Four segment AC MOSFET switch
AssigneeSchneider Electric It Corporation
InventorAlain Lacarnoy
Life of this patent
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Abstract
At least one aspect of the disclosure is directed to an AC switching system. The AC switching system includes a first I/O, a second I/O, a first segment including a first plurality of switches, the first segment being coupled to the first I/O, a second segment including a second plurality of switches, the second segment being coupled with the first segment and coupled to the second I/O, a third segment including a diode, the third segment being coupled to the first I/O and coupled to a junction of the first segment and the second segment, and a fourth segment including a diode, the fourth segment being coupled to the second I/O and coupled to the junction of the first segment and the second segment.
Claims21
An AC switching system comprising:
- a first I/O;
- a second I/O;
- a first segment including a first plurality of switches, the first segment having a first end and a second end with the first end being coupled to the first I/O;
- a second segment including a second plurality of switches, the second segment having a first end and a second end with the first end of the second segment being coupled to the second end of the first segment and the second end of the second segment being coupled to the second I/O;
- a third segment including a diode, the diode of the third segment being coupled to the first I/O and directly coupled to the second end of the first segment and the first end of the second segment;
- and
- a fourth segment including a diode, the fourth segment being coupled to the second I/O and coupled to the second end of the first segment and the first end of the second segment.
A method of operating an AC switching system having a first I/O, a second I/O, a first segment including a first plurality of switches, a second segment including a second plurality of switches, a third segment including a diode, and a fourth segment including a diode, the method comprising:
- closing a first switching device of the system in the first segment, wherein the first switching device provides a path for a first current through a first diode and a second diode to the second I/O during a first period of time;
- closing a second switching device of the system in the third segment during a second period of time, the second period of time being greater than the first period of time, wherein the second switching device couples the first I/O to a junction of the first diode and the second diode to provide a second current from the first I/O to the second I/O;
- and
- closing a third switching device of the system in the second segment during a third period of time, wherein the third switching device is coupled to the first diode and provides a path for the second current through a third diode, wherein the third diode is coupled to the second I/O, and wherein a majority of the second current during the second period of time and the third period of time is conducted through the second switching device, and only a portion of the first current is conducted by the third diode during the third period of time.
An AC switching system comprising:
- a first I/O;
- a second I/O;
- a first segment including a first plurality of switches, the first segment having a first end and a second end with the first end being coupled to the first I/O;
- a second segment including a first switch and a second switch, the second segment having a first end and a second end with the first end of the second segment being coupled to the second end of the first segment and the second end of the second segment being coupled to the second I/O;
- a third segment including a diode, the third segment being coupled to the first I/O and coupled to a second end of the first switch and a first end of the second switch;
- and
- a fourth segment including a diode, the fourth segment being coupled to the second I/O and coupled to a junction of two switches of the first plurality of switches.
Dependencies are inferred from the claim text.