CN109818494B - High-gain voltage type quasi-Y source direct current-direct current converter - Google Patents
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Abstract
The invention discloses a high-gain voltage type quasi-Y source direct current-direct current converter, which combines a Y source network and a Boost impedance network, flexibly determines the voltage gain of a circuit by utilizing a three-winding transformer in the Y source network, and can realize higher boosting under the same duty ratio. Therefore, the problems that the traditional Boost converter can only obtain higher output voltage by improving the duty ratio, but can cause the current peak value of an output diode and a switching tube to be increased, the conduction loss and the capacitance impact are increased, the conversion efficiency of the circuit is low and the service life is short are solved, so that the converter has the advantages of high conversion efficiency and high voltage gain, and the circuit structure is simple and reliable.
Description
Technical Field
The invention relates to the technical field of direct current-direct current converters, in particular to a high-gain voltage type quasi-Y source direct current-direct current converter.
Background
With the development of human society, industrial production leads to an increase in energy consumption all over the world, and the supply shortage phenomenon is becoming serious due to the rapid decrease in non-renewable energy reserves represented by fossil fuels. Therefore, renewable energy becomes a hot spot of research of numerous scholars due to the characteristics of clean and sustainable development, and for the power generation mode of new energy, no matter photovoltaic power generation or fuel cell power generation, the output voltage fluctuation is large, so that a direct current-direct current conversion circuit with a high gain ratio is required to ensure that the output voltage is high and stable direct current voltage. At present, the dc-dc converter widely used includes a direct circuit and a transformer isolation circuit, which can convert dc voltage, but have the disadvantages of short circuit of power supply or overvoltage breakdown of switching device, poor reliability and low step-up capability when the power switch is turned on or off in a common state. The voltage type/current type impedance source direct current converter based on the traditional impedance source converter idea can overcome the defect of poor circuit reliability, but the boosting capacity is limited, and if the voltage gain is further improved, the cascade connection of an impedance source network is needed, so that the circuit cost is greatly improved, and the control of the converter is relatively complex.
Therefore, it is an urgent need to solve the problem of providing a dc-dc converter with high voltage gain, simple circuit and high reliability.
Disclosure of Invention
In view of this, the invention provides a high-gain voltage type quasi-Y source dc-dc converter based on the idea of a Y source converter, which combines a Y source network with a conventional Boost impedance network to realize stepless regulation of output dc voltage, and simultaneously avoids power supply short circuit and damage of a switching device caused by common-state conduction of a power switch.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high-gain voltage type quasi-Y source direct current-direct current converter comprises a direct current voltage source, a power electronic switch, a Boost network, a quasi-Y source network and a direct current load; the direct-current voltage source is connected with the power electronic switch, the Boost network, the quasi-Y source network and the direct-current load; the quasi-Y source network is connected to the Boost network in an embedded mode; the Boost network is connected with the direct current load; the power electronic switch is connected with the Boost network and the quasi-Y source network.
Preferably, the quasi-Y source network is composed of an inductor L1Three-winding coupling inductor and capacitor C1And a capacitor C2Forming; the inductance L1Connecting the capacitor C1And the three-winding coupling inductor; the three-winding coupler and the capacitor C2Are connected.
Preferably, two power electronic switches are provided, and the power electronic switches are IGBT modules, power MOSFETs or are formed by connecting power diodes and full-control power electronic devices in an anti-parallel mode.
Preferably, the direct-current voltage source is a storage battery pack, a fuel cell, a distributed power supply or an alternating-current power supply subjected to uncontrollable rectification and filtering.
Preferably, the two power electronic switches adopt a complementary on-off control mode, so that simple control of a circuit is realized.
Preferably, the power electronic switch adjusts the output voltage gain by adjusting the duty ratio, and also can appropriately increase the gain ratio of the converter by selecting an appropriate turn ratio of the coupling inductor.
Preferably, the three-winding coupling inductor in the quasi-Y source network adopts an E-shaped magnetic core, so that the size of the circuit is reduced, the leakage inductance is reduced to a certain extent, and the influence of the leakage inductance on the circuit is reduced.
Preferably, the high-gain voltage type quasi-Y source DC-DC converter has two working states of direct connection and non-direct connection.
