CN205265533U - DC -DC converter - Google Patents
DC -DC converter Download PDFInfo
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- CN205265533U CN205265533U CN201521127436.3U CN201521127436U CN205265533U CN 205265533 U CN205265533 U CN 205265533U CN 201521127436 U CN201521127436 U CN 201521127436U CN 205265533 U CN205265533 U CN 205265533U
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Abstract
An embodiment of the utility model provides a DC -DC converter, the power supply box comprises a transformer, the former limit and the high voltage power supply of transformer are connected, the vice limit and the load of transformer are connected, still include reactor and switch circuit, the former limit of transformer with be connected with between the high voltage power supply the reactor, the vice limit of transformer with be connected with between the load switch circuit, switch circuit will the vice limit output voltage of transformer makes into square wave voltage. Adopt the utility model provides a DC -DC converter, the prior art that compares has increased DC -DC converter's range of application.
Description
Technical field
The utility model relates to electric and electronic technical field, relates in particular to a kind of DC-DC converter.
Background technology
In DC-DC converter, generally use switching device to realize direct current by control inputs electric currentThe conversion of voltage. For boost converter, can enter input current by switching deviceRow is controlled.
Be subject to the restriction of dutycycle, the output voltage of boost converter generally can not exceed input electricityPress five times, meanwhile, be subject to the withstand voltage restriction of switching device, the input of DC-DC converterThe voltage of high voltage source is generally no more than 2000V.
Utility model content
The purpose of this utility model is, a kind of DC-DC converter is provided, with increase direct current-The range of application of DC converter.
The utility model embodiment provides a kind of DC-DC converter, comprises transformer, described changeThe former limit of depressor is connected with high voltage source, and the secondary of described transformer is connected with load, also comprises electricityAnti-device and on-off circuit, be connected with described electricity between the former limit of described transformer and described high voltage sourceAnti-device, is connected with described on-off circuit between the secondary of described transformer and described load, described in openClose circuit the secondary output voltage of described transformer is modulated into square-wave voltage.
Preferably, described DC-DC converter also comprises switching device, and described switching device connectsBetween the former limit and high voltage source of described transformer, described switching device is for working as described transformerPrimary current while exceeding current threshold, disconnect the former limit of described high voltage source and described transformerConnect.
Preferably, described on-off circuit comprises the first switch element and second switch unit, describedOne switch element is in parallel with described transformer secondary, and the input of described the first switch element withThe current output terminal of described transformer secondary connects, described second switch unit and described transformer pairLimit and described load series connection, described the first switch element is for exporting electricity by the secondary of described transformerPressure is modulated into square-wave voltage, and described second switch unit is for transformer secondary described in one-way conductionElectric current.
Alternatively, described the first switch element is switching device, and described second switch unit is two utmost pointsPipe, the positive pole of described diode is connected with the current output terminal of described transformer secondary.
Preferably, described the first switch element is switching device, and described second switch unit comprises outClose device and with the antiparallel diode of described switching device.
Alternatively, described switching device comprises IGBT, MOSFET, IGCT or GTO.
Preferably, described DC-DC converter also comprises electric capacity, and described electric capacity and described load are alsoConnection.
Alternatively, described switching device comprises breaker, relay or air switch.
Preferably, described switching device is connected between described reactor and described high voltage source.
Preferably, described transformer is high frequency transformer.
The DC-DC converter that the utility model embodiment provides, uses by the secondary of transformerThe voltage of on-off circuit control transformer secondary, formation high level is secondary voltage, low level isThe square wave of 0V, and this square-wave voltage is added on the reactor of transformer primary side, and transformer primary sideVoltage acting in conjunction, form the electric current on reactor, thus by controlled the energy of transformer primary sideBe input to the secondary of transformer, make DC-DC converter can not be subject to input high voltage sourceBe no more than the restriction of 2000V, the prior art of comparing, the application that has increased DC-DC converterScope.
Brief description of the drawings
Fig. 1 is the DC-DC converter electrical block diagram of the utility model embodiment mono-;
Fig. 2 is the DC-DC converter electrical block diagram of the utility model embodiment bis-;
Fig. 3 is the DC-DC converter electrical block diagram of the utility model embodiment tri-.
Description of reference numerals:
2-high voltage source; 3-load; 4-transformer; 5-reactor; 6-switching device; 7-first opensClose unit; 8-switching device; 9-diode; 10-on-off circuit; 11-electric capacity.
Detailed description of the invention
Below in conjunction with accompanying drawing, the DC-DC converter of exemplary embodiment of the present utility model is enteredRow is described in detail.
Embodiment mono-
Fig. 1 is the DC-DC converter electrical block diagram of the utility model embodiment mono-. AsShown in Fig. 1, the DC-DC converter that the utility model embodiment provides comprises transformer 4, becomesThe former limit of depressor 4 is connected with high voltage source 2, and the secondary of transformer 4 is connected with load 3, also bagDraw together reactor 5 and on-off circuit 10, between the former limit of transformer 4 and high voltage source 2, be connected with electricityAnti-device 5, is connected with on-off circuit 10 between the secondary of transformer 4 and load 3, on-off circuit 10The secondary output voltage of transformer 4 is modulated into square-wave voltage.
In Fig. 1, on-off circuit is made up of two switching devices with anti-paralleled diode,The switching device that this place is used is IGBT. Wherein, the work of the switching device in parallel with transformer secondaryWith being that the output voltage of secondary of control transformer is with the output current on the former limit of control transformer; Series connectionSwitching device between transformer secondary and load is all the time in off state, by with this derailing switchThe antiparallel diode of part is realized the one-way conduction of electric current. In one group of Same Name of Ends of transformer, be positioned at formerThe Same Name of Ends on limit is connected with the positive pole of high voltage source, and the Same Name of Ends that is positioned at secondary of transformer is electric currentOutflow end, therefore, in the time that the switching device in parallel with transformer secondary opened, electric current is from this derailing switchPart flows through, and when this switching device turn-offs, electric current is from being connected on opening between transformer secondary and loadPass device flows through, and now transformer secondary voltage is 0V.
Turning on and off of switching device by the parallel connection of control transformer secondary, transformer secondary is defeatedThe voltage going out is modulated into square-wave voltage, and the high level of this square-wave voltage is secondary voltage, low levelFor 0V.
In the utility model embodiment, switching device is IGBT, but in actual applications notBe confined to this, the type of operable switching device comprise IGBT, MOSFET, IGCT orGTO。
As shown in Figure 1, the DC-DC converter in the utility model embodiment also comprises electric capacity 11,Electric capacity 11 is in parallel with load 3. Load 3 shunt capacitances 4 can regulated output voltage.
Transformer 4 in the utility model embodiment is high frequency transformer.
The DC-DC converter that the utility model embodiment provides, uses by the secondary of transformerThe voltage of on-off circuit control transformer secondary, formation high level is secondary voltage, low level isThe square wave of 0V, and this square-wave voltage is added on the reactor of transformer primary side, and transformer primary sideVoltage acting in conjunction, form the electric current on reactor, thus by controlled the energy of transformer primary sideBe input to the secondary of transformer, make DC-DC converter can not be subject to input high voltage sourceBe no more than the restriction of 2000V, the prior art of comparing, the application that has increased DC-DC converterScope.
Embodiment bis-
As shown in Figure 2, on-off circuit comprises the first switch element 7 and second switch unit, wherein,The first switch element 7 can be switching device, second switch unit comprise switching device 8 and with openClose the antiparallel diode of device 8, the first switch element 7 is in parallel with transformer secondary, and theThe input of one switch element 7 is connected with the current output terminal of transformer 4 secondary, second switch listUnit connects with transformer 4 secondary and load 3, and the first switch element 7 is for by the pair of transformer 4Limit output voltage is modulated into square-wave voltage, and second switch unit is for one-way conduction transformer 4 secondaryElectric current.
In the utility model embodiment, switching device 8 is IGBT, in parallel with transformer secondaryThe effect of the first switch element 7 is that the output voltage of secondary of control transformer is former with control transformerThe output current on limit; Be connected on switching device 8 between transformer secondary and load all the time in closingDisconnected state, realizes the one-way conduction of electric current with the antiparallel diode of this switching device. TransformerIn one group of Same Name of Ends, be positioned at the Same Name of Ends on former limit and the positive pole of high voltage source is connected, being positioned at of transformerThe Same Name of Ends of secondary is outflow of bus current end. Therefore, when the first switch list in parallel with transformer secondaryWhen unit 7 opens, electric current flows through from the first switch element 7; When this first switch element 7 turn-offs,Electric current flows through from the switching device 8 being connected between transformer secondary and load, now transformer pairPolygonal voltage is 0V.
As shown in Figure 2, DC-DC converter also comprises switching device 6, and switching device 6 connectsBetween the former limit and high voltage source 2 of transformer 4, switching device 6 is for working as the former of transformer 4When limit electric current exceedes current threshold, disconnect being connected of former limit of high voltage source 2 and transformation 4 devices.
Switching device 6 can use breaker, relay or air switch. As shown in Figure 2, openClosing device 6 is connected between reactor 5 and high voltage source 2. The effect of switching device 6 is blocking-upEnergy transmits, when secondary-side switch circuit quits work or when energy transmission is lower, and transformer primary sideElectric current there will be out of control, is zero so make electric current by switching device.
In the utility model embodiment, switching device is IGBT, but in actual applications notBe confined to this, the type of operable switching device comprise IGBT, MOSFET, IGCT orGTO。
As shown in Figure 2, the DC-DC converter in the utility model embodiment also comprises electric capacity 11,Electric capacity 11 is in parallel with load 3.
Load 3 shunt capacitances 11 can regulated output voltage.
Transformer in the utility model embodiment is high frequency transformer.
Switching device can use breaker, relay or air switch.
The DC-DC converter that the utility model embodiment provides, uses by the secondary of transformerThe voltage of on-off circuit control transformer secondary, formation high level is secondary voltage, low level isThe square wave of 0V, and this square-wave voltage is added on the reactor of transformer primary side, and transformer primary sideVoltage acting in conjunction, form the electric current on reactor, thus by controlled the energy of transformer primary sideBe input to the secondary of transformer, make DC-DC converter can not be subject to input high voltage sourceBe no more than the restriction of 2000V, the prior art of comparing, the application that has increased DC-DC converterScope.
Embodiment tri-
As shown in Figure 3, on-off circuit comprises the first switch element 7 and second switch unit, firstSwitch element 7 is in parallel with transformer secondary, and the input of the first switch element 7 and transformerThe current output terminal of 4 secondary connects, and connects with transformer 4 secondary and load 3 in second switch unit,The first switch element 7 is for being modulated into square-wave voltage, second by the secondary output voltage of transformer 4Switch element is for the electric current of one-way conduction transformer 4 secondary.
As shown in Figure 3, the first switch element 7 is switching device, and second switch unit is diode9, the positive pole of diode is connected with the current output terminal of transformer secondary.
In Fig. 3, on-off circuit is by a switching device with anti-paralleled diode and one twoUtmost point pipe composition, the switching device using at this place is IGBT. Wherein, the effect of switching device is controlThe output voltage of the secondary of transformer processed is with the output current on the former limit of control transformer; Diode is realizedThe one-way conduction of electric current. In one group of Same Name of Ends of transformer, be positioned at Same Name of Ends and the high voltage source on former limitPositive pole connect, the Same Name of Ends that is positioned at secondary of transformer is outflow of bus current end, therefore works as derailing switchWhen part is opened, electric current flows through from this switching device, and when this switching device turn-offs, electric current is from diodeFlow through, now transformer secondary voltage is 0V.
In the utility model embodiment, switching device is IGBT, but in actual applications notBe confined to this, the type of operable switching device comprise IGBT, MOSFET, IGCT orGTO。
As shown in Figure 3, the DC-DC converter in the utility model embodiment also comprises electric capacity 11,Electric capacity 11 is in parallel with load 3.
Load 3 shunt capacitances 11 can regulated output voltage.
Transformer in the utility model embodiment is high frequency transformer.
Switching device can use breaker, relay or air switch.
The DC-DC converter that the utility model embodiment provides, uses by the secondary of transformerThe voltage of on-off circuit control transformer secondary, formation high level is secondary voltage, low level isThe square wave of 0V, and this square-wave voltage is added on the reactor of transformer primary side, and transformer primary sideVoltage acting in conjunction, form the electric current on reactor, thus by controlled the energy of transformer primary sideBe input to the secondary of transformer, make DC-DC converter can not be subject to input high voltage sourceBe no more than the restriction of 2000V, the prior art of comparing, the application that has increased DC-DC converterScope.
The above, be only detailed description of the invention of the present utility model, but protection of the present utility modelScope is not limited to this, and any those skilled in the art of being familiar with disclose at the utility modelTechnical scope in, can expect easily change or replace, all should be encompassed in protection of the present utility modelWithin scope. Therefore, protection domain of the present utility model should be with the protection domain of described claimBe as the criterion.
Claims (10)
1. a DC-DC converter, comprises transformer (4), described transformer (4)Former limit is connected with high voltage source (2), and the secondary of described transformer (4) is connected with load (3),It is characterized in that, also comprise reactor (5) and on-off circuit (10), described transformer (4)Former limit and described high voltage source (2) between be connected with described reactor (5), described transformer(4) between secondary and described load (3), be connected with described on-off circuit (10), described in openClose circuit (10) the secondary output voltage of described transformer (4) is modulated into square-wave voltage.
2. DC-DC converter according to claim 1, is characterized in that, also comprisesSwitching device (6), described switching device (6) is connected to the former limit of described transformer (4) with highBetween voltage source (2), described switching device (6) is for the former limit electricity when described transformer (4)When stream exceedes current threshold, disconnect the former limit of described high voltage source (2) and described transformer (4)Connection.
3. DC-DC converter according to claim 1, is characterized in that, described in openClose circuit and comprise the first switch element (7) and second switch unit, described the first switch element (7)In parallel with described transformer (4) secondary, and the input of described the first switch element (7) withThe current output terminal of described transformer (4) secondary connects, described second switch unit and described transformationDevice (4) secondary and described load (3) series connection, described the first switch element (7) is for described in generalThe secondary output voltage of transformer (4) is modulated into square-wave voltage, and described second switch unit is for singleTo the electric current of transformer described in conducting (4) secondary.
4. DC-DC converter according to claim 3, is characterized in that, describedOne switch element (7) is switching device, and described second switch unit is diode (9), described inThe positive pole of diode (9) is connected with the current output terminal of described transformer (4) secondary.
5. DC-DC converter according to claim 3, is characterized in that, describedOne switch element (7) is switching device, described second switch unit comprise switching device (8) andWith the antiparallel diode of described switching device (8).
6. according to the DC-DC converter described in claim 4 or 5, it is characterized in that instituteState switching device and comprise IGBT, MOSFET, IGCT or GTO.
7. DC-DC converter according to claim 1, is characterized in that, also comprisesElectric capacity (11), described electric capacity (11) is in parallel with described load (3).
8. DC-DC converter according to claim 2, is characterized in that, described in openClose device (6) and comprise breaker, relay or air switch.
9. DC-DC converter according to claim 2, is characterized in that, described in openClosing device (6) is connected between described reactor (5) and described high voltage source (2).
10. DC-DC converter according to claim 1, is characterized in that, described changeDepressor (4) is high frequency transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521127436.3U CN205265533U (en) | 2015-12-29 | 2015-12-29 | DC -DC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521127436.3U CN205265533U (en) | 2015-12-29 | 2015-12-29 | DC -DC converter |
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| Publication Number | Publication Date |
|---|---|
| CN205265533U true CN205265533U (en) | 2016-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521127436.3U Active CN205265533U (en) | 2015-12-29 | 2015-12-29 | DC -DC converter |
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| CN (1) | CN205265533U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471268A (en) * | 2015-12-29 | 2016-04-06 | 北京天诚同创电气有限公司 | DC-DC Converter |
| CN112152458A (en) * | 2019-06-28 | 2020-12-29 | 北京金风慧能技术有限公司 | Direct current isolation converter and control method and device thereof |
-
2015
- 2015-12-29 CN CN201521127436.3U patent/CN205265533U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471268A (en) * | 2015-12-29 | 2016-04-06 | 北京天诚同创电气有限公司 | DC-DC Converter |
| CN105471268B (en) * | 2015-12-29 | 2018-07-27 | 北京天诚同创电气有限公司 | DC-DC converter |
| CN112152458A (en) * | 2019-06-28 | 2020-12-29 | 北京金风慧能技术有限公司 | Direct current isolation converter and control method and device thereof |
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