EMC (Electronic Compatibility) is a crucial indicator for electronic products to enter the market. Many customers find that certain EMC tests fail when performing EMC tests on the entire device. The most efficient way to improve EMC pass rates is to incorporate EMC design during the new product development phase, paying close attention to critical circuit nodes and selecting appropriate EMC auxiliary components.
I. What are some EMC auxiliary devices?
EMC encompasses both EMI (electromagnetic interference) and EMS (electromagnetic susceptibility). EMC auxiliary devices can be broadly categorized into surge and burst suppression devices, EMI filters, and others. Different performance requirements necessitate different EMC auxiliary devices. For EMI, filtering is the primary focus, while for EMS, protection is the primary focus. If both EMI and EMS performance indicators need to be met simultaneously, then an EMC auxiliary device that combines the functions of both should be selected.
II. Mornsun's EMC Platform
EMC (Electronic Compatibility) is a major headache for many engineers because each stage—circuit design, filtering design, grounding and shielding design, PCB design, and system design—significantly impacts EMC performance. Mornsun has established authorized safety, reliability, and EMC laboratories. Leveraging these platforms, Mornsun can independently complete CE/CB/UL/CSA/TUV and some EMC tests, ensuring the reliability of domestically produced power supplies and providing users with safe and reliable EMC auxiliary devices.
III. How to select an EMC auxiliary device?
Before selecting an EMC auxiliary device, clarifying the EMC standards is of paramount importance. This step requires considering EMC in conjunction with the actual industry equipment application. Especially for special industries, there are strict industry standards, national standards, or international standards for EMC, which means that the EMC auxiliary device itself must also meet the industry-specific requirements.
(1) Industrial Control: FC-LxxWx series EMC auxiliary device suitable for switching power supplies
In the industrial control industry, switching power supplies are widely used, ranging from tens to hundreds of watts. Generally, pre-processing is performed before the switching power supply application, and a matching EMC auxiliary device is selected.
The FC-LxxWx series features common-differential mode rejection up to 55dB@20MHz/75dB@10MHz and surge rejection up to 4KV/6KV (conventional auxiliary devices typically only support 2kV/4kV). It is compatible with Mornsun chassis switching power supplies of the LM series, improving the overall system to meet CISPR32/EN55032 CLASS B standards.
This series not only boasts superior performance but has also obtained CE certification. It offers a variety of packaging options, including basic wiring, metal base plate wiring, and metal rail wiring, making it widely applicable to fields such as high-speed rail power, welding machines, frequency converters, photovoltaic inverters, motor inverters, UPS power supplies, charging piles, and motor control.
(2) Communication: FC-LxxB series ultra-thin EMC auxiliary device
In addition to the EMC auxiliary devices for switching power supplies mentioned above meeting the needs of the industrial control industry, industries such as communications and charging piles also pay attention to indicators such as size and localization rate.
The FC-LxxB series not only boasts a common-mode rejection capability of up to 65dB and a surge rejection capability of up to 2KV/4KV, but also conforms to international standard pin sizes and features an ultra-thin brick-type package. Furthermore, it ensures 100% domestic production of components, making it the preferred choice for improving EMC issues in main power brick-type power supply circuits.
(3) Ships: Classification Society EMC Auxiliary Devices FC-I-CCS Series
For scenarios with stringent reliability requirements, such as ships, wind power, and rail transit, specialized EMC auxiliary devices must be selected. For example, in the shipbuilding industry, the humid application environment requires devices to have double-sided conformal coating, corrosion protection, and salt spray protection, and to meet GD22-2015 10kHz - 30MHz, EMC1, which are performance requirements that conventional EMC auxiliary devices cannot meet.
The FC-I-CCS series meets classification society certifications, offering common-mode suppression up to 40dB and surge suppression up to 4KV/6KV. It also boasts the advantage of 100% domestically produced components, making the equipment safer and more controllable. The FC-I-CCS series is compatible with Mornsun's high-end LIHF series guide rails, directly enhancing the overall system's compliance with classification society application requirements.
IV. Summary
As clock frequencies of modern digital devices using lower signal voltages rapidly increase, electromagnetic compatibility (EMC) issues are becoming increasingly important. Many countries and businesses are paying more attention to equipment safety, and EMC regulations and standards are becoming more comprehensive. Mornsun, as a one-stop power solution provider, is committed to providing safer and more reliable power supplies and related products for various industries.
