Magnetic element for power supply and dc-to-dc converter
First Claim
Patent Images
1. A magnetic element for use in a power supply comprising:
- a planar inductor comprising a planar coil, insulating layers disposed on the both surfaces of the planar coil and soft magnetic layers disposed on the outer surfaces of the insulating layers; and
a search coil for detecting an overcurrent flowing said planar coil, disposed on at least one of the outer surfaces of said soft magnetic layers.
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Abstract
Disclosed is a dc-to-dc converter comprising a switching transistor, a pulse-width modulation controller, a sandwich-type planar inductor, which accumulates an electromagnetic energy at ON state and releases the accumulated electromagnetic energy at OFF state of the switching transistor, a smoothing capacitor, a rectifying element, and a planar search coil for detecting an overcurrent flowing the planar coil, disposed on one of the outer surfaces of the soft magnetic layers constituting the planar inductor.
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Citations
20 Claims
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1. A magnetic element for use in a power supply comprising:
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a planar inductor comprising a planar coil, insulating layers disposed on the both surfaces of the planar coil and soft magnetic layers disposed on the outer surfaces of the insulating layers; and a search coil for detecting an overcurrent flowing said planar coil, disposed on at least one of the outer surfaces of said soft magnetic layers. - View Dependent Claims (2)
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3. A magnetic element for use in a power supply comprising:
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a planar inductor comprising a planar coil, insulating layers disposed on the both surfaces of the planar coil and soft magnetic layers disposed on the outer surfaces of the insulating layers; and auxiliary planar coils disposed on the outer surfaces of said soft magnetic layers.
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4. A magnetic element for use in a power supply comprising:
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a planar transformer comprising a planar primary coil and a planar secondary coil disposed through an insulating layer, insulating layers disposed on the surfaces of the primary and secondary coils and soft magnetic layers disposed on the outer surfaces of the insulating layers; and a search coil for detecting an overcurrent flowing said planar coil, disposed on at least one of the outer surfaces of said soft magnetic layers. - View Dependent Claims (5)
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6. A dc-to-dc converter comprising:
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a switching means for generating a rectangular wave from an input signal; a means for modulating a pulse width of the rectangular wave generated by the switching means; a planar inductor comprising a planar coil, insulating layers disposed on the both surfaces of the planar coil and soft magnetic layers disposed on the outer surfaces of the insulating layers, which accumulates an electromagnetic energy at ON state and releases the accumulated electromagnetic energy at OFF state of the switching means; a capacitor for smoothing the wave generated by the switching means; a rectifying element; and a search coil for detecting an overcurrent flowing said planar coil, disposed on at least one of the outer surfaces of said soft magnetic layers constituting said planar inductor. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A dc-to-dc converter comprising:
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a switching means for generating a rectangular wave from an input signal; a means for modulating a pulse width of the rectangular wave generated by the switching means; a planar transformer comprising a planar primary coil and a planar secondary coil disposed through an insulating layer, insulating layers disposed on the surfaces of the primary and secondary coils and soft magnetic layers disposed on the outer surfaces of the insulating layers, which accumulates an electromagnetic energy in the planar primary coil at ON state and releases the accumulated electromagnetic energy via the planar secondary coil at OFF state of the switching means; a capacitor for smoothing the wave generated by the switching means; a rectifying element; and a search coil for detecting an overcurrent flowing said planar coil, disposed on at least one of the surfaces of said soft magnetic layers constituting said planar transformer. - View Dependent Claims (18, 19)
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20. A magnetic element for use in a power supply comprising:
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a planar inductor comprising a planar coil, insulating layers disposed on both surfaces of the planar coil, and soft magnetic layers disposed on surfaces of the insulating layers; a search coil for detecting an overcurrent flowing through said planar coil, disposed on at least one of outer surfaces of said soft magnetic layers; and a means for controlling a load current supplied to said planar inductor based on an overcurrent signal fed back from said search coil.
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Specification