US5635828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Active filter circuit and power supply apparatus including same
Assignee: Proterial Ltd
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Filing: 1994-11-23
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Granted: 1997-06-03
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Expires: 2014-11-23
Abstract
Abstract An active filter circuit including a smoothing filter including a choke coil comprising a magnetic core composed of a nanocrystalline alloy and having a magnetic gap in at least one portion thereof and at least one conductive wire wound around the magnetic core, the nanocrystalline alloy having a composition of 0.1-3 atomic % of at least one element selected from the group consisting of Cu and Au, 1-7 atomic % of at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Mo and W, 10-17 atomic % of Si, and 4-10 atomic % of B, the balance being substantially Fe and inevitable impurities.
Inventors
- 👤 Yoshihito Yoshizawa
- 👤 Tooru Abe
- 👤 Shin Nakajima
- 👤 Shunsuke Arakawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:50
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/42; H02M1/4208; H02M1/4225; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/153; H01F1/15308; H01F17/00; H01F17/04; H01F17/06; H03; H03H; H03H19/00; H01F1/15333; Y; Y02; Y02B; Y02B70/00; Y02B70/10; Y02P; Y02P80/00; Y02P80/10; Y10; Y10S; Y10S977/00; Y10S977/70; Y10S977/773; Y10S977/775; Y10S977/776; Y10S977/777; Y10S977/832; Y10S977/838
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
47 words
A boosting chopper-type active filter circuit comprising a smoothing filter comprising a choke coil comprising a toroidal magnetic core made of a nanocrystalline alloy and having a magnetic gap in at least one portion thereof and at least one conductive wire wound around said toroidal magnetic core.
Claim 2
Dependent Claim
47 words
A boosting chopper-type active filter circuit comprising a smoothing filter comprising a choke coil comprising a toroidal magnetic core made of a nanocrystalline alloy and having a magnetic gap in at least one portion thereof and at least one conductive wire wound around said toroidal magnetic core.
Claim 3
Dependent Claim
47 words
A boosting chopper-type active filter circuit comprising a smoothing filter comprising a choke coil comprising a magnetic core composed of an insulating material and at least one of a nanocrystalline alloy powder and a nanocrystalline flake, and at least one conductive wire wound around said magnetic core.
Claim 4
Dependent Claim
47 words
A boosting chopper-type active filter circuit comprising a smoothing filter comprising a choke coil comprising a magnetic core composed of an insulating material and at least one of a nanocrystalline alloy powder and a nanocrystalline flake, and at least one conductive wire wound around said magnetic core.
Claim 5
Dependent Claim
78 words
The boosting chopper-type active filter circuit according to claim 1, wherein said nanocrystalline alloy is an Fe-base alloy comprising 0.1-3 atomic % of at least one element selected from the group consisting of Cu and Au, 1-7 atomic % of at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Mo and W, 10-17 atomic % of Si, and 4-10 atomic % of B, the balance being substantially Fe and inevitable impurities.
Claim 6
Dependent Claim
78 words
The boosting chopper-type active filter circuit according to claim 2, wherein said nanocrystalline alloy is an Fe-base alloy comprising 0.1-3 atomic % of at least one element selected from the group consisting of Cu and Au, 1-7 atomic % of at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Mo and W, 10-17 atomic % of Si, and 4-10 atomic % of B, the balance being substantially Fe and inevitable impurities.
Claim 7
Dependent Claim
82 words
The boosting chopper-type active filter circuit according to claim 1, wherein said nanocrystalline alloy is an Fe-base alloy comprising 0-3 atomic % of at least one element selected from the group consisting of Cu and Au, 2-10 atomic % of at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Mo and W, 0 to less than 10 atomic % of Si, and 2-10 atomic % of B, the balance being substantially Fe and inevitable impurities.
Claim 8
Dependent Claim
82 words
The boosting chopper-type active filter circuit according to claim 2, wherein said nanocrystalline alloy is an Fe-base alloy comprising 0-3 atomic % of at least one element selected from the group consisting of Cu and Au, 2-10 atomic % of at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Mo and W, 0 to less than 10 atomic % of Si, and 2-10 atomic % of B, the balance being substantially Fe and inevitable impurities.
Claim 9
Dependent Claim
21 words
The boosting chopper-type active filter circuit according to claim 2, wherein said insulating material is a heat-resistant organic or inorganic binder.
Claim 10
Dependent Claim
56 words
A power supply apparatus comprising an input circuit having a boosting chopper-type active filter circuit comprising a smoothing filter comprising a choke coil comprising a toroidal magnetic core made of a nanocrystalline alloy and having a magnetic gap in at least one portion thereof and at least one conductive wire wound around said toroidal magnetic core.
Claim 11
Dependent Claim
56 words
A power supply apparatus comprising an input circuit having a boosting chopper-type active filter circuit comprising a smoothing filter comprising a choke coil comprising a toroidal magnetic core made of a nanocrystalline alloy and having a magnetic gap in at least one portion thereof and at least one conductive wire wound around said toroidal magnetic core.
Claim 12
Dependent Claim
57 words
A power supply apparatus comprising an input circuit having a boosting chopper-type active filter circuit comprising a smoothing filter comprising a choke coil comprising a magnetic core composed of an insulating material and at least one of a nanocrystalline alloy powder and a nanocrystalline alloy flake and at least one conductive wire wound around said magnetic core.
Claim 13
Dependent Claim
57 words
A power supply apparatus comprising an input circuit having a boosting chopper-type active filter circuit comprising a smoothing filter comprising a choke coil comprising a magnetic core composed of an insulating material and at least one of a nanocrystalline alloy powder and a nanocrystalline alloy flake and at least one conductive wire wound around said magnetic core.
Claim 14
Dependent Claim
76 words
A power supply apparatus according to claim 8, wherein said nanocrystalline alloy is an Fe-base alloy comprising 0.1-3 atomic % of at least one element selected from the group consisting of Cu and Au, 1-7 atomic % of at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Mo and W, 10-17 atomic % of Si, and 4-10 atomic % of B, the balance being substantially Fe and inevitable impurities.
Claim 15
Dependent Claim
76 words
A power supply apparatus according to claim 9, wherein said nanocrystalline alloy is an Fe-base alloy comprising 0.1-3 atomic % of at least one element selected from the group consisting of Cu and Au, 1-7 atomic % of at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Mo and W, 10-17 atomic % of Si, and 4-10 atomic % of B, the balance being substantially Fe and inevitable impurities.
Claim 16
Dependent Claim
80 words
A power supply apparatus according to claim 8, wherein said nanocrystalline alloy is an Fe-base alloy comprising 0-3 atomic % of at least one element selected from the group consisting of Cu and Au, 2-10 atomic % of at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Mo and W, 0 to less than 10 atomic % of Si, and 2-10 atomic % of B, the balance being substantially Fe and inevitable impurities.
Claim 17
Dependent Claim
80 words
A power supply apparatus according to claim 9, wherein said nanocrystalline alloy is an Fe-base alloy comprising 0-3 atomic % of at least one element selected from the group consisting of Cu and Au, 2-10 atomic % of at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Mo and W, 0 to less than 10 atomic % of Si, and 2-10 atomic % of B, the balance being substantially Fe and inevitable impurities.
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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) | 2000-06-02 | 2000-12-02 | 2001-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-06-02 | 2004-12-02 | 2005-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-06-02 | 2008-12-02 | 2009-06-03 | $7700.00 | Window Closed / Lapsed |