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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
技術領域
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 · V out
is a voltage at the first output terminal O/P1, NWp is a number of turns of the primary winding, NWs is a number of turns of the secondary winding, and Vin is a voltage at the input terminal I/P. Larger amplitude spikes occur due to parasitic leakage inductance between the primary winding Wp and the secondary winding Ws, where voltage is not coupled to the first output terminal O/P1. The voltage on the switch 21 will stay at

V out × N Wp N Ws + V i ? ? n
until on time volt-seconds equal off time volt-seconds.

Therefore, the snubber 22 may be provided to avoid the larger amplitude spikes. The snubber 22 may protect the converter from being damaged by the larger amplitude spikes. Besides, energy stored in the leakage inductance is transferred to the capacitor C, limiting the switch 21 voltage excursion above

V out × N Wp N Ws

權利要求

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