WO2016031295A1 - 3レベル電力変換装置 - Google Patents
3レベル電力変換装置 Download PDFInfo
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- WO2016031295A1 WO2016031295A1 PCT/JP2015/061544 JP2015061544W WO2016031295A1 WO 2016031295 A1 WO2016031295 A1 WO 2016031295A1 JP 2015061544 W JP2015061544 W JP 2015061544W WO 2016031295 A1 WO2016031295 A1 WO 2016031295A1
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- connection terminal
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 11
- 239000003990 capacitor Substances 0.000 claims abstract description 28
- 239000004065 semiconductor Substances 0.000 claims description 46
- 239000004020 conductor Substances 0.000 abstract description 36
- 230000003071 parasitic effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000004907 flux Effects 0.000 description 5
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 229910010271 silicon carbide Inorganic materials 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L25/00—Assemblies consisting of a plurality of semiconductor or other solid state devices
- H01L25/03—Assemblies consisting of a plurality of semiconductor or other solid state devices all the devices being of a type provided for in a single subclass of subclasses H10B, H10F, H10H, H10K or H10N, e.g. assemblies of rectifier diodes
- H01L25/10—Assemblies consisting of a plurality of semiconductor or other solid state devices all the devices being of a type provided for in a single subclass of subclasses H10B, H10F, H10H, H10K or H10N, e.g. assemblies of rectifier diodes the devices having separate containers
- H01L25/11—Assemblies consisting of a plurality of semiconductor or other solid state devices all the devices being of a type provided for in a single subclass of subclasses H10B, H10F, H10H, H10K or H10N, e.g. assemblies of rectifier diodes the devices having separate containers the devices being of a type provided for in subclass H10D
- H01L25/115—Assemblies consisting of a plurality of semiconductor or other solid state devices all the devices being of a type provided for in a single subclass of subclasses H10B, H10F, H10H, H10K or H10N, e.g. assemblies of rectifier diodes the devices having separate containers the devices being of a type provided for in subclass H10D the devices being arranged next to each other
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L25/00—Assemblies consisting of a plurality of semiconductor or other solid state devices
- H01L25/18—Assemblies consisting of a plurality of semiconductor or other solid state devices the devices being of the types provided for in two or more different main groups of the same subclass of H10B, H10D, H10F, H10H, H10K or H10N
-
- 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
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
-
- 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
-
- 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
- H02M7/53—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 using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—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 using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/0026—Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units
- H05K5/0065—Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units wherein modules are associated together, e.g. electromechanical assemblies, modular structures
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0247—Electrical details of casings, e.g. terminals, passages for cables or wiring
-
- 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
Definitions
- the present invention relates to a three-level power converter using a semiconductor switch module, and more particularly to a wiring structure of a capacitor and a module.
- a circuit for one phase of a general three-level single-phase inverter or multi-phase inverter is configured as shown in FIG.
- the inverter is a circuit that converts DC power into AC power, but as is well known, it also operates to convert AC power into DC power.
- reference numeral 1 denotes a DC power supply, and its voltage is divided by capacitors 2 and 3 to form three potentials P, M and N.
- Reference numerals 4 to 7 denote semiconductor switch elements capable of intermittently controlling forward current and always conducting with reverse current. This semiconductor switch element is shown here by a MOSFET (metal oxide semiconductor field effect transistor) and a diode connected in antiparallel. The semiconductor switch elements 6 and 7 are connected in series in the reverse direction, thereby constituting a so-called bi-directional switch capable of controlling current interruption in both forward and reverse directions.
- the semiconductor switch elements 4 and 5 are connected in series to constitute one phase upper and lower arms 11.
- a bidirectional switch configured by connecting the semiconductor switch elements 6 and 7 in series to the upper and lower arms 11 is referred to as an intermediate arm 12.
- the potential of the AC output terminal U is equal to the potential of the high potential end P of the DC power supply 1 when the semiconductor switch element 4 of the upper and lower arms 11 is turned on.
- the semiconductor switch element 5 When the semiconductor switch element 5 is turned on It becomes equal to the potential of the low potential end N of the power supply 1.
