US4424459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High frequency switching circuit
Assignee: Toshiba Corp
•
Filing: 1982-06-22
•
Granted: 1984-01-03
•
Expires: 2002-06-22
Abstract
Abstract A high frequency switching circuit comprised of a single-ended switching circuit, rectifying-smoothing circuit and magnetic amplifier which is connected between said single-ended switching circuit and rectifying-smoothing circuit. The magnetic amplifier includes a saturable reactor which has a coercive force Hc of 0.6 Oe or above and a rectangular ratio Br/Bs of 80% or below at an operating frequency of 20 kHz. The saturable reactor is prepared from an amorphous magnetic alloy having a composition of (Co1-a-b-c Fea Nib Mc)1-d Xd where: M=one element selected from a group consisting of the elements of Nb, Cr, Mo, V, Ta, Ti, Zr and W X=B or a compound of B and Si in which the content of Si is set at 25 atomic % or less 0.04</=a</=0.15 0</=b</=0.10 0.005</=c</=0.10 0.15</=d</=0.30.
Inventors
- 👤 Koichiro Inomata
- 👤 Michio Hasegawa
- 👤 Toshihiro Onodera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:03
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/337; H02M3/3372; H02M3/33538
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
201 words
A high frequency switching circuit which comprises: a single-ended switching circuit including a transformer having a primary winding and a secondary side circuit and a switching element connected between the primary winding of said transformer and DC source; means for effecting switching with a predetermined cycle and for a predetermined conductive period; means for rectifying and smoothing a supplied voltage, which includes a filtering capacitor connected in parallel with a rectifying element and load; and a magnetic amplifier which is connected between said secondary side circuit of said transformer and said rectifying-smoothing means and includes a saturable reactor, said saturable reactor having a coercive force Hc of 0.6 Oe or below and a rectangular ratio Br/Bs of 80% or above at an operating frequency of 20 kHz or above and being prepared from an amorphous alloy having a composition of (Co u Fe v Ni w ) 100-z X z or (Co.sub.u Fe.sub.1-u).sub.100-x-y T.sub.x B.sub.y where: x=at least one selected from a group consisting of the elements of P, B, C, Si and Ge 0≦u≦1.0 0≦v≦1.0 0≦w≦0.7 1≦ z≦30 u+v+w=1.0 T=at least one selected from a group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and W 6≦x≦15 0≦y≦10.
Claim 2
Dependent Claim
201 words
A high frequency switching circuit which comprises: a single-ended switching circuit including a transformer having a primary winding and a secondary side circuit and a switching element connected between the primary winding of said transformer and DC source; means for effecting switching with a predetermined cycle and for a predetermined conductive period; means for rectifying and smoothing a supplied voltage, which includes a filtering capacitor connected in parallel with a rectifying element and load; and a magnetic amplifier which is connected between said secondary side circuit of said transformer and said rectifying-smoothing means and includes a saturable reactor, said saturable reactor having a coercive force Hc of 0.6 Oe or below and a rectangular ratio Br/Bs of 80% or above at an operating frequency of 20 kHz or above and being prepared from an amorphous alloy having a composition of (Co u Fe v Ni w ) 100-z X z or (Co.sub.u Fe.sub.1-u).sub.100-x-y T.sub.x B.sub.y where: x=at least one selected from a group consisting of the elements of P, B, C, Si and Ge 0≦u≦1.0 0≦v≦1.0 0≦w≦0.7 1≦ z≦30 u+v+w=1.0 T=at least one selected from a group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and W 6≦x≦15 0≦y≦10.
Claim 3
Dependent Claim
79 words
The high frequency switching circuit according to claim 1, wherein the magnetic alloy has a composition of (Co 1-a-b-c Fe a Ni b M c ) 1-d X d where: M=at least one selected from a group consisting of the elements of Nb, Cr, Mo, V, Ta, Ti, Zr, Mn, Hf and W X=B or a compound of B and Si in which the content of Si is set at 25 atomic % or less 0.04≦a≦0.15 0≦b≦0.10 0.005≦c≦0.10 0.15≦d≦0.30.
Claim 4
Dependent Claim
51 words
The high frequency switching circuit according to claim 1, wherein the amorphous magnetic alloy has a composition of (Fe 1-a Ni a ) 1-b X b where: X=B or a compound of B and Si in which the amount of Si is set at 25 atomic % or less 0.3≦a≦0.7 0.15≦b≦0.30.
Claim 5
Dependent Claim
32 words
The high frequency switching circuit according to claim 1, wherein the amorphous magnetic alloy has a composition of (Co 1-z Fe z ) 100-x-y T x B y where: 8≦x≦12 0≦y≦7 0.01≦z≦0.10.
Claim 6
Dependent Claim
33 words
The high frequency switching circuit according to any of claims 1 to 4, wherein said single-ended switching circuit further includes a resonance capacitor connected in parallel with the primary winding of the transformer.
Claim 7
Dependent Claim
53 words
The high frequency switching circuit according to any of claims 1 to 4, wherein said magnetic amplifier further includes reflux means which is connected in parallel with said rectifying-smoothing means to allow for the passage of current stored in said saturable reactor and forms a closed circuit in co-operation with the rectifying-smoothing means.
Claim 8
Dependent Claim
25 words
The high frequency switching circuit according to claim 6, wherein said reflux means includes a diode and variable resistor connected in series with said diode.
Claim 9
Dependent Claim
28 words
The high frequency switching circuit according to any of claims 1 to 4, wherein said single-ended switching circuit further includes a damper diode connected across the switching element.
Claim 10
Dependent Claim
27 words
The high frequency switching circuit according to claim 1, which further comprises a choke coil connected between the output terminal of said rectifying means and a load.
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) | 1987-01-02 | 1987-07-04 | 1988-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-02 | 1991-07-04 | 1992-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-02 | 1995-07-04 | 1996-01-03 | $7700.00 | Window Closed / Lapsed |