青云翻译

Prior to the modeling assumptions for the three points: AC small-signal frequency should be much less than the switching frequency (low assumption);

Before modeling for three-point hypothesis: Exchange of small-signal frequency should be much smaller than switching frequency (low frequency assumed);

In front of modelling makes three suppositions: Exchanges the small signal frequency characteristic to be smaller than by far the turn-on frequency (low frequency supposition);

For 3 points in modeling before assuming the frequency small signal: exchange should be far smaller than switching frequency (low-frequency assumptions);

Before modeling for three-point hypothesis: Exchange of small-signal frequency should be much smaller than switching frequency (low frequency assumed);