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    • 专利摘要:
    DC-DC converter of one input and multiple outputs without transformer and power converter that applies it. New configurations of DC-DC converters with one input and multiple outputs (R) without transformer and power converter that applies them. It comprises a single DC source (Vg) connected in series with an inductor (L) and with a power switch (S1), so that at least two converters share the DC source (Vg), the inductor (L) and the power switch (S1), selected from: a Boost converter, in parallel with the power switch (S1); a CUK converter, in parallel with the power switch (S1); a SEPIC converter, in parallel with the power switch (S1); a CSC converter, in parallel with the inductor (L) and the power switch (S1); a Buck-Boost converter, in parallel with the inductor (L); a Zeta converter, in parallel with the inductor (L). The inverter can extend its power range by inserting several DC converters whose control signals of the power switches are out of phase. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2676435A1
    申请号:ES201730054
    申请日:2017-01-18
    公开日:2018-07-19
    发明作者:Eladio DURÁN ARANDA；Salvador PÉREZ LITRÁN；María Bella FERRERA PRIETO
    申请人:Universidad de Huelva；
    IPC主号:
    专利说明:

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    DESCRIPTION
    CC-CC CONVERTER OF AN INPUT AND MULTIPLE OUTPUTS WITHOUT TRANSFORMER AND POWER CONVERTER THAT APPLIES SECTOR OF THE TECHNIQUE
    The present invention relates to a converter realizable by a series of combinations of configurations applicable to direct current (DC) systems for voltage conversion and obtaining multiple outputs without using transformers. It is therefore applicable in the field of electronics, directly or in any of its final applications (automotive, renewable energy sector ...).
    It also refers to a power converter that applies the DC converter of the invention. STATE OF THE TECHNIQUE
    The systems of feeding with multiple outputs (Single-Input Multiple-Output, SIMO) have traditionally been used in innumerable applications of electrical supplies of power in the form of direct current (DC), with different levels of output voltage as well as in systems of telecommunications, microelectronics, lighting, including electronic ballast or LED technology, electric vehicles (EVs) and hybrids (HEV), both in their isolated versions (with transformer) and not isolated (without transformer).
    Currently, DC-DC converters represent a fundamental part of power electronics, to the point that more DC-DC converters are produced than CA-DC. Recent reports indicate that the production of CC-CC converters occupies the highest percentage of the total turnover of all the production of conversion equipment. The world market for DC-DC converters has grown at an average of 7.5% in recent years. In addition to its high growth rate, the DC-CC converter market is undergoing dramatic changes as a result of the two main trends in the electronics industry: low voltage and high power density.
    On the other hand, the concept of multiport converters applies to static power converters capable of interacting with different sources, storage and load systems and with different voltage levels. In this sense, multiport converters are particularly interesting for distributed power generation systems, where different sources of energy and storage are incorporated.
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    In recent years, different techniques for multiple DC outputs and different voltage levels have been studied and developed, both in their isolated versions, Flyback, Forward, Push-Pull, Half Bridge (Half-Bridge) and Full Bridge (Full- Bridge); as not isolated. They have also been used in a wide variety of applications, including integrated dual-output converters (IDOCs), integrated multi-output converters (IMOCs), and single inductors. with multiple outputs (Single-Inductor Multiple-Output). In addition, emerging power architectures oriented towards renewable energy sources (wind turbines, solar panels and fuel cells), batteries and distributed generation power networks (GD) have proliferated significantly.
