Patent ID: 8988915
Filing Date: 2015-03-24
Classification: H02M

Abstract:
1. A DC to AC converter, comprising: a first switch comprising a first terminal and a second terminal; a second switch comprising a first terminal and a second terminal, wherein a portion between the first terminal of the first switch and the first terminal of the second switch is operable to receive a direct current power source; a first half bridge inverter comprising a first terminal, a second terminal, and an output terminal, wherein the first terminal of the first half bridge inverter is electrically connected to the second terminal of the first switch, and the second terminal of the first half bridge inverter is electrically connected to the second terminal of the second switch, wherein the first half bridge inverter comprises a third switch comprising a first terminal and a second terminal, wherein the first terminal of the third switch is the first terminal of the first half bridge inverter; and a second half bridge inverter comprising a first terminal, a second terminal, and an output terminal, wherein the first terminal of the second half bridge inverter is electrically connected to the second terminal of the first switch, and the second terminal of the second half bridge inverter is electrically connected to the second terminal of the second switch, wherein a portion between the output terminal of the first half bridge inverter and the output terminal of the second half bridge inverter is operable to output an alternative current power source; wherein the first switch is operable to receive a first switch signal, the second switch is operable to receive a second switch signal, and the third switch is operable to receive a third switch signal, wherein the first switch signal, the second switch signal, and the third switch signal are generated by comparing a first reference voltage with a triangle wave, and when the first reference voltage is at a positive half period, the first switch, the second switch, and the third switch are controlled by the first switch signal, the second switch signal, and the third switch signal respectively, and thereby the first switch, the second switch, and the third switch are turned on or turned off simultaneously.