US4378585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Free-running blocking oscillator-type converter
Assignee: Siemens AG
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Filing: 1981-02-12
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Granted: 1983-03-29
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Expires: 2001-02-12
Abstract
Abstract A free-running blocking oscillator-type converter for producing a controlled output signal. The converter is provided with a primary winding of a transformer, a switching transistor, and a resistor which are connected in series with one another between first and second input terminals of the converter. The transformer is further provided with a feedback winding which is coupled to the base terminal of the switching transistor. In some embodiments, optoelectronic coupling devices are used in a sensor arrangement for providing a control signal responsive to variations in the magnitude of the output signal of the converter. In other embodiments, such variations in the output signal of the converter are sensed by a transformer winding. Circuitry is disclosed for applying the sensor control signal selectably to the base and emitter terminals of the switching transistor.
Inventors
- 👤 Manfred Bete
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:54
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/338; Y; Y10; Y10S; Y10S323/00; Y10S323/902
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
181 words
A free-running blocking oscillator-type converter of the type having a switching transistor in series with a primary winding of a transformer, the transformer having a secondary winding connected in series with a rectifier, and with a smoothing filter between first and second output terminals of the converter, the transformer further having a feedback winding which is coupled to a base terminal of the switching transistor, the converter further comprising: first resistor means, diode means, and capacitor means, connected in series with one another between the first and second input terminals of the converter, said first resistor means and said diode means being coupled to one another at a first node, said first node being further connected to the base terminal of the switching transistor, said diode means and said capacitor means being coupled to one another at a second node; sensor means for detecting variations in a voltage across the first and second output terminals, said sensor means being coupled to said second node; and second resistor means for coupling the switching transistor to said second input terminal of the converter.
Claim 2
Dependent Claim
181 words
A free-running blocking oscillator-type converter of the type having a switching transistor in series with a primary winding of a transformer, the transformer having a secondary winding connected in series with a rectifier, and with a smoothing filter between first and second output terminals of the converter, the transformer further having a feedback winding which is coupled to a base terminal of the switching transistor, the converter further comprising: first resistor means, diode means, and capacitor means, connected in series with one another between the first and second input terminals of the converter, said first resistor means and said diode means being coupled to one another at a first node, said first node being further connected to the base terminal of the switching transistor, said diode means and said capacitor means being coupled to one another at a second node; sensor means for detecting variations in a voltage across the first and second output terminals, said sensor means being coupled to said second node; and second resistor means for coupling the switching transistor to said second input terminal of the converter.
Claim 3
Dependent Claim
137 words
A free-running blocking oscillator-type converter of the type having a switching transistor in series with a primary winding of a transformer, the transformer having a secondary winding connected in series with a rectifier, and with a smoothing filter between first and second output terminals of the converter, the transformer further having a feedback winding which is coupled to a base terminal of the switching transistor, the converter further comprising: capacitor means, resistor means, and control transistor means connected in an electrically parallel combination, the parallel combination being electrically disposed between the switching transistor and the second input terminal of the converter; and sensor means for detecting variations in an output voltage of the converter, said sensor means being connected to a base terminal of said control transistor means for controlling a charge stored in said capacitor means.
Claim 4
Dependent Claim
137 words
A free-running blocking oscillator-type converter of the type having a switching transistor in series with a primary winding of a transformer, the transformer having a secondary winding connected in series with a rectifier, and with a smoothing filter between first and second output terminals of the converter, the transformer further having a feedback winding which is coupled to a base terminal of the switching transistor, the converter further comprising: capacitor means, resistor means, and control transistor means connected in an electrically parallel combination, the parallel combination being electrically disposed between the switching transistor and the second input terminal of the converter; and sensor means for detecting variations in an output voltage of the converter, said sensor means being connected to a base terminal of said control transistor means for controlling a charge stored in said capacitor means.
Claim 5
Dependent Claim
55 words
The free-running blocking oscillator-type converter of claim 1 or 2 wherein said sensor means further comprises Zener diode means and optoelectronic coupling device diode means connected in series with one another between the output terminals of the converter, and optoelectronic coupling device transistor means having collector and emitter terminals for providing a sensor output signal.
Claim 6
Dependent Claim
92 words
The free-running blocking oscillator-type converter of claim 1 or 2 wherein said sensor means further comprises; measuring winding means in the transformer for producing a signal responsive to variations in a voltage across the output terminals of the converter; threshold detector means having a rectifier diode, Zener diode, and a resistor in series with one another; and auxiliary transistor means having collector and emitter terminals for providing a sensor output signal, and a base terminal connected to a junction point of said Zener diode and said resistor in said threshold detector means.
Claim 7
Dependent Claim
23 words
The free-running blocking oscillator-type converter of claim 1 wherein there is further provided a shunt resistance connected electrically parallel with said capacitor means.
Claim 8
Dependent Claim
22 words
The free-running blocking oscillator-type converter of claim 1 or 2 wherein there is further provided amplifier means connected to said sensor means.
Claim 9
Dependent Claim
45 words
The free-running blocking oscillator-type converter of claim 1 or 2 wherein there is further provided Zener diode voltage limiter means for limiting a voltage at said base terminal of the switching transistor, with respect to a voltage on the second input terminal of the converter.
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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) | 1986-03-28 | 1986-09-27 | 1987-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-28 | 1990-09-27 | 1991-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-28 | 1994-09-27 | 1995-03-29 | $7700.00 | Window Closed / Lapsed |