Industrial EMI Solutions: EMI Filters and Power Quality in Industry
DOREXS is a professional electromagnetic interference solution company that provides high-performance EMI filters and EMC solutions for the industrial automation industry. It helps automation equipment to operate stably and reliably in complex electromagnetic environments, ensuring production efficiency and equipment safety. Our EMI filter products have been widely used in industrial scenarios such as servo drives, motor control, robots, machine tools, and conveying systems.
With the continuous improvement of intelligent manufacturing and automation levels, high-frequency inverters, servo drives, PLC control systems, etc. in industrial equipment will generate a large amount of electromagnetic interference (EMI), which not only affects the stability of the equipment itself, but may also cause failure of peripheral systems and even cause safety accidents.
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DOREXS EMI filters can effectively suppress conducted and radiated interference, meet the stringent requirements of industrial environments for electromagnetic compatibility (EMC), and help companies pass compliance certifications in global markets (such as CE, UL).
Applicable Equipment and Typical Applications
Servo motors and servo drives
VFDs and soft starters
Industrial robots and robotic arms
Automated conveying and packaging lines
Precision machining machine tools
Industrial power supplies and control cabinets
Recommended Product Series
Suitable for low-power control modules, small drives, or signal devices in industrial automation, ensuring stable system operation.
Suitable for high-power load equipment in industrial automation, especially inverters and servo systems, providing excellent common-mode and differential-mode interference suppression.
Provides customized services for specific equipment or complex operating conditions, including customization of current, voltage, interfaces, and dimensions.
EMI Filters Designed for Industrial Use
EMI (electromagnetic interference) filters are a common solution for suppressing high-frequency noise in industrial equipment. They provide suppression of electromagnetic interference at specific frequencies by introducing specific inductive and capacitive components into the circuit.
The working principle of EMI filters is to guide high-frequency noise to ground or other low-impedance paths, thereby reducing its impact on the circuit. At what frequency an EMI filter is most effective depends on the different filter types and designs. Generally speaking, EMI filters can effectively suppress noise in the frequency range from a few kilohertz (kHz) to a few hundred megahertz (MHz).
Generally speaking, the effect of EMI filters is more significant in the high frequency band (hundreds of kilohertz to hundreds of megahertz). This is because common noise sources in industrial equipment, such as switching power supplies, frequency converters and signal transmission equipment, often produce strong electromagnetic interference in higher frequency ranges. Therefore, when selecting an EMI filter, it should be matched according to the high-frequency noise frequency of the specific device to achieve the best suppression effect.
It is important to note that the noise frequency characteristics of each industrial equipment may be slightly different, so the most effective suppression frequencies may vary. In a specific application, it is best to perform EMI testing and filter evaluation to find the best filter solution for your equipment.
Request a quote or contact us today to learn more about our high-performance, flexible designs and reliable industrial EMI filters!
Typical applications
Servo motors and servo drives
VFDs and soft starters
Industrial robots and robotic arms
Automated conveying and packaging lines
Precision machining machine tools
Industrial power supplies and control cabinets
Compliance and Certification
Compliance with international standards for electromagnetic compatibility (EMC) is a cornerstone of modern industrial automation systems. As industries increasingly rely on high-performance equipment such as variable frequency drives, servo drives, and robotic arms, the need to control electromagnetic interference (EMI) and high frequency noise becomes more critical than ever. Adhering to standards like IEC 60939, EN 55011, EN 55032, and CISPR 22/25 is essential to ensure uninterrupted operation, signal integrity, and the overall efficiency of industrial systems.
How to Choose the Right Industrial EMI Filter
Parameter selection
1. Current/voltage level: match the rated voltage and current of the device.
2. Insertion loss: select the appropriate attenuation performance according to the EMI spectrum.
3. Common mode vs. differential mode filtering: determine the main interference type of the device and select the corresponding filter.
Recommended selection
Device type——Recommended EMI filter
Inverter——Three-phase EMI filter
Medical Equipment - Low Leakage Current EMI Filters
Robotics control——High attenuation EMI filter
Switching mode power supply——Single-phase/three-phase EMI filter
Contact us for further recommendations on selecting industrial EMI filters...
Why Choose DOREXS Industrial EMI Filters
DOREXS’s industrial EMI filters can provide efficient and stable EMI suppression in complex electromagnetic environments.
First, these filters adopt a bipolar or multi-stage filtering circuit design, which can effectively reduce common mode (CM) and differential mode (DM) interference, provide high attenuation performance in the 10kHz to 30MHz frequency band, and ensure the purity of the power supply signal.
Second, they support a wide range of voltage and current, suitable for single-phase and three-phase AC power supplies (110V to 690V), and DC power supplies (12V to 1000V). The rated current covers 1A to 2000A, which can meet different application requirements from small control equipment to large industrial systems.
In terms of electromagnetic compatibility, industrial EMI filters comply with international EMC standards and have passed multiple international certifications such as UL, CE, ROHS, ISO9001, CQC, and meet industry standards such as IEC 60939, EN 55011, EN 55032, CISPR 22/25, ensuring regulatory compliance in the global market.
In addition, these filters have excellent reliability and durability. High-quality electronic components (such as X/Y capacitors and common-mode inductors) are used to ensure long-term stable operation, and can adapt to high temperature environments from -40°C to 85°C, high humidity conditions of 95% RH, and industrial-grade vibration environments to meet the needs of stringent industrial applications.
Finally, in order to facilitate integration into different industrial systems, industrial EMI filters provide a variety of installation methods, including DIN rail mounting, screw fixing, and PCB welding, with strong compatibility. In addition, its compact structural design makes it suitable for space-constrained industrial control cabinets, variable frequency drives, power supply systems and other application scenarios.
DOREXS also has expertise in providing EMI and RFI solutions specifically tailored for lighting applications in industries such as electronics, aerospace, and medical.
Purchase Industrial EMI Filters from DOREXS
DOREXS is committed to providing efficient, reliable and cost-effective EMI filter solutions for various industrial applications. We provide standard models available from stock, all of which are certified by international authorities and fully meet the electromagnetic compatibility (EMC) and safety compliance requirements of industrial equipment.
For customized models, we are equipped with certified in-house safety testing laboratories to quickly complete product testing and certification in accordance with UL, CE and other standards for markets such as the United States, Europe, and Canada, speeding up project delivery cycles and reducing compliance risks.
Welcome to contact us now to get professional quotes and technical support for high-performance EMI filters.
Our team of engineers will tailor EMI suppression solutions for your automation system to help you achieve stable, safe and efficient production operations.
DOREXS is an expert in electromagnetic solutions, making your equipment (brand) more competitive in the market.