Solid state switch system
AssigneeABB Schweiz AG
InventorsPietro Cairoli, Lukas Hofstetter, Matthias Bator, Riccardo Bini, Munaf Rahimo
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Abstract
A solid state switch has at least one FET-type device and at least one thyristor-type device coupled in parallel to the at least one FET-type device. The at least one FET-type device is constructed with a first power loss profile based on a rated current of an electrical device; and the at least one thyristor-type device is constructed with a second power loss profile based on a surge current associated with the electrical device.
Claims20
A solid state contactor system for connecting and disconnecting an electrical machine to/from a power source, the electrical machine having a rated current, comprising:
- a first terminal constructed for coupling to and receiving power from a power source;
- a second terminal constructed for providing power from the power source to the electrical machine;
- at least one FET-type device coupled to the first terminal and the second terminal;
- and
- at least one thyristor-type device coupled to the first terminal and the second terminal in parallel to the at least one FET-type device,
- wherein the at least one FET-type device is constructed with a first power loss profile based on the rated current;
- and
- wherein the at least one thyristor-type device is constructed with a second power loss profile based on an inrush current and a start current associated with the electrical machine.
A solid state switch system constructed to connect and disconnect an electrical device to/from a power source, comprising:
- a first terminal constructed for coupling to a power source;
- a second terminal constructed for providing power received from the power source to the electrical device;
- at least one FET-type device coupled to the first terminal and the second terminal;
- and
- at least one thyristor-type device coupled to the first terminal and the second terminal in parallel to the at least one FET-type device,
- wherein the at least one FET-type device is selected and constructed to provide a first current flow to the electrical device up to a threshold current;
- and wherein the at least one thyristor-type device is selected and constructed to provide a second current flow to the electrical device in excess of the threshold current;
- and
- wherein the at least one FET-type device is constructed with a first power loss profile;
- wherein the at least one thyristor-type device is constructed with a second power loss profile, and wherein the threshold current is based on a correlation between the first power loss profile and the second power loss profile.
A solid state switch system constructed to connect and disconnect an electrical device to/from a power source, the electrical device having a rated current, comprising:
- a first terminal constructed for coupling to a power source;
- a second terminal constructed for providing power received from the power source to the electrical device;
- first means for controlling current flow;
- and
- second means for controlling current flow disposed in parallel to the first means for controlling current flow,
- wherein the first means for controlling current flow is constructed with a first power loss profile based on the rated current;
- and
- wherein the second means for controlling current flow is constructed with a second power loss profile based on a surge current associated with the electrical device.
Dependencies are inferred from the claim text.