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.