US 2011/0211379 A1 · POWER CONVERTER WITH REVERSE RECOVERY AVOIDANCE

Abstract

A power converter includes a reverse-recovery avoidance scheme. The power converter may include deliver current from a direct current (DC) power source to an alternating current (AC) load. A first switch and second switch of the power converter may be operated to supply the AC load with positive current respective to the AC load from the DC power source. A third and fourth switch of the power converter may be operated to supply the AC load with negative current respective to the AC load from the DC power source. A first diode may be electrically coupled in series with the second switch and second diode may be electrically coupled in parallel with the first diode and the second switch. The second diode may conduct the positive current when the first switch is off and the second switch is on. A third diode may be electrically coupled in series with the fourth switch and a fourth diode may be electrically coupled in parallel with the third diode and the fourth switch. The fourth diode may conduct the negative current when the third switch is off and the fourth switch is on.

Claims20

Dependent claims

A power converter configured to transfer power between a direct current (DC) voltage source and an alternating current (AC) load, the power converter comprising:

a plurality of switches electrically configured to be electrically coupled between the voltage source and the load;
a first diode electrically coupled between the load and a first switch of the plurality of switches;
a second diode electrically coupled between the load and a second switch of the plurality of switches;
a third diode electrically coupled in parallel to the first diode and the first switch;
and
a fourth diode electrically coupled in parallel to the second diode and the second switch.

3 more elements

A power delivery system comprising:

a plurality of switches configured to supply power from a direct current (DC) power source to an alternating current (AC) load, wherein the plurality of switches comprises:
a first switch and a second switch each configured to direct a current from the DC power source to the AC load, wherein the current is positive in polarity with respect to the AC load, and wherein the first switch is configured to be switched at a first frequency and the second switch is configured to be switched at a second frequency different than the first frequency;
and
a third switch and a fourth switch each configured to direct the current from the DC power source to the AC load, wherein the current is negative in polarity with respect to the AC load, and wherein the third switch is configured to be switched at the first frequency and the fourth switch is configured to be switched at the second frequency;
a first diode and second diode, wherein the first diode is electrically coupled in series with the second switch and the second diode is electrically coupled in series with the fourth switch;
and
a third diode and a fourth diode, wherein the third diode is electrically coupled in parallel with the first diode and the second switch and the fourth diode is electrically coupled in parallel with the second diode and the fourth switch.

4 more elements

Dependencies are inferred from the claim text.

Power converter with reverse recovery avoidance

Life of this patent

Power converter with reverse recovery avoidance

Life of this patent

Abstract

Claims20