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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

With reference to FIG. 4, in a third embodiment of the present invention, the low loss snubber 11 further includes a first resistor R1, and the first resistor R1 is electrically connected in parallel with the first inductor L1. The parallel first resistor R1 may stabilize a circuit of the low loss snubber 11.

With reference to FIG. 5, in a fourth embodiment of the present invention, the switch 12 is a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET). A drain of the MOSFET 12 is the first node n1, and a source of the MOSFET 12 is electrically connected to the ground.

The low loss snubber 11 further includes a npn type bipolar junction transistor (BJT) Q1, a pnp type BJT Q2, a second resistor R2, a third resistor R3, and a driving circuit 15.

A collector of the npn type BJT Q1 is electrically connected to a collector power source Vcc. The collector power source Vcc is a power source to provide a collector voltage, such as 12V, to the collector of the npn type BJT Q1.

An emitter of the npn type BJT Q1 is electrically connected to an emitter of the pnp type BJT Q2, and a collector of the pnp type BJT Q2 is electrically connected to the ground. A base of the npn type BJT Q1 is electrically connected to a base of the pnp type BJT Q2. The second resistor R2 is electrically connected between the emitter of the pnp type BJT Q2 and a gate of the MOSFET 12.

權利要求

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