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We offer a comprehensive portfolio including resistors, braking units, reactors, power filters, and transformers, with full customization options to meet diverse application requirements.
Modern industrial drive systems use high-speed switching technology to improve energy efficiency and motor control accuracy. However, inverter switching operations may generate conducted interference, common-mode current, and high-frequency noise that can affect surrounding equipment and overall system EMC performance.
Dufew Electric Electromagnetic Compatibility Filter integrates optimized filtering components, including:
- Common-mode chokes
- X/Y safety capacitors
- Filter reactors
- Damping components
The filtering network creates high impedance for unwanted high-frequency interference while maintaining stable power transmission.
Depending on installation requirements, the filter helps control:
- Conducted interference returning to the power supply network
- High-frequency switching noise generated by power electronics
- Common-mode current between equipment and ground
- Electromagnetic disturbance affecting nearby devices
The solution helps:
- Improve electromagnetic compatibility performance
- Reduce interference between connected equipment
- Enhance VFD and servo system stability
- Support reliable industrial operation
Industrial drive systems can generate interference on both the power input and motor output sides. Dufew's integrated filtering structure is designed to reduce conducted emissions, limit high-frequency interference transmission, simplify cabinet integration, and support electromagnetic compatibility within the overall system.
Electromagnetic interference can occur through common-mode paths between electrical circuits and ground, or through differential-mode paths between power conductors. Dufew optimizes magnetic components and capacitor networks to address both interference modes according to the required filtering characteristics.
The filter uses optimized magnetic structures to provide stable impedance characteristics across the required frequency range. The design considers filtering performance, magnetic loss, thermal behavior, and long-term operating conditions for industrial applications.
The filter helps control interference generated by switching power electronics, reducing conducted emissions and electromagnetic disturbance while supporting compatibility between connected equipment.
For inverter-based systems, the filter can help attenuate high-frequency switching noise, common-mode interference, and cable-related electromagnetic radiation, supporting stable operation of motors and other connected electrical equipment.
Dufew designs filtering solutions according to different cabinet and system requirements, with options for compact installation structures, simplified wiring, flexible mounting, and customized electrical parameters.
Dufew Electromagnetic Compatibility Filter is suitable for industrial systems requiring improved interference control.
| Application | Function |
|---|---|
| VFD systems | Reduce conducted and high-frequency interference |
| Servo drives | Improve EMC stability |
| CNC equipment | Reduce electrical noise impact |
| Industrial automation | Improve equipment compatibility |
| Precision equipment | Reduce electromagnetic disturbance |
| Long cable motor systems | Control high-frequency transmission effects |
Typical industries include:
- Industrial automation
- CNC machining
- Manufacturing equipment
- Medical electronics
- Testing systems
- Precision electronic production
Different equipment and applications require different filtering parameters. Dufew Electric provides engineering support based on rated voltage, rated current, switching frequency, cable length, installation environment, and EMC testing requirements to determine suitable filter specifications for industrial power electronics and electromagnetic interference control.
For customized projects, customers can provide equipment parameters, electrical drawings, application conditions, or EMC test requirements for technical evaluation. Dufew Electric supports both standard filter supply and application-specific configurations.
Dufew Electric specializes in industrial power electronics components, including EMC filters, harmonic filters, reactors, braking resistors, and customized electrical components. Its manufacturing processes can cover magnetic core processing, precision winding, insulation treatment, vacuum impregnation, and electrical parameter verification.
Key quality checks may include:
- Insulation resistance testing
- Dielectric withstand testing
- Electrical performance verification
- Temperature rise validation
- Final quality inspection
Dufew Electric supports OEM manufacturing, customized filter development, engineering application support, and industrial project cooperation, with product specifications and testing requirements adjusted according to the application and customer requirements.
| Parameter | Specification |
|---|---|
| Rated Voltage | 220VAC / 380VAC / 690VAC / 1140VAC |
| Operating Frequency | 50Hz / 60Hz / Customized |
| Rated Current | 5A-1600A |
| Filter Type | EMC Input / Output Filtering Solution |
| Dielectric Strength | Line-to-line: 1500VDC / 60S; Line-to-ground: 2500VDC / 60S |
| Insulation Resistance | ≥100MΩ |
| Overload Capability | 1.4× rated current for 1 minute |
| Protection Grade | IP00 / IP20 |
| Insulation Class | Class F (155℃) |
| Flame Retardant Grade | UL94V-2 |
| Comparison | Integrated EMC Filter | Standard EMI Filter |
|---|---|---|
| Filtering Position | Input and output system protection | Mainly input-side filtering |
| Main Function | Controls system-level electromagnetic interference | Reduces conducted noise |
| Application | VFD and industrial drive systems | General electronic equipment |
| Structure | Integrated filtering solution | Single filtering circuit |
| Motor System Compatibility | Suitable for complex industrial applications | Mainly equipment-level protection |
An Electromagnetic Compatibility Filter reduces conducted electromagnetic interference generated by power electronic equipment and helps improve system EMC performance.
Selection depends on rated voltage, current capacity, switching characteristics, cable configuration, installation environment, and required EMC performance.
The installation location depends on system requirements. Input-side filtering helps reduce interference transmitted to the power network, while output-side filtering helps control high-frequency noise generated during inverter operation.
Yes. Dufew provides customized EMC filtering designs according to electrical parameters, application conditions, cabinet requirements, and project specifications.
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No. 364, Kangyang Road, Huangdai Town, Xiangcheng District, Suzhou City, Jiangsu Province, China
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