SINEE EM303A‑037G/045P‑3C AC Drive Unit

Module Feature

EM303A‑037G/045P‑3C is SINEE EM303A general‑purpose vector inverter. G stands for heavy load 37kW, P stands for light load 45kW, 3‑phase 380V input. It supports sensorless vector control, built‑in multiple protection functions, and Modbus RTU communication via RS485. Widely used for fans, pumps and common conveyor speed regulation.

Working principle

The rectifier converts AC power into DC. IGBT power unit outputs variable frequency and variable voltage three‑phase AC. SVC vector algorithm adjusts output torque and frequency to realize stable motor speed regulation.

Onboard components

Rectifier bridge, DC electrolytic capacitors, IGBT power module, control mainboard, RS485 communication circuit, cooling fan, operation panel and metal housing.

LED indicators

LEDs display power, running and fault state; fault codes are shown on local panel.

Hardware self‑diagnosis

Detect overcurrent, overvoltage, undervoltage, overheat, phase loss and motor overload, read fault codes on the keypad.

Programming software

Parameter commissioning through local keypad or SINEE dedicated drive software.

Electrical & Process Parameters

Model:EM303A‑037G/045P‑3C Brand:SINEE Device type:3‑Phase Vector Frequency Inverter Heavy duty:37kW Light duty:45kW Voltage:3AC 380V Control mode:SVC sensorless vector / V/F Communication:RS485 Modbus RTU Function:Three‑phase asynchronous motor speed control

Mechanical & Structure

Mounting:Cabinet vertical panel mounting Protection class:IP20 Housing:Metal housing

Environmental

Operating temperature:-10℃ ~ +40℃ Storage temperature:-40℃ ~ +85℃ Ambient humidity:5~95% non‑condensing Certification:CE industrial drive compliant Status: SINEE original EM303A series inverter

Installation

Install vertically inside cabinet, reserve ventilation space. Separate power cable and control cable. Set motor rated parameters and ramp time before trial run.

Interface

Three‑phase power input terminals, motor output terminals, analog & digital I/O terminals, RS485 communication port, keypad port.

Diagnostic

Overcurrent fault: motor overload, short circuit or grounding. Overtemperature: fan failure or blocked air duct. Communication interruption: wrong Modbus address or loose 485 wiring.

Product Brief

SINEE EM303A‑037G/045P‑3C dual‑rating vector inverter, provides stable speed regulation for pumps, fans and general industrial motors.