CN215420103U - O-Z source Boost converter - Google Patents
O-Z source Boost converter Download PDFInfo
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- CN215420103U CN215420103U CN202121408685.5U CN202121408685U CN215420103U CN 215420103 U CN215420103 U CN 215420103U CN 202121408685 U CN202121408685 U CN 202121408685U CN 215420103 U CN215420103 U CN 215420103U
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- 239000003990 capacitor Substances 0.000 claims abstract description 43
- 230000008878 coupling Effects 0.000 claims abstract description 18
- 238000010168 coupling process Methods 0.000 claims abstract description 18
- 238000005859 coupling reaction Methods 0.000 claims abstract description 18
- 238000010586 diagram Methods 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model provides an O-Z source Boost converter, which comprises a direct-current power supply Vin, an O-Z source network, a switching tube S, a diode D2, a capacitor C2 and a load R, wherein the O-Z source network comprises a coupling inductance coil, a diode D1 and a capacitor C1, and the coupling inductance coil is provided with an N1 side coil and an N2 side coil which are coupled by a magnetic core; the direct-current power Vin, the O-Z source network and the switching tube S are connected in series, the switching tube S is connected with the capacitor C2 and the diode D2 in series, and the load R is connected with the capacitor C2 in parallel; the anodes of the diode D1 and the capacitor C1 are both connected with the anode of the direct-current power Vin, and the cathode of the diode D1 is connected with the dotted terminal of the coil at the N1 side; the cathode of the capacitor C1 is connected with the end with the same name of the coil at the N2 side, and the coupling inductance coil is connected with the drain electrode of the switch tube S. The converter in the application is additionally provided with an O-Z source network on the basis of the traditional Boost converter, so that the Boost capacity is improved.
Description
Technical Field
The utility model relates to the technical field of power electronics, in particular to an O-Z source Boost converter.
Background
The traditional Boost circuit can simply realize the functions of boosting and reducing voltage, but the boosting ratio is 1/(1-D), and D is the duty ratio of the conduction of the switching tube S. If a large boost factor is needed, for example, if the boost factor is greater than 5, D is greater than 0.8, so that the on-time of the switch is too long and the off-time of the switch is too short, which results in too large loss and temperature rise, and affects practicality. Therefore, the O-Z source Boost converter provided by the utility model can effectively solve the problems and can realize a larger Boost function when D is smaller.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an O-Z source Boost converter, which effectively shortens the conduction time of a switching tube S, is beneficial to heat dissipation, has stronger boosting capacity, reduces used circuit elements, reduces cost, forms a protection circuit and provides higher working efficiency.
In order to achieve the purpose, the utility model provides an O-Z source Boost converter, which comprises a direct current power supply Vin, an O-Z source network, a switching tube S, a diode D2, a capacitor C2 and a load R:
the direct-current power supply Vin serves as a power supply and is provided with a positive electrode and a negative electrode;
one end of the O-Z source network is connected with the anode of the direct current power supply Vin, and the other end of the O-Z source network is connected with the cathode of the direct current power supply Vin through the switch tube S;
the switch tube S is used as a disconnection switch and is provided with a drain electrode and a source electrode, the drain electrode of the switch tube S is connected with the O-Z source network, and the source electrode of the switch tube S is connected with the negative electrode of the direct-current power source Vin;
the diode D2 has an anode and a cathode, and the anode of the diode D2 is connected with the drain of the switch tube S;
the capacitor C2 has an anode and a cathode, the anode of the capacitor C2 is connected with the cathode of the diode D2, and the cathode of the capacitor C2 is connected with the source of the switch tube S;
the load R is connected with the capacitor C2 in parallel;
specifically, the O-Z source network includes a coupling inductor, a diode D1, and a capacitor C1, wherein:
the coupling inductance coil is provided with an N1 side coil and an N2 side coil which are coupled through a magnetic core, and the coupling inductance coil is connected with the drain electrode of the switching tube S;
the diode D1 has an anode and a cathode, the anode of the diode D1 is connected to the anode of the dc power Vin, and the cathode of the diode D1 is connected to the dotted terminal of the N1 side coil;
the capacitor C1 has an anode and a cathode, the anode of the capacitor C1 is connected to the positive electrode of the dc power Vin, and the cathode of the capacitor C1 is connected to the dotted terminal of the N2 side coil.
Further, in the O-Z source Boost converter, when the switching tube S is turned on, the voltage across the coil on the N1 side is higher than the voltage of the dc power Vin, the diode D1 is turned off in the reverse direction, that is, the diode D1 prohibits current from flowing in the reverse direction, at this time, the dc power Vin, the capacitor C1, the coil on the N2 side and the switching tube S form a loop, the O-Z source network stores charge energy through the capacitor C1, and the capacitor C2 supplies energy to the load R; when the switch tube S is turned off, the capacitor C2 is charged by the dc power Vin and the O-Z source network together, and the load R is supplied with energy by the dc power Vin and the O-Z source network together.
Further, in the O-Z source Boost converter, the number of turns of the N1 side coil is greater than that of the N2 side coil.
Further, in the O-Z source Boost converter, the gain of the converter is 1/(1-AD); wherein: d is the on duty ratio of the switching tube S, and A is the turn ratio of the coil at the N1 side to the coil at the N2 side.
Compared with the prior art, the utility model has the following beneficial effects: when the switch tube S is conducted, the voltage of the two ends of the coil at the N1 side suddenly changes and exceeds the power supply voltage, so that the diode D1 is reversely cut off, the fault current can be automatically cut off, the response is quick, the peak value of the fault current is limited to a lower level, and the impact of a short-circuit fault on the power supply side is effectively isolated. Under the fault state of the transformer, the current of the working mode of the coupling inductance coil can not cause magnetic saturation, so that the volume of the coupling inductance coil is also obviously reduced; in addition, compared with the traditional Boost converter, the O-Z source Boost converter has the advantages that the conduction time of the switching tube S is shortened, the heat dissipation is facilitated, and the boosting capacity is stronger. Meanwhile, compared with the Z source network, the O-Z source network uses fewer circuit elements, reduces the cost, forms a protection circuit and provides higher working efficiency.
Drawings
FIG. 1 is a diagram of the main topology of the O-Z source Boost converter of the present invention;
FIG. 2 is a diagram of the topology of the O-Z source network of the present invention;
FIG. 3 is a graph of a simulation output voltage waveform of an O-Z source Boost converter based on a simulink platform according to the present invention;
FIG. 4 is an equivalent circuit diagram of the O-Z source Boost converter in the conducting state of the switching tube S;
fig. 5 is an equivalent circuit diagram of the O-Z source Boost converter in the off state of the switching tube S according to the present invention.
Detailed Description
The O-Z source Boost converter of the present invention will now be described in more detail with reference to the schematic drawing, in which preferred embodiments of the present invention are shown, it being understood that one skilled in the art may modify the utility model described herein while still achieving the advantageous effects of the utility model. Accordingly, the following description should be construed as broadly as possible to those skilled in the art and not as limiting the utility model.
The utility model is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
As shown in fig. 1, the present invention provides an O-Z source Boost converter 100, which includes a dc power Vin 10, an O-Z source network 20, a switching tube S30, a diode D240, a capacitor C250, and a load R60, where the dc power Vin 10, the O-Z source network 20, and the switching tube S30 are sequentially connected in series, that is, one end of the O-Z source network 20 is connected to an anode of the dc power Vin 10, the other end of the O-Z source network 20 is connected to a cathode of the dc power Vin 10 through the switching tube S30, a drain of the switching tube S30 is connected to the O-Z source network 20, and a source of the switching tube S30 is connected to a cathode of the dc power Vin 10. The anode of the diode D240 is connected to the drain of the switch tube S30, the anode of the capacitor C250 is connected to the cathode of the diode D240, the cathode of the capacitor C250 is connected to the source of the switch tube S30, and the load R60 is connected in parallel to the capacitor C250.
Specifically, as shown in fig. 1 and 2, O-Z source network 20 includes a coupling inductor 22, a diode D121, and a capacitor C123, coupling inductor 22 having an N1 side winding 221 and an N2 side winding 222 coupled by a magnetic core. The coupling inductance coil 22 is connected with the drain of the switch tube S30, the anode of the diode D121 is connected with the anode of the dc power Vin 10, the cathode of the diode D121 is connected with the dotted terminal of the N1 side coil 221, the anode of the capacitor C123 is connected with the anode of the dc power Vin 10, and the cathode of the capacitor C123 is connected with the dotted terminal of the N2 side coil 222.
In the present embodiment, the operation of the O-Z source Boost converter 100 is as follows:
as shown in fig. 4, when the switching tube S30 is turned on, the voltage across the coil 221 on the side of N1 is higher than the voltage of the dc power Vin 10, and the diode D121 turns off in the reverse direction, i.e., the diode D121 prohibits the current from flowing in the reverse direction, thereby forming an open circuit. At this time, the dc power Vin 10, the capacitor C123, the N2 side coil 222 and the switching tube S30 form a loop, the dc power Vin 10 transmits energy to the O-Z source network 20, that is, the O-Z source network 20 stores charge energy through the capacitor C123, and the capacitor C250 provides energy to the load R60;
as shown in FIG. 5, when the switch S30 is turned off, the capacitor C250 is charged by the DC power source Vin 10 and the O-Z source network 20, and the load R60 is supplied with energy by the DC power source Vin 10 and the O-Z source network 20.
Further, in the O-Z source Boost converter, the number of turns of the N1 side coil 221 is greater than that of the N2 side coil 222, and the larger the turn ratio, the stronger the boosting capability.
Further, in the O-Z source Boost converter, the gain of the converter 100 is 1/(1-AD); wherein: d is the on duty ratio of the switching tube S30, and a is the turn ratio of the N1 side coil 221 to the N2 side coil 222.
