Inductors for direct current (DC) circuit breakers in aircraft applications
AssigneeHamilton Sundstrand Corporation
InventorsParikshith Channegowda, Bo Liu, Xin Wu
Life of this patent
Estimating the term…
Abstract
A solid-state circuit breaker (SSCB) is provided. The SSCB includes an electrical circuit. The electrical circuit includes inductor electrical connections, a diode rectifier bridge that drives current, which enters the electrical circuit in first or second directions, across the inductor electrical connections in only one of the first direction or the second direction and an inductor. The inductor is electrically interposed between the inductor electrical connections. The inductor includes a permanent magnet arrangement configured to introduce flux pre-bias for maintaining the inductor in an out-of-saturation condition during a peak fault event.
Claims19
A solid-state circuit breaker (SSCB), comprising:
- an electrical circuit comprising:
- a number of inductor electrical connections;
- a diode rectifier bridge that drives current, which enters the electrical circuit in first or second directions, across the inductor electrical connections in only one of the first direction or the second direction;
- and
- an inductor electrically interposed between the inductor electrical connections,
- the inductor comprising a permanent magnet arrangement configured to introduce flux pre-bias for maintaining the inductor in an out-of-saturation condition during a peak fault event,
- wherein:
- the inductor comprises a bobbin comprising base elements at opposite longitudinal ends thereof, a magnetic core disposed about the bobbin and a permanent magnet pair disposed in series or in parallel with magnetic flux in the inductor, and
- the magnetic core comprises first portions at the opposite longitudinal ends and second and third portions extending between the first portions at first and second sides of the bobbin, respectively.
A bobbin of an inductor of a solid-state circuit breaker (SSCB), the bobbin comprising:
- base elements;
- and
- bobbin channels interposed between the base elements to extend along a longitudinal axis defined to extend between the base elements,
- each of the bobbin channels being receptive of a corresponding portion of a winding with an absence of insulation,
- wherein the bobbin comprises a magnetic core and a north-south permanent magnet pair disposed in series or in parallel with magnetic flux in the inductor, the base elements are at opposite longitudinal ends of the bobbin and the magnetic core comprises:
- first portions at the opposite longitudinal ends of the bobbin;
- second portions extending between first corresponding ends of the first portions at a first side of the bobbin;
- and
- third portions extending between second corresponding ends of the first portions at a second side of the bobbin.
A solid-state circuit breaker (SSCB), comprising:
- an electrical circuit comprising:
- a number of inductor electrical connections;
- a diode rectifier bridge that drives current, which enters the electrical circuit in first or second directions, across the inductor electrical connections in only one of the first direction or the second direction;
- and
- a coreless inductor electrically interposed between the inductor electrical connections and is configured to introduce flux pre-bias for maintaining the coreless inductor in an out-of-saturation condition during a peak fault event,
- the coreless inductor comprising:
- a winding;
- a ferromagnetic fluid circuit configured to flow a ferromagnetic fluid through the winding;
- and
- a heat exchanger configured to remove heat from the ferromagnetic fluid.
Dependencies are inferred from the claim text.