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US 5,705,861 AGranted
Magnetic field pulse generator
AssigneeSiemens Matsushita Components GmbH & Co. KG
InventorMauricio Esguerra
Life of this patent
Estimating the term…
Abstract
A magnetic field pulse generators has an electrical coil and a magnetizable element being inductively coupled thereto, for together radiating a magnetic field into an external space. In order to switch off the magnetic field in the external space, the magnetizable element can be driven to saturation by a pulsed current in the coil at which the material of the coil core has not yet reached saturation.
Claims5
A magnetic field pulse generator, comprising:
- an electrical coil having a core formed of a material;
- a magnetizable element inductively coupled to said electrical coil, said magnetizable element formed of a ferromagnetic material reaching saturation at a magnetic induction small in relation to an induction necessary to saturate said material of said core;
- said magnetizable element and said electrical coil together radiating a magnetic field into an external space, the magnetic field in the external space being switched on and off by electrically switching over said magnetizable element from an unsaturated to a saturated state;
- and
- pulse voltage source coupled to said coil for super-imposing a pulsed current on a current generating the magnetic field, the pulsed current being sufficient to generate a magnetic induction at which said magnetizable element reaches saturation.
2 more elements
A magnetic field pulse generator for an inductive proximity switch, comprising:
- an electrical coil having a core formed of a material;
- a magnetizable element inductively coupled to said electrical coil, said magnetizable element formed of a ferromagnetic material reaching saturation at a magnetic induction small in relation to an induction necessary to saturate said material of said core;
- said magnetizable element and said electrical coil together radiating a magnetic field into an external space, the magnetic field in the external space being switched on and off by electrically switching over said magnetizable element from an unsaturated to a saturated state;
- and
- a pulse voltage source coupled to said coil for super-imposing a pulsed current on a current generating the magnetic field, the pulsed current being sufficient to generate a magnetic induction at which said magnetizable element reaches saturation.
2 more elements
Dependencies are inferred from the claim text.