WO2014208232A1 - マルチレベル電力変換装置 - Google Patents
マルチレベル電力変換装置 Download PDFInfo
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- WO2014208232A1 WO2014208232A1 PCT/JP2014/063717 JP2014063717W WO2014208232A1 WO 2014208232 A1 WO2014208232 A1 WO 2014208232A1 JP 2014063717 W JP2014063717 W JP 2014063717W WO 2014208232 A1 WO2014208232 A1 WO 2014208232A1
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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
- H02M7/4835—Converters with outputs that each can have more than two voltages levels comprising two or more cells, each including a switchable capacitor, the capacitors having a nominal charge voltage which corresponds to a given fraction of the input voltage, and the capacitors being selectively connected in series to determine the instantaneous output voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
-
- 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
- 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
-
- 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
-
- 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
-
- 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
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
-
- 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
Definitions
- the present invention relates to a multi-level power converter for high voltage and large capacity.
- the power conversion device includes a main circuit switching element which is a semiconductor element (a module in which a diode is connected in antiparallel with a semiconductor switching element such as an IGBT: the same applies hereinafter).
- a main circuit switching element which is a semiconductor element (a module in which a diode is connected in antiparallel with a semiconductor switching element such as an IGBT: the same applies hereinafter).
- the circuit configuration shown in FIG. 27 has a problem in that there are combinations of output voltages that cannot be output because the capacitors and some of the semiconductor elements S1 to S4 are common to three phases. Specifically, if the phase voltages of 2E, 0, and -2E are output from the output terminals U, V, and W, respectively, the flying capacitor FC1 is short-circuited. Therefore, a combination of these phase voltages must be output. I could not.
- FIG. 28 shows an example in which the U phase is 2E, the V phase is 0, and the W phase is ⁇ 2E. Further, in FIG. 28, a circle represents a semiconductor element that is conducting.
- the circuit configuration shown in FIG. 27 cannot select the semiconductor element to be conducted as shown in FIG. 28, and cannot output 2E, 0, and ⁇ 2E voltages at the same time.
- the voltages of 2E, 0, and ⁇ 2E cannot be simultaneously output from the output terminals U, V, and W, respectively, so that they are replaced by simulating with combinations of other output voltages.
- the outputs 2U, E, -2E and 2E, -E, -2E are repeatedly output from the output terminals U, V, W, respectively, and the voltages 2E, 0, -2E are output on average. ing.
- the present invention has been devised in view of the above-described conventional problems, and one aspect thereof is a multi-level power converter that generates an AC output converted from a voltage of a DC voltage source and a flying capacitor into a plurality of voltage levels.
- N DC voltage sources connected in series (N ⁇ 2), first to fourth semiconductor elements sequentially connected in series between the positive and negative electrodes of the N DC voltage sources,
- An M phase (M ⁇ ) having a fifth semiconductor element having one end connected to the common connection point of the second semiconductor element and a sixth semiconductor element having one end connected to the common connection point of the third and fourth semiconductor elements.
- a basic circuit having connected M-phase second to fourth semiconductor elements and an M-phase sixth semiconductor element having one end connected to a common connection point of the odd-numbered third and fourth semiconductor elements;
- the M-phase common even-numbered flying capacitor interposed between the common connection points of all the fifth semiconductor elements and the third and fourth semiconductor elements in the even-numbered stages, and the common of the first and second semiconductor elements in the odd-numbered stages
- An odd-numbered flying capacitor common to the M phase inserted between the connection point and all the sixth semiconductor elements and a common connection point of the second and third semiconductor elements of each basic circuit are used as input terminals.
- M-phase voltage selection circuit for outputting the potential of any one of the input terminals from the output terminal by selectively turning on and off the semiconductor element between the output terminal and the semiconductor element. And.
- the second and third semiconductor elements sequentially connected in series to the positive terminals of the even-numbered DC voltage sources among the N DC voltage sources connected in series, and the N DC power sources connected in series
- An M-phase (M ⁇ 3) basic circuit having third and second semiconductor elements sequentially connected in series to the negative ends of the odd-numbered DC voltage sources of the DC voltage sources;
- An M-phase common flying capacitor connected in parallel to each of the second and third semiconductor elements; a common connection point of the second and third semiconductor elements of the basic circuit; Common to positive terminal of DC voltage source
- the connection point is an input terminal, and a semiconductor element is provided between the input terminal and the output terminal.
- a sixth semiconductor element having one end connected to the connection point; first to third semiconductor elements sequentially connected in series between the positive and negative electrodes of an odd-numbered DC voltage source among N DC voltage sources connected in series; A basic circuit of M phase (M ⁇ 3) having a fifth semiconductor element having one end connected to a common connection point of the odd-numbered first and second semiconductor elements, and all sixth circuits in the even-numbered stage.
- An M-phase voltage selection circuit that has a semiconductor element between the output terminals and selectively controls ON / OFF of the semiconductor element to output the potential of any one of the input terminals from the output terminal; , Provided.
- a fifth semiconductor element having one end connected to a common connection point of the second semiconductor elements, and a series connected in series between the positive and negative electrodes of an odd-numbered DC voltage source among N DC voltage sources connected in series.
- An M-phase (M ⁇ 3) basic circuit having two to fourth semiconductor elements and a sixth semiconductor element having one end connected to a common connection point of the odd-numbered third and fourth semiconductor elements;
- the odd-numbered flying capacitor common to the M phase interposed between the positive terminal of the DC voltage source of the odd-numbered stage and the common connection point of the second semiconductor element, and the common of the second and third semiconductor elements of the basic circuit
- the connection point is an input terminal, each of which has a semiconductor element between the input terminal and the output terminal. By selectively ON / OFF controlling this semiconductor element, the potential of any one of the input terminals is output to the output terminal.
- an M-phase voltage selection circuit that outputs the output of the M-phase.
- some or all of the semiconductor elements of the basic circuit and the voltage selection circuit may have a series number of two or more.
- some or all of the semiconductor elements of the basic circuit and the voltage selection circuit may have a parallel number of two or more.
- a multi-phase multi-level power conversion device it is an object to simplify control for outputting an arbitrary voltage level from all phases while outputting an arbitrary voltage level from all phases.
- FIG. 10 is a circuit configuration diagram showing a basic cell in a sixth embodiment. It is a circuit block diagram which shows the multilevel power converter device in Embodiment 6.
- FIG. 10 is a diagram illustrating an operation example for each output voltage in the sixth embodiment. It is a figure which shows the operation example of the multilevel power converter device in Embodiment 6.
- FIG. 10 is a circuit configuration diagram illustrating a multilevel power conversion device according to a seventh embodiment.
- FIG. 10 is a diagram illustrating an operation example of a multilevel power conversion device according to a seventh embodiment.
- FIG. 10 is a circuit configuration diagram illustrating a multilevel power conversion device according to an eighth embodiment.
- FIG. 10 is a diagram illustrating an operation example of a multilevel power conversion device according to an eighth embodiment.
- FIG. 10 is a circuit configuration diagram illustrating a multilevel power conversion device according to a ninth embodiment. It is a figure which shows the operation example of the multilevel power converter device in Embodiment 9.
- FIG. 10 is a circuit configuration diagram illustrating a multilevel power conversion device according to a twelfth embodiment.
- FIG. 22 is a diagram illustrating an operation example of the multilevel power conversion device according to the twelfth embodiment.
- FIG. 1 is a circuit diagram showing a basic cell used in a multilevel power conversion device according to the present invention.
- the basic cell includes six semiconductor elements SN. 1 to SN. 6 (for example, a module in which a diode is connected in antiparallel with a semiconductor switch element such as an IGBT: the same applies hereinafter).
- the terminal 3 is connected to the positive side of a DC voltage source (DC capacitor or DC power source), and the terminal 1 is connected to the negative side of the DC voltage source.
- the terminal 2 ' is connected to the positive side of the flying capacitor (or DC voltage source), and the terminal 2 "is connected to the negative side of the flying capacitor.
- the semiconductor element SN. 1 to SN. 4 are sequentially connected in series. Further, the terminal 2 'and the semiconductor element SN. 1, SN. 2 between the two common connection points. 5 is inserted, and the semiconductor element SN.6 is inserted between the terminal 2 ′′ and the common connection point of the semiconductor elements SN.3 and SN.4.
- the common connection point is terminal 2.
- FIG. 2 shows a basic circuit in which N basic cells shown in FIG. 1 are connected in series. Here, N ⁇ 2.
- the voltage selection circuit uses the terminals (2,..., 2N,) of the basic circuit as input terminals, and selects which potential of the input terminals is output from the output terminal.
- the voltage selection circuit is configured by (a), (b), (c), (d) in FIG. 3 or a combination thereof.
- Semiconductor elements S1 to S28 are provided between the input terminals and the output terminals. By selectively turning on the semiconductor elements S1 to S28, the input terminals (2N_3, 2 (N ⁇ 1 in (a)) are provided.
- FIG. 4 is a schematic diagram illustrating a configuration of the multilevel power conversion device according to the first embodiment.
- the multilevel power conversion device according to the first embodiment is an M-phase N-stage multilevel power conversion device configured using the basic circuit shown in FIG. 2 and the voltage selection circuit shown in FIG. is there. N ⁇ 2 and M ⁇ 3.
- Each of the phase modules 11 to 1M includes a combination of a basic circuit and a voltage selection circuit.
- the configurations of the basic circuit and the voltage selection circuit are the same as those shown in FIGS. 2 and 3, and a description thereof will be omitted here.
- N DC voltage sources DCC1 to DCCN are connected in series between both end terminals 1 and 2N + 1 of the phase modules 11 to 1M, and terminals 3,..., 2N ⁇ 1 of the phase modules 11 to 1M (basic circuit) are respectively connected. Common connection points of the DC voltage sources DCC1 to DCCN are connected.
- N flying capacitors FC1 to FCN are connected to the terminals 2 ′′, 2 ′,..., 2N ′′, 2N ′ of the phase modules 11 to 1M.
- a voltage of 2pE can be output from 2p + 1.
- the terminals 1, 2 ′′, 2 ′, 3,..., 2N ⁇ 1, 2N ′′, 2N ′, 2N + 1 are input to the phase modules 11 to 1M, respectively.
- the semiconductor elements S1.1, S1.2, S1.3, S1.4 to SN. 1, SN. 2, SN. 3, SN. 4 is selectively turned ON to set the potential of any one of the terminals 1, 2 ′′, 2 ′, 3,..., 2N ⁇ 1, 2N ′′, 2N ′, 2N + 1 to the terminals 2,.
- the multilevel power conversion device according to the second embodiment includes the first semiconductor elements S2.1 to SN.1 in the even-numbered basic cells of the basic circuit shown in FIG. 1 is common to the M phase, and the fifth semiconductor elements S2.5 to SN.
- the fourth semiconductor elements S1.4 to SN-1.4 are shared by the M phase
- the sixth semiconductor elements S1.6 to SN-1.6 are In this configuration, the omitted circuit is connected in N stages.
- the multilevel power conversion device according to the second embodiment has M phases and N stages, where N is an even number of 2 or more and M ⁇ 3. Other configurations are the same as those of the first embodiment.
- a voltage of (2N + 1) level can be output from the output terminals OUT1 to OUTM.
- the multilevel power conversion device of the second embodiment it becomes possible to output an arbitrary phase voltage level and control for outputting an arbitrary phase voltage level as compared with the conventional circuit configuration shown in FIG. Becomes easy. Further, the number of semiconductor elements can be reduced as compared with the first embodiment.
- the multilevel power conversion device according to the third embodiment includes fourth semiconductor elements S2.4 to SN.4 in the even-numbered basic cells of the basic circuit shown in FIG. 4 is common to the M phase, and the sixth semiconductor elements S2.6 to SN. And a circuit in which the first semiconductor elements S1.1 to SN-1.1 are common to the M phase and the fifth semiconductor elements S1.5 to SN-1.5 are omitted in the basic cells in the odd stages. Are connected in N stages. Note that the multilevel power conversion device according to the third embodiment has M phases and N stages, where N is an even number of 2 or more and M ⁇ 3. Other configurations are the same as those of the first embodiment.
- a voltage of (2N + 1) level can be output to the output terminals OUT1 to OUTM.
- the fourth embodiment is different from the first embodiment in the multilevel power conversion device of the second embodiment in that the first semiconductor elements S2.1 to SN. 1 and the odd-numbered fourth semiconductor elements S1.4 to SN-1.4 that are common to the M phase are omitted. That is, in FIG. 7, the semiconductor elements connected to the terminals 1, 5, 2N-3, 2N + 1 are omitted. Other configurations are the same as those of the second embodiment. N is an even number of 2 or more, and M ⁇ 3.
- a voltage of (2N + 1) level can be output to the output terminals OUT1 to OUTM.
- the multilevel power conversion device of the fourth embodiment it is possible to output an arbitrary phase voltage level and control for outputting an arbitrary phase level as compared with the conventional circuit configuration shown in FIG. It becomes easy.
- the number of semiconductor elements can be reduced as compared with the second embodiment.
- the fifth embodiment includes fourth semiconductor elements S2.4 to SN.4 of even-numbered basic cells common to M phases. 4 and the first semiconductor elements S1.1 to SN-1.1 of the odd-numbered basic cells are omitted. That is, in FIG. 8, the semiconductor element connected to the terminals 3 and 2N-1 is omitted.
- N is an even number of 2 or more, and M ⁇ 3.
- a voltage of (2N + 1) level can be output from the output terminals OUT1 to OUTM.
- the multilevel power conversion device of the fifth embodiment it is possible to output an arbitrary phase voltage level and control for outputting an arbitrary phase level as compared with the conventional circuit configuration shown in FIG. It becomes easy.
