Patent US3715606A successfully refreshed from Google Patents.
US3715606A
Expired / Lapsed
US
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Method of pulse control of high-voltage rectifiers, for example thyristors, operating in a polyphase converter, and a control system to realize said method
Assignee: Individual
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Filing: 1970-12-24
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Granted: 1973-02-06
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Expires: 1990-12-24
Abstract
Abstract A method and system are characterized in that narrow control pulses are applied to the rectifiers in the presence of a positive voltage across them at the beginning of their conduction interval and at the subsequent passages of the voltage across each rectifier through zero from a negative to a positive value during the entire conduction interval of the rectifier. The method keeps to a minimum overvoltages in converters operating in the 0-1 mode and completely eliminates the presence of a positive signal at the control electrodes of the thyristors dangerous to them.
Inventors
- 👤 L Travin
- 👤 V Spuv
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:23
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/08; H02M1/083
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
258 words
A system for pulse control of high-voltage rectifiers including control electrodes and having conduction intervals and operating in a polyphase converter, comprising a plurality of system components adopted to operate at different potentials and including a phase-inverter to vary the phase of control pulses and including an output; a synchronizer including an output and connected to the output of said phase-inverter and determining the onset and duration of conduction intervals of the rectifiers; a control-pulse shaper-amplifier including an output and an input; a control-pulse distributor connected to the output of said shaper-amplifier to transmit and distribute control pulses to the control electrodes of the rectifier; a feedback circuit comprising a sensor including an output and sensing the polarity and passage of the rectifier voltage through zero and connected in parallel with the rectifier, an information link for linking the system components operating at different potentials, and an AND gate including two inputs one of which is connected to the output of said synchronizer and the other of which is connected to the output of said sensor of the polarity and passage of the rectifier voltage through zero, said gate including an output connected to the input of said control-pulse shaper-amplifier, while said feedback circuit enables narrow control pulses to be applied to the rectifier in the presence of a positive voltage across it at the beginning of its conduction interval and also at the subsequent instants when the rectifier voltage passes through zero from a negative to a positive value during the entire conduction interval of the rectifier.
Claim 2
Independent Claim
258 words
A system for pulse control of high-voltage rectifiers including control electrodes and having conduction intervals and operating in a polyphase converter, comprising a plurality of system components adopted to operate at different potentials and including a phase-inverter to vary the phase of control pulses and including an output; a synchronizer including an output and connected to the output of said phase-inverter and determining the onset and duration of conduction intervals of the rectifiers; a control-pulse shaper-amplifier including an output and an input; a control-pulse distributor connected to the output of said shaper-amplifier to transmit and distribute control pulses to the control electrodes of the rectifier; a feedback circuit comprising a sensor including an output and sensing the polarity and passage of the rectifier voltage through zero and connected in parallel with the rectifier, an information link for linking the system components operating at different potentials, and an AND gate including two inputs one of which is connected to the output of said synchronizer and the other of which is connected to the output of said sensor of the polarity and passage of the rectifier voltage through zero, said gate including an output connected to the input of said control-pulse shaper-amplifier, while said feedback circuit enables narrow control pulses to be applied to the rectifier in the presence of a positive voltage across it at the beginning of its conduction interval and also at the subsequent instants when the rectifier voltage passes through zero from a negative to a positive value during the entire conduction interval of the rectifier.
Claim 3
Independent Claim
258 words
A system for pulse control of high-voltage rectifiers including control electrodes and having conduction intervals and operating in a polyphase converter, comprising a plurality of system components adopted to operate at different potentials and including a phase-inverter to vary the phase of control pulses and including an output; a synchronizer including an output and connected to the output of said phase-inverter and determining the onset and duration of conduction intervals of the rectifiers; a control-pulse shaper-amplifier including an output and an input; a control-pulse distributor connected to the output of said shaper-amplifier to transmit and distribute control pulses to the control electrodes of the rectifier; a feedback circuit comprising a sensor including an output and sensing the polarity and passage of the rectifier voltage through zero and connected in parallel with the rectifier, an information link for linking the system components operating at different potentials, and an AND gate including two inputs one of which is connected to the output of said synchronizer and the other of which is connected to the output of said sensor of the polarity and passage of the rectifier voltage through zero, said gate including an output connected to the input of said control-pulse shaper-amplifier, while said feedback circuit enables narrow control pulses to be applied to the rectifier in the presence of a positive voltage across it at the beginning of its conduction interval and also at the subsequent instants when the rectifier voltage passes through zero from a negative to a positive value during the entire conduction interval of the rectifier.
Claim 4
Independent Claim
258 words
A system for pulse control of high-voltage rectifiers including control electrodes and having conduction intervals and operating in a polyphase converter, comprising a plurality of system components adopted to operate at different potentials and including a phase-inverter to vary the phase of control pulses and including an output; a synchronizer including an output and connected to the output of said phase-inverter and determining the onset and duration of conduction intervals of the rectifiers; a control-pulse shaper-amplifier including an output and an input; a control-pulse distributor connected to the output of said shaper-amplifier to transmit and distribute control pulses to the control electrodes of the rectifier; a feedback circuit comprising a sensor including an output and sensing the polarity and passage of the rectifier voltage through zero and connected in parallel with the rectifier, an information link for linking the system components operating at different potentials, and an AND gate including two inputs one of which is connected to the output of said synchronizer and the other of which is connected to the output of said sensor of the polarity and passage of the rectifier voltage through zero, said gate including an output connected to the input of said control-pulse shaper-amplifier, while said feedback circuit enables narrow control pulses to be applied to the rectifier in the presence of a positive voltage across it at the beginning of its conduction interval and also at the subsequent instants when the rectifier voltage passes through zero from a negative to a positive value during the entire conduction interval of the rectifier.
Claim 5
Dependent Claim
61 words
A system, as claimed in claim 1, in which to transmit information about the instants when the rectifier voltage passes through zero from a negative to a positive value during the conduction interval of the rectifier the information link is arranged between the sensor of the passage of the rectifier voltage through zero and the second input of the AND gate.
Claim 6
Dependent Claim
39 words
A system, as claimed in claim 1, in which to transmit information about the onset and duration of conduction intervals of the rectifier the information link is arranged between the Synchronizer and the first input of the AND gate.
Claim 7
Dependent Claim
68 words
A system, as claimed in claim 1, comprising a pulse circuit and in which, when use is made of a source of narrow synchronizing pulses, said pulse circuit, which is coupled between the output of the synchronizer and the first input of the AND gate, transforms the narrow pulses of the synchronizer into broad pulses the duration of which is equal to the conduction interval of the rectifier.
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) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |