Magnetically saturable components and circuits
AssigneeL3 Cincinnati Electronics Corporation
InventorJustin Graves
Life of this patent
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Abstract
Embodiments described herein are directed to inrush current limiters having a transformer. In one embodiment, an inrush current limiter includes a transformer including a primary winding, a secondary winding and a saturable magnetic core shared therebetween, a resistor connected in parallel with the secondary winding, wherein an impedance of the resistor is reflected across the transformer when a voltage is applied across the primary winding and the saturable magnetic core is not saturated, and a diode connected between the primary winding and ground.
Claims20
An inrush current limiter, comprising:
- a transformer comprising a primary winding, a secondary winding and a saturable magnetic core shared therebetween;
- a resistor connected in parallel with the secondary winding, wherein an impedance of the resistor is reflected across the transformer when a voltage is applied across the primary winding and the saturable magnetic core is not saturated;
- and
- a diode connected between the primary winding and ground such that magnetizing current of the saturable magnetic core flows through the diode as a reset path to reset the saturable magnetic core to remanence.
A radiation hardened circuit, comprising:
- a transformer;
- a diode connected between a first end of the transformer and ground, wherein magnetizing current of the transformer flows through the diode as a reset path to reset the saturable magnetic core to remanence;
- a power source connected between the diode and ground;
- and
- a load connected between a second end of the transformer and ground,
- wherein:
- an impedance is reflected across the transformer, and
- the reflected impedance limits an inrush current.
An inrush current limiter, comprising:
- an inductor comprising a saturable magnetic core;
- a resistor connected in parallel with the inductor, wherein a current through the resistor when a voltage is applied across the inductor and the saturable magnetic core is saturated is less than a current through the resistor when the voltage is applied across the inductor and the saturable magnetic core is not saturated;
- and
- a diode connected between the inductor and ground such that magnetizing current of the saturable magnetic core flows through the diode as a reset path to reset the saturable magnetic core to remanence.
Dependencies are inferred from the claim text.