- the number of semiconductor elements can be reduced as compared with the third embodiment.
- DC voltage source DCC1 flying capacitor FC1
- U-phase semiconductor element SUN. 1 to SUN. 6 V-phase semiconductor element SVN. 1 to SVN. 6
- W-phase semiconductor element SWN. 1 to SWN. 6 is composed.
- the U-phase basic circuit includes first to fourth semiconductor elements SU1.1 to SU1.4 and SU2.1 to SU2 that are sequentially connected in series between the positive and negative electrodes of two DC voltage sources DCC1 and DCC2. .4, fifth semiconductor elements SU1.5, SU2.5 having one end connected to a common connection point of the first and second semiconductor elements SU1.1, SU1.2, SU2.1, SU2.2, 3 and 4th semiconductor element SU1.3, SU1.4, SU2.3, SU2, and 6th semiconductor element SU1.6, SU2.6 by which one end was connected to the common connection point.
- the flying capacitors FC1 and FC2 include the other ends of the fifth semiconductor elements SU1.5, SV1.5, SW1.5, SU2.5, SV2.5, SW2.5 and the sixth semiconductor elements SU1.6, SV1.6, It is inserted between the other ends of SW 1.6, SU 2.6, SV 2.6, and SW 2.6.
- the U-phase voltage selection circuit is composed of SU1 to SU4. The same applies to the V phase and the W phase.
- U, V and W represent output terminals.
- a circuit in which each semiconductor element is configured in two or more series for resistance to high voltage is included, and a circuit in which each semiconductor element is configured in two or more in parallel for resistance to large current is also included.
- the two series semiconductor elements of the semiconductor elements SU1 and SU2 in FIG. 10 may be replaced with one semiconductor element.
- This circuit shares the flying capacitors FC1 and FC2 in three phases and can output a five-level phase voltage.
- Table 1 shows typical switching patterns for the U phase. By switching the semiconductor elements in the pattern shown in Table 1, it is possible to output five levels of voltages 2E, E, 0, -E, and -2E through the path shown in FIG. Table 1 and FIG. 11 are examples, and other patterns may be used.
- a circle in FIG. 12 represents a semiconductor element in conduction.
- the semiconductor elements SU1.5, SV1.5, SW1.5, SU1.6, SV1.6, SW1.6 are connected to both ends of the flying capacitor FC1, and the semiconductor elements are connected to both ends of the flying capacitor FC2.
- the flying capacitors FC1 and FC2 can be operated without being short-circuited.
- phase voltages 2E, 0, and -2E that cannot be output with the conventional circuit configuration shown in FIG. 27 can be output, and the control for outputting 2E, 0, and -2E can be simplified.
- the semiconductor elements SW2.1, SW2.2, SW1 Since the potential of the collector terminal of the semiconductor element SW2.1 is 2E and the potential of the output terminal W (that is, the potential of the emitter terminal of the semiconductor element SW2) is ⁇ 2E, the semiconductor elements SW2.1, SW2.2, SW1, The potential at the common connection point between the semiconductor elements SW2.2 and SW1 becomes 0 by the voltage division due to the impedance of SW2. Therefore, the applied voltage of the series connection circuit of the semiconductor elements SW1 and SW2 is 2E. The reference point for each potential is the 0 terminal in FIG. This condition is a condition that the applied voltage between the series circuits of the semiconductor elements SW2.1, SW2.2, SW1, and SW2 is maximized (4E).
- the maximum value of the applied voltage of the series connection circuit of the semiconductor elements SW1 and SW2 in the steady state is 2E.
- the conventional circuit of FIG. 29A has a mode in which the voltage at the terminal W0 is E and the voltage at the output terminal OUT_W is ⁇ 2E depending on the ON / OFF state of the switching element. At this time, an applied voltage of 3E is applied to the switching element SW5.
- 29B has a mode in which the voltage at the terminal W0 is E and the voltage at the output terminal OUT_W is ⁇ 2E depending on the ON / OFF state of the switching element. At this time, an applied voltage of 3E is applied to the switching element SW5.
- the sixth embodiment has an advantage that the withstand voltage of the semiconductor element directly connected to the output terminal may be lower than that of the conventional circuit of FIGS. 29 (a) and 29 (b).
- the three-phase output circuit has been described.
- the phase voltage of each phase can be independently set without short-circuiting the flying capacitors FC1 and FC2. Output is possible. The same is true for the superiority of the withstand voltage of the semiconductor element and the superiority of the absence of the semiconductor element through which current for three phases flows, as compared with the conventional circuit shown in FIGS. 29 (a) and 29 (b).
- the basic circuit includes, among the two DC voltage sources DCC1 and DCC2 connected in series, a fourth semiconductor element S2.4 common to three phases, one end of which is connected to the negative electrode end of the DC voltage source DCC2 of the even number stage.
- Three-phase first to third semiconductor elements SU2.1 to SU2.3 sequentially connected in series between the positive end of the even-numbered DC voltage source DCC2 and the other end of the even-numbered fourth semiconductor element S2.4.
- SV2.1 to SV2.3, SW2.1 to SW2.3 and even-numbered first and second semiconductor elements SU2.1, SU2.2, SV2.1, SV2.2, SW2.1, SW2.
- First common terminal having one end connected to the positive terminal of the fifth-stage semiconductor element SU2.5, SV2.5, SW2.5 having one end connected to the two common connection points and the DC voltage source DCC1 of the odd-numbered stage.
- a sixth semiconductor having one end connected to a common connection point of the third and fourth semiconductor elements SU1.3, SU1.4, SV1.3, SV1.4, SW1.3, SW1.4 in odd stages
- Elements SU1.6, SV1.6, and SW1.6 are included.
- the flying capacitor FC2 is common to all the fifth semiconductor elements SU2.5, SV2.5, and SW2.5 and the third and fourth semiconductor elements SU2.3, SV2.3, SW2.3, and SU2.4 in even stages.
- the flying capacitor FC1 is interposed between the connection points, and the flying capacitor FC1 is connected to the common connection point of the first and second semiconductor elements S1.1, SU1.2, SV1.2, SW1.2 and all the sixth semiconductor elements SU1 in odd stages. .6, SV1.6, and SW1.6.
- the voltage selection circuit is composed of SU1 to SU4, SV1 to SV4, SW1 to SW4.
- each semiconductor element includes a circuit in which each semiconductor element is configured in two or more series in order to withstand a high voltage. Also included is a circuit in which each semiconductor element is configured in parallel with two or more in order to withstand a large current.
- the two semiconductor elements SU1 and SU2 connected in series shown in FIG. 13 may be replaced with one semiconductor element.
- phase voltages 2E, 0, and -2E that could not be output by the conventional circuit shown in FIG. 27 can be output. This is shown in FIG. In FIG. 14, a circle represents a semiconductor element that is conducting.
