Description
SEW 31C075‑503‑4‑00
Technical Specifications: Rated motor power:7.5kW Three‑phase input voltage:380VAC–500VAC Rated output current:15.5A Maximum output current:23.25A Control mode:VFC open‑loop flux control Protection class:IP20 Ambient operating temperature:0℃ to +45℃ Cooling method:Forced air cooling Net weight:5.3kg
Functional Features: Vertical DIN rail installation inside electrical cabinet IP20 protection only for cabinet interior Complete protection functions: overcurrent, overvoltage, undervoltage, overtemperature, earth fault, short circuit Multi‑channel digital and analog I/O terminals Automatic motor parameter identification Multi‑step speed function Analog speed reference input Relay contact for fault signal output
Application Scenarios: Medium heavy conveyor drive Fan and pump energy saving speed regulation Printing auxiliary roller drive Packaging machine material conveying Woodworking machinery feed transmission
Performance Parameters: Output frequency range:0Hz–500Hz Overload capacity:150% rated current for 60 continuous seconds Open‑loop VFC speed control accuracy ±0.5% Adjustable acceleration and deceleration ramp time
Material Composition: Cold rolled steel powder coated housing Multi‑layer industrial PCB control board High‑power IGBT power module NTC temperature sensor Copper power terminals, flame‑retardant plastic signal terminals Large DC bus electrolytic capacitors
Structural Characteristics: Vertical DIN rail mounting structure with rear DIN buckle and screw mounting holes Front LED running and fault indicator Upper power wiring terminals, lower control signal terminals Built‑in cooling fan and metal heat sink assembly
Working Principle: Three‑phase AC power passes rectifier circuit to generate DC bus voltage. IGBT power module outputs variable voltage variable frequency three‑phase AC to drive asynchronous motor. VFC open‑loop flux control calculates output voltage and frequency according to speed command without rotor feedback. Regenerative energy from deceleration is consumed by external brake resistor through built‑in brake chopper. Fault triggers hardware shutdown and fault indication.
Installation Requirements: Vertical installation inside closed electrical cabinet, inverted installation forbidden Reserve cooling space and do not block cooling fan air outlet Separate power cable and control cable routing Input voltage matches nameplate rating Avoid dusty, humid and corrosive atmosphere PE protective earth must be securely connected
Precautions for Use: Wait at least 10 minutes after power‑off for capacitor discharge before opening cover for maintenance Confirm input voltage before power‑on Complete motor identification during commissioning Capacitors cannot be paralleled on output side Regular dust cleaning for fan and heat sink Brake terminals cannot be short‑circuited
