US5583424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic element for power supply and dc-to-dc converter
Assignee: Toshiba Corp
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Filing: 1994-03-15
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Granted: 1996-12-10
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Expires: 2014-03-15
Abstract
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.
Inventors
- 👤 Toshiro Sato
- 👤 Kunio Matsukura
- 👤 Isamu Yanase
- 👤 Yuji Iseki
- 👤 Tetsuhiko Mizoguchi
- 👤 Yuji Ide
- 👤 Michio Hasegawa
- 👤 Yoshihiko Yamaguchi
- 👤 Yasunori Iwamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:46
CPC Classifications
H; H01; H01F; H01F17/00; H01F17/0006; G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56; G05F1/575; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H01F2017/0066; H01F2017/0086; H02M1/00; H02M1/0003; H02M1/0009
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
67 words
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.
Claim 2
Dependent Claim
67 words
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.
Claim 3
Dependent Claim
34 words
The magnetic element according to claim 1, wherein said search coil is a planar search coil stacked on at least one of the outer surfaces of said soft magnetic layers through on insulating layer.
Claim 4
Dependent Claim
55 words
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 auxiliary planar coils disposed on the outer surfaces of said soft magnetic layers.
Claim 5
Dependent Claim
55 words
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 auxiliary planar coils disposed on the outer surfaces of said soft magnetic layers.
Claim 6
Dependent Claim
79 words
A magnetic element for use in a power supply comprising: 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.
Claim 7
Dependent Claim
79 words
A magnetic element for use in a power supply comprising: 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.
Claim 8
Dependent Claim
34 words
The magnetic element according to claim 4, wherein said search coil is a planar search coil stacked on at least one of the outer surfaces of said soft magnetic layers through an insulating layer.
Claim 9
Dependent Claim
128 words
A dc-to-dc converter comprising: 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.
Claim 10
Dependent Claim
128 words
A dc-to-dc converter comprising: 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.
Claim 11
Dependent Claim
38 words
The dc-to-dc converter according to claim 6, wherein said search coil is a planar search coil stacked on at least one of the outer surfaces of said soft magnetic layers constituting said planer inductor through an insulating layer.
Claim 12
Dependent Claim
22 words
The dc-to-dc converter according to claim 6, wherein said rectifying element serves as regenerating the electromagnetic energy accumulated in the planar inductor.
Claim 13
Dependent Claim
31 words
The dc-to-dc converter according to claim 6, wherein the switching means, the planar inductor, and the capacitor are arranged such that they generate an output voltage lower than an input voltage.
Claim 14
Dependent Claim
31 words
The dc-to-dc converter according to claim 6, wherein the switching means, the planar inductor, and the capacitor are arranged such that they generate an output voltage higher than an input voltage.
Claim 15
Dependent Claim
54 words
The dc-to-dc converter according to claim 6, further comprising a highly heat-conductive insulating substrate having a recessed portion, wherein the planar inductor, the search coil and the capacitor are buried in the recessed portion, and the switching means, means for modulating the pulse width and the rectifying element are mounted on the insulating substrate.
Claim 16
Dependent Claim
34 words
The dc-to-dc converter according to claim 6, wherein said switching means is fabricated on a semiconductor substrate, and said search coil and said planar inductor are formed on the semiconductor substrate with being insulated.
Claim 17
Dependent Claim
16 words
The dc-to-dc converter according to claim 6, wherein said rectifying element is a p-n junction diode.
Claim 18
Dependent Claim
15 words
The dc-to-dc converter according to claim 6, wherein said rectifying element is an MOSFET diode.
Claim 19
Dependent Claim
31 words
The dc-to-dc converter according to claim 14, further comprising a Schottky diode having an ON voltage lower than the ON voltage of a parasitic p-n junction diode of said MOSFET diode.
Claim 20
Dependent Claim
15 words
The dc-to-dc converter according to claim 6, wherein said capacitor is a multilayered ceramic capacitor.
Claim 21
Dependent Claim
149 words
A dc-to-dc converter comprising: 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.
Claim 22
Dependent Claim
149 words
A dc-to-dc converter comprising: 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.
Claim 23
Dependent Claim
38 words
The dc-to-dc converter according to claim 17, wherein said search coil is a planar search coil stacked on at least one of the outer surfaces of said soft magnetic layers constituting said planar transformer through an insulating layer.
Claim 24
Dependent Claim
22 words
The dc-to-dc converter according to claim 17, wherein said rectifying element serves as regenerating the electromagnetic energy accumulated in the planar transformer.
Claim 25
Dependent Claim
87 words
A magnetic element for use in a power supply comprising: 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.
Claim 26
Dependent Claim
87 words
A magnetic element for use in a power supply comprising: 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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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-12-10 | 2000-06-10 | 2000-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-12-10 | 2004-06-10 | 2004-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-12-10 | 2008-06-10 | 2008-12-10 | $7700.00 | Window Closed / Lapsed |