Product Description: SEW 31C220-503-4-00 Frequency Converter

Model: 31C220-503-4-00

Brand: SEW SAEW

Series: MOVITRAC 31C

Rated Power: 22 kW

Input Power Supply: Three-phase 380~500V, 50/60Hz

Rated Output Current: 47 A

Version Code: 00 (General Standard Version) 

I. Product Overview

31C220-503-4-00 is a 22kW high-power general-purpose vector frequency converter of the SEW 31C series. It adopts V/F and sensorless vector control (VFC) dual modes, featuring strong heavy-load starting and low-speed torque output capabilities. It is equipped with a braking unit and is specifically designed for heavy-load drive in industrial environments.

II. Core Technical Parameters

Control Mode: V/F Control + Sensorless Vector Control (VFC)

Overload Capacity: 150% rated current, lasting for 60 seconds

Output Frequency: 0–400 Hz

Carrier Frequency: Up to 16 kHz

Braking Function: Built-in braking chopper, supporting rapid energy consumption braking

Standard Communication: RS485, Modbus RTU

Protection Grade: IP20 (installed in cabinet)

Cooling Method: Forced air cooling

Operating Temperature Range: 0°C ~ +45°C (no capacity reduction)

Dimensions (W×H×D): 220 × 405 × 265 mm

Weight: 13 kg

III. Core Functional Characteristics

High-performance Vector Control: Sensorless vector control, achieving 150% rated torque output at 0.5Hz, smooth and impact-free starting.

Optimized PWM Modulation: Using SVPWM space vector modulation, high utilization of DC bus, low motor harmonics, low noise, and low temperature rise.

Built-in Intelligent PID: Supports closed-loop process control, directly applicable to automatic regulation systems such as constant pressure water supply, constant current, and constant temperature.

Multiple Speeds and Program Execution: 16 programmable multi-speed control, supporting automatic switching of complex process flows.

Mechanical Resonance Suppression: 3 sets of adjustable jump frequencies, effectively avoiding mechanical system resonance points.

Comprehensive Protection Mechanism: Integrated overcurrent, overvoltage, undervoltage, output short circuit, grounding fault, motor overload, and heat sink overheat protection.

Parameter Management Convenience: Supports parameter copying on the operation panel and PC software (DriveStudio) debugging, efficient batch configuration.

Extensive Expansion Capability: Can be extended through optional cards for industrial fieldbus such as PROFIBUS, CANopen, and DeviceNet.

IV. Typical Application Domains

Heavy-duty Material Transportation: Large belt conveyors, scraper conveyors, bucket elevators

Fan and Pump Energy Saving: High-power industrial fans, centrifugal pumps, compressors

Machine Tools and Processing Equipment: Heavy-duty lathes, milling machines, grinding machines main drives

Light Industry Machinery: Textile, printing, packaging, plastic machinery

Metallurgy, Mining, Construction Materials: Rolling mill auxiliary drives, crushing and screening equipment

V. Power Comparison of the Same Series

31C150-503-4-00: 15 kW

31C220-503-4-00: 22 kW (current model)

31C300-503-4-00: 30 kW

VI. Product Advantages

SEW Original Quality, Industrial-grade Reliability, Suitable for Long-Term Full-Load Operation

High Vector Control Accuracy, Wide Speed Regulation Range, Good Low-Speed Stability, Significant Energy-saving Effect

Compact Structure, Excellent Heat Dissipation Design, Stable Operation at High Ambient Temperatures

Standard Interfaces, Strong Compatibility, Easy Integration with Various PLCs, HMI Systems

Global Service Network, Complete Technical Support, Adequate Spare Parts Supply