US3683271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power supply filter for noise suppression
Assignee: Individual
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Filing: 1970-06-23
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Granted: 1972-08-08
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Expires: 1990-06-23
Abstract
Abstract The invention provides a power supply filter for noise suppression in which the windings of a plurality of lines for supplying a power supply voltage and current of a predetermined frequency are so wound around same magnetic core that the sum of the magnetic fluxes produced by the windings may become zero, thereby providing an inductance element. This inductance is almost negligible to a power supply frequency component while it is high to a high frequency noise component, so that the power supply frequency component is not attenuated while the high frequency component superposed upon the power supply frequency component is attenuated to a greater extent. A power supply filter for noise suppression which is compact in size and having a large current may be provided.
Inventors
- 👤 Tatsuo Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:53
CPC Classifications
H; H03; H03H; H03H1/00; H03H1/0007; H03H7/00; H03H7/42; H03H7/425; H03H7/427
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
129 words
A noise suppressing power supply filter comprising a plurality of lines for supplying power supply voltage and current of a predetermined frequency component, said voltage and current including high frequency noise components, and a magnetic core having at least one magnetic path, all of said plurality of lines being wound around said one magnetic path forming an inductance element with said core, said inductance element having a pair of input terminals connected to said plurality of lines; and capacitor means connected across said input terminals for adjusting imbalances in the phases of said high frequency noise components, said inductance element having a negligible inductance to said power supply frequency component and a high inductance to said high frequency noise component which is superposed on the power supply frequency component.
Claim 2
Dependent Claim
129 words
A noise suppressing power supply filter comprising a plurality of lines for supplying power supply voltage and current of a predetermined frequency component, said voltage and current including high frequency noise components, and a magnetic core having at least one magnetic path, all of said plurality of lines being wound around said one magnetic path forming an inductance element with said core, said inductance element having a pair of input terminals connected to said plurality of lines; and capacitor means connected across said input terminals for adjusting imbalances in the phases of said high frequency noise components, said inductance element having a negligible inductance to said power supply frequency component and a high inductance to said high frequency noise component which is superposed on the power supply frequency component.
Claim 3
Dependent Claim
20 words
A filter of the character defined in claim 1 wherein said plurality of lines are two going and returning lines.
Claim 4
Dependent Claim
18 words
A filter of the character defined in claim 1 wherein said plurality of lines are poly-phase AC lines.
Claim 5
Dependent Claim
34 words
A filter of the character defined in claim 1 wherein each winding of said plurality of lines consists of a plurality of insulated conductors twisted together or disposed in side-by-side relation with each other.
Claim 6
Dependent Claim
27 words
A filter of the character defined in claim 1 wherein said magnetic core comprises a plurality of magnetic cores each having a different permeability vs. frequency characteristic.
Claim 7
Dependent Claim
31 words
A filter of the character defined in claim 1, wherein said inductance element has output terminals connected to said plurality of lines, and a grounding capacitor connected to said output terminals.
Claim 8
Dependent Claim
35 words
A filter of the character defined in claim 1 wherein the windings wound around said same magnetic core are divided by spacers made of a conductor whose surfaces are sufficiently insulated and which are grounded.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |