EMI Filter Applications & EMC Solutions
DOREXS provides EMI filters and EMC solutions for industrial automation, medical equipment, EV charging systems, communication equipment, home appliances, military electronics, and other noise-sensitive applications.
We offer single-phase, three-phase, DC, IEC inlet, feed-through, and custom EMI filters designed to suppress conducted interference, enhance system stability, and ensure excellent EMC performance in demanding electrical and electronic environments.
EMI Filter Solutions by Industry
Different applications generate different types and levels of electromagnetic interference. Switching power supplies, motor drives, power converters, inverters, communication circuits, and high-frequency electronics can all introduce conducted or radiated noise into electrical systems.
DOREXS provides application-specific EMI filtering solutions based on equipment type, operating voltage, current, noise characteristics, installation environment, and EMC requirements.
Industrial Automation
DOREXS EMI filters help suppress conducted noise generated by switching power supplies, servo drives, PLC systems, industrial motor controllers, and automated machinery.
Suitable filtering can improve EMC performance and reduce interference affecting control systems, sensors, communication networks, and other sensitive electronics in demanding industrial automation environments.
Recommended Solutions:
Three Phase EMI Filters · Single Phase EMI Filters · VFD EMI Filters
VFD & Motor Drive Systems
Variable frequency drives, servo amplifiers, inverters, and motor controllers use high-frequency switching technologies that can generate significant common-mode and differential-mode interference.
DOREXS EMI filters can be installed on the power input side of motor drive systems to help reduce conducted emissions, protect nearby control electronics, and improve overall EMC performance in industrial machinery and motion-control systems.
Typical Applications:
VFDs · Servo Drives · CNC Machines · Pumps · Compressors · Conveyor Systems
Recommended Solutions:
Three Phase EMI Filters · High Performance EMI Filters · Custom EMC Filters
Medical Equipment
Medical electronics often combine sensitive measurement circuits, switching power supplies, displays, motors, communication interfaces, and compact power systems within the same equipment.
DOREXS medical EMI filters help reduce conducted interference while supporting applications where low leakage current, stable electrical performance, compact installation, and reliable EMC behavior are important.
Recommended Solutions:
Low Leakage EMI Filters · IEC Inlet EMI Filters · Single Phase Medical EMI Filters
EV Charging Systems
EV charging equipment uses high-power AC/DC conversion, DC/DC converters, switching devices, and communication systems that can create complex EMI paths on both AC and DC power lines.
DOREXS provides AC, three-phase, high-current DC, and custom EMI filter solutions for EV chargers and related power conversion equipment, helping reduce conducted noise and improve system stability in high-power charging environments.
Typical Applications:
AC Chargers · DC Fast Chargers · Charging Modules · On-Board Chargers · Energy Storage Systems
Recommended Solutions:
Three Phase EMI Filters · High-Voltage DC EMI Filters · Multi-Stage EMI Filters · Custom EMI Filters
Communication & Data Centers
Communication equipment depends on stable power and reliable signal transmission. Switching power supplies, server power systems, rectifiers, UPS equipment, and high-frequency electronic circuits can introduce EMI that affects sensitive communication and control electronics.
DOREXS EMI filters help reduce power-line interference and support reliable operation in telecommunications, networking, server, and data infrastructure applications.
Typical Applications:
5G / 4G Base Stations · Servers · Data Centers · Communication Power Supplies · UPS Systems · Network Equipment
Recommended Solutions:
DC EMI Filters · PCB EMI Filters · Single Phase EMI Filters · Feedthrough Filters
Home Appliances
Modern home appliances increasingly use inverter drives, BLDC motors, switching power supplies, wireless modules, and intelligent control electronics.
DOREXS EMI filters help suppress noise generated by motors, compressors, inverters, and power conversion circuits, supporting stable EMC performance in household and smart home appliances.
Typical Applications:
Washing Machines · Air Conditioners · Refrigerators · Induction Cookers · Microwave Ovens · Smart Home Equipment
Recommended Solutions:
Single Phase EMI Filters · IEC Inlet EMI Filters · PCB EMI Filters · DC EMI Filters
Military & Defense Electronics
Military and defense electronic systems often operate in complex electromagnetic environments where power electronics, communication systems, radar equipment, and sensitive control circuits may operate close to each other.
