Analysis of AC stabilized power supply noise performance index
AC stabilized power supply is an important component of power technology, with its input being single-phase or three-phase AC power and its output still being AC power (single-phase or three-phase). According to different working principles, AC stabilized power supplies can be classified into four types: parameter adjustment type, self coupling adjustment type, high-power compensation type, and switch type.
1. Transient sensitivity of power supply
Transient the input power supply voltage from 10% higher than the rated value to 30% higher, and then from 10% lower than the rated value to 30% lower. During the transient process, the performance of the tested power supply equipment is allowed to temporarily decrease, but after 30 seconds of operation after the transient process, it should be able to automatically restore to the normal working state required by the technical conditions.
2. Conducted interference
Operate the power supply equipment under rated conditions and conduct tests using an electromagnetic interference measuring instrument.
3. Repetitive pulse sensitivity (also known as spike interference suppression capability)
Use a spike interference simulator for testing. In general, a 1kw load is used as the testing condition (rated power is used for products below 1kw), and a voltage of 500-4000v with a width of 10 μ m is superimposed on the input power supply? Test the peak pulse of s. Observe the residual pulse voltage at the input of the tested power supply device and represent it as the open circuit voltage value (or attenuation ratio) corresponding to the input spike pulse.
4. Sensitivity of electrical fast transient pulse train (also known as pulse train)
Use a pulse train interference simulator for testing, requiring a pulse train duration of 15ms, a period of 300ms, a single pulse width of 50ns, and a pulse amplitude of 500-4000v.
5. Surge (also known as surge) sensitivity
Using a surge interference simulator for testing, is it required to have a surge waveform pulse width of 50? S (rise time 1? s), Current waveform pulse width 16? S (rise time 6.4? s), The pulse amplitude is 500-4000V.
