G) Common product immunity standards and test methods (161 pages) Chapter 3 Common product immunity standards and test methods 2004.6.23QIANZHENYU1 This chapter mainly describes eight immunity tests, including electrostatic discharge, radio frequency radiation electromagnetic field, electric fast transient pulse group, lightning surge, conducted interference caused by radio frequency field, power frequency magnetic field, voltage drop and attenuated oscillation wave. The first seven tests have been seen in the general immunity standards; the last test (attenuated oscillation wave immunity test) can often be seen in the immunity test of power system equipment. Considering the high-frequency noise simulators often used in domestic enterprises that introduce and produce household appliances, this chapter provides additional introduction. In addition, the rapid development of the automobile industry in my country has driven the rapid development of the supporting automotive electronics and electrical appliances industry. The quality control and inspection issues of the latter have become a hot topic of concern to industry insiders. Therefore, the last section of this chapter will introduce the ISO7637 standard to which it applies. In the introduction to the standard, the focus is on explaining why these tests are done, the requirements for instrument characteristics, the necessary test configuration, the standard test methods, and the understanding and comments on the standard, in an effort to deepen the reader\'s understanding of the standard. For more detailed information about the standard, please refer to the corresponding basic standard. 2004.6.23QIANZHENYU2 3.1 Electrostatic Discharge Immunity Test The national standard for electrostatic discharge immunity test is GB/T17626.2 (equivalent to the international standard IEC61000-4-2). 3.1.1 Generation and harm of static electricity Electrostatic discharge is a natural phenomenon. When two materials with different dielectric strengths rub against each other, static electricity will be generated. When the static electricity on one of the materials accumulates to a certain extent, when it comes into contact with another object, it will discharge through the impedance of the object to the ground. Electrostatic discharge and its effects are a major source of interference for electronic equipment. Experience shows that when a person walks on a synthetic fiber carpet, through the friction between the shoes and the carpet, as long as he walks a few steps, the accumulated charge on the human body can reach 10...
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