GB1529679A - Dc supply circuits - Google Patents
Dc supply circuitsInfo
- Publication number
- GB1529679A GB1529679A GB5533874A GB5533874A GB1529679A GB 1529679 A GB1529679 A GB 1529679A GB 5533874 A GB5533874 A GB 5533874A GB 5533874 A GB5533874 A GB 5533874A GB 1529679 A GB1529679 A GB 1529679A
- Authority
- GB
- United Kingdom
- Prior art keywords
- switching element
- diode
- transformer
- turned
- winding
- 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
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/081—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit
- H03K17/0814—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the output circuit
- H03K17/08146—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the output circuit in bipolar transistor switches
Landscapes
- Dc-Dc Converters (AREA)
Abstract
1529679 Transistor switching circuits SIMMS GROUP RESEARCH & DEVELOPMENT Ltd 8 Dec 1975 [21 Dec 1974] 55338/74 Heading H3T [Also in Division H2] A circuit for supplying power to a load 13 such as the field winding of a motor, comprises a switching element 14 connected in series with the load and a primary winding 17 of a transformer 16 across D.C. supply terminals 10, 11, the secondary winding 18 of the transformer being connected to the terminals via a diode 19 which conducts when the flux in the transformer core collapses. The circuit protects the switching element which may be a transistor and also minimizes power loss in the switching element. When the switching element is turned on, the voltage induced in the secondary winding reverse biases the diode 19 and the winding 17 therefore acts as a choke to limit the rate of increase of current. On turning off the switching element 14 the flux in the transformer core collapses and the diode 19 is forward biased to return energy to the supply. A capacitor 21 and a diode 22 are connected in parallel with the switching element 14, the capacitor being charged when the switching element is turned off and discharged through the primary winding 24 of a transformer 23 and a further switching element 27 when the switching elements are turned on. When the switching element 27 is turned off, the energy stored in the transformer core is returned to the supply via a diode 26.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5533874A GB1529679A (en) | 1974-12-21 | 1974-12-21 | Dc supply circuits |
| FR7538805A FR2295615A1 (en) | 1974-12-21 | 1975-12-18 | ELECTRICAL SUPPLY CIRCUIT, ESPECIALLY FOR THE EXCITATION COIL OF AN ELECTRIC MOTOR |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5533874A GB1529679A (en) | 1974-12-21 | 1974-12-21 | Dc supply circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1529679A true GB1529679A (en) | 1978-10-25 |
Family
ID=10473624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5533874A Expired GB1529679A (en) | 1974-12-21 | 1974-12-21 | Dc supply circuits |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR2295615A1 (en) |
| GB (1) | GB1529679A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0041769A1 (en) * | 1980-06-09 | 1981-12-16 | General Motors Corporation | Transistor chopper circuits |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2550399B1 (en) * | 1983-08-05 | 1989-07-07 | Cem Comp Electro Mec | SWITCHING ASSISTANCE DEVICE |
| FR2592748B1 (en) * | 1986-01-09 | 1992-08-28 | Celduc | IMPROVED BLOWING CIRCUIT FOR HIGH POWER SWITCHING BY A CONTROLLED STATIC SWITCH |
| FR2671922B1 (en) * | 1991-01-22 | 1994-02-11 | Agence Spatiale Europeenne | METHOD FOR REDUCING THE SWITCHING LOSSES CREATED BY A POWER SWITCH. |
| CN110212755B (en) * | 2019-06-25 | 2020-05-05 | 中国人民解放军军事科学院国防科技创新研究院 | Transmission line isolated form linear transformer driving source |
-
1974
- 1974-12-21 GB GB5533874A patent/GB1529679A/en not_active Expired
-
1975
- 1975-12-18 FR FR7538805A patent/FR2295615A1/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0041769A1 (en) * | 1980-06-09 | 1981-12-16 | General Motors Corporation | Transistor chopper circuits |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2295615B1 (en) | 1981-11-20 |
| FR2295615A1 (en) | 1976-07-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |