| 摘要 |
A passive coupled-inductor soft-switching circuit of a power factor corrector is provided. The passive coupled-inductor soft-switching circuit includes a power input terminal, a first inductor, a first diode, a power output terminal, a power switch and a buffer circuit. The first inductor has a first terminal and a second terminal, wherein the first terminal of the first inductor is electrically coupled with the power input terminal. The first diode has a positive terminal and a negative terminal, wherein the positive terminal of the first diode is electrically coupled with the second terminal of the first inductor. The power output terminal is electrically coupled with the negative terminal of the first diode. The buffer circuit is electrically coupled with the power switch. By using the buffer circuit, the voltage and current have phase interlacing shifts and thereby reducing the switching loss. |
| 主权项 |
1. A passive coupled-inductor soft-switching circuit of a power factor corrector, comprising:
a power input terminal; a first inductor having a first terminal and a second terminal, wherein the first terminal of the first inductor is electrically coupled with the power input terminal; a first diode having a positive terminal and a negative terminal, wherein the positive terminal of the first diode is electrically coupled with the second terminal of the first inductor; a power output terminal electrically coupled with the negative terminal of the first diode; a power switch; and a buffer circuit electrically coupled with the power switch, the buffer circuit comprising:
a coupled inductor comprising a first winding set and a second winding set, both of the first winding set and the second winding set having a first terminal and a second terminal, wherein the first terminal of the first winding set is electrically coupled between the first inductor and the first diode, and the second terminal of the first winding set is electrically coupled with the power switch;a first capacitor having a first terminal and a second terminal, wherein the first terminal of the first capacitor is electrically coupled with the first terminal of the first winding set;a second diode having a positive terminal and a negative terminal, wherein the positive terminal of the second diode is electrically coupled with the second terminal of the first capacitor, and the negative terminal of the second diode is electrically coupled between the first diode and the power output terminal;a third diode having a positive terminal and a negative terminal, wherein the positive terminal of the third diode is electrically coupled between the first winding set and the power switch;a second capacitor having a first terminal and a second terminal, wherein the first terminal of the second capacitor is electrically coupled with the negative terminal of the third diode, and the second terminal of the second capacitor is electrically coupled with the negative terminal of the second diode; anda fourth diode having a positive terminal and a negative terminal, wherein the positive terminal of the fourth diode is electrically coupled with the first terminal of the second winding set in series, and the negative terminal of the fourth diode is electrically coupled between the first capacitor and the second diode, wherein the second terminal of the second winding set is electrically coupled between the second capacitor and the third diode. |
