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US4558229A Expired / Lapsed US ⏱️ 0.0 years remaining

Series ferroresonant regulated rectifier with added capacitor shunting the saturating reactor winding

Assignee: Nokia Bell Labs
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Filing: 1984-04-30
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Granted: 1985-12-10
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Expires: 2004-04-30
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Abstract

Abstract A series type ferroresonant regulator is modified by adding a second ferro-capacitor in parallel with the primary winding of the saturating transformer. This arrangement allows the transformer to operate at a much cooler temperature than is possible with a conventional series ferroresonant regulator of the same power rating.

Inventors

  • 👤 Richard P. Massey
  • 👤 Purnell E. Rowe

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 18:38
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/06; H02M7/068

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 214 words
A series type ferroresonant regulator comprising: an input means for accepting AC signals operating at substantially a single frequency, a transformer having a saturating core in response to AC signals from the input means such that initial operation of the saturating core is in a linear region and changes into a saturating region within each half-cycle of the AC signal, the transformer including a primary winding coupled to the input means and at least a first secondary winding, a ferrocapacitor having a first capacitance value and connecting the input means to the primary winding, and connected in series with the primary winding, a second capacitor having a second capacitance value and connected in parallel with the primary winding, the sum of the first and second capacitance values being a capacitance value series resonant with a linear region saturated inductance of the primary winding and saturating core and a ratio of the first and second capacitance values selected in accordance with a quality of a saturated inductance of the transformer so that a desired input/output voltage ratio is maintained and a voltage dividing action of the ferrocapacitor and the second capacitor significantly reduces a peak voltage across the primary winding, and output means connected to the first and second secondary winding and including rectification means.
Claim 2
Dependent Claim 214 words
A series type ferroresonant regulator comprising: an input means for accepting AC signals operating at substantially a single frequency, a transformer having a saturating core in response to AC signals from the input means such that initial operation of the saturating core is in a linear region and changes into a saturating region within each half-cycle of the AC signal, the transformer including a primary winding coupled to the input means and at least a first secondary winding, a ferrocapacitor having a first capacitance value and connecting the input means to the primary winding, and connected in series with the primary winding, a second capacitor having a second capacitance value and connected in parallel with the primary winding, the sum of the first and second capacitance values being a capacitance value series resonant with a linear region saturated inductance of the primary winding and saturating core and a ratio of the first and second capacitance values selected in accordance with a quality of a saturated inductance of the transformer so that a desired input/output voltage ratio is maintained and a voltage dividing action of the ferrocapacitor and the second capacitor significantly reduces a peak voltage across the primary winding, and output means connected to the first and second secondary winding and including rectification means.
Claim 3
Dependent Claim 42 words
A series type ferroresonant regulator as defined in claim 1 wherein: the transformer includes a second secondary winding, and second output means coupled thereto, the second secondary winding being center tapped and coupled through the second output means to energize two loads.

References Cited (Backward Citations)

US1932667A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1988-12-09 1989-06-10 1989-12-10 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1992-12-09 1993-06-10 1993-12-10 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1996-12-09 1997-06-10 1997-12-10 $7700.00 Window Closed / Lapsed

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