GB982539A - Improvements relating to d.c. supply filter circuit arrangements - Google Patents
Improvements relating to d.c. supply filter circuit arrangementsInfo
- Publication number
- GB982539A GB982539A GB678263A GB678263A GB982539A GB 982539 A GB982539 A GB 982539A GB 678263 A GB678263 A GB 678263A GB 678263 A GB678263 A GB 678263A GB 982539 A GB982539 A GB 982539A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- voltage
- thyristor
- gate
- diode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
982,539. Smoothing D.C. WESTING- HOUSE BRAKE & SIGNAL CO. Ltd. Jan. 24, 1964 [Feb. 20, 1963], No. 6782/63. Heading H2F. A direct current smoothing circuit comprising an inductor L and capacitor C includes controllable rectifier means shunting the inductor and rendered conductive by a sensing circuit on the occasion of a transient surge at the output terminals. As shown, a thyristor SOR1 shunts the inductor L and has a resistor R3 and Zener diode ZD1 in its gate-cathode circuit. The sensing circuit comprises a diode D2, resistor R1 and a parallel RC circuit R2, C1 in series across the output terminals, the junction of R1 and C1 being connected to the gate through R3. In operation, when the current I falls rapidly due to changing load conditions the current through L cannot change rapidly and current is diverted to the capacitor C causing an increase in output voltage. The capacitor C1 which has also charged to the normal peak voltage tends to follow the increase in voltage on overshoot; however, by virtue of the time constant or the circuit R1, C1, the rise of voltage on C1 is delayed. As a consequence a forward bias is applied to gate cathode circuit, firing the thyristor before the overshoot has risen by more than a few volts. A circulating current flows through L and SCR1, and the excess voltage is limited to the forward voltage drop across SCR1 which may be only a few volts. The Zener diode ZD1 and resistor R3 protect the thyristor on switching on. In modifications D2 and R1 may be omitted since a similar path exists through the gate-cathode circuit and R3; an additional diode may be connected in series with ZD1; a transistor amplifier may be used in the sensing circuit; and the thyristor may be replaced by a transistor and diode in series.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB678263A GB982539A (en) | 1963-02-20 | 1963-02-20 | Improvements relating to d.c. supply filter circuit arrangements |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB678263A GB982539A (en) | 1963-02-20 | 1963-02-20 | Improvements relating to d.c. supply filter circuit arrangements |
Publications (1)
Publication Number | Publication Date |
---|---|
GB982539A true GB982539A (en) | 1965-02-03 |
Family
ID=9820649
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB678263A Expired GB982539A (en) | 1963-02-20 | 1963-02-20 | Improvements relating to d.c. supply filter circuit arrangements |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB982539A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5075839A (en) * | 1990-04-05 | 1991-12-24 | General Electric Company | Inductor shunt, output voltage regulation system for a power supply |
US5119284A (en) * | 1990-04-05 | 1992-06-02 | General Electric Company | Efficient power supply post regulation |
RU2746260C1 (en) * | 2020-10-08 | 2021-04-12 | Илья Николаевич Джус | Capacitor battery-filter |
-
1963
- 1963-02-20 GB GB678263A patent/GB982539A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5075839A (en) * | 1990-04-05 | 1991-12-24 | General Electric Company | Inductor shunt, output voltage regulation system for a power supply |
US5119284A (en) * | 1990-04-05 | 1992-06-02 | General Electric Company | Efficient power supply post regulation |
RU2746260C1 (en) * | 2020-10-08 | 2021-04-12 | Илья Николаевич Джус | Capacitor battery-filter |
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