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Converter having low loss snubber

專利號
US10097081B1
公開日期
2018-10-09
申請人
ACBEL POLYTECH INC.（TW New Taipei）
發(fā)明人
James D. Bucher, II; Alan D. Lauer; Emma C. Trzynka; Jason C. Dehn
IPC分類
H02M1/34; H02M3/335; H02M1/44
技術(shù)領(lǐng)域
winding,wp,capacitor,diode,snubber,ws,voltage,primary,output,first
地域： New Taipei

摘要

The present application is a converter having a low loss snubber. The low loss snubber of the converter includes a clamping winding, a first capacitor, and a second capacitor. The clamping winding is magnetically coupled with a primary winding of a transformer of the converter. The primary winding to a secondary winding of the transformer leakage inductance energy is recovered by storing the energy in the second capacitor. When the second capacitor is discharging, the energy in the second capacitor may be further transferred to the first capacitor. When the first capacitor is discharging, energy in the first capacitor may be further returned to the power source. Therefore, the energy in the first capacitor and the energy in the second capacitor may not be consumed by a resistor, and power consumption of the low loss snubber may be decreased.

說明書

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
= - N Wp N Ws × V out .

With reference to FIG. 9, when the switch 12 is turned on, the voltage of the first node n1 may be pulled down to the ground, such as 0V, and the power source may provide the primary current Ip flowing through the primary winding Wp and the switch 12 and to the ground.

Further, the voltage of the second node n2 may be ?Vc1, and the voltage of the third node n3 may not be changed. When the flyback converter is operated under a critical conduction mode or a discontinuous conduction mode, the voltage across the first capacitor C1 Vc1 is calculated by

V c ? ? 1 = - N Wp N W ? ? s × V out .

權(quán)利要求

1
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