Multimodal vibration harvester combining inductive and magnetostrictive mechanisms
First Claim
1. A multimodal energy harvester comprising:
- (a) an inductive mode comprising;
a cylindrical tube with opposing ends,a rod disposed lengthwise within the tube,a first permanent magnet with a first polarity disposed at one end of the cylindrical tube and an second permanent magnet with a second polarity opposite the first polarity disposed at the opposing end of the cylindrical tube,a central, annular oscillatory magnet disposed within the tube, between the first and second permanent magnets, and around the rod; and
a primary coil disposed around an exterior of the cylindrical tube and surrounding a portion of the central magnet, such that during use relative movement between the oscillatory magnet and the primary coil induces an electrical current in the primary coil; and
(b) a magnetostrictive mode comprising;
at least one piezoelectric cymbal transducer disposed on one end of the cylindrical tube and comprising a magnetostrictive material surrounded by a secondary coil, such that during use movement of the magnetostrictive material induces voltage in the secondary coil.
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Accused Products
Abstract
Multi-Mechanism Energy Harvesters (MMEHs) combining magnetostrictive and inductive mechanisms with a shape and size similar to an AA battery. Included are MMEHs with (a) an inductive mode: a cylindrical tube, a rod lengthwise within the tube, permanent magnets with opposing polarities at opposing ends of the tube, an annular oscillatory magnet in the tube and between the magnets and around the rod; and a primary coil around the tube and oscillatory magnet, such that relative movement between the magnet and coil induces electrical current in the coil; and (b) a magnetostrictive mode comprising: piezoelectric cymbal transducers on opposing ends of the tube and comprising a magnetostrictive material surrounded by a secondary coil, such that movement of the magnetostrictive material induces voltage in the secondary coil. During use, electrical energy can be harvested from the relative motion between the magnet and coil and from the magnetostrictive material.
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Citations
11 Claims
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1. A multimodal energy harvester comprising:
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(a) an inductive mode comprising; a cylindrical tube with opposing ends, a rod disposed lengthwise within the tube, a first permanent magnet with a first polarity disposed at one end of the cylindrical tube and an second permanent magnet with a second polarity opposite the first polarity disposed at the opposing end of the cylindrical tube, a central, annular oscillatory magnet disposed within the tube, between the first and second permanent magnets, and around the rod; and a primary coil disposed around an exterior of the cylindrical tube and surrounding a portion of the central magnet, such that during use relative movement between the oscillatory magnet and the primary coil induces an electrical current in the primary coil; and (b) a magnetostrictive mode comprising; at least one piezoelectric cymbal transducer disposed on one end of the cylindrical tube and comprising a magnetostrictive material surrounded by a secondary coil, such that during use movement of the magnetostrictive material induces voltage in the secondary coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification