US5701243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-power factor series resonant rectifier circuit
Assignee: KT Corp
•
Filing: 1995-12-12
•
Granted: 1997-12-23
•
Expires: 2015-12-12
Abstract
Abstract A high-power factor series resonant rectifier circuit comprising a first rectifier for rectifying an AC input power, a push-pull switching circuit for changing a polarity in the output of the first rectifier in response to a resonant frequency, an isolation transformer for transforming the output of the push-pull switching circuit, an LC resonance tank for resonating the output of the isolation transformer, a second rectifier for rectifying the output of the LC resonant tank, and a boost chopper switch connected in parallel to the output of the second rectifier. The boost chopper switch performs a switching operation when a resonant current becomes zero, resulting in an increase in power density. The increase in power density results in a reduction in switching loss. Therefore, the rectifier circuit of the present invention is operable at a high frequency.
Inventors
- 👤 Myung Joong Youn
- 👤 Gun Woo Moon
- 👤 Marn Go Kim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:09
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/42; H02M1/4208; H02M1/4241; H02M7/00; Y; Y02; Y02B; Y02B70/00; Y02B70/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
84 words
A high-power factor series resonant rectifier circuit comprising: a first rectifying means for rectifying an AC input signal to produce a first rectified output; a polarity changing means for changing polarity of the first rectified output in response to a resonant frequency to produce an alternating output; an isolation transforming means for transforming the alternating output to produce a transformer output; and a resonant means for resonating the transformer output to produce a resonated output, the resonant frequency being associated with the resonant means.
Claim 2
Dependent Claim
84 words
A high-power factor series resonant rectifier circuit comprising: a first rectifying means for rectifying an AC input signal to produce a first rectified output; a polarity changing means for changing polarity of the first rectified output in response to a resonant frequency to produce an alternating output; an isolation transforming means for transforming the alternating output to produce a transformer output; and a resonant means for resonating the transformer output to produce a resonated output, the resonant frequency being associated with the resonant means.
Claim 3
Dependent Claim
43 words
A high-power factor series resonant rectifier circuit as set forth in claim 1, further comprising: second rectifying means for rectifying the resonated output and to produce a second rectified output; and boost chopper switching means connected in parallel with the second rectified output.
Claim 4
Dependent Claim
34 words
A high-power factor series resonant rectifier circuit as set forth in claim 2, wherein said boost chopper switching means is turned on/off whenever a resonant current becomes zero in response to the resonant frequency.
Claim 5
Dependent Claim
39 words
A high-power factor series resonant rectifier circuit as set forth in claim 1, wherein said polarity changing means includes a pair of push-pull switches for alternately switching polarity of the first rectified output applied to said isolation transforming means.
Claim 6
Dependent Claim
30 words
A high-power factor series resonant rectifier circuit as set forth in claim 1, wherein said resonant means includes a coil and a capacitor connected in series to the transformer output.
Claim 7
Dependent Claim
45 words
A high-power factor series resonant rectifier circuit as set forth in claim 4, wherein said polarity changing means is adapted to change the polarity of the first rectified output whenever a resonant current of said resonant means becomes zero in response to the resonant frequency.
Claim 8
Dependent Claim
92 words
A high-power factor series resonant rectifier circuit comprising: a first rectifying means for rectifying an AC input signal to produce a first rectified output; a polarity changing means for changing polarity of the first rectified output in response to a resonant frequency to produce an alternating output; an isolation transforming means for transforming the alternating output to produce a transformer output; and a series resonant means for resonating the transformer output to produce a resonated output in series with the series resonant means, the resonant frequency being associated with the resonant means.
Claim 9
Dependent Claim
92 words
A high-power factor series resonant rectifier circuit comprising: a first rectifying means for rectifying an AC input signal to produce a first rectified output; a polarity changing means for changing polarity of the first rectified output in response to a resonant frequency to produce an alternating output; an isolation transforming means for transforming the alternating output to produce a transformer output; and a series resonant means for resonating the transformer output to produce a resonated output in series with the series resonant means, the resonant frequency being associated with the resonant means.
Claim 10
Dependent Claim
100 words
A high-power factor series resonant rectifier circuit comprising: a first rectifying means for rectifying an AC input signal to produce a first rectified output; a polarity changing means for changing polarity of the first rectified output in response to a resonant frequency to produce an alternating output; an isolation transforming means for transforming the alternating output to produce a transformer output; a resonant means for resonating the transformer output to produce a resonated output, the resonant frequency being associated with the resonant means; and a second rectifying means for rectifying the resonated output and to produce a second rectified output.
Claim 11
Dependent Claim
100 words
A high-power factor series resonant rectifier circuit comprising: a first rectifying means for rectifying an AC input signal to produce a first rectified output; a polarity changing means for changing polarity of the first rectified output in response to a resonant frequency to produce an alternating output; an isolation transforming means for transforming the alternating output to produce a transformer output; a resonant means for resonating the transformer output to produce a resonated output, the resonant frequency being associated with the resonant means; and a second rectifying means for rectifying the resonated output and to produce a second rectified output.
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) | 2000-12-22 | 2001-06-23 | 2001-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-12-22 | 2005-06-23 | 2005-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-12-22 | 2009-06-23 | 2009-12-23 | $7700.00 | Window Closed / Lapsed |