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US 12,518,898 B2Granted
Current controlling element based on saturation of a magnetic circuit
AssigneeEaton Intelligent Power Limited
InventorPetr Kopejtko
Life of this patent
Estimating the term…
Abstract
A current controlling element includes: a first magnetic core forming a magnetic circuit; a coil for generating a magnetic flux in the first magnetic core when energized; a second magnetic core arranged at a distance from the first magnetic core; and a magnetoresistive conductor arranged in a first air gap between the first magnetic core and the second magnetic core.
Claims17
A current controlling element, comprising:
- a first magnetic core forming a magnetic circuit;
- a coil configured to generate a magnetic flux in the first magnetic core when energized;
- two control terminals with the coil switched in-between the two control terminals;
- a second magnetic core arranged at a distance from the first magnetic core;
- a magnetoresistive conductor arranged in a first air gap between the first magnetic core and the second magnetic core;
- and
- two controlled current terminals with the magnetoresistive conductor switched in-between the two controlled current terminals such that a current in a second circuit comprising the magnetoresistive conductor and the two controlled current terminals is controlled by a current in a first circuit comprising the coil and the two control terminals,
- wherein during operation an additional magnetic flux above saturation of the first magnetic core is guided through the second magnetic core thereby exposing the magnetoresistive conductor to a magnetic field.
5 more elements
A current controlling element, comprising:
- a first magnetic core forming a magnetic circuit;
- a coil configured to generate a magnetic flux in the first magnetic core when energized;
- a second magnetic core arranged at a distance from the first magnetic core;
- and
- a magnetoresistive conductor arranged in a first air gap between the first magnetic core and the second magnetic core
- wherein the current controlling element is configured to have a nominal switching current Inom for a current I through the coil,
- wherein a magnetic flux density in the first magnetic core is at least ten times a magnetic flux density in the second magnetic core in a current range I<0.9·Inom, and
- wherein the magnetic flux density in the second magnetic core is at least 0.5 times the magnetic flux density in the first magnetic core in a current range I>1.1·Inom.
5 more elements
A method for controlling an output current, comprising:
- providing a first magnetic core forming a magnetic circuit, a coil configured to generate a magnetic flux in the first magnetic core when energized, two control terminals with the coil switched in-between the two control terminals, a second magnetic core arranged at a distance form the first magnetic core, and a magnetoresistive conductor;
- arranging the magnetoresistive conductor in a first air gap between the first magnetic core and the second magnetic core;
- arranging a first and second controlled current terminal on the magnetoresistive conductor with the magnetoresistive conductor switched in-between the two controlled current terminals;
- energizing the coil with an input current to generate a magnetic flux in the first magnetic core;
- and
- controlling an output current between the first and second controlled current terminals on the magnetoresistive conductor by controlling the input current to the coil,
- wherein during operations an additional magnetic flux above saturation of the first magnetic core is guided through the second magnetic core thereby exposing the magnetoresistive conductor to a magnetic field.
4 more elements
Dependencies are inferred from the claim text.