Siemens 6SE3228-4DK50 MASTERDRIVES VC Inverter Unit

Module Feature

6SE3228-4DK50 is Siemens SIMOVERT MASTERDRIVES VC series vector inverter, belongs to the classic MASTERDRIVES platform for heavy-duty industrial applications. It supports closed-loop flux vector control with encoder feedback and sensorless vector mode, excellent low-speed torque performance.

It has strong overload tolerance, suitable for cyclic heavy-load machinery. Expansion slots support encoder cards, Profibus communication modules and analog I/O option boards. Cooling adopts forced air fan cooling with temperature monitoring and comprehensive hardware protection. It is widely applied on cranes, extruders, main drives of production lines, large fans and water pumps.

Working principle

Three-phase AC power is rectified into DC bus, and IGBT power unit converts DC into adjustable frequency and adjustable voltage three-phase AC to drive asynchronous motor.

The control board reads encoder speed signal and motor current signal, executes vector algorithm to decouple torque and excitation current, achieving high-precision speed and torque regulation. During rapid deceleration, regenerative energy is released through external braking resistor. Drive receives setpoint and transmits fault status via fieldbus to upper control system.

Onboard components

Three-phase rectifier bridge, IGBT power stack, DC bus capacitor group, current sampling circuit, main DSP control board, option card expansion slots, cooling fan assembly, power and control terminal block.

LED indicators

Front panel LEDs indicate power, ready, run and fault status; detailed alarm information and parameter data can be viewed through the matching OP1S operator panel.

Hardware self‑diagnosis

Self-check covers input phase loss, DC bus overvoltage/undervoltage, output overcurrent, IGBT short circuit, module overtemperature, fan stall, encoder signal loss and communication timeout. Fault codes and operation records are stored in drive memory.

Programming software

Siemens DriveMonitor software for parameter configuration, motor identification, curve recording and firmware upgrade; local OP1S panel for on-site adjustment and fault query.

Electrical & Process Parameters

Model:6SE3228-4DK50 Brand:Siemens Series:SIMOVERT MASTERDRIVES VC Device type:Three-phase Vector Inverter Input voltage:3AC 380~480V Control mode:Closed-loop vector / sensorless vector Cooling:Forced air cooling Protection:IP20 Function:High-performance variable speed and torque control for heavy-duty AC asynchronous motors

Mechanical & Structure

Mounting:Cabinet backplane mounting Protection class:IP20 Housing:Metal chassis

Environmental

Operating temperature:0℃ ~ +40℃, derating required above 40℃ Storage temperature:-40℃ ~ +85℃ Ambient humidity:5~95% non‑condensing Certification:CE compliant Status:Siemens original MASTERDRIVES spare drive

Installation

Install in well-ventilated electrical cabinet and reserve sufficient heat dissipation space. Connect three-phase input power cable, motor output cable and brake resistor wiring. Install encoder or fieldbus option cards as required.

Complete motor identification and vector loop tuning in DriveMonitor. Test emergency stop, overload and braking functions before commissioning. Clean fan and air inlet filter periodically.

Interface

L1/L2/L3 power input terminals, U/V/W motor output terminals, brake resistor terminals, option card slots, encoder interface, control signal terminals.

Diagnostic

Overcurrent trip: Motor insulation damage, cable short circuit or mechanical jamming.

DC bus overvoltage: Deceleration ramp set too short, brake resistor missing or damaged.

Over-temperature fault: Fan failure, blocked air duct or continuous frequent heavy load operation.

Encoder fault: Encoder cable breakage, wiring error or encoder damage.

Product Brief

Siemens 6SE3228-4DK50 SIMOVERT MASTERDRIVES VC vector inverter, 380-480V three-phase, high-torque vector control, expandable encoder and Profibus, used for crane, extruder and heavy industrial main drive speed regulation.