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Patent US5886891A successfully refreshed from Google Patents.
US5886891A
Expired / Lapsed
US
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Three-phase boost converter having wye-connected input capacitors and method of operation thereof
Assignee: Nokia of America Corp
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Filing: 1998-07-17
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Granted: 1999-03-23
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Expires: 2018-07-17
Abstract
Abstract A three-phase boost converter having wye-connected input capacitors and a method of operating the same. The boost converter includes first, second and third phase inputs and an output. In one embodiment, the boost converter includes first, second and third inductors coupled to the first, second and third phase inputs, respectively, and operable in a discontinuous conduction mode (DCM). The boost converter further includes first and second switches coupled between corresponding rails of the output. The boost converter still further includes first, second and third capacitors coupled between the first, second and third phase inputs, respectively, and a node between the first and second switches. The first and second switches cooperate progressively to employ a voltage across the rails less a voltage across the first, second and third capacitors to discharge currents through the first, second and third inductors, respectively, and thereby reduce input current THD on all three of the phase inputs.
Inventors
- 👤 Yimin Jiang
- 👤 Hengchun Mao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:14
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/42; H02M1/4208; H02M1/4216; Y; Y02; Y02B; Y02B70/00; Y02B70/10
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
124 words
A boost converter having first, second and third phase inputs and an output, comprising: first, second and third inductors coupled to said first, second and third phase inputs, respectively, and operable in a discontinuous conduction mode (DCM); first and second switches coupled between corresponding rails of said output; and first, second and third capacitors coupled between said first, second and third phase inputs, respectively, and a node between said first and second switches, said first and second switches cooperating progressively to employ a voltage across said rails less a voltage across said first, second and third capacitors to discharge currents through said first, second and third inductors, respectively, and thereby reduce input current total harmonic distortion (THD) on all three of said phase inputs.
Claim 2
Dependent Claim
124 words
A boost converter having first, second and third phase inputs and an output, comprising: first, second and third inductors coupled to said first, second and third phase inputs, respectively, and operable in a discontinuous conduction mode (DCM); first and second switches coupled between corresponding rails of said output; and first, second and third capacitors coupled between said first, second and third phase inputs, respectively, and a node between said first and second switches, said first and second switches cooperating progressively to employ a voltage across said rails less a voltage across said first, second and third capacitors to discharge currents through said first, second and third inductors, respectively, and thereby reduce input current total harmonic distortion (THD) on all three of said phase inputs.
Claim 3
Dependent Claim
24 words
The boost converter as recited in claim 1 wherein a common terminal of said first, second and third capacitors are coupled to said node.
Claim 4
Dependent Claim
25 words
The boost converter as recited in claim 2 wherein a common terminal of said first, second and third capacitors are coupled to a neutral potential.
Claim 5
Dependent Claim
26 words
The boost converter as recited in claim 1 further comprising a rectifier interposed between said first, second and third inductors and said first and second switches.
Claim 6
Dependent Claim
20 words
The boost converter as recited in claim 1 further comprising an output capacitor coupled across said first and second switches.
Claim 7
Dependent Claim
23 words
The boost converter as recited in claim 1 wherein said first and second switches each conduct for a duty cycle of about 50%.
Claim 8
Dependent Claim
16 words
The boost converter as recited in claim 1 further comprising a diode coupled to said output.
Claim 9
Dependent Claim
28 words
The boost converter as recited in claim 1 further comprising a plurality of diodes interposed between said first, second and third inductors and said first and second switches.
Claim 10
Dependent Claim
24 words
The boost converter as recited in claim 1 further comprising an electromagnetic interference (EMI) filter coupled to said first, second and third phase inputs.
Claim 11
Dependent Claim
20 words
The boost converter as recited in claim 1 further comprising a regulation circuit that controls said first and second switches.
Claim 12
Independent Claim
126 words
A method of operating a boost converter having first, second and third phase inputs and an output, comprising: operating first, second and third inductors coupled to said first, second and third phase inputs, respectively, in a discontinuous conduction mode (DCM); coupling first and second switches between corresponding rails of said output; coupling first, second and third capacitors between said first, second and third phase inputs, respectively, and a node between first and second switches; and controlling said first and second switches progressively to employ a voltage across said rails less a voltage across said first, second and third capacitors to discharge currents through said first, second and third inductors, respectively, and thereby reduce input current total harmonic distortion (THD) on all three of said phase inputs.
Claim 13
Independent Claim
126 words
A method of operating a boost converter having first, second and third phase inputs and an output, comprising: operating first, second and third inductors coupled to said first, second and third phase inputs, respectively, in a discontinuous conduction mode (DCM); coupling first and second switches between corresponding rails of said output; coupling first, second and third capacitors between said first, second and third phase inputs, respectively, and a node between first and second switches; and controlling said first and second switches progressively to employ a voltage across said rails less a voltage across said first, second and third capacitors to discharge currents through said first, second and third inductors, respectively, and thereby reduce input current total harmonic distortion (THD) on all three of said phase inputs.
Claim 14
Dependent Claim
21 words
The method as recited in claim 11 further comprising coupling a common terminal of said first, second and third capacitors together.
Claim 15
Dependent Claim
25 words
The boost converter as recited in claim 12 further comprising coupling said common terminal of said first, second and third capacitors to a neutral potential.
Claim 16
Dependent Claim
19 words
The method as recited in claim 11 further comprising rectifying a voltage from said first, second and third inductors.
Claim 17
Dependent Claim
13 words
The method as recited in claim 11 further comprising filtering an output voltage.
Claim 18
Dependent Claim
24 words
The method as recited in claim 11 further comprising inducing said first and second switches to conduct for a duty cycle of about 50%.
Claim 19
Dependent Claim
23 words
The method as recited in claim 11 further comprising extending a duty cycle of at least one of said first and second switches.
Claim 20
Dependent Claim
42 words
The method as recited in claim 17 wherein the act of extending is performed by one of: a plurality of diodes interposed between said first, second and third inductors and said first and second switches, and a diode coupled to said output.
Claim 21
Dependent Claim
21 words
The method as recited in claim 11 further comprising filtering electromagnetic interference (EMI) at said first, second and third phase inputs.
Claim 22
Dependent Claim
18 words
The method as recited in claim 11 wherein the act of controlling is performed by a regulation circuit.
References Cited (Backward Citations)
US5345375A
Cited
US5414613A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-03-22 | 2002-09-21 | 2003-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-03-22 | 2006-09-21 | 2007-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-03-22 | 2010-09-21 | 2011-03-23 | $7700.00 | Window Closed / Lapsed |