CN2379968Y - Contravariant electric power device having passive, loss-free buffer circuit - Google Patents
Contravariant electric power device having passive, loss-free buffer circuit Download PDFInfo
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- CN2379968Y CN2379968Y CN 99213490 CN99213490U CN2379968Y CN 2379968 Y CN2379968 Y CN 2379968Y CN 99213490 CN99213490 CN 99213490 CN 99213490 U CN99213490 U CN 99213490U CN 2379968 Y CN2379968 Y CN 2379968Y
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- diode
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- inductance
- buffer circuit
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Abstract
The utility model relates to a power supply device transforming direct current into alternating current. A buffer circuit which realizes the opening and the closing of an inverter switch device is arranged in the power supply device, and the buffer circuit is the circuit which is composed of an inductor, a capacitor, and a diode. Because the power supply device of the utility model is not provided with not only a resistance element which consumes energy but also an auxiliary switch and a corresponding control circuit, the utility model has the advantages of simple structure, low cost, strong work reliability, and high efficiency.
Description
The utility model relates to the supply unit that direct current is transformed into alternating current.
The present supply unit that contains inverter bridge that DC converting is become to exchange that is using, the buffer circuit that realization turns on and off the converter bridge switching parts device has two kinds, a kind of is the passive buffer circuit that contains resistance, and its energy loss is big, and energy consumption becomes heat energy during work on resistance, cause the supply unit operating efficiency to descend, another kind is the active buffer circuit with assist control switch, though its non-resistance loss, the control circuit complexity, the supply unit cost is increased, and functional reliability is relatively poor.
In view of above-mentioned, the purpose of this utility model provide a kind of simple in structure, cost is low, reliable operation, the inverter power supply device that contains passive loss-free buffer circuit that efficient is high.
The inverter power supply device that contains passive loss-free buffer circuit that the utility model provides comprises the inverter bridge with switching device and fly-wheel diode formation, realization turns on and off the buffer circuit of converter bridge switching parts device, buffer circuit comprises inductance L s, capacitor C o, quantity identical with brachium pontis quantity on the inverter bridge by diode Dc, Ds and capacitor C s one end connect the T type circuit of formation and the circuit that is in series by diode Do and inductance L o altogether, the end of inductance L s and capacitor C o altogether with inverter bridge wherein the fly-wheel diode of a brachium pontis link to each other, the other end of inductance L s links to each other with the diode Dc end of T type circuit, the other end of capacitor C o links to each other with the diode Ds end of T type circuit, on the capacitor C s and inverter bridge of T type circuit, the contact of following brachium pontis links to each other, one of diode Do and inductance L o series circuit is terminated on the contact of capacitor C o and diode Ds, and the other end links to each other with the fly-wheel diode of another brachium pontis of inverter bridge.When work like this, the switching device buffering of utilizing capacitance voltage not suddenly change can to make inverter bridge is turn-offed, utilize inductive current not suddenly change and can make converter bridge switching parts device buffering open-minded, and by electric capacity, inductance with power conversion to load or power supply.
The inverter power supply device that contains passive loss-free buffer circuit of the present utility model had not both had the resistive element of power consumption, did not have auxiliary switch and corresponding auxiliary switch control circuit yet, so it is not only simple in structure, cost is low, and functional reliability is strong, efficient is high.
Below in conjunction with accompanying drawing the utility model is described in detail:
Fig. 1 is a kind of formation example of the utility model supply unit;
Fig. 2 is another example of the utility model supply unit;
Fig. 3 is the another example of the utility model supply unit;
With reference to Fig. 1, the inverter bridge that among the figure direct current of importing is transformed into alternating current is by switching element T 1, T2, sustained diode 1, the semi-bridge inversion bridge that D2 constitutes, the buffer circuit that realization turns on and off the converter bridge switching parts device comprises inductance L s, capacitor C o, by diode Dc, Ds and capacitor C s one end connect the T type circuit of formation and the circuit that is in series by diode Do and inductance L o altogether, the end of inductance L s and capacitor C o links to each other with the negative pole of brachium pontis sustained diode 1 on the inverter bridge altogether, the other end of inductance L s links to each other with the diode Dc end of T type circuit, the other end of capacitor C o links to each other with the diode Ds end of T type circuit, on the capacitor C s and inverter bridge of T type circuit, the contact A of following brachium pontis links to each other, one of diode Do and inductance L o series circuit is terminated on the contact of capacitor C o and diode Ds, and the positive pole of brachium pontis sustained diode 2 links to each other under the other end and the inverter bridge.
Below in conjunction with the description of drawings operation principle:
One, supposes that load current Im flows out node A
1.T1 turn off process
T1 turn-offs after pulse is added to gate pole, and its sense of current is from power supply → Ls → Co → Ds → Cs → Im, because the voltage of capacitor C o and Cs can not suddenly change, but from U
Co+ U
Cs=0 begins charging so the voltage U of T1
T1The rising of starting from scratch realizes that T1 turn-offs cushioning effect, when the voltage of T1 equals supply voltage U
T1=U
dThe time, the D2 conducting, load current flows through D2, and energy is transferred among the Co at last among the Ls, finishes the T1 turn off process.
2.T1 opening process
When opening after pulse is added to the T1 gate pole supply voltage U
dBe added on the Ls, electric current is linear among the T1 rises, and electric current is linear among the D2 descends.Simultaneously, capacitor C o is by T1, D2, D
o, L
oDischarge releases energy, when the electric current of T1 equals load current I
T1During=Im, D2 blocking-up, L at this moment
oMiddle energy is transferred to load through Co, T1.Simultaneously, capacitor C s reaches U at last through Dc, Ls, T1 discharge
Co+ U
Cs=0.This moment the T1 voltage U
T1=0, finish the T1 opening process like this.
Two, assumed load electric current I m flows into node A
1.T2 turn off process
When turn-offing after pulse is added to the T2 gate pole, load current flows to from Cs, Dc to power supply, and loopback Cs energy is to power supply, afterwards, electric current again through Co, Dc to power supply, realize that shutoff cushions.When T2 voltage during greater than supply voltage, load current begins to flow to D1, Ls to power supply.After Im flowed to D1 fully, the T2 turn off process was finished.
2.T2 opening process.
When opening after pulse is added to the T2 gate pole supply voltage U
dAll be added to inductance L s, make the T2 electric current I
T2The linear rising, simultaneously, capacitor C o is through D1, T2, D
o, L
oDischarge.Work as I
T2During=Im, D1 disconnects, and capacitor C o is again through load, and Do, Lo discharge is shifted energy to load, and after energy was transmitted back to Cs and Co among the last Lo, the T2 opening process was finished.
Inverter bridge in the supply unit shown in Figure 2 also is by switching element T 1, T2, the semi-bridge inversion bridge that sustained diode 1, D2 constitute, buffer circuit comprises inductance L s, capacitor C o equally, connects T type circuit that constitutes and the circuit that is in series by diode Do and inductance L o altogether by diode Dc, Ds and capacitor C s one end, in this example, the end of inductance L s and capacitor C o connects the positive pole of brachium pontis sustained diode 2 under the inverter bridge altogether, and diode Do is to link to each other with the negative pole of last brachium pontis sustained diode 1 with a wherein end of inductance L o series circuit.This example switching element T 1, T2 to turn on and off the same example of operation principle in full accord.
The inverter bridge of supply unit shown in Figure 3 is by switching element T 1～T4, the single-phase full bridge inverter bridge that sustained diode 1～D4 constitutes, its buffer circuit comprises inductance L s, capacitor C o, identical by brachium pontis quantity on the series circuit of diode Do and inductance L o and quantity and the inverter bridge, i.e. two T type circuit, one of them T type circuit is by diode Dc1, Ds1, capacitor C s1 one end connects formation altogether, and another T type circuit is by diode Dc2, Ds2, and capacitor C s2 one end connects formation altogether.The end of inductance L s and capacitor C o links to each other with the negative pole of brachium pontis fly-wheel diode on the inverter bridge altogether, the other end of inductance L s links to each other with diode Dc1, the Dc2 end of two T type circuit, the other end of capacitor C o links to each other with diode Ds1, the Ds2 end of two T type circuit, capacitor C s1, the Cs2 of two T type circuit all links to each other respectively with the contact of upper and lower brachium pontis, one of diode Do and inductance L o series circuit is terminated on the contact of capacitor C o and diode Ds1, and the positive pole of brachium pontis fly-wheel diode links to each other under the other end and the inverter bridge.
Claims (1)
1. inverter power supply device that contains passive loss-free buffer circuit, comprise inverter bridge with switching device and fly-wheel diode formation, realization turns on and off the buffer circuit of converter bridge switching parts device, it is characterized in that buffer circuit comprises inductance L s, capacitor C o, quantity identical with brachium pontis quantity on the inverter bridge by diode Dc, Ds and capacitor C s one end connect the T type circuit of formation and the circuit that is in series by diode Do and inductance L o altogether, the end of inductance L s and capacitor C o altogether with inverter bridge wherein the fly-wheel diode of a brachium pontis link to each other, the other end of inductance L s links to each other with the diode Dc end of T type circuit, the other end of capacitor C o links to each other with the diode Ds end of T type circuit, on the capacitor C s and inverter bridge of T type circuit, the contact of following brachium pontis links to each other, one of diode Do and inductance L o series circuit is terminated on the contact of capacitor C o and diode Ds, and the other end links to each other with the fly-wheel diode of another brachium pontis of inverter bridge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99213490 CN2379968Y (en) | 1999-06-23 | 1999-06-23 | Contravariant electric power device having passive, loss-free buffer circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99213490 CN2379968Y (en) | 1999-06-23 | 1999-06-23 | Contravariant electric power device having passive, loss-free buffer circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2379968Y true CN2379968Y (en) | 2000-05-24 |
Family
ID=34005885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99213490 Expired - Fee Related CN2379968Y (en) | 1999-06-23 | 1999-06-23 | Contravariant electric power device having passive, loss-free buffer circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2379968Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101005243B (en) * | 2006-05-01 | 2010-05-26 | 燕山大学 | Flexible bridge arm topological circuit |
-
1999
- 1999-06-23 CN CN 99213490 patent/CN2379968Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101005243B (en) * | 2006-05-01 | 2010-05-26 | 燕山大学 | Flexible bridge arm topological circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |