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The continuous conduction harassment nominal measuring frequency range of home appliance products 148.5 kHz-30MHz, the actual is 150 kHz-30MHz, the measurement is to be done on power terminal, load terminal and additional terminal. The main source of continuous conduction harassment The switch frequency and harmonic disturbance of switch power supply, the rectifier noise of power rectifier circuit, […]
According to the characteristics of each project, we can divide all the testing projects into three categories and discuss them respectively. They are: electromagnetic disturbance emission category (There are conduction emission and radiation emission.), Harmonic current category, and Transient pulse immunity category (there are electrostatic discharge, electric rapid pulse, surge impact) Countermeasures and corrective actions […]
Fix a position according to measuring curve: Basis: exceeding disturbance frequency range, exceeding disturbance frequency domain distribution, narrow-band harassment or broadband harassment, etc Fix a position according to the measured equipment work mode and internal structure. Have the half-wave rectifier which is not advised to use by standard and symmetric / asymmetric power adjustment circuit […]
Under the condition of not affecting its performance, adjust equipment cable trend and arrangement appropriately; make the different types of cables isolated from each other. Change the ordinary cables of small-signal or high-frequency signal to shielded cable, change the general large current signal or data transmission signal cable to symmetric stranded wire cable. Strengthen the […]