According to the technical scheme, compared with the prior art, the invention discloses a high-gain voltage type quasi-Y source direct current-direct current converter, and the improved quasi-Y source direct current-direct current converter is formed by combining a Boost converter on the basis of the traditional quasi-Y source circuit structure, so that the advantages of extremely high Boost ratio and flexibility in designing a magnetic winding of the traditional Y source direct current-direct current converter are inherited, and the high-gain voltage type quasi-Y source direct current-direct current converter has the characteristics of high voltage gain, continuous input current, small starting impact current and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of a circuit structure of a high-gain voltage type quasi-Y source DC-DC converter provided by the present invention;
FIG. 2 is a schematic diagram of an applied circuit structure of a converter provided by the present invention;
FIG. 3 is a schematic diagram of a circuit connection structure for two operating states according to the present invention;
FIG. 4 is a schematic structural diagram of an equivalent switch circuit diagram of the integrated IGBT module provided by the invention;
FIG. 5 is a schematic diagram illustrating theoretical voltage gain variations applied to a converter by different winding factors according to the present invention;
FIG. 6 is a schematic diagram of a pulse signal provided by the present invention;
FIG. 7 is a schematic diagram of the variation of the inductive current provided by the present invention;
FIG. 8 is a schematic diagram illustrating the variation of the capacitor voltage provided by the present invention;
fig. 9 is a schematic diagram of the variation of the input voltage and the output voltage provided by the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a high-gain voltage type quasi-Y source direct current-direct current converter, which comprises a direct current voltage source, a power electronic switch, a Boost network, a quasi-Y source network and a direct current load; the direct-current voltage source is connected with the power electronic switch, the Boost network, the quasi-Y source network and the direct-current load; the quasi-Y source network is embedded and connected into a Boost network; the Boost network is connected with the quasi-Y source network and the direct current load; the power electronic switch is connected with the Boost network and the quasi-Y source network.
In order to further optimize the technical scheme, the quasi-Y source network is composed of an inductor L1Three-winding coupled inductor and capacitor C1And a capacitor C2Forming; inductor L1Connecting capacitor C1And a three-winding coupling inductor; three-winding coupler and capacitor C2Are connected.
In order to further optimize the technical scheme, the power electronic switch is formed by connecting an IGBT module and a power MOSFET or a power diode and a full-control power electronic device in an anti-parallel mode, the IGBT module is integrated, and the PWM control signal is used for controlling the on-off of a switch tube, so that the voltage gain and the efficiency of the system are effectively improved.
In order to further optimize the technical scheme, the direct-current voltage source is a storage battery pack, a fuel cell, a distributed power supply or an alternating-current power supply subjected to uncontrollable rectification and filtering.
In order to further optimize the technical scheme, the output voltage gain is adjusted by adjusting the duty ratio of a pulse signal for controlling the power electronic switch, and meanwhile, the gain ratio of the converter can also be properly improved by selecting the proper turn ratio of the coupling inductor.
In order to further optimize the technical scheme, the two power electronic switches can be switched on and off in a complementary mode, and the simplicity of circuit control is improved.
In order to further optimize the technical scheme, the three-winding coupling inductor in the quasi-Y source network adopts an E-shaped magnetic core, so that the volume of a circuit is reduced, leakage inductance is reduced to a certain extent, the leakage inductance between the coupling inductors can cause larger switching transient and reduce the effective switching duty ratio, and therefore the voltage gain and the efficiency of the system are reduced, the leakage between the coupling inductors is reduced as much as possible, and the influence on the circuit is reduced.
In order to further optimize the technical scheme, the invention has two working states of direct connection and non-direct connection, and the two power electronic switches are respectively SW1And SW2When SW1Conducting SW2When the converter is switched off, the converter is in a through state; when SW2Conducting SW1When turned off, the converter of the present invention is in a non-shoot-through state.
In order to further optimize the technical scheme, the three-winding coupling inductor comprises three groups of winding coils N1、N2And N3One end of each winding coil is respectively a first end, a second end and a third end of the three-winding coupling inductor; the power electronic switch comprises SW1And SW2(ii) a The DC power supply is Vin(ii) a The Boost impedance network comprises L0、C0、D0And D2(ii) a DC load of RLoadAnd C3；VinThe positive electrode passes through L in turn0、SW2、C0Back connected to VinA negative electrode; SW2And C0Is sequentially passed through L1、D1Connecting three windings coupled electricityA first end of the inductor, a second end of the three-winding coupled inductor passing through C2Back connected to VinA negative electrode; the third end of the three-winding coupling inductor passes through SW1Back connected to VinNegative electrode, L1Also through C1Is connected to SWI，L0And also by D0Is connected to SW1，SW1Are connected in parallel with D at both ends2And a DC load RLoadAnd C3Are connected in parallel.
Examples
When SW1Close, SW2When the circuit is disconnected, the circuit is in a through state, and the circuit connection condition is as follows: vinPositive electrode passing through L0Back connected to VinNegative electrode, L0And VinThe node between the negative electrodes sequentially passes through the third end of the three-winding coupling inductor, and the second end of the three-winding coupling inductor passes through the C2Back connected to VinNegative electrode, L0And VinThe nodes between the negative electrodes also sequentially pass through C1、L1And C0Back connected to VinAnd a negative electrode.
The circuit shown in FIG. 3(a) operates in the through state with the diode D0Conducting, diode D1And D2Is under reverse bias and is turned off. Applying Kirchhoff's Voltage Law (KVL) in this mode, the voltage equation in the through state is:
-Vin+VL0＝0 (1)
-VC0+VL1-VC1＝0 (2)
VC2+VN2-VN3＝0 (3)
N1：N2：N3＝VN1：VN2：VN3 (4)
N1，N2and N3Is the number of winding turns of the coupling inductor. Substituting formula (4) for formula (3) to obtain:
when SW1Disconnect, SW2When the circuit is closed, the circuit is in a non-through state, and the circuit connection condition is as follows: vinThe positive electrode passes through L in turn0And C0Back connected to VinNegative electrode, L0And C0Is connected through L1Connecting the first end of the three-winding coupling inductor, and connecting the second end of the three-winding coupling inductor through C2Back connected to VinThe negative pole and the third end of the three-winding coupling inductor are connected back to the V through a direct current loadinThe first end and the third end of the negative electrode and the three-winding coupling inductor are connected with C in parallel1。
In the non-through state of the circuit shown in FIG. 3(b), the diode D0Is in reverse bias and is turned off, and the diode D1And D2The voltage equation in the on, non-through state is:
-Vin+VL'0+VC0＝0 (6)
-VC0+VL'1-VC1-V0＝0 (7)
-VC1+VL'1+VN'1+VN'2+VC2＝0 (8)
VC1+VN'1+VN'3＝0 (9)
substituting equation (4) into equation (9) can yield:
then there are:
according to the volt-second balance principle, the voltage across the inductor is zero in one period in a steady state. For the inductance L0、L1And the coupled inductance coil has the following relationship:
substituting equations (5) and (11) into equation (14) can yield:
then, the following compounds (2), (4), (8), (11) and (15) are simultaneously obtained and substituted into the formula (13):
substitution of (2), (7) and (16) for formula (13) gives:
definition of
Equation (17) can be rewritten as:
when formula (12) is substituted with formula (1) or formula (6), the following are present:
the voltage gain calculation formula of the circuit is obtained by combining the formula (18) and the formula (19):
as can be derived from equation (20), the total gain can be changed by changing the duty ratio D and the turn ratio K to improve the circuit boosting performance, as shown in fig. 5. It can be seen that by increasing the turns ratio K, high transmission gain can be achieved at a smaller duty cycle, and the improved quasi-Y source network has a higher voltage-to-gain ratio than the conventional Z source network.
With different winding turns ratios (N)1：N2：N3) But with the same winding factor K, the values of the voltage gain and D are summarized in table 1 below:
TABLE 1 table of the variation of voltage gain and duty ratio values at different winding turns ratios
From the above table, it can be known that the winding factor K of the three-winding coupled inductor may be the same, and the voltage gain is changed by changing the duty ratio D. The circuit topology has more flexibility due to the multiple options of the turn ratio of the three-winding coupling inductor.
The invention carries out test verification, a low-power open-loop test prototype is set up in a laboratory, and TMS320F2812 is used for outputting a group of complementary PWM pulse signals so as to control the on-off of the switch. In order to reduce leakage inductance, the three-winding coupling inductor adopts an E-shaped magnetic core and uses a flyback winding method during manufacturing. The following table 2 is a table of experimental setup parameter values and test results.
Table 2 experimental numerical table
When D is 0.144 and K is 3, the inductance current and the capacitance C are respectively0And C2And the experimental waveforms of the input and output voltages at steady state are shown in fig. 7-9. It can be concluded from the experimental oscillogram that all waveform parameter values are close to the theoretical values, and the output voltage is connectedAnd (4) calculating the value.
FIG. 6 shows a switch SW1Fig. 7 shows the inductance L0And L1Fig. 9 shows the input voltage V when K is 4 and D is 0.144inAnd an output voltage VoutThe waveform of (a) changes. The mathematical derivation and experimental result verification clearly prove that the expected performance and the practicability of the direct current-direct current converter provided by the invention are superior to those of the traditional converter, the direct current-direct current converter has higher voltage gain and simpler circuit structure, and the total gain is changed by changing the duty ratio and the turn ratio, so that the boost performance of the circuit is improved.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. A high-gain voltage type quasi-Y source dc-dc converter, comprising: the system comprises a direct current voltage source, a power electronic switch, a Boost network, a quasi-Y source network and a direct current load; the direct-current voltage source is connected with the power electronic switch, the Boost network, the quasi-Y source network and the direct-current load; the quasi-Y source network is connected to the Boost network in an embedded mode; the Boost network is connected with the direct current load; the power electronic switch is connected with the Boost network and the quasi-Y source network;
the quasi-Y source network is composed of an inductor L1Three-winding coupling inductor and capacitor C1And a capacitor C2Forming; the inductance L1Connecting the capacitor C1And the three-winding coupling inductor; the three-winding coupler and the capacitor C2Connecting;
the three-winding coupling inductor comprises three groups of winding coils N1、N2And N3One end of each winding coil is respectively a first end, a second end and a third end of the three-winding coupling inductor; the power electronic switch comprises SW1And SW2(ii) a The DC power supply is Vin(ii) a The Boost impedance network comprises L0、C0、D0And D2(ii) a The DC load is RLoadAnd C3；VinThe positive electrode passes through L in turn0、SW2、C0Back connected to VinA negative electrode; SW2And C0Is sequentially passed through L1、D1Connecting the first end of the three-winding coupling inductor, wherein the second end of the three-winding coupling inductor passes through C2Back connected to VinA negative electrode; the third end of the three-winding coupling inductor passes through SW1Back connected to VinNegative electrode, L1Also through C1Is connected to SWI，L0And also by D0Is connected to SW1，SW1Are connected in parallel with D at both ends2And a DC load RLoadAnd C3Are connected in parallel;
the power electronic switch adjusts the output voltage gain by adjusting the duty cycle, or increases the gain ratio of the converter by selecting the appropriate turn ratio of the coupled inductor.
2. A high-gain voltage type quasi-Y source dc-dc converter according to claim 1, wherein there are two said power electronic switches, which are IGBT modules, power MOSFETs or are composed of power diodes and fully controlled power electronic devices connected in anti-parallel.
3. The high-gain voltage type quasi-Y source DC-DC converter according to claim 1, wherein the DC voltage source is a battery pack, a fuel cell, a distributed power supply or an AC power supply subjected to uncontrollable rectification and filtering.
4. The high-gain voltage type quasi-Y source DC-DC converter according to claim 2, wherein the two power electronic switches are controlled by complementary on-off control.
5. A high gain voltage type quasi-Y source dc-dc converter according to claim 1, wherein said converter has both pass-through and non-pass-through operating states.
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| CN112491282B (en) * | 2020-11-06 | 2021-10-01 | 东北电力大学 | Y-source two-stage matrix converter modulation method based on carrier PWM |
| CN112398350A (en) * | 2020-11-09 | 2021-02-23 | 哈尔滨工业大学 | double-Y-source high-boost-ratio DC-DC converter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206640502U (en) * | 2017-04-14 | 2017-11-14 | 山东科技大学 | New quasi- source of resistance cascaded Boost converter |
| CN107959432A (en) * | 2017-12-18 | 2018-04-24 | 哈尔滨工业大学 | A kind of clamp circuit and with lifting step-up ratio and suppress the Y source inventers of DC bus-bar voltage spike |
| CN108418458A (en) * | 2018-03-13 | 2018-08-17 | 广东工业大学 | A kind of half-bridge inverter based on quasi- Y source impedance networks |
| CN208063045U (en) * | 2018-03-12 | 2018-11-06 | 山东科技大学 | A kind of novel quasi- sources Z DC-DC converter |
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| EP3151400B1 (en) * | 2015-09-30 | 2021-06-16 | Nxp B.V. | Resonant converter circuit |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206640502U (en) * | 2017-04-14 | 2017-11-14 | 山东科技大学 | New quasi- source of resistance cascaded Boost converter |
| CN107959432A (en) * | 2017-12-18 | 2018-04-24 | 哈尔滨工业大学 | A kind of clamp circuit and with lifting step-up ratio and suppress the Y source inventers of DC bus-bar voltage spike |
| CN208063045U (en) * | 2018-03-12 | 2018-11-06 | 山东科技大学 | A kind of novel quasi- sources Z DC-DC converter |
| CN108418458A (en) * | 2018-03-13 | 2018-08-17 | 广东工业大学 | A kind of half-bridge inverter based on quasi- Y source impedance networks |
Non-Patent Citations (1)
| Title |
|---|
| Quasi-Y-Source Boost DC–DC Converter;Yam P. Siwakoti等;《IEEE Transactions on Power Electronics》;20151231;第30卷(第12期);第6514-6518页第I-II节、图1-2、表II * |
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