Passive electronic fuse for protecting a DC application
View Patent ↗A passive electronic fuse for protecting a DC application in the event of a fault includes a first leg including a first winding of a mutual inductor and a switch device connected in series, a second leg including a second winding of the mutual inductor. The first leg and the second leg are connected in parallel and a self-inductance of the second winding is lower than a self-inductance of the first winding. The second leg further includes a capacitor connected in series with the second winding of the mutual inductor, and the switch device is a thyristor or a switch device with switching properties of a thyristor.
1. A passive electronic fuse for protecting a DC application in the event of a fault, the electronic fuse comprising:
a first leg comprising a first winding of a mutual inductor and a switch device connected in series; and
a second leg comprising a second winding of the mutual inductor,
wherein the first leg and the second leg are connected in parallel and a self-inductance of the second winding is lower than a self-inductance of the first winding,
wherein the second leg further comprises a capacitor connected in series with the second winding of the mutual inductor, and
wherein the switch device is a thyristor or a switch device with switching properties of a thyristor.
2. The passive electronic fuse according to claim 1 , wherein the self-inductance of the second winding constitutes less than 30% of the self-inductance of the first winding.
3. The passive electronic fuse according to claim 1 , wherein the electronic fuse comprises means for triggering a gate of the thyristor, and the thyristor is a gate turn- on thyristor, wherein the means for triggering the gate of the thyristor is adapted to emit a pulse to the gate for triggering conduction of the thyristor.
4. The passive electronic fuse according to claim 1 , wherein the electronic fuse comprises means for triggering a gate of the thyristor, and the thyristor is at least one of a gate turn- off thyristor and a gate-commutated thyristor wherein the means for triggering the gate of the thyristor is adapted to emit a pulse to the gate for turning off conduction of the thyristor.
5. The passive electronic fuse according to claim 1 , wherein the electronic fuse further comprises a third leg comprising an overvoltage protection circuit.
6. The passive electronic fuse according to claim 5 , wherein the third leg is connected in parallel to the first leg and the second leg.
7. The passive electronic fuse according to claim 5 , wherein the overvoltage protection circuit comprises a first snubber.
8. The passive electronic fuse according to claim 1 , wherein a second snubber is connected in parallel to the first winding of the mutual inductor.
9. The passive electronic fuse according to claim 1 , wherein the electronic fuse further comprises a third snubber connected in parallel to the first winding of the thyristor.
10. The passive electronic fuse according to claim 1 , wherein the electronic fuse further comprises a fourth snubber connected in parallel to the capacitor.
11. The passive electronic fuse according to claim 7 , wherein at least one of the first snubber, the second snubber, the third snubber and the fourth snubber is a varistor, a resistor capacitor snubber, a resistor capacitor diod snubber, a resistor diode snubber, or a capacitor.
12. The passive electronic fuse according to claim 1 , wherein the capacitor of the second leg is an electrolytic capacitor.
13. The passive electronic fuse according to claim 1 , wherein the mutual inductor comprises an air core or a core of a magnetic material or a non-magnetic material.
14. An electrical power system for a hybrid or pure electric vehicle, comprising:
a power delivery unit;
a discharge circuit; and
the passive electronic fuse according to claim 1 .
15. An electric energy storage system for storing electrical energy, comprising:
series, and optionally parallel, connected electro-chemical battery cells;
a power conversion device; and
one or more of the passive electronic fuses according to claim 1 .
16. The passive electronic fuse according to claim 1 , wherein the self-inductance of the second winding constitutes less than 15% of the self-inductance of the first winding.
17. The passive electronic fuse according to claim 2 , wherein the electronic fuse comprises means for triggering a gate of the thyristor, and the thyristor is a gate turn- on thyristor, wherein the means for triggering the gate of the thyristor is adapted to emit a pulse to the gate for triggering conduction of the thyristor.
18. The passive electronic fuse according to claim 2 , wherein the electronic fuse comprises means for triggering a gate of the thyristor, and the thyristor is at least one of a gate turn- off thyristor and a gate-commutated thyristor wherein the means for triggering the gate of the thyristor is adapted to emit a pulse to the gate for turning off conduction of the thyristor.
19. The passive electronic fuse according to claim 3 , wherein the electronic fuse comprises means for triggering a gate of the thyristor, and the thyristor is at least one of a gate turn- off thyristor and a gate-commutated thyristor wherein the means for triggering the gate of the thyristor is adapted to emit a pulse to the gate for turning off conduction of the thyristor.
20. The passive electronic fuse according to claim 2 , wherein the electronic fuse further comprises a third leg comprising an overvoltage protection circuit.