Electromagnetic compatibility design of power meter and the solving methods
Compared with the electric parameters of transmitter power industry monitoring instruments commonly used with the traditional, gradually to the intelligent, integrated, multi-functional direction, and in the electromagnetic compatibility requirements are also high performance (EMS and EMI test were related requirements). The designer how to choose appropriate EMC design, a decisive role on the success or failure of the product design. This paper discussed the design of electromagnetic compatibility of the power monitoring instrument.
The standard interpretation of
1 standard
Combined with the general standard of heavy industrial products, electric power monitoring instrument for power to meet the needs of EMS, EMI and grade is shown in figure 1.
2 standard interpretation
Interference is usually divided into two kinds of interference and transient interference. Such as mobile phone, walkie talkie, radio signal to interference. Because the switch, motor braking power fluctuation caused by such interference, we called the transient interference. Contains the transient interference figure 1: surge SURGE, static ESD, electrical fast transient EFT/B, voltage dips, short interruptions and voltage variations include: DIPS; interference conduction sensitivity CS, RS sensitivity to radiation.
Evaluation of the class A of the &ldquo &rdquo does not decrease; performance; namely, applying interference, no hardware damage, data reduction, no crashes, dropped frames or bit error rate is higher in the process of applying interference, as applied to the products without interference. Usually persistent disturbance evaluation grade are the evaluation grade. The transient interference for incidental, grid disturbance caused by time and reduce the time is not long, the performance, also is the evaluation grade B.
3 EMS test items and interference analysis of