- the semiconductor elements SU2.5, SV2.5, and SW2.5 are connected to the flying capacitor FC2
- the semiconductor elements SU1.6, SV1.6, and SW1.6 are connected to the flying capacitor FC1
- the flying capacitor 2E, 0, -2E can be output without short-circuiting FC1 and FC2, and the control for outputting 2E, 0, -2E can be simplified.
- the series connection circuit of the semiconductor elements SW1 and SW2 in the steady state as in the sixth embodiment.
- the maximum value of the applied voltage is 2E. The same applies to the semiconductor elements SU1, SU2, SV1, SV2, SW1, SW2, SU3, SU4, SV3, SV4, SW3, and SW4.
- the three-phase output circuit has been described.
- the phase voltage of each phase can be independently set without short-circuiting the flying capacitors FC1 and FC2. Output is possible. The same applies to the superiority of the withstand voltage of the semiconductor element compared with the conventional circuit shown in FIGS. 29 (a) and 29 (b).
- FIG. 15 is a circuit configuration diagram showing the multilevel power conversion device according to the eighth embodiment.
- U, V, and W represent output terminals.
- the basic circuit includes a three-phase common first semiconductor element S2.1 having one end connected to the positive terminal of an even-stage DC voltage source DCC2 out of two DC voltage sources DCC1 and DCC2 connected in series, Three-phase second to fourth semiconductor elements SU2.2a to SU2... Are sequentially connected in series between the other end of the even-numbered first semiconductor element S2.1 and the negative electrode end of the even-numbered DC voltage source DCC2.
- the flying capacitor FC2 includes common connection points of the first and second semiconductor elements S2.1, SU2.2a, SV2.2a, and SW2.2a in the even stages and the sixth semiconductor elements SU2.6 in all phases in the even stages.
- the flying capacitor FC1 is interposed between the other ends of SV2.6 and SW2.6, and the flying capacitor FC1 is connected to the other ends of the fifth semiconductor elements SU1.5, SV1.5, and SW1.5 of all phases in the odd-numbered stages. It is inserted between the third and fourth semiconductor elements SU1.3b, SV1.3b, SW1.3b, S1.4 in the stage.
- the voltage selection circuit includes semiconductor elements SU1 to SU4, SV1 to SV4, SW1 to SW4.
- the fifth semiconductor elements SU1.5, SV1.5, and SW1.5 are connected to the flying capacitor FC1
- the sixth semiconductor elements SU2.6, SV2.6, and SW2.6 are connected to the flying capacitor FC2. Therefore, 2E, 0, -2E can be output from the output terminals U, V, W without short-circuiting the flying capacitors FC1, FC2, and the control for outputting 2E, 0, -2E can be simplified. it can.
- each semiconductor element is configured in two or more series for resistance to high voltage is also included. Also included is a circuit in which each semiconductor element is configured in parallel with two or more in order to withstand a large current. Further, if the withstand voltage of the semiconductor element is suitable, the two series semiconductor elements SU1.3a and SU1.3b in FIG. 15 may be replaced with one semiconductor element.
- the semiconductor elements SV1.3a and SV1.3b, SW1.3a and SW1.3b, SU2.2a and SU2.2b, SV2.2a and SV2.2b, SW2.2a and SW2.2b, SU1 and SU2, and SV1 The same applies to SV2, SW1 and SW2, SU3 and SU4, SV3 and SV4, SW3 and SW4.
- the series connection circuit of the semiconductor elements SW1 and SW2 at the time of steady state as in the sixth embodiment is 2E.
- the three-phase output circuit has been described.
- the phase voltage of each phase is independent without short-circuiting the flying capacitors FC1 and FC2. Can be output.
- the superiority of the withstand voltage of the semiconductor element as compared with the conventional circuit shown in FIGS. 29 (a) and 29 (b).
- the basic circuit includes second to fourth semiconductor elements SU2.2 to SU2.4, which are sequentially connected in series to the positive ends of even-numbered DC voltage sources DCC2 out of two DC voltage sources DCC1 and DCC2 connected in series. SV2.2 to SV2.4, SW2.2 to SW2.4, and a third connected in series to the negative end of the odd-numbered DC voltage source DCC1 among the two DC voltage sources DCC1 and DCC2 connected in series. First semiconductor elements SU1.3 to SU1.1, SV1.3 to SV1.1, SW1.3 to SW1.1.
- the flying capacitor FC1 is connected in parallel to the odd-numbered second and third semiconductor elements SU1.3, SU1.2, SV1.3, SV1.2, SW1.3, SW1.2, and the flying capacitor FC2 is an even-numbered stage.
- the second and third semiconductor elements SU2.2, SU2.3, SV2.2, SV2.3, SW2.2, and SW2.3 are connected in parallel.
- the fifth semiconductor elements SU1.5, SV1.5, and SW1.5 are interposed between the flying capacitor FC1 and the second semiconductor elements SU1.2, SV1.2, and SW1.2 in the odd-numbered stages, so that the flying Sixth semiconductor elements SU2.6, SV2.6, and SW2.6 are interposed between capacitor FC2 and third semiconductor elements SU2.3, SV2.3, and SW2.3 at even stages.
- first semiconductor elements SU1.1, SV1.1, SW1.1 are inserted between the second semiconductor elements SU1.2, SV1.2, SW1.2 and the 0 terminal in the odd-numbered stages, and the even number
- fourth semiconductor elements SU2.4, SV2.4, and SW2.4 are interposed between the third semiconductor elements SU2.3, SV2.3, SW2.3 and the 0 terminal in the stage.
- the voltage selection circuit is composed of SU1, SU3, SV1, SV3, SW1, and SW3.
- each semiconductor element is configured in two or more series in order to withstand a high voltage. Also included is a circuit in which each semiconductor element is configured in parallel with two or more in order to withstand a large current.
- a circle in FIG. 18 represents a semiconductor element that is conducting.
- the semiconductor elements SU1.5, SV1.5, and SW1.5 are connected to the flying capacitor FC1
- the semiconductor elements SU2.6, SV2.6, and SW2.6 are connected to the flying capacitor FC2
- the flying capacitor Without short-circuiting FC1 and FC2 the voltages of 2E, 0, and -2E can be output from the output terminals U, V, and W, respectively, and the control for outputting 2E, 0, and -2E is simplified. be able to.
- the maximum value of the applied voltage of the semiconductor element SW1 at the time of steady state is 2E as in the sixth embodiment.
- the phase voltage of each phase is independent of the circuit in which the number of output phases is increased to four or more without short-circuiting the flying capacitors FC1 and FC2. Can be output.
- the superiority of the withstand voltage of the semiconductor element as compared with the conventional circuit shown in FIGS. 29A and 29B, and the superiority of the absence of the semiconductor element through which current for three phases flows.
- U, V, and W represent output terminals.
- FIG. 3B is used as the voltage selection circuit.
- the basic circuit includes second and third semiconductor elements SU2.2, SU2.3, which are sequentially connected in series to the positive ends of even-numbered DC voltage sources DCC2 out of two DC voltage sources DCC1, DCC2 connected in series. SV2.2, SV2.3, SW2.2, SW2.3 and a third connected in series to the negative terminal of the odd-numbered DC voltage source DCC1 among the two DC voltage sources DCC1, DCC2 connected in series. , Second semiconductor elements SU1.3, SU1.2, SV1.3, SV1.2, SW1.3, SW1.2.
- the flying capacitor FC1 is connected in parallel to the odd-numbered second and third semiconductor elements SU1.2, SU1.3, SV1.2, SV1.3, SW1.2, and SW1.3.
- the flying capacitor FC2 is connected in parallel to the even-numbered second and third semiconductor elements SU2.2, SU2.3, SV2.2, SV2.3, SW2.2, and SW2.3.
- the voltage selection circuit includes SU7, SU8, SU11, SU12, SV7, SV8, SV11, SV12, SW7, SW8, SW11, SW12.
- each semiconductor element is configured in two or more series in order to withstand a high voltage. Also included is a circuit in which each semiconductor element is configured in two or more in order to withstand a large current.
- a circle in FIG. 20 represents a semiconductor element in conduction.
- the voltages of 2E, 0, and -2E can be output from the output terminals U, V, and W, and the control for outputting 2E, 0, and -2E can be simplified.
- the tenth embodiment differs from the conventional circuit shown in FIGS. 29A and 29B in that there is no semiconductor element through which currents for three phases of the U phase, the V phase, and the W phase flow. Therefore, a cooling fin having a high cooling effect is not necessary.
- the phase voltage of each phase can be made independent of the circuit in which the number of output phases is increased to four or more without short-circuiting the flying capacitors FC1 and FC2. Can be output. Compared with the conventional circuit shown in FIGS. 29 (a) and 29 (b), the same is true for the advantage that there is no semiconductor element through which current for three phases flows.
- FIG. 3C is used as the voltage selection circuit.
- the basic circuit includes second and third semiconductor elements SU2.2, SU2.3, which are sequentially connected in series to the positive ends of even-numbered DC voltage sources DCC2 out of two DC voltage sources DCC1, DCC2 connected in series. SV2.2, SV2.3, SW2.2, SW2.3 and a third connected in series to the negative terminal of the odd-numbered DC voltage source DCC1 among the two DC voltage sources DCC1, DCC2 connected in series. , Second semiconductor elements SU1.3, SU1.2, SV1.3, SV1.2, SW1.3, SW1.2.
- the flying capacitor FC1 is connected in parallel to the odd-numbered second and third semiconductor elements SU1.2, SU1.3, SV1.2, SV1.3, SW1.2, and SW1.3.
- the flying capacitor FC2 is connected in parallel to the even-numbered second and third semiconductor elements SU2.2, SU2.3, SV2.2, SV2.3, SW2.2, and SW2.3.
- the voltage selection circuit includes diodes DU1, DU2, DV1, DV2, DW1, DW2, SU12 to SU15, SV12 to SV15, and SW12 to SW15.
- the output terminals U, V, and W can be changed to 5E voltages of 2E, E, 0, -E, and -2E. Can output.
- each semiconductor element includes a circuit in which each semiconductor element is configured in two or more series in order to withstand a high voltage. Also included is a circuit in which each semiconductor element is configured in two or more in order to withstand a large current.
- a circle represents a semiconductor element that is conducting.
- the flying capacitors FC1 and FC2 are connected. Without short-circuiting, the voltages of 2E, 0, and -2E can be output from the output terminals U, V, and W, respectively, and the control for outputting 2E, 0, and -2E can be simplified.
- the eleventh embodiment is different from the conventional circuit shown in FIGS. 29A and 29B in that there is no semiconductor element through which currents for three phases of the U phase, the V phase, and the W phase flow. Therefore, a cooling fin having a high cooling effect is not necessary.
- the three-phase output circuit has been described.
- the phase voltage of each phase can be independently set without short-circuiting the flying capacitors FC1 and FC2. Output is possible.
- the same is true for the advantage that there is no semiconductor element through which current for three phases flows.
- the voltage selection circuit uses FIG.
- the fifth semiconductor element SU2.5, SV2.5, SW2.5 having one end connected to the connection point, and the positive and negative electrodes of the odd-numbered DC voltage source DCC1 among the two DC voltage sources DCC1, DCC2 connected in series Second to fourth semiconductor elements SU1.2 to SU1.4, SV1.2 to SV1.4, SW1.2 to SW1.4, which are sequentially connected in series, and the odd-numbered third and fourth semiconductor elements SU1.3, SU1.4, SV1.3, SV .4, SW1.3, sixth semiconductor device SU1.6 having one end connected to the common connection point of the SW1.4, SV1.6, having a SW1.6,.
- the flying capacitor FC2 includes the other ends of all the fifth semiconductor elements SU2.5, SV2.5, and SW2.5 in the even stages, the negative terminal of the DC voltage source DCC2 in the even stages, and the third semiconductor elements SU2.3 and SV2. .3, SW2.3, and the flying capacitor FC1 is connected to the other end of the sixth semiconductor elements SU1.6, SV1.6, SW1.6 in the odd-numbered stages and the DC voltage in the odd-numbered stages. It is inserted between the positive terminal of the source DCC1 and the common connection point of the second semiconductor elements SU1.2, SV1.2, and SW1.2.
- the voltage selection circuit is composed of SU14, SU15, SV14, SV15, SW14, and SW15.
- the output terminals U, V, and W can be changed to 5E voltages of 2E, E, 0, -E, and -2E. Can output.
- each semiconductor element includes a circuit in which each semiconductor element is configured in two or more series in order to withstand a high voltage. Also included is a circuit in which each semiconductor element is configured in two or more in order to withstand a large current.
- ⁇ represents a semiconductor element that is conducting.
- the sixth semiconductor elements SU1.6, SV1.6, and SW1.6 are connected to the flying capacitor FC1
- the fifth semiconductor elements SU2.5, SV2.5, and SW2.5 are connected to the flying capacitor FC2.
- the voltages of 2E, 0, and -2E can be output from the output terminals U, V, and W without short-circuiting the flying capacitors FC1 and FC2, respectively, and the control for outputting 2E, 0, and -2E is simplified. be able to.
- the twelfth embodiment has no semiconductor element through which current for three phases of the U phase, the V phase, and the W phase flows. It is possible to reduce the size of the cooling fin.
- the three-phase output circuit has been described.
- the phase voltage of each phase is independent without short-circuiting the flying capacitors FC1 and FC2.
- Can be output Compared with the conventional circuit shown in FIGS. 29 (a) and 29 (b), the same is true for the advantage that there is no semiconductor element through which current for three phases flows.
- the voltage selection circuit uses FIG. 3 (a) and FIG. 3 (d).
- the basic circuit includes second and third semiconductor elements SU2.2, SU2,... That are sequentially connected in series to the positive terminals of even-numbered DC voltage sources DCC2 and DCC4 among four DC voltage sources DCC1 to DCC4 connected in series. 3, SV2.2, SV2.3, SW2.2, SW2.3, SU4.2, SU4.3, SV4.2, SV4.3, SW4.2, SW4.3, and four connected in series Third and second semiconductor elements SU1.3, SU1.2, SV1.3, SV1.2, SW1 sequentially connected in series to the negative ends of the odd-numbered DC voltage sources DCC1, DCC3 among the DC voltage sources DCC1 to DCC4. .3, SW1.2, SU3.3, SU3.2, SV3.3, SV3.2, SW3.3, and SW3.2.
- the flying capacitors FC1 to FC4 include odd-numbered and even-numbered second and third semiconductor elements SU2.2, SU2.3, SV2.2, SV2.3, SW2.2, SW2.3, SU4.2, SU4. 3, SV4.2, SV4.3, SW4.2, SW4.3, SU1.3, SU1.2, SV1.3, SV1.2, SW1.3, SW1.2, SU3.3, SU3.2, It is connected in parallel to SV3.3, SV3.2, SW3.3, SW3.2.
- the voltage selection circuit includes SU19 to SU28, SV19 to SV28, and SW19 to SW28.
- Table 2 shows the voltage between the U terminal and the 0 terminal when each semiconductor element in the U phase is in the ON / OFF state.
- any voltage (4E, 3E, 2E, E, 0, ⁇ E, ⁇ 2E, ⁇ 3E, ⁇ 4E) can be output from the output terminals U, V, W, respectively, and the control for outputting 4E, 3E, 2E, E, 0, -E, -2E, -3E, -4E is simplified. be able to.
- the thirteenth embodiment has no semiconductor element in which currents for three phases of the U phase, the V phase, and the W phase flow as compared with the conventional circuit shown in FIGS. 29A and 29B. It becomes possible to reduce the size of the cooling fin for cooling.
- the three-phase output circuit has been described. However, even in a circuit in which the number of output phases is increased to four or more, the phase voltage of each phase is independent without short-circuiting the flying capacitors FC1 to FC4. Can be output. Compared with the conventional circuit shown in FIGS. 29 (a) and 29 (b), the same is true for the advantage that there is no semiconductor element through which current for three phases flows.
- the voltage selection circuit uses FIG.
- fourth semiconductor elements SU2.4 and SU4.4 that are common to three phases and that have one end connected to the negative electrode ends of the DC voltage sources DCC2 and DCC4 in even stages.
- the three-phase first to third semiconductors sequentially connected in series between the positive ends of the even-numbered DC voltage sources DCC2 and DCC4 and the other ends of the even-numbered fourth semiconductor elements SU2.4 and SU4.4.
- the flying capacitors FC2 and FC4 include all the fifth semiconductor elements SU2.5, SV2.5, SW2.5, SU4.5, SV4.5, SW4.5 and the third and fourth semiconductor elements SU2.3 in the even stages. , SV2.3, SW2.3, SU2.4, SU4.3, SV4.3, SW4.3, SU4.4, and the flying capacitors FC1, FC3 are connected in the odd stages. 1 and 2 semiconductor elements SU1.1, SU1.2, SV1.2, SW1.2, SU3.1, SU3.2, SV3.2, and SW3.2 and all sixth semiconductor elements SU1.6. , SV1.6, SW1.6, SU3.6, SV3.6, and SW3.6.
- the voltage selection circuit includes SU1 to SU12, SV1 to SV12, and SW1 to SW12.
- an arbitrary voltage (4E, 3E, 2E, E, 0, ⁇ E, ⁇ 2E, ⁇ 3E, ⁇ 4E) is obtained without short-circuiting the flying capacitors FC1 to FC4.
- the circuit of FIG. 26 has a configuration in which the circuit of FIG.
- SU1 and SU2, SU3 and SU4, SU5 and SU6, SU7 and SU8, SV1 and SV2, SV3 and SV4, SV5 and SV6, SV7 and SV8, SW1 and SW2, SW3 and SW4, SW5 and SW6, SW7 and SW8 Are equivalent to SU1 and SU2, SU3 and SU4, SV1 and SV2, SV3 and SV4, SW1 and SW2, and SW3 and SW4 in FIG.
- the maximum value of the applied voltage in the steady state of the series connection circuit of the semiconductor elements such as the semiconductor elements SU1 and SU2 is 2E.
- phase voltage of each phase can be independently set for a circuit in which the number of output phases is increased to four or more without short-circuiting the flying capacitors FC1 to FC4. Output is possible. The same is true for the superiority of the withstand voltage of the semiconductor element as compared with the conventional circuit shown in FIGS. 29 (a) and 29 (b).
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Abstract
Description
図1は、本発明におけるマルチレベル電力変換装置に用いる基本セルを示す回路図である。基本セルは、6個の半導体素子SN.1~SN.6(例えば、IGBT等の半導体スイッチ素子と逆並列にダイオードを接続したモジュール:以下同様)で構成される。
図2に、図1に示す基本セルをN個直列に接続した基本回路を示す。ここで、N≧2とする。
次に、電圧選択回路を図3に基づいて説明する。電圧選択回路は、基本回路の端子(2,…,2N,)を入力端子とし、この入力端子のうちどの電位を出力端子から出力するかを選択するものである。電圧選択回路は、図3の(a),(b),(c),(d)またはこれらの組み合わせなどによって構成される。各入力端子と出力端子との間には、半導体素子S1~S28が設けられ、この半導体素子S1~S28を選択的にONすることにより、入力端子((a)では2N_3、2(N-1)_3,4_3,2_3、(b)では2N_3,2(N-1)_3,3_3,2_3、(c)では4_3,3_3,2_3、(d)では4N+1_3,4N-1_3,4N-3_3,5_3,3_3,2_3)のうち何れかの端子の電位を出力することができる。
図4は、本実施形態1におけるマルチレベル電力変換装置の構成を示す概略図である。図4に示すように、本実施形態1におけるマルチレベル電力変換装置は、図2に示す基本回路,および図3に示す電圧選択回路を用いて構成したM相N段のマルチレベル電力変換装置である。なお、N≧2,M≧3である。
次に、本実施形態2におけるマルチレベル電力変換装置を図5に基づいて説明する。本実施形態2におけるマルチレベル電力変換装置は、図2に示す基本回路の偶数段の基本セルにおいて、第1半導体素子S2.1~SN.1をM相共通にし、第5半導体素子S2.5~SN.5を省略した回路と、基本回路の奇数段の基本セルにおいて、第4半導体素子S1.4~SN-1.4をM相共通にし、第6半導体素子S1.6~SN-1.6を省略した回路と、をN段接続した構成である。なお、本実施形態2におけるマルチレベル電力変換装置は、M相N段であり、Nは2以上の偶数,M≧3である。その他の構成は実施形態1と同様である。
次に、本実施形態3におけるマルチレベル電力変換装置を図6に基づいて説明する。本実施形態3におけるマルチレベル電力変換装置は、図2に示す基本回路の偶数段の基本セルにおいて、第4半導体素子S2.4~SN.4をM相共通にし、第6半導体素子S2.6~SN.6を省略した回路と、奇数段における基本セルにおいて第1半導体素子S1.1~SN-1.1をM相共通にし、第5半導体素子S1.5~SN-1.5を省略した回路と、をN段接続した構成である。なお、本実施形態3におけるマルチレベル電力変換装置は、M相N段であり、Nは2以上の偶数,M≧3である。その他の構成は実施形態1と同様である。
次に、本実施形態4におけるマルチレベル電力変換装置を図7に基づいて説明する。本実施形態4は、実施形態2のマルチレベル電力変換装置において、M相共通にした偶数段の基本セルの第1半導体素子S2.1~SN.1と、M相共通にした奇数段の第4半導体素子S1.4~SN-1.4を省略したものである。すなわち、図7において、端子1,5,2N-3,2N+1と接続している半導体素子を省略している。その他の構成は実施形態2と同様である。なお、Nは2以上の偶数,M≧3である。
次に、本実施形態5におけるマルチレベル電力変換装置を図8に基づいて説明する。本実施形態5は、実施形態3のマルチレベル電力変換装置において、M相共通にした偶数段の基本セルの第4半導体素子S2.4~SN.4と、奇数段の基本セルの第1半導体素子S1.1~SN-1.1を省略したものである。すなわち、図8において、端子3,2N-1と接続されている半導体素子を省略している。その他の構成は実施形態3と同様である。なお、Nは2以上の偶数、M≧3である。
図9は実施形態1においてN=1,M=3の場合の基本セルである。直流電圧源DCC1,フライングキャパシタFC1,U相の半導体素子SUN.1~SUN.6,V相の半導体素子SVN.1~SVN.6,W相の半導体素子SWN.1~SWN.6から構成される。
次に、本実施形態7におけるマルチレベル電力変換装置を図13に基づいて説明する。本実施形態7におけるマルチレベル電力変換装置では、実施形態3において、N=2,M=3,図3(a)の電圧選択回路を使用した構成である。なお、U,V,Wは出力端子を表す。
図15は、本実施形態8におけるマルチレベル電力変換装置を示す回路構成図である。本実施形態8は、実施形態2において、N=2,M=3,図3(a)の電圧選択回路を使用した構成である。U,V,Wは出力端子を表す。
次に、本実施形態9におけるマルチレベル電力変換装置を図17に基づいて説明する。本実施形態9におけるマルチレベル電力変換装置は、実施形態4において、N=2,M=3,図3(a)の電圧選択回路を使用した構成である。U,V,Wは出力端子を表す。
次に、本実施形態10におけるマルチレベル電力変換装置について、図19に基づいて説明する。本実施形態10におけるマルチレベル電力変換装置は、実施形態4において、N=2,M=3とした構成である。U,V,Wは出力端子を表す。電圧選択回路として図3(b)を使用している。
次に、本実施形態11におけるマルチレベル電力変換装置について、図21に基づいて説明する。本実施形態11におけるマルチレベル電力変換装置は、実施形態4において、N=2,M=3とした構成である。電圧選択回路として図3(c)を使用している。
次に、本実施形態12におけるマルチレベル電力変換装置について、図23に基づいて説明する。本実施形態12におけるマルチレベル電力変換装置は、実施形態5において、N=2,M=3とした構成である。電圧選択回路は、図3(c)を使用している。
次に、本実施形態13におけるマルチレベル電力変換装置について、図25に基づいて説明する。本実施形態13におけるマルチレベル電力変換装置は、実施形態4において、N=4,M=3とした構成である。電圧選択回路は、図3(a)と図3(d)を使用している。
次に、本実施形態14におけるマルチレベル電力変換装置について、図26に基づいて説明する。本実施形態14におけるマルチレベル電力変換装置は、実施形態3において、N=4,M=3とした構成である。電圧選択回路は、図3(a)を使用している。
Claims (8)
- 直流電圧源およびフライングキャパシタの電圧から複数の電圧レベルに変換した交流出力を生成するマルチレベル電力変換装置であって、
直列接続されたN個(N≧2)の直流電圧源と、
N個の直流電圧源のそれぞれの正負極間に順次直列接続された第1~第4半導体素子と、第1,第2半導体素子の共通接続点に一端が接続された第5半導体素子と、第3,第4半導体素子の共通接続点に一端が接続された第6半導体素子と、を有するM相(M≧3)の基本回路と、
全ての相の第5半導体素子の他端と全ての相の第6半導体素子の他端との間に介挿されたM相共通のフライングキャパシタと、
各基本回路の第2,第3半導体素子の共通接続点を入力端子とし、入力端子と出力端子間にそれぞれ半導体素子を有し、この半導体素子を選択的にON,OFF制御することにより、前記入力端子のうち何れかの端子の電位を出力端子から出力するM相の電圧選択回路と、
を備えたマルチレベル電力変換装置。 - 直流電圧源およびフライングキャパシタの電圧から複数の電圧レベルに変換した交流出力を生成するマルチレベル電力変換装置であって、
直列接続されたN個(N=2以上の偶数)の直流電圧源と、
