CN111555651A - Multi-level flying capacitor converter module - Google Patents
Multi-level flying capacitor converter module Download PDFInfo
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- CN111555651A CN111555651A CN202010082475.5A CN202010082475A CN111555651A CN 111555651 A CN111555651 A CN 111555651A CN 202010082475 A CN202010082475 A CN 202010082475A CN 111555651 A CN111555651 A CN 111555651A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/487—Neutral point clamped inverters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/4837—Flying capacitor converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0095—Hybrid converter topologies, e.g. NPC mixed with flying capacitor, thyristor converter mixed with MMC or charge pump mixed with buck
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The invention relates to a multi-level flying capacitor converter module comprising a first sub-module and a second sub-module separate from the first sub-module, wherein at least one of the first and second sub-modules is clamped to a power source, in particular a DC source, via a DC capacitor, and wherein at least one of the first and second sub-modules comprises a flying capacitor different from the first capacitor and a plurality of power switches, each of the plurality of power switches comprising a semiconductor switch and a diode.
Description
Technical Field
The present invention relates to flying capacitor multilevel converters, and in particular to multilevel flying capacitor converters suitable for high power and high switching frequency applications.
Background
Multilevel converters/inverters and voltage boosters are attracting considerable interest increasingly, in particular in the technical field of, for example, solar or wind power plants, electric vehicle chargers. Multi-level inverters enable higher power ratings, higher efficiency and lower harmonic distortion than simple single-level inverters. The following three basic multilevel inverter architectures are known: multi-point clamping (or diode clamping), flying capacitors (i.e., floating with respect to ground), and cascaded H-bridges with a separate Direct Current (DC) source. Three-level neutral point clamped (3L-NPC) converters have been widely used for high power medium voltage applications. The main drawback of the 3L-NPC topology can be seen in the loss distribution imbalance between the power devices. The three-level ANPC (3L-ANPC) topology is an effective way to solve this problem by replacing the 3L-NPC clamp diodes with switching devices. Thus, the 3L-ANPC can change the loss profile of the power device by switching different zero states in the commutation strategy.
In principle, flying capacitor inverters exhibit the following architecture: the voltage balancing characteristics for passive loads are automatically guaranteed and therefore an attractive alternative for multi-point clamped inverters is provided. Fig. 1 shows one branch of a prior art 3-level flying capacitor converter comprising diodes (D1, D2, D3, D4), capacitors (C _ int, C1) and switches or transistors in the form (T1, T2, T3, T4). One of the capacitors (C int) is clamped to the power source (DC +, DC-) and the other capacitor (C1) represents a flying capacitor that floats with respect to ground potential. Each of the 3 branches of the converter outputs one current phase of the generated alternating current obtained by the converter. Similarly, fig. 2 shows an example of a prior art 5-level flying capacitor converter comprising six pairs of transistors and diodes and two flying capacitors. Herein, a pair of a transistor and a diode is represented as a power switch for convenience.
However, present flying capacitor multilevel converter/inverter and booster topologies, among others, do not adequately address the following needs: low inductive connection to required capacitors, low inductive closing of the commutation loop, and high achievable power output from flying capacitor topologies in the power module.
It is an object of the present invention to provide a multilevel flying capacitor converter module that meets the above needs.
Disclosure of Invention
The present invention meets the above objects by providing a multi-level flying capacitor converter module comprising at least a first sub-module and a second sub-module different from the first sub-module. Here and in the following, the term "converter" includes a DC to AC inverter, but the term is not limited thereto. The converter may be implemented, for example, at least in part in the form of a BUCK (BUCK DC to DC) power converter, a BOOST (BOOST DC to DC) power converter, or a combination thereof. For example, the multilevel converter may be a 3-level converter or a 5-level converter. The second sub-module is separate from the first sub-module and may be formed on a second substrate that is different from the first substrate on which the first sub-module is formed.
At least one of the first and second sub-modules is clamped to a power source, in particular a DC source, via a first capacitor (DC capacitor). For example, the first sub-module includes a DC capacitor. Further, at least one of the first and second sub-modules comprises (its own, not shared by the other sub-module) (distinct from the DC capacitor and floating with respect to ground) a flying capacitor and a plurality of power switches, each of which comprises or consists of a semiconductor switch and a diode (its own semiconductor switch and diode not shared with any other one of the power switches). The semiconductor switch may be a transistor such as a MOSFET or an insulated gate bipolar transistor. The flying capacitor may be connected to two of the plurality of power switches. The first and second sub-modules, which in combination with each other form a branch of the converter, are configured to output a single current phase based on the current input by the power source. The outputted current phase may be supplied to an Alternating Current (AC) grid or some capacitive load.
Unlike the prior art, the branches of the converter circuit are distributed among at least two submodules (or are formed on at least two different substrates). Due to this distributed topology, in particular, a reduced capacitance of the external DC link capacitor compared to topologies known in the prior art can advantageously be achieved resulting in a cost reduction and an increased power output.
According to an embodiment, the first sub-module is configured to output a positive half-wave of a current phase of the alternating current and the second sub-module is configured to output a negative half-wave of the current phase. In this case, the first flying capacitor of the first sub-module is connected to a node between the power switches in the first power switch pair and the other node between the diodes in the first diode pair, one of the power switches in the first power switch pair being directly connected to the positive pole of the power source, and the second flying capacitor of the second sub-module is connected to a node between the power switches in the second power switch pair and the other node between the diodes in the second diode pair, one of the power switches in the second power switch pair being directly connected to the negative pole of the power source. Here and in the following description, any mentioned pair of power switches consists of two power switches connected in series, and any mentioned pair of diodes consists of two diodes connected in series. Neither the diodes of the first diode pair nor the second diode pair are part of one of the power switches of the respective sub-modules. By this configuration, a very efficient DC to AC inverter can be provided.
According to a particular embodiment, a 5-level DC-to-AC inverter is provided. In this case, the first sub-module comprises three power switches connected in series and an additional three diodes connected in series, a first and second flying capacitor, and a first capacitor, wherein the first flying capacitor is connected to a node between the first and second of the three power switches and to a cathode of the first of the three diodes, and wherein the second flying capacitor is connected to another node between the second and third of the three power switches and to a cathode of the second of the three diodes. In addition, the second sub-module comprises three power switches connected in series and an additional three diodes, a first flying capacitor and a second flying capacitor connected in series, wherein the first flying capacitor is connected to a node between the first and second of the three power switches and to a cathode of the first of the three diodes, and wherein the second flying capacitor is connected to another node between the second and third of the three power switches and to a cathode of the second of the three diodes.
According to an alternative embodiment, the branch circuits are distributed differently from the method described above. In this alternative embodiment, the first sub-module includes a DC capacitor and a second capacitor connected between the power switches of the first pair of power switches formed in the first sub-module. Further, the second sub-module includes a flying capacitor connected to a power switch of a second pair of power switches formed in the second sub-module. Furthermore, the first sub-module and the second sub-module are electrically connected to each other. The second sub-module is not clamped to the power source and includes an output configured to output a current phase and positioned between the power switches of the second power switch pair. In the case of a 5-level converter, the embodiment may further comprise a third sub-module electrically connected to the first and second sub-modules and comprising a further flying capacitor connected to a power switch of a third pair of power switches formed in the third sub-module.
During operation of the multi-level flying capacitor converter module according to one of the above examples, a first closed commutation loop may be formed in the first sub-module and a second closed commutation loop, different from the first closed commutation loop, may be formed in the second sub-module.
Additionally, a power module is provided comprising a multi-level flying capacitor converter module according to one of the above embodiments. For example, the power module may be suitable for use in solar, wind and hydro power plants.
Furthermore, there is provided a use/operation of the multi-level flying capacitor converter module of any of the above embodiments, at least in part, as a BUCK power converter, a BOOST power converter or a combination thereof. Accordingly, a method of inverting, boosting or stepping down a direct current provided by a direct current power source is provided. The method comprises the following steps: providing a multilevel flying capacitor converter module according to one of the above embodiments or the above power module; and controlling the plurality of power switches to:
a) inverting the direct current into an alternating current by means of at least a first submodule and a second submodule; or
b) Boosting the direct current by means of at least one of the first submodule and the second submodule; or
c) The dc power is stepped down by means of at least one of the first and second sub-modules.
Additional features and advantages of the invention will be described with reference to the accompanying drawings. In the description, reference is made to the accompanying drawings which are intended to illustrate preferred embodiments of the invention. It should be understood that such embodiments do not represent the full scope of the invention.
Drawings
Fig. 1 shows a prior art 3-level flying capacitor converter.
Fig. 2 shows a prior art 5-level flying capacitor converter.
Fig. 3 shows a circuit diagram of a portion of a 3-level flying capacitor converter module according to an embodiment of the invention.
Fig. 4 shows a circuit diagram of a portion of a 5-level flying capacitor converter module according to another embodiment of the invention.
Fig. 5 shows a circuit diagram of a portion of a 3-level flying capacitor converter module according to another embodiment of the invention.
Fig. 6 shows a circuit diagram of a portion of a 5-level flying capacitor converter module according to another embodiment of the invention.
Detailed Description
The present invention provides a multi-level (e.g., 3-level or 5-level) flying capacitor converter module that is particularly suitable for operation in solar or wind power plants, electric vehicle chargers, and the like. In some embodiments, the disclosed multi-level flying capacitor converter module is adapted to supply Alternating Current (AC) power to an AC grid at a grid frequency, wherein the module is clamped to some Direct Current (DC) source. The DC source may be embodied as any type of DC source configured to generate or produce DC power that is supplied to the module.
For example, the DC power may be implemented as a photovoltaic solar cell or array, a fuel cell, a wind turbine configured to generate DC power (e.g., via a rectifier circuit), a water turbine configured to generate DC power, or other unipolar power source. In particular, the multi-level flying capacitor converter module may be configured to convert a DC waveform generated by a DC source into an AC waveform suitable for delivery to an AC electrical grid and, in some embodiments, to a load coupled to the AC electrical grid. The AC power grid may be, for example, a utility grid that supplies utility AC power to residential and commercial customers. Such a utility grid may have a substantially sinusoidal bipolar voltage at a fixed grid frequency, e.g., f ω/2 pi 50Hz or 60 Hz.
According to the invention, the converter module is divided into at least two separate sub-modules, each of which may be formed on a separate substrate. Fig. 3 shows one branch of a 3-level flying capacitor converter module according to an embodiment of the invention. Figure 4 accordingly shows one branch of a 5-level flying capacitor converter module according to an embodiment of the present invention. It has to be noted that although the following description is limited to 3-level converters and 5-level converters, any multi-level converter design is also covered by the present invention.
As shown in fig. 3, the 3-level flying capacitor converter module of this embodiment includes two sub-modules (see left and right sides of the figure). The three-level topology is used to reduce switching losses and workload of the output filter. For example, the topology shown in FIG. 3 may be substituted for the topology shown in FIG. 1, which represents an example of the prior art. One of the submodules may be formed on a first substrate and another of the submodules may be formed on a second substrate different from the first substrate. Each of the sub-modules may comprise a capacitor (DC capacitor) C int for clamping to the same DC source (DC +, DC-). The capacitors C _ int can in principle be completely or partially identical for both submodules (if the capacitors C _ int are identical, the submodules are formed on only one of the first and second substrates). Unlike the prior art, the conversion to one AC phase is performed by one of the submodules for the positive half-wave (left side) and the other of the submodules for the negative half-wave (right side). The distribution of the conventional circuit (as shown in fig. 1) in two submodules/on two separate substrates particularly enables higher powers to be obtained compared to the prior art.
As shown in fig. 3, the left sub-module includes a transistor T1 and a diode D1 forming a first power switch and a T2 and a diode D2 forming a second power switch. Further, here and in the following description, the transistors in the power switch may be replaced by any semiconductor switch. Flying capacitor C1 is connected (with one capacitor electrode) to a node between the first and second power switches, and flying capacitor C1 is connected (with another capacitor electrode) to another node between the additional diodes D5 and D6 (actually connected to the anode of diode D5 and the cathode of diode D6).
Accordingly, the right sub-module includes a transistor T3 and a diode D3 forming a third power switch and a transistor T4 and a diode D4 forming a fourth power switch (two power switches are present in each of the sub-modules). Flying capacitor C2 is connected (with one capacitor electrode) to a node between the third and fourth power switches and flying capacitor C2 is connected (with another capacitor electrode) to another node between the additional diodes D7 and D8 (actually connected to the anode of diode D7 and the cathode of diode D8). Here and in the following, some or each of the transistors may be MOSFET transistors, in particular insulated gate bipolar transistors. A closed commutation loop having a relatively low commutation loop inductance is formed in each of the submodules shown in fig. 3.
Figure 4 shows one branch of a 5-level flying capacitor converter module. The 5-level design, while more complex, produces lower harmonics than the 3-level design. As shown in fig. 4, the 5-level flying capacitor converter module of this embodiment also includes two sub-modules (see left and right sides of the figure). For example, the topology shown in FIG. 4 may be substituted for the topology shown in FIG. 2, which represents an example of the prior art. One of the submodules may be formed on a first substrate and another of the submodules may be formed on a second substrate different from the first substrate. Each of the sub-modules may include a capacitor for clamping to the same DC source. The capacitor may in principle be completely or partially identical for both submodules (if the capacitor is identical, the submodule is formed on only one of the first and second substrates). Unlike the prior art, the conversion to one AC phase is performed by one of the submodules for the positive half-wave and the other of the submodules for the negative half-wave. The distribution of the conventional circuit (as shown in fig. 2) in two submodules/on two separate substrates particularly enables higher powers to be obtained compared to the prior art.
As shown in fig. 4, the left sub-module includes three power switches, each of which is composed of a transistor and a diode. The flying capacitor is connected to a node between the power switches of the first power switch pair and another node between the diodes of the first additional diode pair. The other flying capacitor is connected to a node between the power switches of the second power switch pair (sharing one of the power switches with the first pair of power switches) and to another node between the diodes of the second additional diode pair (sharing one of the diodes with the first diode pair).
Correspondingly, the right sub-module comprises three power switches (complementary to the power switches in the sub-module shown on the left in fig. 4), each of which consists of a transistor and a diode (three power switches are present in each of the sub-modules). A flying capacitor is connected to a node between the power switches of the power switch pair and another node between the diodes of the additional diode pair, and another flying capacitor is connected to a node between the power switches of the other power switch pair and another node between the diodes of the other additional diode pair. A closed commutation loop having a relatively low commutation loop inductance is formed in each of the submodules shown in fig. 4.
Note that in the embodiments shown in fig. 3 and 4, the positive half-wave sub-module may operate as a BUCK (BUCK DC to DC) power converter. On the other hand, the negative half-wave sub-module in the embodiments of the multilevel flying capacitor converter shown in fig. 3 and 4 may operate as a BOOST (BOOST DC to DC) power converter. External capacitors may be added to the configurations shown in fig. 3 and 4, if desired.
Fig. 5 shows a circuit diagram of a portion of a 3-level flying capacitor converter module according to another embodiment of the invention. Also, the conventional circuit as shown in fig. 1 is distributed in two submodules (on two separate substrates). One of the sub-modules includes an internal power switch and another of the sub-modules includes an external power switch. One sub-module of the branch (shown on the left) comprises a capacitor C1 clamped to a DC source and a capacitor C2 connected between power switches, one of which consists of a transistor T1 and a diode D1, and the other of which consists of a transistor T2 and a diode D2.
The other submodule (shown on the right) of the branch comprises two further power switches, one of which is composed of a transistor T3 and a diode D3, and the other of which is composed of a transistor T4 and a diode D4. In addition, the other sub-module includes a flying capacitor C3 connected to the power switch. The other submodule is not directly clamped to the DC source but is electrically connected to the submodule comprising capacitor C1 clamped to the DC source. Also, a closed swap back loop may be formed in each of the sub-modules, and the distribution of the conventional circuit in both sub-modules enables a higher power gain compared to the prior art.
The concept of the distribution of the circuit described with reference to fig. 5 can also be translated into a 5-level (or higher) converter module, as shown in fig. 6. The converter module shown in fig. 6 comprises an additional (third) sub-module. Each of the sub-modules includes two of the sixth power switches (each composed of a transistor and a diode) used in the 5-level design. The first submodule (see left side of fig. 6) comprises a capacitor clamped to the DC source and a capacitor connected between the power switches of the first power switch pair. The second sub-module of the embodiment shown in figure 6 comprises a pair of power switches, a capacitor connected between the power switches and a flying capacitor connected to the power switches. The third sub-module (see middle sketch and right side of fig. 6) corresponds to the second sub-module of the 3-level design shown in fig. 5.
Note that in the embodiments shown in fig. 5 and 6, the sub-modules may operate as a combined BUCK power converter and BOOST power converter.
In particular, a multi-level flying capacitor converter module is provided comprising a circuit as shown in one of figures 3 to 6.
The above described embodiments all provide the advantages of high switching frequency, highly integrated configuration and reduced capacitance of the external DC link capacitor compared to topologies known in the prior art, resulting in reduced cost and increased power output.
All of the previously discussed embodiments are not intended to be limiting, but rather serve as examples to illustrate the features and advantages of the present invention. It will be appreciated that some or all of the features described above may also be combined in different ways.
Claims (10)
1. A multi-level flying capacitor converter module comprising:
a first sub-module and a second sub-module separate from the first sub-module;
wherein at least one of the first and second sub-modules is clamped to a power source, in particular a DC source, via a DC capacitor;
wherein at least one of the first and second sub-modules comprises a flying capacitor different from the first capacitor and a plurality of power switches, each of the plurality of power switches comprising a semiconductor switch and a diode.
2. The multilevel flying capacitor converter module of claim 1, wherein the first sub-module is configured to output a positive half-wave of a current phase of an alternating current and the second sub-module is configured to output a negative half-wave of the current phase.
3. The multilevel flying capacitor converter module of claim 2,
a first flying capacitor of the first sub-module connected to a node between the power switches of a first power switch pair and another node between the diodes of a first diode pair, one of the power switches of the first power switch pair being directly connected to the anode of the power source; and
the second flying capacitor of the second sub-module is connected to a node between the power switches of the second pair of power switches and to the other node between the diodes of the second pair of diodes, one of the power switches of the second pair of power switches being directly connected to the negative pole of the power source.
4. The multilevel flying capacitor converter module of claim 1,
the first sub-module comprises three power switches connected in series and an additional three diodes connected in series, a first and second flying capacitor, and the first capacitor, wherein the first flying capacitor is connected to a node between a first and second of the three power switches and to a cathode of a first of the three diodes, and wherein the second flying capacitor is connected to another node between the second and third of the three power switches and to a cathode of a second of the three diodes; and
the second sub-module comprises three power switches connected in series and an additional three diodes connected in series, a first flying capacitor and a second flying capacitor, wherein the first flying capacitor is connected to a node between a first power switch and a second power switch of the three power switches and to a cathode of a first diode of the three diodes, and wherein the second flying capacitor is connected to another node between the second power switch and a third power switch of the three power switches and to a cathode of a second diode of the three diodes.
5. The multilevel flying capacitor converter module of claim 1,
the first sub-module comprising the first capacitor and a second capacitor connected between power switches of a first pair of power switches formed in the first sub-module;
the second sub-module comprising the flying capacitor connected to a power switch of a second pair of power switches formed in the second sub-module;
the first sub-module and the second sub-module are electrically connected to each other; and is
The second sub-module further includes an output configured to output a current phase and positioned between the power switches of the second power switch pair.
6. The multi-level flying capacitor converter module of claim 5, further comprising a third sub-module comprising a third pair of power switches and another flying capacitor connected to a power switch of the third pair of power switches, and wherein the third sub-module is electrically connected to the first and second sub-modules.
7. A multilevel flying capacitor converter module according to one of the preceding claims, wherein the first sub-module is formed in a first substrate and the second sub-module is formed on a second substrate different from the first substrate.
