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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

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The secondary winding Ws is magnetically coupled with the primary winding Wp, and the secondary winding Ws is electrically connected between an anode of the output diode Dout and the second output terminal O/P2. The cathode of the output diode Dout is electrically connected to the first output terminal O/P1. The output capacitor Cout is electrically connected between the first output terminal O/P1 and the second output terminal O/P2.

The input terminal I/P is further electrically connected to a power source 23 to receive electric power from the power source 23. The first output terminal O/P1 and the second output terminal O/P2 are further electrically connected to a load 24 to transmit electric power to the load 24.

When the switch 21 is turned off, a primary current Ip flowing through the primary winding Wp and magnetic flux produced by the primary current Ip drop. A voltage induced in the secondary winging Ws is forward-biasing the output diode Dout, allowing an output current Iout to flow from the secondary winding Ws of the transformer. The energy from the transformer recharges the output capacitor Cout and supplies the load 24.

The transformer winding magnetizing current will try to maintain current flow when the switch 21 is open, causing the voltage on switch 21 to rise to

V out × N Wp N Ws + V i ?

權(quán)利要求

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