US4884180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regulated direct-current converter
Assignee: Wandel and Golterman GmbH and Co
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Filing: 1988-11-18
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Granted: 1989-11-28
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Expires: 2008-11-18
Abstract
Abstract A dc converter for supplying an electronic device in which a feed voltage is summed with an additional voltage generated by rectification and wherein pulse-width control is provided at the primary side of the converter transformer. According to the invention, the additional voltage is generated by rectification in the same manner as the main output voltage is generated, i.e. the rectifier circuit outputting the additional voltage is similar to that outputting the output voltage.
Inventors
- 👤 Gunther Hoffmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:59
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/33561; H02M3/337; H02M3/3376; H02M3/3378
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
108 words
A direct-current converter for producing an output voltage from a feed voltage, comprising: a converter transformer having a primary winding and at least one secondary winding; a pulse-width control circuit connected in series with said primary winding; a main-voltage rectifier circuit connected with said secondary winding for outputting a main output voltage; means for controlling said pulse-width control circuit in response to said main output voltage; an additional-voltage rectifier circuit connected to output an additional voltage and generating said additional voltage by a rectification similar to that producing said main output voltage; and means for applying a feed voltage and said additional voltage additively to said primary winding.
Claim 2
Dependent Claim
108 words
A direct-current converter for producing an output voltage from a feed voltage, comprising: a converter transformer having a primary winding and at least one secondary winding; a pulse-width control circuit connected in series with said primary winding; a main-voltage rectifier circuit connected with said secondary winding for outputting a main output voltage; means for controlling said pulse-width control circuit in response to said main output voltage; an additional-voltage rectifier circuit connected to output an additional voltage and generating said additional voltage by a rectification similar to that producing said main output voltage; and means for applying a feed voltage and said additional voltage additively to said primary winding.
Claim 3
Dependent Claim
21 words
The direct-current converter defined in claim 1 wherein said transformer has a further secondary winding connected to supply said additional-voltage rectifier.
Claim 4
Dependent Claim
14 words
The direct-current converter defined in claim 2 wherein the converter is a blocking converter.
Claim 5
Dependent Claim
20 words
The direct-current converter defined in claim 3 wherein each of said rectifier and pulse-width control circuits is a push-pull circuit.
Claim 6
Dependent Claim
24 words
The direct-current converter defined in claim 4 wherein the push-pull rectifier circuits each have a common load condenser for a pair of push-pull rectifiers.
Claim 7
Dependent Claim
71 words
The direct-current converter defined in claim 3 wherein said primary winding and said further secondary winding have the same number of turns, said pulse-width control circuit includes a transistor having an emitter-collector network connected to one end of said primary winding, and the other end of said primary winding is connected to an end of said further secondary winding to which a rectifier element of said additional-voltage rectifier circuit is connected.
Claim 8
Dependent Claim
51 words
The direct-current converter defined in claim 1 wherein each of said rectifier circuits includes a rectifier diode in series with a winding of said transformer, a choke in series with the respective rectifier diode, and a load condenser fed through the respective choke and across which a respective voltage is drawn.
Claim 9
Dependent Claim
37 words
The direct-current converter defined in claim 7 wherein said pulse-width control circuit includes a transistor having an emitter-collector network connected in series with said primary winding, and a pulse-width controller connected to a base of said transistor.
Claim 10
Dependent Claim
25 words
The direct-current converter defined in claim 8 wherein said feed voltage is generated by a battery applied across said primary winding and said emitter-collector network.
Claim 11
Dependent Claim
33 words
The direct-current converter defined in claim 8 wherein said feed voltage is generated by a rectifier connected to a source of line current and connected across said primary winding and said emitter-collector network.
Claim 12
Dependent Claim
26 words
The direct-current converter defined in claim 7 wherein each of said rectifier circuits includes a pair of secondary windings and respective rectifier elements connected in push-pull.
Claim 13
Dependent Claim
22 words
The direct-current converter defined in claim 7 wherein said primary winding is one of a pair of primary windings connected in push-pull.
Claim 14
Dependent Claim
18 words
The direct-current converter defined in claim 7 wherein said additional-voltage rectifier circuit is connected across said primary winding.
Claim 15
Dependent Claim
130 words
A direct-current converter for producing an output voltage from a feed voltage, comprising: a converter transformer having a primary winding and at least one secondary winding; a pulse-width control circuit connected in series with said primary winding; a main-voltage rectifier circuit connected with said secondary winding for outputting a main output voltage; means for controlling said pulse-width control circuit in response to said main output voltage; an additional-voltage rectifier circuit connected to output an additional voltage and generating said additional voltage by a rectification similar to that producing said main output voltage; and means for applying a feed voltage and said additional voltage additively to said primary winding, said converter being a through-flow converter and said additional-voltage rectifier circuit being connected across said primary winding to rectify a voltage thereacross.
Claim 16
Dependent Claim
130 words
A direct-current converter for producing an output voltage from a feed voltage, comprising: a converter transformer having a primary winding and at least one secondary winding; a pulse-width control circuit connected in series with said primary winding; a main-voltage rectifier circuit connected with said secondary winding for outputting a main output voltage; means for controlling said pulse-width control circuit in response to said main output voltage; an additional-voltage rectifier circuit connected to output an additional voltage and generating said additional voltage by a rectification similar to that producing said main output voltage; and means for applying a feed voltage and said additional voltage additively to said primary winding, said converter being a through-flow converter and said additional-voltage rectifier circuit being connected across said primary winding to rectify a voltage thereacross.
Claim 17
Dependent Claim
15 words
The direct-current converter defined in claim 14 wherein said rectifier circuits include magnetically coupled chokes.
Claim 18
Dependent Claim
21 words
The direct-current converter defined in claim 14 wherein said transformer has a further secondary winding connected to supply said additional-voltage rectifier.
Claim 19
Dependent Claim
51 words
The direct-current converter defined in claim 14 wherein each of said rectifier circuits includes a rectifier diode in series with a winding of said transformer, a choke in series with the respective rectifier diode, and a load condenser fed through the respective choke and across which a respective voltage is drawn.
Claim 20
Dependent Claim
37 words
The direct-current converter defined in claim 17 wherein said pulse-width control circuit includes a transistor having an emitter-collector network connected in series with said primary winding, and a pulse-width controller connected to a base of said transistor.
Claim 21
Dependent Claim
26 words
The direct-current converter defined in claim 18 wherein said feed voltage is generated by a battery applied across said primary winding and said emitter collector network.
Claim 22
Dependent Claim
34 words
The direct-current converter defined in claim 18 wherein said feed voltage is generated by a rectifier connected to a source of line current and connected across said primary winding and said emitter collector network.
Claim 23
Dependent Claim
26 words
The direct-current converter defined in claim 17 wherein each of said rectifier circuits includes a pair of secondary windings and respective rectifier elements connected in push-pull.
Claim 24
Dependent Claim
22 words
The direct-current converter defined in claim 17 wherein said primary winding is one of a pair of primary windings connected in push-pull.
Claim 25
Dependent Claim
18 words
The direct-current converter defined in claim 17 wherein said additional-voltage rectifier circuit is connected across said primary winding.
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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) | 1992-11-27 | 1993-05-29 | 1993-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-27 | 1997-05-29 | 1997-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-27 | 2001-05-29 | 2001-11-28 | $7700.00 | Window Closed / Lapsed |