US5038263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ripple current reduction circuit
Assignee: Revvity Inc
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Filing: 1990-01-03
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Granted: 1991-08-06
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Expires: 2010-01-03
Abstract
Abstract An improvement is provided for a circuit having a first winding of N 1 turns connected in series with a total inductance of L across a first voltage V 1 and a second steering winding of N 2 turns connected in series with a total inductance L 2 across a second voltage V 2 with the second winding magnetically coupled to the first winding and the first winding having an inductance L c produced by the N 1 turns as seen across the first winding comprising L 1 set substantially greater to zero and L 2 set substantially equal to (L c ) (N 2 /N 1 ) 2 ((V 2 /V 1 ) (N 1 /N 2 )-1)). The setting of L 1 and the setting of L 2 providing an improvement to reduce ac ripple current.
Inventors
- 👤 Joseph Marrero
- 👤 Christopher Peng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:19
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/14; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
157 words
In a circuit having a first winding of N 1 turns connected in series with a total inductance of L 1 across a first voltage V 1 and a second, steering winding of N 2 turns connected in series with a total inductance of L 2 across a second voltage V 2 , said second winding magnetically coupled to said first winding and said first winding having an inductance L c produced by said N 1 turns as seen across said first winding, the improvement to reduce ripple current in said first winding comprising: (a) L 2 set substantially equal to (N 2 /N 1 ) 2 (L c ) ((V 2 /V 1 ) (N 1 /N 2 )-1).; and (b) L 1 set sufficiently greater than L 2 to thereby shift substantially all the voltage V 1 across L c which has not otherwise been so shifted due to the setting of L 2 .
Claim 2
Dependent Claim
157 words
In a circuit having a first winding of N 1 turns connected in series with a total inductance of L 1 across a first voltage V 1 and a second, steering winding of N 2 turns connected in series with a total inductance of L 2 across a second voltage V 2 , said second winding magnetically coupled to said first winding and said first winding having an inductance L c produced by said N 1 turns as seen across said first winding, the improvement to reduce ripple current in said first winding comprising: (a) L 2 set substantially equal to (N 2 /N 1 ) 2 (L c ) ((V 2 /V 1 ) (N 1 /N 2 )-1).; and (b) L 1 set sufficiently greater than L 2 to thereby shift substantially all the voltage V 1 across L c which has not otherwise been so shifted due to the setting of L 2 .
Claim 3
Dependent Claim
12 words
The circuit of claim 1 wherein V 1 equals V 2 .
Claim 4
Dependent Claim
12 words
The circuit of claim 2 wherein N 1 equals N 2 .
Claim 5
Dependent Claim
16 words
The circuit of claim 1 wherein V 1 /N 1 equals V 2 /N 2 .
Claim 6
Dependent Claim
24 words
The circuit of claims 1, 2, 3 or 4 wherein said first winding is magnetically coupled to a third winding to form a transformer.
Claim 7
Dependent Claim
39 words
The circuit of claim 5 wherein said transformer has a core and wherein said second steering winding is wound closer to said core than said first and/or third windings and said first winding is wound furthest from said core.
Claim 8
Dependent Claim
139 words
In a circuit having a first winding of N 1 turns connected in series with a total inductance of L 1 across a first voltage V 1 and a second, steering winding of N 2 turns connected in series with a total inductance of L 2 across a second voltage V 2 , said second winding magnetically coupled to said first winding and said first winding having an inductance L c produced by said N 1 turns as seen across said first winding, the improvement to reduce ripple current in said first winding comprising: (a) L 2 set substantially equal to zero; and (b) L 1 set sufficiently greater than L 2 to thereby shift substantially all the voltage V 1 across L c which has not otherwise been so shifted due to the setting of L 2 .
Claim 9
Dependent Claim
139 words
In a circuit having a first winding of N 1 turns connected in series with a total inductance of L 1 across a first voltage V 1 and a second, steering winding of N 2 turns connected in series with a total inductance of L 2 across a second voltage V 2 , said second winding magnetically coupled to said first winding and said first winding having an inductance L c produced by said N 1 turns as seen across said first winding, the improvement to reduce ripple current in said first winding comprising: (a) L 2 set substantially equal to zero; and (b) L 1 set sufficiently greater than L 2 to thereby shift substantially all the voltage V 1 across L c which has not otherwise been so shifted due to the setting of L 2 .
Claim 10
Dependent Claim
12 words
The circuit of claim 7 wherein V 1 equals V 2 .
Claim 11
Dependent Claim
12 words
The circuit of claim 8 wherein N 1 equals N 2 .
Claim 12
Dependent Claim
16 words
The circuit of claim 7 wherein V 1 /N 1 equals V 2 /N 2 .
Claim 13
Dependent Claim
24 words
The circuit of claims 7, 8, 9 or 10 wherein said first winding is magnetically coupled to a third winding to form a transformer.
Claim 14
Dependent Claim
39 words
The circuit of claim 11 wherein said transformer has a core and wherein said second steering winding is wound closer to said core than said first and/or third windings and said first winding is wound furthest from said core.
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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) | 1994-08-05 | 1995-02-04 | 1995-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-05 | 1999-02-04 | 1999-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-05 | 2003-02-04 | 2003-08-06 | $7700.00 | Window Closed / Lapsed |