CN203658890U - Contactless chopped voltage reduction circuit - Google Patents
Contactless chopped voltage reduction circuit Download PDFInfo
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- CN203658890U CN203658890U CN201420016721.7U CN201420016721U CN203658890U CN 203658890 U CN203658890 U CN 203658890U CN 201420016721 U CN201420016721 U CN 201420016721U CN 203658890 U CN203658890 U CN 203658890U
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- igbt2
- igbt3
- igbt4
- collector
- compensator transformer
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Abstract
A contactless chopped voltage reduction circuit comprises a compensation transformer T1, four insulated gate bipolar transistors (IGBT) modules, an inductor L1 and a capacitor C1. An input voltage live wire L is connected with one end of the secondary side of the compensation transformer T1, the other end of the secondary side of the compensation transformer T1 is connected with a collector of an IGBT1 module and connected with an output live wire terminal, emitters of the IGBT1 module and an IGBT2 module are connected in series in the opposite direction, a collector of the IGBT2 is connected with the inductor L1 and a collector of an IGBT4, the other end of the inductor L1 is connected with one end of the primary side of the compensation transformer T1 and one end of the capacitor C1, the other end of the primary side of the compensation transformer T1 and the other end of the capacitor C1 are both connected with a zero wire N, emitters of the IGBT4 and an IGBT3 are connected in series in the opposite direction, and a collector of the IGBT3 is connected with the zero wire N.
Description
Technical field
The utility model relates to a kind of reduction voltage circuit, refers in particular to a kind of circuit that utilizes contactless wave chopping technology to realize ac buck.
Background technology
Most of consumer all need to normally be worked under the voltage of an appointment, but in the higher occasion of some voltages, just need to carry out step-down processing to existing voltage, the simplest step-down mode adopts pressure regulator to realize step-down in the market, it mainly adopts carbon brush to regulate on transformer, when the weak point of this step-down mode is carbon brush long-term work, has certain mechanical wear, need periodic maintenance, and have certain failure rate of machinery; Adopt in addition relay switch mode, the weak point of this mode is that output voltage is discontinuous, and precision is not high, can not reach the object of high-precision voltage stabilizing output, also has the situation of relay contact wearing and tearing simultaneously.Particularly, in some inflammable and explosive occasions, as refuelling station etc., having the regulative mode of contact,, there is certain personal safety as well as the property safety hidden danger in the initiation fire of easily striking sparks.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, and a kind of contactless reduction voltage circuit is provided, and it adopts copped wave control technology to adjust bucking voltage value, has realized high-precision output voltage.
For achieving the above object, the utility model is achieved by the following technical solution: input voltage live wire L connects one end of compensator transformer T1 secondary, the collector of the other end connection module IGBT1 of compensator transformer T1 secondary, and connect output fire line terminal, the emitter of module I GBT1 and IGBT2 is connected in opposite directions, the collector output of IGBT2 connects the collector of inductance L 1 and IGBT4, the one end on another former limit of termination compensator transformer T1 of inductance L 1 and one end of capacitor C 1, the equal connecting to neutral line of the other end N of the other end on the former limit of compensator transformer T1 and C1, the emitter of IGBT4 and IGBT3 is connected in opposite directions, the collector connecting to neutral line N of IGBT3.
Because the Same Name of Ends of compensator transformer T1 two windings is not in the same side, when IGBT1 and IGBT2 open, realize the counterbonification of compensator transformer T1 bucking voltage, Δ U and input voltage Ui are reverse, output voltage U o=Ui-Δ U.In the time there is fluctuation in input voltage, by controlling the ON time of 4 IGBT, carry out the original edge voltage of control and compensation transformer T1, change the magnitude of voltage of compensator transformer T1 secondary voltage Δ U, realize output voltage stabilization at required magnitude of voltage.The conducting of IGBT1 and IGBT2 or cut-off duty are identical, and IGBT3 is identical with the duty of IGBT4 conducting or cut-off; And in the situation of IGBT1 and IGBT2 conducting, IGBT3 and IGBT4 cut-off; In the situation of IGBT1 and IGBT2 cut-off, IGBT3 and IGBT4 conducting.
Accompanying drawing explanation
Fig. 1 is the major loop schematic diagram of the present embodiment.
Embodiment
Below in conjunction with embodiment and accompanying drawing thereof, the utility model is remake to description.
Referring to Fig. 1, contactless chopped mode reduction voltage circuit, mainly comprise a compensator transformer T1, 4 IGBT modules, inductance L 1 and capacitor C 1, input voltage live wire L connects one end of compensator transformer T1 secondary, the collector of the other end connection module IGBT1 of compensator transformer T1 secondary, and connect output fire line terminal, the emitter of module I GBT1 and IGBT2 is connected in opposite directions, the collector output of IGBT2 connects the collector of inductance L 1 and IGBT4, the one end on another former limit of termination compensator transformer T1 of inductance L 1 and one end of capacitor C 1, the equal connecting to neutral line of the other end N of the other end on the former limit of compensator transformer T1 and C1, the emitter of IGBT4 and IGBT3 is connected in opposite directions, the collector connecting to neutral line N of IGBT3.
Principle of work: higher when larger when input voltage, increase the closing time of controlling ON time increase, IGBT3 and the IGBT4 of IGBT1 and IGBT2, and the time of compensator transformer T1 compensation work increases, and realizes larger Contrary compensation voltage; Higher hour when input voltage, reduce the closing time of controlling ON time minimizing, IGBT3 and the IGBT4 of IGBT1 and IGBT2, and the time decreased of compensator transformer T1 compensation work, realizes less Contrary compensation voltage; In the time that input voltage is normal, control the conducting of cut-off, IGBT3 and the IGBT4 of IGBT1 and IGBT2, compensator transformer T1 uncompensation voltage, direct voltage output.
Claims (3)
1. contactless chopped mode reduction voltage circuit, it comprises compensator transformer T1, 4 IGBT modules, inductance L 1 and capacitor C 1, it is characterized in that: input voltage live wire L connects one end of compensator transformer T1 secondary, the collector of the other end connection module IGBT1 of compensator transformer T1 secondary, and connect output fire line terminal, the emitter of module I GBT1 and IGBT2 is connected in opposite directions, the collector output of IGBT2 connects the collector of inductance L 1 and IGBT4, the one end on another former limit of termination compensator transformer T1 of inductance L 1 and one end of capacitor C 1, the equal connecting to neutral line of the other end N of the other end on the former limit of compensator transformer T1 and C1, the emitter of IGBT4 and IGBT3 is connected in opposite directions, the collector connecting to neutral line N of IGBT3.
2. contactless chopped mode reduction voltage circuit according to claim 1, is characterized in that: the Same Name of Ends of compensator transformer T1 two windings is not in the same side.
3. contactless chopped mode reduction voltage circuit according to claim 1, is characterized in that: the conducting of IGBT1 and IGBT2 or cut-off duty are identical, and IGBT3 is identical with the duty of IGBT4 conducting or cut-off; And in the situation of IGBT1 and IGBT2 conducting, IGBT3 and IGBT4 cut-off; In the situation of IGBT1 and IGBT2 cut-off, IGBT3 and IGBT4 conducting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420016721.7U CN203658890U (en) | 2014-01-09 | 2014-01-09 | Contactless chopped voltage reduction circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420016721.7U CN203658890U (en) | 2014-01-09 | 2014-01-09 | Contactless chopped voltage reduction circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203658890U true CN203658890U (en) | 2014-06-18 |
Family
ID=50925263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420016721.7U Expired - Fee Related CN203658890U (en) | 2014-01-09 | 2014-01-09 | Contactless chopped voltage reduction circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203658890U (en) |
-
2014
- 2014-01-09 CN CN201420016721.7U patent/CN203658890U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Contactless chopped voltage reduction circuit Effective date of registration: 20140924 Granted publication date: 20140618 Pledgee: Agricultural Bank of China, Limited by Share Ltd, Yueqing branch Pledgor: Sako Power Technology Corporation Registration number: 2014980000080 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20160912 Granted publication date: 20140618 |
|
| RINS | Preservation of patent right or utility model and its discharge | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140618 Termination date: 20160109 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20170312 Granted publication date: 20140618 |
|
| PD01 | Discharge of preservation of patent |