A leading medical device manufacturer approached us to assist with electromagnetic compatibility (EMC) testing for their new medical instrument. Ensuring compliance with international EMC standards was critical for market approval and patient safety.

Nickel Core Ferrite: a magnetic material composed of nickel, iron, and other metal oxides, has attracted widespread attention in the field of electronic devices in recent years. Its unique magnetic properties and wide range of applications have made it a key material in the electronics industry.

Ferrite cores are an indispensable part of modern electronics and electrical engineering. Whether you realize it or not, they are everywhere, from simple power adapters to complex communication devices. So, what exactly are ferrite cores, and why are they so important? Next, the editorial team from Weiaipu Electronics, specializing in power filters, will uncover the mysteries of ferrite cores for you.

I. Definition of Ferrite Cores

Ferrite is a special type of ceramic material primarily composed of iron and oxygen, with high magnetic permeability and low electrical conductivity. The magnetic core made from this material is what we refer to as a ferrite core.

Power filters are essential components in electronic devices, with the main function of filtering the input power signal to remove noise and other interference, providing a stable and smooth direct current or alternating current voltage to ensure the normal operation of electronic devices. Power filters are widely used in electronic products, especially in high-end electronic products that require signal stability, reliability, and safety.

In addition to the main functions and roles mentioned above, power filters can also serve the following purposes:


Filter out high-frequency noise in the input power, reduce interference to the system, and minimize electromagnetic radiation.
Prevent transient changes in the power supply circuit to avoid impacting the system.
Avoid sudden surges in the power line to enhance system reliability and stability.

Power filters can to some extent address device interference issues, but the specific effectiveness depends on factors such as the characteristics of the interference source, filter design, and application environment. Below, the VIA power filter editor will first explain the definition and causes of electromagnetic interference, and then discuss in detail the strategies for suppressing electromagnetic interference, including power filters, coupling of external interference, switch tubes, transformers, diodes, energy storage inductors, as well as PCB layout and routing.

Recently, a prominent vending machine manufacturer faced multiple challenges in achieving EMC compliance. Through rigorous testing—three separate EMC evaluations—they identified areas requiring targeted improvements. Our dedicated team collaborated closely with their engineers, offering expert guidance and technical solutions to address EMI (Electromagnetic Interference) issues.

Strategic Intervention and Technical Excellence

Our engineers conducted a thorough analysis of the device’s electromagnetic emissions and susceptibility. Based on these insights, we recommended and assisted in implementing effective mitigation measures—such as the addition of ferrite beads and filtering circuits—to critical signal and power lines. These targeted modifications significantly reduced conducted and radiated EMI, enabling the product to meet stringent EMC standards.

Throughout the process, we provided iterative testing support, ensuring each adjustment achieved the desired compliance. Our expertise ensured minimal delays and optimized design modifications, ultimately enabling the product to pass the latest EMC tests.

In today's world, where electronic devices are highly prevalent, the importance of electromagnetic compatibility (EMC) issues is becoming increasingly evident. With the rapid development of technology, the mutual interference between electronic devices and the electromagnetic radiation they emit into the environment have become bottlenecks that restrict the performance enhancement and stable operation of electronic devices. In this context, VIIP ELECTRONICS EMC filters play a crucial role as an important means of ensuring electromagnetic compatibility.

The EMC Challenge: How We Saved a Failing Single-Phase Power Filter

When an industrial automation company approached us in a panic, their situation was dire. Their single-phase power filter—a critical component for protecting sensitive medical imaging equipment—had failed EMC testing three times at a certified lab. With their product launch deadline looming and penalties mounting, they needed a miracle.

Comprehensive Interpretation of Single-Phase Filters: From Basics to Applications | Power Filter – Shenzhen VIIP electrics company

In daily electronic devices, filters play a crucial role as they determine the performance and stability of many devices. Among them, single-phase filters, due to their unique characteristics and wide applications, have become essential knowledge for electronic engineers. In this article, the VIIP electrics team will provide a comprehensive interpretation of the principles, types, applications, and the importance of single-phase filters in real-life scenarios.

I. Basic Principles of Single-Phase Filters As the name suggests, a single-phase filter is a filter that processes a single-phase signal. Its main purpose is to allow specific frequency signals to pass through while blocking or attenuating signals of other frequencies.

In daily electronic devices, filters play a crucial role as they determine the performance and stability of many devices. Among them, single-phase filters, due to their unique characteristics and wide applications, have become essential knowledge for electronic engineers. In this article, the VIIP electrics team will provide a comprehensive interpretation of the principles, types, applications, and the importance of single-phase filters in real-life scenarios.

Magnetic rings, as key components in electronic devices, directly impact the stability and efficiency of the entire system. When discussing the performance of magnetic rings, people often focus on core parameters such as material and permeability, while the seemingly simple physical attribute of weight is often overlooked. However, there exists a subtle and complex relationship between the weight of magnetic rings and their performance.

The choice of magnetic ring material has a significant impact on EMC performance, as different materials possess varying permeability and frequency characteristics. These properties determine the material's ability to suppress interference at different frequencies. Materials such as ferrites, nickel-zinc ferrites, and nickel ferrites with high permeability and low frequency characteristics are effective in suppressing high-frequency interference and are suitable for EMC protection in high-frequency circuits.