电磁兼容性( EMC )指电气设备或系统运行时,对其所处的电磁环境不产生干扰或抵抗电磁环境干扰的能力。 EMC 是评价产品质量好坏的重要标准之一。为了以最为经济的方式保证产品的 EMC 质量,应该在产品设计初期采取适当的措施。根据定义， EMC 被分为电磁干扰( EMI )、电磁抗扰度或敏感度( EMS )。法规规定应满足 EMI 的最大值和 EMS 最小值。相关标准中对于可用的限值、采用的测量方法和仪器都作出了规定。
电磁兼容性( EMC )指电气设备或系统运行时,对其所处的电磁环境不产生干扰或抵抗电磁环境干扰的能力。 EMC 是评价产品质量好坏的重要标准之一。为了以最为经济的方式保证产品的 EMC 质量,应该在产品设计初期采取适当的···
This standard specifies the general requirements for the basic safety and essential performance of Medical Electrical Equipment (ME Equipment) and Medical Electrical Systems (ME Systems). It is applicable to the design, production, inspection, and use of various medical electrical equipment. Compared with the previous edition, the new version introduces the concept of risk management, making the safety testing requirements more systematic and rigorous.
Active medical devices rely on electrical energy and act directly on the human body, with safety requirements far exceeding those of ordinary electronic equipment. Insufficient electromagnetic compatibility may interfere with the operation of other instruments, leading to device malfunction or data distortion, directly threatening patient safety. EMC testing systematically verifies the electromagnetic compatibility of devices, building a full-chain quality defense from design to use, serving as the "technical gatekeeper" for ensuring device safety and effectiveness.
Electromagnetic Compatibility (EMC) refers to the ability of equipment or systems to operate normally in their electromagnetic environment without generating unacceptable electromagnetic interference to other devices in that environment. Its core consists of two interrelated requirements: first, controlling the electromagnetic interference (EMI) generated by the equipment itself; second, enhancing the equipment's immunity to external electromagnetic interference (Electromagnetic Susceptibility, EMS).
The core essence of Electromagnetic Compatibility (EMC) refers to the ability of electronic equipment to function normally in an electromagnetic environment without causing interference to other devices. As a technical means to evaluate this capability, EMC testing verifies the electromagnetic compatibility of equipment through scientific methods, serving as a crucial technical link to ensure the collaborative operation of electronic systems.
Household PV-storage-charging products integrate various power electronic devices such as photovoltaic inverters, power conversion systems (PCS), and charging modules. Their internal high-frequency switching actions (e.g., IGBT switching frequency harmonics) and complex topologies are prone to generate electromagnetic interference (EMI). Core components within such equipment (such as high-frequency switching transistors, inductors, capacitors, and control circuit boards) produce high-frequency harmonics and switching noise during operation, which may form electromagnetic disturbances through conduction or radiation paths.
With the rapid development of 5G communication technology and the Internet of Things (IoT), wireless interconnection functions of electronic devices have become widely popular in smart home appliances, leading to an increasingly complex electromagnetic environment. Household appliances (such as refrigerators, air conditioners, washing machines, etc.), due to the integration of wireless modules like Wi-Fi and Bluetooth, may not only generate high-frequency noise or conducted interference during operation but also need to resist electromagnetic radiation from mobile phone base stations and other smart devices, making their Electromagnetic Compatibility (EMC) issues increasingly prominent.
Electromagnetic Compatibility (EMC) refers to the ability of electronic equipment or systems to function properly in their electromagnetic environment without causing unacceptable electromagnetic disturbances to anything in that environment. Its core encompasses two interrelated technical dimensions: Electromagnetic Interference (EMI) and Electromagnetic Susceptibility (EMS). EMI refers to the electromagnetic disturbances released by equipment during operation into the surrounding environment, while EMS refers to the equipment's ability to resist external electromagnetic disturbances.
Modern military equipment is highly dependent on electronic systems, from navigation and positioning, communication and command, to precision-guided weapons. Electromagnetic interference can directly weaken combat capabilities by blocking spectrum, misleading signals, or causing physical damage.
In recent years, the low-altitude aircraft industry has experienced explosive growth, with its application scenarios rapidly expanding from traditional military fields to more than 20 vertical sectors including civilian logistics, agricultural plant protection, urban security, and emergency rescue. According to statistics from the Civil Aviation Administration of China, the average daily flights of low-altitude aircraft surged from 120,000 in 2023 to 850,000 in 2025, with an average annual growth rate of 38%. It is projected that the global low-altitude economy market size will exceed $2.1 trillion by 2030.
As the core component of the power distribution system in new energy vehicles, the electromagnetic compatibility (EMC) of the Vehicle PDU (High Voltage Power Distribution Unit) is directly related to the safety and reliability of the entire vehicle. This article systematically analyzes the necessity of EMC testing, including regulatory compliance requirements, product reliability assurance, and market access needs. It provides a detailed comparison of the latest domestic and international standard systems (such as CISPR 25:2021 and GB/T 18655-2025), elaborates on core test items such as conducted emissions, radiated emissions, radiated immunity, and bulk current injection (BCI).