直列接続されたN個の直流電圧源のうち、偶数段の直流電圧源の正極端に一端が接続されたM相(M≧3)共通の第1半導体素子と、前記偶数段の第1半導体素子の他端と前記偶数段の直流電圧源の負極端との間に順次直列接続されたM相の第2~第4半導体素子と、偶数段の第3,第4半導体素子の共通接続点に一端が接続されたM相の第6半導体素子と、奇数段の直流電圧源の負極端に一端が接続されたM相共通の第4半導体素子と、前記奇数段の直流電圧源の正極端と奇数段の第4半導体素子の他端との間に順次直列接続されたM相の第1~第3半導体素子と、奇数段の第1,第2半導体素子の共通接続点に一端が接続されたM相の第5半導体素子と、を有する基本回路と、
偶数段における第1,第2半導体素子の共通接続点と偶数段における全ての相の第6半導体素子の他端との間に介挿されたM相共通の偶数段のフライングキャパシタと、奇数段における全ての相の第5半導体素子の他端と奇数段における第3,第4半導体素子の共通接続点との間に介挿されたM相共通の奇数段のフライングキャパシタと、
各基本回路の第2,第3半導体素子の共通接続点を入力端子とし、入力端子と出力端子間にそれぞれ半導体素子を有し、この半導体素子を選択的にON,OFF制御することにより、前記入力端子のうち何れかの端子の電位を出力端子から出力するM相の電圧選択回路と、
を備えたマルチレベル電力変換装置。 - 直流電圧源およびフライングキャパシタの電圧から複数の電圧レベルに変換した交流出力を生成するマルチレベル電力変換装置であって、
直列接続されたN個(N=2以上の偶数)の直流電圧源と、
直列接続されたN個の直流電圧源のうち、偶数段の直流電圧源の負極端に一端が接続されたM相(M≧3)共通の第4半導体素子と、前記偶数段の直流電圧源の正極端と偶数段の第4半導体素子の他端との間に順次直列接続されたM相の第1~第3半導体素子と、偶数段の第1,第2半導体素子の共通接続点に一端が接続されたM相の第5半導体素子と、奇数段の直流電圧源の正極端に一端が接続されたM相共通の第1半導体素子と、奇数段の第1半導体素子の他端と奇数段の直流電圧源の負極端との間に順次直列接続されたM相の第2~第4半導体素子と、奇数段の第3,第4半導体素子の共通接続点に一端が接続されたM相の第6半導体素子と、を有する基本回路と、
偶数段における全ての第5半導体素子と第3,第4半導体素子の共通接続点の間に介挿されたM相共通の偶数段のフライングキャパシタと、奇数段における第1,2半導体素子の共通接続点と全ての第6半導体素子との間に介挿されたM相共通の奇数段のフライングキャパシタと、
各基本回路の第2,第3半導体素子の共通接続点を入力端子とし、入力端子と出力端子間にそれぞれ半導体素子を有し、この半導体素子を選択的にON,OFF制御することにより、前記入力端子のうち何れかの端子の電位を出力端子から出力するM相の電圧選択回路と、
を備えたマルチレベル電力変換装置。 - 直流電圧源およびフライングキャパシタの電圧から複数の電圧レベルに変換した交流出力を生成するマルチレベル電力変換装置であって、
直列接続されたN個(N=2以上の偶数)の直流電圧源と、
直列接続されたN個の直流電圧源のうち偶数段の直流電圧源の正極端に順次直列接続された第2,第3半導体素子と、直列接続されたN個の直流電圧源のうち奇数段の直流電圧源の負極端に順次直列接続された第3,第2半導体素子と、を有するM相(M≧3)の基本回路と、
前記奇数段および偶数段の第2,第3半導体素子のそれぞれに並列接続されたM相共通のフライングキャパシタと、
基本回路の第2,第3半導体素子の共通接続点および偶数段の直流電圧源の負極端と奇数段の直流電圧源の正極端の共通接続点を入力端子とし、入力端子と出力端子間に半導体素子を有し、この半導体素子を選択的にON,OFF制御することにより、前記入力端子のうち何れかの端子の電位を出力端子から出力するM相の電圧選択回路と、
を備えたマルチレベル電力変換装置。 - 直流電圧源およびフライングキャパシタの電圧から複数の電圧レベルに変換した交流出力を生成するマルチレベル電力変換装置であって、
直列接続されたN個(N=2以上の偶数)の直流電圧源と、
直列接続されたN個の直流電圧源のうち偶数段の直流電圧源の正負極間に順次直列接続された第2~第4半導体素子と、前記偶数段の第3,第4半導体素子の共通接続点に一端が接続された第6半導体素子と、直列接続されたN個の直流電圧源のうち奇数段の直流電圧源の正負極間に順次直列接続された第1~第3半導体素子と、前記奇数段の第1,第2半導体素子の共通接続点に一端が接続された第5半導体素子と、を有するM相(M≧3)の基本回路と、
前記偶数段における全ての第6半導体素子の他端と、偶数段の直流電圧源の正極端と第2半導体素子の共通接続点の間に介挿されたM相共通の偶数段のフライングキャパシタと、前記奇数段における全ての第5半導体素子の他端と、奇数段の直流電圧源の負極端と第3半導体素子の共通接続点との間に介挿されたM相共通の奇数段のフライングキャパシタと、
基本回路の第2,第3半導体素子の共通接続点を入力端子とし、入力端子と出力端子間にそれぞれ半導体素子を有し、この半導体素子を選択的にON,OFF制御することにより、前記入力端子のうち何れかの端子の電位を出力端子から出力するM相の電圧選択回路と、
を備えたマルチレベル電力変換装置。 - 直流電圧源およびフライングキャパシタの電圧から複数の電圧レベルに変換した交流出力を生成するマルチレベル電力変換装置であって、
直列接続されたN個(N=2以上の偶数)の直流電圧源と、
直列接続されたN個の直流電圧源のうち偶数段の直流電圧源の正負極間に順次直列接続された第1~第3半導体素子と、前記偶数段の第1,第2半導体素子の共通接続点に一端が接続された第5半導体素子と、直列接続されたN個の直流電圧源のうち奇数段の直流電圧源の正負極間に順次直列接続された第2~第4半導体素子と、前記奇数段の第3,第4半導体素子の共通接続点に一端が接続された第6半導体素子と、を有するM相(M≧3)の基本回路と、
前記偶数段における全ての第5半導体素子の他端と、偶数段の直流電圧源の負極端と第3半導体素子の共通接続点の間に介挿されたM相共通の偶数段のフライングキャパシタと、前記奇数段における全ての第6半導体素子の他端と、奇数段の直流電圧源の正極端と第2半導体素子の共通接続点との間に介挿されたM相共通の奇数段のフライングキャパシタと、
基本回路の第2,第3半導体素子の共通接続点を入力端子とし、入力端子と出力端子間にそれぞれ半導体素子を有し、この半導体素子を選択的にON,OFF制御することにより、前記入力端子のうち何れかの端子の電位を出力端子から出力するM相の電圧選択回路と、
を備えたマルチレベル電力変換装置。 - 前記基本回路および電圧選択回路の半導体素子の一部または全てを、直列数を2以上とした請求項1~6のうち何れかに記載のマルチレベル電力変換装置。
- 前記基本回路および電圧選択回路の半導体素子の一部または全てを、並列数を2以上とした請求項1~7のうち何れかに記載のマルチレベル電力変換装置。
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JP6547524B2 (ja) * | 2015-09-04 | 2019-07-24 | 株式会社明電舎 | 多相電力変換器の制御方法及び多相電力変換器 |
JP6439835B1 (ja) * | 2017-08-24 | 2018-12-19 | 株式会社明電舎 | マルチレベル電力変換装置およびその制御方法 |
EP3573227A1 (en) * | 2018-05-23 | 2019-11-27 | Nidec ASI S.A. | Electric power converter |
JP6973298B2 (ja) * | 2018-05-31 | 2021-11-24 | トヨタ自動車株式会社 | 物体監視装置 |
GB201815301D0 (en) * | 2018-09-20 | 2018-11-07 | Rolls Royce | Converter |
JP7054791B2 (ja) * | 2018-09-25 | 2022-04-15 | パナソニックIpマネジメント株式会社 | 半導体装置及びデバイス |
JP7126133B2 (ja) * | 2018-11-29 | 2022-08-26 | パナソニックIpマネジメント株式会社 | 電力変換装置 |
JP7065434B2 (ja) * | 2019-02-12 | 2022-05-12 | パナソニックIpマネジメント株式会社 | 電力変換装置 |
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