8. The multi-level flying capacitor converter module according to one of the preceding claims, wherein in operation of the multi-level flying capacitor converter module a first closed commutation loop is formed in the first sub-module and a second closed commutation loop different from the first closed commutation loop is formed in the second sub-module.
9. A power module comprising a multilevel flying capacitor converter module according to one of the preceding claims.
10. A method of inverting, boosting or stepping down a direct current provided by a direct current power source, the method comprising:
providing a multilevel flying capacitor converter module according to one of claims 1 to 8 or a power module according to claim 9; and
controlling the plurality of power switches to:
d) inverting the direct current into an alternating current by means of at least the first sub-module and the second sub-module; or
e) Boosting direct current by means of at least one of the first and second sub-modules; or
f) Step down the direct current by means of at least one of the first and second sub-modules.
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|---|---|---|---|
| DE102019201720.7 | 2019-02-11 | ||
| DE102019201720.7A DE102019201720A1 (en) | 2019-02-11 | 2019-02-11 | Multi-stage flying capacitor converter module |
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| CN111555651A true CN111555651A (en) | 2020-08-18 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113746322A (en) * | 2021-09-27 | 2021-12-03 | 电子科技大学 | Mixed-mode high-efficiency boost converter |
| CN113783429A (en) * | 2021-09-27 | 2021-12-10 | 电子科技大学 | Hybrid DC-DC boost converter |
| CN113783428A (en) * | 2021-09-27 | 2021-12-10 | 电子科技大学 | Mixed-mode boost converter |
| CN113794374A (en) * | 2021-09-27 | 2021-12-14 | 电子科技大学 | Mixed-mode boost converter suitable for battery voltage supply |
| CN114640253A (en) * | 2022-03-24 | 2022-06-17 | 苏州罗约科技有限公司 | Hybrid three-level flying capacitor Boost circuit |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114514680A (en) | 2020-09-14 | 2022-05-17 | 华为技术有限公司 | DC/DC power converter, method for controlling switching of a DC/DC power converter, DC/DC power converter arrangement, and system |
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| DE102012107122A1 (en) * | 2011-08-08 | 2013-02-14 | Sma Solar Technology Ag | Inverter circuit for use in e.g. single-phase inverter to convert electrical energy of photovoltaic generator into alternating current power supply, has controller clocking switches of inverter sub circuits to form alternating current |
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| DE102016222001A1 (en) * | 2016-11-09 | 2018-05-09 | Vincotech Gmbh | ACTIVE THREE-LEVEL NPC MOVEMENT MODULE |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113746322A (en) * | 2021-09-27 | 2021-12-03 | 电子科技大学 | Mixed-mode high-efficiency boost converter |
| CN113783429A (en) * | 2021-09-27 | 2021-12-10 | 电子科技大学 | Hybrid DC-DC boost converter |
| CN113783428A (en) * | 2021-09-27 | 2021-12-10 | 电子科技大学 | Mixed-mode boost converter |
| CN113794374A (en) * | 2021-09-27 | 2021-12-14 | 电子科技大学 | Mixed-mode boost converter suitable for battery voltage supply |
| CN113783429B (en) * | 2021-09-27 | 2023-03-31 | 电子科技大学 | Hybrid DC-DC boost converter |
| CN113794374B (en) * | 2021-09-27 | 2023-03-31 | 电子科技大学 | Mixed-mode boost converter suitable for battery voltage supply |
| CN113746322B (en) * | 2021-09-27 | 2023-03-31 | 电子科技大学 | Mixed-mode high-efficiency boost converter |
| CN113783428B (en) * | 2021-09-27 | 2023-03-31 | 电子科技大学 | Mixed-mode boost converter |
| CN114640253A (en) * | 2022-03-24 | 2022-06-17 | 苏州罗约科技有限公司 | Hybrid three-level flying capacitor Boost circuit |
| CN114640253B (en) * | 2022-03-24 | 2023-03-14 | 苏州罗约科技有限公司 | Hybrid three-level flying capacitor Boost circuit |
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