スイッチング強度の絵はおおよそ次のとおりです: 整流 --- スイッチング回路を通して --- 高周波ACへの変換 ---高周波トランスを介した変換 --- 整流, フィルタリング --- 直流. The mains strength we typically use is 50hz, and 50hz AC strength desires to be converted thru a transformer, however the low frequency results in an extended transformer winding, which makes the transformer cumbersome and calls for lots of wires. After turning into a high-frequency alternating current, a exceptionally small transformer may be used to step down, saving value and space.