Ups filter and rectifier, respectively, what specific role, said on the Internet filter (filter), is a device used to eliminate interference noise, the input or output filtered through the pure DC. Rectifier will exchange into DC, since the filters have been pure DC, followed by a rectifier in turn to DC? Here is more puzzled?
The Of course, active filter filtering is much better than passive filter filtering, it can limit the current harmonic components within 3%. This is basically no effect on the grid, this filter is effective but expensive.
Ups in the rectifier at the front of the filter is the exchange of clutter, there is no rectification effect. Rectifier from the role of DC conversion, so some rectifier rectifier after the waveform is not stable but a change in the value of the voltage and the structure of the rectifier, you can use the oscilloscope to observe the changes in the wave head, so the To pure DC after rectification in the filter
This filter is simple and economical, widely used by manufacturers in high-power UPS, the suppression of current harmonic components in the range of 5% to 6%, the power grid is more or less affected, if the precision Instrument, it is possible to measure the work of instability, there *, the reading is not allowed to wait for such phenomena.
In the UPS input to install passive filter and active filter is mainly to prevent *, inhibit the input current harmonic components. Commonly used passive filter is generally composed of R, L, C frequency selection of the selected network, it can selectively attenuate the input signal does not need the frequency components, effectively play a filtering role, the grid also play a filter effect