In the present embodiment, the O-Z source Boost converter 100 of the present invention is tested based on a simulink platform, and as shown in fig. 3, a voltage waveform output after a 100V dc voltage is boosted by the O-Z source Boost converter 100 is formed, where the dc power source Vin 10 provides the 100V dc voltage, the N1 side coil 221 in the coupling inductor 22 is 1000 μ H, the N2 side coil 222 is 250 μ H, the mutual inductance of the coupling inductor 22 is 495 μ H, and the duty ratio of the switching tube S30 is set to 0.25.
From the above experiments, under the same duty ratio, the Boost effect of the O-Z source Boost converter 100 provided by the utility model is better.
In summary, in the O-Z source Boost converter provided in this embodiment, when the switching tube S is turned on, the voltage across the coil on the N1 side suddenly changes and exceeds the power supply voltage, so that the diode D1 is turned off in the reverse direction, and therefore, the fault current can be automatically cut off, the response is fast, the peak value of the fault current is limited to a low level, and the impact of the short-circuit fault on the power supply side is effectively isolated. Under the fault state of the transformer, the current of the working mode of the coupling inductance coil can not cause magnetic saturation, so that the volume of the coupling inductance coil is also obviously reduced; in addition, compared with the traditional Boost converter, the O-Z source Boost converter has the advantages that the conduction time of the switching tube S is shortened, the heat dissipation is facilitated, and the boosting capacity is stronger. Meanwhile, compared with the Z source network, the O-Z source network uses fewer circuit elements, reduces the cost, forms a protection circuit and provides higher working efficiency.
The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (4)
1. An O-Z source Boost converter is characterized in that the converter comprises a direct current power Vin, an O-Z source network, a switching tube S, a diode D2, a capacitor C2 and a load R:
the direct-current power supply Vin serves as a power supply and is provided with a positive electrode and a negative electrode;
one end of the O-Z source network is connected with the anode of the direct current power supply Vin, and the other end of the O-Z source network is connected with the cathode of the direct current power supply Vin through the switch tube S;
the switch tube S is used as a disconnection switch and is provided with a drain electrode and a source electrode, the drain electrode of the switch tube S is connected with the O-Z source network, and the source electrode of the switch tube S is connected with the negative electrode of the direct-current power source Vin;
the diode D2 has an anode and a cathode, and the anode of the diode D2 is connected with the drain of the switch tube S;
the capacitor C2 has an anode and a cathode, the anode of the capacitor C2 is connected with the cathode of the diode D2, and the cathode of the capacitor C2 is connected with the source of the switch tube S;
the load R is connected with the capacitor C2 in parallel;
specifically, the O-Z source network includes a coupling inductor, a diode D1, and a capacitor C1, wherein:
the coupling inductance coil is provided with an N1 side coil and an N2 side coil which are coupled through a magnetic core, and the coupling inductance coil is connected with the drain electrode of the switching tube S;
the diode D1 has an anode and a cathode, the anode of the diode D1 is connected to the anode of the DC power Vin, and the cathode of the diode D1 is connected to the dotted terminal of the coil on the N1 side;
the capacitor C1 has an anode and a cathode, the anode of the capacitor C1 is connected to the positive electrode of the dc power Vin, and the cathode of the capacitor C1 is connected to the dotted terminal of the N2 side coil.
2. The O-Z source Boost converter according to claim 1,
when the switch tube S is turned on, the voltage across the coil at the N1 side is higher than the voltage of the dc power Vin, the diode D1 is turned off in the reverse direction, that is, the diode D1 prohibits the current from flowing in the reverse direction, at this time, the dc power Vin, the capacitor C1, the coil at the N2 side and the switch tube S form a loop, the O-Z source network stores charge energy through the capacitor C1, and the capacitor C2 supplies energy to the load R;
when the switch tube S is turned off, the capacitor C2 is charged by the dc power Vin and the O-Z source network together, and the load R is supplied with energy by the dc power Vin and the O-Z source network together.
3. The O-Z source Boost converter according to claim 1, wherein the number of turns of the N1 side coil is greater than the number of turns of the N2 side coil.
4. The O-Z source Boost converter according to claim 1, characterized in that the gain of the converter is 1/(1-AD); wherein: d is the on duty ratio of the switching tube S, and A is the turn ratio of the coil at the N1 side to the coil at the N2 side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121408685.5U CN215420103U (en) | 2021-06-21 | 2021-06-21 | O-Z source Boost converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121408685.5U CN215420103U (en) | 2021-06-21 | 2021-06-21 | O-Z source Boost converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215420103U true CN215420103U (en) | 2022-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121408685.5U Expired - Fee Related CN215420103U (en) | 2021-06-21 | 2021-06-21 | O-Z source Boost converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215420103U (en) |
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2021
- 2021-06-21 CN CN202121408685.5U patent/CN215420103U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220104 |