    A first classification of multiport converters can be made based on the number of inputs and the number of outputs of which they are configured, which would result in the following: multiple inputs and multiple outputs (Multiple-Input Multiple-Output, MIMO), Multiple input and single output (Multiple-Input Single-Output, MISO), and single-input and multiple outputs (Single-Input Multiple-Output, SIMO). The MIMO and MISO converters are found in DC distribution and other emerging applications such as the integration of renewable energy sources (FER) in electrical networks, energy storage systems (Energy Storage Systems, ESS), interface for satellites and power supply for charging batteries. SIMO DC-DC converters are often used in power supplies with different output voltage levels for applications related to telecommunications, microelectronics, lighting applications, electronic ballast and LED technology, electric vehicles (EVs) and hybrids (HEV). BRIEF EXPLANATION OF THE INVENTION
    The invention consists of a DC converter according to the claims. Presents new topologies of single-input and multiple outputs DC-DC converters, without transformer. These topologies are indicated for exploitation by manufacturers of electronic equipment, for power supplies in the form of DC and in applications that require different output voltages, without the need to use transformers.
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    It presents realizations of DC-DC converters of a single input and multiple outputs, without the need of a transformer, with a single inductor at its input, and that requires for its operation a single power switch and, therefore, a single circuit of control, which results in a smaller size, lower weight and greater simplicity with respect to known SIMO systems.
    A first aspect of the invention relates to a DC converter, with a single DC source connected in series with an inductor and with a power switch. In a novel way it comprises at least two configurations that share the DC source, the inductor and the power switch, each being selected from:
    A Boost configuration, in parallel with the power switch;
    a CUK configuration, in parallel with the power switch;
    a SEPIC configuration, in parallel with the power switch;
    a CSC configuration, in parallel with the inductor and the power switch;
    a Buck-Boost configuration, in parallel with the inductor;
    a Zeta configuration, in parallel with the inductor.
    These configurations (each of a single output) are known in the art and are shown in Figure 1.
    All configurations of fig. 1 can be combined two by two, three by three, four by four, five by five, etc., even doubling a specific type.
    It is also possible to arrange a plurality of groups of two or more converters, all sharing the DC source.
    The invention also relates to a power converter, which comprises M (greater than or equal to 2) direct current converters as indicated, and whose control signals of the power switches are offset 2π / M radians.
    DESCRIPTION OF THE DRAWINGS
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    For a better understanding of the invention, the following figures are included with different non-limiting embodiments.
    Figure 1. This figure shows six traditional non-isolated configurations with one and two inductors, consisting of a single input and a single output (SISO), which will be combined to obtain the new converters of the invention.
    Figure 2. This figure shows eight examples of converters according to the invention: converters with two outputs and a single input, without transformer and with only one power switch, obtained by combining the configurations shown in Figure 1.
    Figure 3. This figure shows five examples of three output converters, together with a four output converter, developed in this invention, all with a single input, without a transformer and with only one power switch.
    Figure 4. This figure shows an example of a converter with six outputs and a single input, without a transformer and with only one power switch, developed in this invention.
    Figure 5. This figure shows an example of a 3N output converter and a single input, without a transformer and with only one power switch, consisting of N Zeta-Buck-Boost converters with three outputs.
    Figure 6. This figure shows an example of a 3N output converter and a single input, without a transformer and with only one power switch, consisting of N SEPIC-CUK-Boost converters with three outputs.
    Figure 7. This figure shows four examples of converters connected in parallel, with interleaved operation, of three outputs and a single input, developed in this invention, forming a power converter. EMBODIMENTS OF THE INVENTION
    Next, an embodiment of the invention will be briefly described as an illustrative and non-limiting example thereof.
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    Figure 1 shows the traditional structures or configurations not isolated with a single inductor, such as the Boost configuration (Figure 1a), the CSC (Canonical Switching Cell) shown in Figure 1f, and the Buck-Boost (Figure 1b), and also configurations of two inductors, such as the CUK configuration (Figure 1c), the SEPIC (Single Ended Primary Inductor Converter) shown in Figure 1d and the Zeta (Figure 1e) consist of a single input and a single output (SISO). All these configurations allow the output (represented by a resistor) under different conditions and are known in the art and therefore do not need to be described in depth.
    All these configurations show the same front part: a DC source (Vg), an inductor (L) and a power switch (S1). This allows these configurations to be combined according to the invention, using the common front part, giving rise to new topologies with a single input and several outputs (R) (SIMO).
    Taking into account that the configurations shown in Figure 1, have the same front part:
    • a DC source
    • an inductor and
    • A power switch has derived new topologies that do not require either a transformer, or several input inductors or individual switches. In return, a single power switch and a single input inductance are used. Several examples are offered in these topologies in the attached Figures. In them the outputs (R) have been represented as resistors.
    Figure 2 shows eight of the embodiments of the invention, all of them with two outputs (R). All of them start by placing the traditional configurations mentioned in parallel, sharing the three common frontal elements.
    An example of a converter combining CSC - Buck-Boost can be seen in Figure 2a. In the upper part of the electrical scheme are the elements of the CSC configuration, while in the lower part are those of the Buck-Boost configuration. The shared common elements (inductor and power switch) are on the bottom left. The electrical connection has been interrupted between the lower part of the CSC configuration and the lower part of the Buck-Boost configuration for simplicity of representation, but would correspond to the same electrical connection.
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    An example is shown in Figure 2b, also with two outputs, applying the Zeta and CSC configurations. It can be seen that the upper part corresponds to that of Figure 2a, as it is the CSC configuration.
    Figure 2c shows a new example applying the Zeta - Buck-Boost configurations. The absence of the capacitor (not required in the Buck-Boost configuration) is appreciated compared to the embodiment of Figure 2b.
    An example with the SEPIC-Boost configurations is shown in Figure 2d. Unlike the previous embodiments, the derivation of the two basic configurations in parallel is carried out on both sides of the power switch.
    Figure 2e shows the CUK-Boost embodiment, also derived on both sides of the power switch.
    In contrast, in the embodiment of Figure 2f the derivations of the CUK and CSC configurations are made at different points, thus sharing a single connection point. The CUK configuration is arranged between both sides of the power switch, while the CSC configuration is arranged between both coil or inductor terminals.
    Similarly, in Figures 2g and 2h there are two other combinations that make the derivations at different points. The first corresponds to a SEPIC-CSC and the second to a converter combining the Boost-CSC configurations.
    Following the rules shown in this Figure 2, it is possible to make more complex realizations that include three or more traditional configurations in parallel, and can be repeated several times.
    In Figure 3, another six examples of embodiment are shown. In this case five embodiments have three outputs (R) and the last four outputs (R).
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    The embodiment of Figure 3a shows a converter combining SEPIC-CUK-CSC. The upper part corresponds to the CSC configuration, the intermediate one to SEPIC and the lower one to CUK. The first two are derived in parallel with the inductor and the last in parallel with the power switch.
    A converter combining CUK-Boost-CSC can be seen in Figure 3b. Unlike the previous one, the intermediate configuration is Boost.
    A converter combining SEPIC-Boost-CSC is shown in Figure 3c. It is similar to that shown in Figure 3b, but having the SEPIC configuration instead of the CUK in parallel with the power switch.
    A new embodiment with three outputs, corresponding to a converter combining SEPIC-CUK-Boost, is shown in Figure 3d. Therefore, the three configurations are arranged in parallel with the common power switch.
    The last embodiment of three outputs (R) shown is shown in Figure 3e. It corresponds to a converter combining Zeta-CSC-Buck-Boost. The Zeta configuration is arranged in parallel with the inductor.
    Finally, Figure 3f shows the only embodiment shown with 4 outputs (R), which also includes configurations in parallel with the inductor and with the power switch. It corresponds to a converter combining SEPIC-Cuk-Boost-CSC.
    Figure 4 shows an embodiment of six outputs (R), corresponding to a converter combining with Zeta configuration at the top, and other configurations including CSC, SEPIC, CUK, Boost and Buck-Boost. It is appreciated that the two upper configurations are in parallel with the inductor, while the lower four are in parallel with the power switch.
    These structures can be generalized for converters with 2N, 3N, 4N and 6N outputs (R) and a single input (where N is the number of converters). Figure 5 shows a generalization for N Zeta-Buck-Boost converters with two outputs, resulting in 2N total outputs (R) (shown in Figure 5a) and three outputs resulting in 3N total outputs (shown in Figure 5b) Figure 6 shows a generalization for N SEPIC-CUK-Boost three-output combined converters, for 3N total outputs (R).
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    For high power applications, the developed combinations can be extended to parallel coupled configurations operating in interleaved mode (shown in Figure 7 for four converter combinations). In general, the interleaving technique consists of offsetting, at a constant frequency, the control signals of the converters that are operating in parallel. This technique provides as a fundamental advantage, with respect to synchronous government (in phase, all switch at the same time) of converters in parallel, that the input current to the converter (that supplied by the DC generator) exhibits lower harmonic content, more curling Damping and lower electromagnetic interference (EMI), in addition to greater power capacity without reducing efficiency.
    The structure proposed in the invention for interleaved operation is shown in Figure 7, for four converters (M = 4). Consider the operation of M parallel converters connected to a DC source. The input current to the converter cluster, Ig is the sum of each current for each converter: I1 + I2 + ... + IM. If all the converters were synchronized, then the system would behave the same as a single power converter equivalent to the sum of all of them. This also applies to curling, which would be added, and in general for any undesirable noise. However, it is known that if the converters are interleaved by adequately offsetting their switching instants (2π / M radians, for M converters), maintaining at all the same switching frequency, the curling can be considerably reduced, due to that when the curls in the currents of the input inductors of each converter are out of phase, they cancel each other. Therefore, with the parallel connection of DC-DC converters in interleaved operation, in addition to increasing the power capacity, curling in the current supplied by the DC source is effectively reduced.
    The interleaved converter shown in Figure 7 has only three outputs (R), but could be generalized for 2N, 3N, 4N, 5N, and even 6N outputs (R). With the technique shown in Figure 7, it is not intended to highlight a number of specific outputs, but to improve the quality (under curling) of the conversion (in the improved embodiment) and an increase in power.
    In this figure, the generator or DC source (Vg), the direct current bus, the loads and the associated output capacitors are shared in the configuration of the four interleaved converters.
    权利要求:
    Claims (1)
    [1]
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    1-DC converter with one input and multiple outputs (R) without transformer, with a single DC source (Vg) connected in series with an inductor (L) and with a power switch
    5 (S1), characterized in that it comprises at least two configurations that share the DC source (Vg), the inductor (L) and the power switch (S1), each selected from:
    a Boost configuration, in parallel with the power switch (S1); a CUK configuration, in parallel with the power switch (S1); 10 a SEPIC configuration, in parallel with the power switch (S1); a CSC configuration, in parallel with the inductor (L) and the power switch
    (S1); a Buck-Boost configuration, in parallel with the inductor (L); a Zeta configuration, in parallel with the inductor (L).
    15 2-DC converter, according to claim 1, characterized in that it has a plurality of groups of two or more configurations, all sharing the DC source (Vg).
    20 3-Power converter, characterized in that it comprises M, greater than or equal to 2, configurations of direct current converters according to claim 1 whose control signals of the power switches (S1) of the converters are offset 2π / N radians .
    10
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    同族专利:
    公开号 | 公开日
    ES2676435B1|2019-03-14|
    引用文献:
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    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201730054A|ES2676435B1|2017-01-18|2017-01-18|CC-CC CONVERTER OF AN INPUT AND MULTIPLE OUTPUTS WITHOUT TRANSFORMER AND POWER CONVERTER THAT APPLIES|ES201730054A| ES2676435B1|2017-01-18|2017-01-18|CC-CC CONVERTER OF AN INPUT AND MULTIPLE OUTPUTS WITHOUT TRANSFORMER AND POWER CONVERTER THAT APPLIES|
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