Lossless active snubber for half-bridge output rectifiers
作者： Fu Sheng Tsai , Dhaval B Dalal
DOI:
关键词: Electrical engineering 、 Physics 、 Diode 、 Voltage 、 Half bridge 、 Snubber 、 Voltage source 、 Lossless compression 、 Waveform 、 Transformer
摘要: A bridge-type primary switching circuit (12) is represented by a pulsed voltage source (VSW). The switched waveform transformed to secondary (14) using transformer (T1) with the required turns ratio N and center-tapped winding (16). Half-bridge rectifier (18) formed diodes (DR1) (DR2) rectifies feeds through low-pass filter (LF) (CF) obtain desired DC output voltage. snubber (20) switch-diode-capacitor combinations (SA-DS1-CS1) (SB-DS2-CS2) across each (DR2). Capacitances (CS1) (CS2) are selected large enough such that their voltages remain essentially constant during cycle. controlled switches (SA) (SB) turned ON specific delay after reaches magnitude close input in order allow be commutated. It crucial OFF before collapses zero avoid current spikes switches.
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