US3742333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
D-c voltage control with adjustable pulse width and repetition rate
Assignee: SILICON POWER CUBE Corp
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Filing: 1971-05-13
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Granted: 1973-06-26
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Expires: 1991-05-13
Abstract
Abstract A d-c voltage control circuit provides a controlled rectifier in series with a motor and battery and provides gating pulses to fire the controlled rectifier at an adjustable pulse repetition rate. A turn-off circuit for turning off the controlled rectifier is adjustable independently of the pulse repetition rate adjustment to adjust the length of time the controlled rectifier conducts after firing.
Inventors
- 👤 J Yurick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:55
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/02; H02M3/04; H02M3/10; H02M3/125; H02M3/135; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P7/29
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
338 words
A d-c voltage control circuit comprising, in combination: first, second and third controlled rectifiers each having main electrodes, and a control electrode; a source of d-c voltage, and means for connecting said first controlled rectifier main electrodes and said source of d-c voltage in series with one another and in series with a load; a commutating capacitor; said commutating capacitor connected in closed series connection with said main electrodes of said first and second controlled rectifiers, respectively, whereby the conduction of said second controlled rectifier permits the discharge of said capacitor through said first controlled rectifier in a direction to extinguish current flow in said first controlled rectifier; said main electrodes of said third controlled rectifier connected in closed series relation with said source of d-c voltage and said main electrodes of said first controlled rectifier, whereby conduction of said first and third controlled rectifiers causes charging of said capacitor from said source of d-c voltage; said main electrodes of said third controlled rectifier being further connected in closed series relation with said main electrodes of said second controlled rectifier and said source of d-c voltage; first firing circuit means connected to said control electrodes of said first and third controlled rectifiers for applying firing pulses thereto having a predetermined repetition rate; and second firing circuit means connected to said control electrode of said second controlled rectifier for applying firing pulses thereto a predetermined time after the firing of said first and third controlled rectifiers; said load comprising a d-c load; said d-c load being connected in a closed series relation which includes only said commutating capacitor and said main electrodes of said third controlled rectifier; and synchronizing circuit means connected between said first anD second firing circuit means for insuring the presence of a firing pulse from said second firing circuit means a predetermined time after the production of a pulse by said first firing circuit means; said synchronizing circuit means including said commutating capacitor as a source of operating voltage for said second firing circuit means.
Claim 2
Dependent Claim
338 words
A d-c voltage control circuit comprising, in combination: first, second and third controlled rectifiers each having main electrodes, and a control electrode; a source of d-c voltage, and means for connecting said first controlled rectifier main electrodes and said source of d-c voltage in series with one another and in series with a load; a commutating capacitor; said commutating capacitor connected in closed series connection with said main electrodes of said first and second controlled rectifiers, respectively, whereby the conduction of said second controlled rectifier permits the discharge of said capacitor through said first controlled rectifier in a direction to extinguish current flow in said first controlled rectifier; said main electrodes of said third controlled rectifier connected in closed series relation with said source of d-c voltage and said main electrodes of said first controlled rectifier, whereby conduction of said first and third controlled rectifiers causes charging of said capacitor from said source of d-c voltage; said main electrodes of said third controlled rectifier being further connected in closed series relation with said main electrodes of said second controlled rectifier and said source of d-c voltage; first firing circuit means connected to said control electrodes of said first and third controlled rectifiers for applying firing pulses thereto having a predetermined repetition rate; and second firing circuit means connected to said control electrode of said second controlled rectifier for applying firing pulses thereto a predetermined time after the firing of said first and third controlled rectifiers; said load comprising a d-c load; said d-c load being connected in a closed series relation which includes only said commutating capacitor and said main electrodes of said third controlled rectifier; and synchronizing circuit means connected between said first anD second firing circuit means for insuring the presence of a firing pulse from said second firing circuit means a predetermined time after the production of a pulse by said first firing circuit means; said synchronizing circuit means including said commutating capacitor as a source of operating voltage for said second firing circuit means.
Claim 3
Dependent Claim
33 words
The control circuit of claim 1 which includes first and second independent adjustment means for said first and second firing circuits, respectively, for independently adjusting the rate of production of firing pulses thereby.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |