)
Overload capacity: 150% for 60 s, 200% for 3 s (CT)
Output frequency: 0–650 Hz
Control methods: V/f, FCC, SLVC (vector control without encoder), VC (vector control with encoder), torque control
Switching frequency: 2–16 kHz (derating for >4 kHz)
Efficiency: ≥ 98%
Braking unit: Built-in brake chopper, maximum braking power: 110 kW continuous
Dimensions: FX, 1400 x 326 x 356 mm (H x W x D)
Protection degree: IP20, requires cabinet installation
Operating temperature: 0°C to +40°C (derating for >40°C)
Cooling method: Forced air cooling, air flow 405 m³/h
Altitude: Rated 1000 m, >1000 m derate 1%/100 m
Certifications: CE, UL, cUL, C-Tick, SEMI F47

Flux Current Control (FCC): Automatically optimizes excitation to improve low-speed torque and dynamic response.
SLVC sensorless vector control: Outputs 150% of rated torque at 0.5 Hz, with a speed accuracy of ±0.2%.
VC closed-loop vector control: With encoder, speed accuracy of ±0.01%, torque response < 5 ms.
Torque control mode: Directly set tension, winding, and potential load constant torque reduction.
Flying restart: Shock-free grid connection of a rotating motor.
Auto-tuning: One-click identification of static and dynamic motor parameters.
Free function blocks: Logic, arithmetic, timing, and comparator functions enable simple process control independent of the PLC.
PID controller: With auto-tuning, suitable for constant pressure water supply and air volume closed-loop control.
Jump frequency: 4 levels to avoid mechanical resonance.
S-curve & deceleration ramp: Smooth starts and stops to protect the machine.
Dynamic braking & DC braking: Rapid stops to prevent hook slippage.
Fault memory & black box: Records eight sets of real-time data before and after the fault for quick location identification.

No Standard Operator Panel: This model does not come with an Advanced Operator Panel (AOP) or Basic Operator Panel (BOP) when supplied. Parameter setting and commissioning require additional configuration or software.

No Internal Filter: This model does not include an EMC filter. If electromagnetic interference (EMI) is required on-site, this filter must be installed separately.

Installation and Environment: Due to its IP20 protection rating, it must be installed inside a cabinet to prevent intrusion of solid foreign objects and liquids. The ambient temperature must be between 0°C and +40°C.

3.Product details pictures

4. Related products