US 10,097,081 B1Granted

Converter having low loss snubber

AssigneeAcbel Polytech Inc.

InventorsJames D. Bucher, II, Alan D. Lauer, Emma C. Trzynka, Jason C. Dehn

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Abstract

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.

Claims9

Dependent claims

A converter having a low loss snubber, comprising:

an input terminal;
a transformer, comprising a primary winding and a secondary winding;
a switch;
wherein the switch and the primary winding are electrically connected in series, and are electrically connected between the input terminal and a ground;
the low loss snubber, comprising:
a first diode;
wherein a cathode of the first diode is electrically connected to the input terminal;
a first capacitor;
wherein the first capacitor is electrically connected between an anode of the first diode and a first node connected by the primary winding and the switch;
a second diode;
a third diode;
wherein a cathode of the third diode is electrically connected to the anode of the first diode;
a second capacitor;
wherein the second capacitor is electrically connected between a cathode of the second diode and the ground;
a first inductor, electrically connected between an anode of the third diode and the cathode of the second diode;
a clamping winding;
wherein the clamping winding is magnetically coupled with the primary winding, and the clamping winding is electrically connected between the ground and an anode of the second diode;
a first output terminal;
a second output terminal;
wherein the secondary winding is magnetically coupled with the primary winding and the clamping winding, and is electrically connected between the first output terminal and the second output terminal.

17 more elements

Dependencies are inferred from the claim text.