DOREXS provides high-performance and custom EMI filter solutions for demanding power and electronic systems requiring enhanced interference suppression, robust construction, and application-specific electrical or mechanical design.
Recommended Solutions:
High Performance EMI Filters · DC EMI Filters · Feedthrough Filters · Custom EMI Filters
Building Automation & HVAC
Building automation systems increasingly combine VFDs, elevators, pumps, HVAC drives, controllers, communication networks, and intelligent power electronics.
EMI generated by motor drives and switching power systems can affect controllers, sensors, building communication systems, and other connected equipment.
DOREXS EMI filters help reduce conducted interference and improve EMC performance in commercial and industrial building systems.
Typical Applications:
Elevators · HVAC Systems · Pumps · Ventilation Equipment · Building Controllers · Smart Building Systems
Recommended Solutions:
Three Phase EMI Filters · VFD EMI Filters · Single Phase EMI Filters
Common EMI Challenges Across Applications
Conducted Emissions
Radiated Interference
Communication Interference
EMC Compliance Problems
System Instability
Switching power supplies, VFDs, inverters, converters, and motor drives can inject high-frequency noise into AC or DC power lines.
High-frequency switching, long cables, poor grounding, and insufficient shielding can create radiated electromagnetic interference that affects nearby electronic equipment.
EMI can disturb sensitive communication interfaces and control networks used in industrial, EV, communication, and intelligent electronic systems.
Equipment may perform normally during basic operation but exceed conducted or radiated emission limits during EMC testing.
Severe EMI can contribute to unexpected resets, control errors, sensor interference, communication problems, and unstable operation.
EMI Filter Solutions for Different Applications
DOREXS provides multiple EMI filter configurations to match different power systems, installation methods, current levels, and EMC requirements.
Single Phase EMI Filters
Three Phase EMI Filters
IEC Inlet EMI Filters
Designed for single-phase AC equipment such as industrial controllers, power supplies, home appliances, laboratory equipment, medical electronics, and general electronic systems.
Designed for industrial three-phase power systems where VFDs, servo drives, motor controllers, power converters, and high-power machinery generate significant electrical noise.
Compact EMI filtering solutions integrated with IEC power entry configurations for equipment requiring convenient panel-mounted AC input and interference suppression.
DC EMI Filters
Designed to suppress conducted interference on DC power lines generated by converters, switching circuits, communication power supplies, EV charging equipment, and other DC electronic systems.
PCB EMI Filters
Compact board-level filtering solutions for electronic control modules and equipment requiring EMI suppression close to the power input or sensitive circuitry.
Feedthrough EMI Filters
Feedthrough filters provide effective high-frequency interference suppression where power or signal lines pass through shielded enclosures.
Custom EMI & EMC Solutions
Different equipment manufacturers face different electrical and electromagnetic environments.
For projects where a standard EMI filter does not fully meet the requirement, DOREXS provides application-specific custom solutions covering electrical performance and mechanical integration.
To help our engineers evaluate your application, provide:
Operating Voltage + Rated Current + Equipment Type + EMC Problem + Installation Space
Additional information such as existing EMC test results, circuit diagrams, wiring layout, or required attenuation performance can further improve filter selection.
Why Choose DOREXS for EMI/EMC Applications?
DOREXS combines EMI filter manufacturing with application-oriented engineering support to help equipment manufacturers address different EMC requirements.
Broad EMI Filter Range
Single-phase, three-phase, IEC inlet, DC, PCB, feedthrough, medical, high-performance, and custom EMI filtering solutions.
Application Engineering Support
Filter selection based on equipment type, electrical parameters, EMC problems, and installation requirements.
Custom Design Capability
Electrical and mechanical customization for applications where standard products do not meet project requirements.
Quality & Electrical Testing
Product inspection and electrical testing may include: electrical performance testing, withstand voltage (Hipot) testing, leakage current testing, insertion loss verification, visual and mechanical structure inspection, and compliance support.
Compliance Support
Selected product series are available with applicable certification and compliance options according to product type and market requirements.
Need an EMI Filter for Your Application?
Not sure which EMI filter is suitable for your equipment?
Send us your basic application information:
Voltage
Current
Equipment Type
EMC Problem
Installation Space
Our engineering team can help evaluate your requirements and recommend a suitable standard or custom EMI filtering solution.