Direct current solid-state airgap with parallel multi-throw switch
AssigneeSiemens Industry, Inc.
InventorGuang Yang
Life of this patent
Estimating the term…
Abstract
A direct current (DC) switch circuit includes an isolation switch, and an interruption circuit connected in series with the isolation switch. The interruption circuit includes a parallel connection of a current conducting branch, a bypass power electronics branch, a gate driving branch, and an energy absorbing branch. The current conducting branch includes a multi-throw switch configured to operate in a first position to establish a first electrical connection between the current conducting branch and a load and a second position to establish as second electrical connection that turns off the bypass power electronics branch.
Claims12
A unidirectional direct current (DC) switch circuit comprising:
- an isolation switch;
- and
- an interruption circuit connected in series with the isolation switch, the interruption circuit including a parallel connection of a current conducting branch, a bypass power electronics branch, a gate driving branch, and an energy absorbing branch,
- wherein the current conducting branch includes a multi-throw switch configured to operate in a first position to establish a first electrical connection between the current conducting branch and a load and a second position to establish a second electrical connection that turns off the bypass power electronics branch,
- wherein:
- the bypass power electronics branch includes a power electronics component connected in series with a voltage setting component;
- and
- the gate driving branch includes a series connection of a resistor, a diode, and a Zener diode.
A bidirectional direct current (DC) switch circuit comprising:
- a main current path configured to deliver a load current to a load, the main current path including a voltage source segment and a load segment,
- an isolation switch configured to selectively open or close an airgap between a voltage source and the voltage source segment,
- a forward current interruption sub-circuit including a forward current input connected in common with the isolation switch and the voltage source segment,
- a reverse current interruption sub-circuit including a reverse current input connected to the load segment, and
- a multi-break switch configured to operate in a first position that connects together the voltage source segment and the load segment to establish the main current path, and a second position to establish a connection that turns off one or both of the forward current interruption sub-circuit and the reverse current interruption sub-circuit, and
- further comprising an energy absorbing device including a first terminal connected in common with the isolation switch, the voltage source segment and the forward current interruption sub-circuit, and a second terminal connected in common with the reverse current interruption sub-circuit and the load segment, wherein:
- the forward current interruption sub-circuit includes a forward bypass power electronics branch and a forward gate driving branch connected in parallel with the forward bypass power electronics branch, and
- the reverse current interruption sub-circuit includes a reverse bypass power electronics branch and a reverse gate driving branch connected in parallel with the reverse bypass power electronics branch,
- the forward bypass power electronics branch includes a first power electronics component connected in series with a first voltage setting component, and
- the reverse bypass power electronics branch includes a second power electronics component connected in series with a second voltage setting component.
Dependencies are inferred from the claim text.