- the semiconductor switch element 6 or 7 of the intermediate arm when the semiconductor switch element 6 or 7 of the intermediate arm is turned on, the potential at the AC output terminal U becomes equal to the potential at the midpoint M of the two capacitors 2 and 3, ie, the intermediate potential of the DC power supply 1.
- the circuit of FIG. 11 constitutes a three-level inverter which can select the potential of the AC output terminal U at three voltage levels according to the on state of each semiconductor switch element.
- the three-level inverter circuit generating such three-level output is characterized in that the withstand voltage of the semiconductor switch elements 6, 7 constituting the intermediate arm 12 is 1/2 of the semiconductor switch elements 4, 5 of the upper and lower arms 11. There is. Further, the conduction loss and the switching loss generated in the semiconductor switch elements of the upper and lower arms and the intermediate arm differ depending on the operating conditions (power factor and modulation factor). For this reason, depending on the operating conditions of the device to which this circuit is applied, the semiconductor switch elements constituting the upper and lower arms and the intermediate arm change in specifications suitable for the withstand voltage, the switching characteristics, and the like.
- a surge voltage is generated due to a current change rate (di / dt) at the time of switching operation and a parasitic inductance existing on the circuit, which causes an overvoltage of the semiconductor switch element. It is often a problem. Since this problem similarly occurs in the above three-level inverter circuit, it is necessary to minimize the parasitic inductance of the direct current loop current path.
- Patent Document 1 discloses three connection conductors of a connection conductor connected to a high potential point P, a connection conductor connected to an intermediate potential point M, and a connection conductor connected to a low potential point N There is disclosed a technique for reducing the inductance of a wiring by forming a conductor as a laminate structure in which these flat conductors are disposed close to each other via an insulator.
- FIG. 12 shows the wiring structure described in Patent Document 1 mentioned above.
- 12 shows a wiring structure of a three-phase three-level inverter, wherein Cd1 to Cd4 are DC capacitors, 18, 19 and 20 are phase modules shown in FIG. 11 containing semiconductor switching elements, and 29 is a flat P potential connecting conductor bar
- Reference numeral 30 denotes a flat M-potential connection conductor bar
- 31 denotes a flat N-potential connection conductor bar.
- the DC capacitors Cd1 to Cd4 are disposed in the Y direction shown in the figure, which is the horizontal direction of the phase modules 18, 19 and 20, and the flat connection conductor bars 29, 30 and 31 are laminated via the insulating sheets 32 and 33 between them. Composed of connecting conductor bars of laminated structure.
- the laminated connection conductor bar can reduce the parasitic inductance of the conductor portion by canceling out the magnetic flux due to the reciprocating current flowing through the conductor.
- Patent Document 1 As described above, in the prior art, the connection conductor bars of the direct current circuit current path are arranged close to each other to reduce the parasitic inductance of the wiring.
- Patent Document 1 one phase of the three-level inverter is configured It is assumed that the semiconductor switch elements of the upper and lower arms and the intermediate arm are housed in one and the same package as one module. Therefore, Patent Document 1 does not disclose anything about the wiring structure in the case where the upper and lower arms and the intermediate arm are configured as separate modules and these are combined to configure a three-level inverter circuit.
- high-speed semiconductor switching devices such as, for example, SiC-MOSFETs and the like formed of silicon carbide (SiC), gallium nitride (GaN) based materials, or wide band gap (WBG) semiconductors such as diamond appear.
- SiC silicon carbide
- GaN gallium nitride
- WBG wide band gap
- the object of the present invention is to form a three-level power conversion device with a plurality of modules accommodating semiconductor switching elements, and to minimize the wiring inductance of the DC loop current path in this device. To realize the wiring structure.
- the present invention is A first module containing upper and lower arms constituting a three-level power conversion circuit; A second module that accommodates an intermediate arm that constitutes a three-level power conversion circuit, and is arranged adjacent to and adjacent to the first module; A flat high-potential connection terminal plate connected to the connection terminal on the upper surface of the first module and being drawn out in the vertical direction by connecting the lower end to the connection terminal; A flat low-potential connection terminal plate connected to the connection terminal on the upper surface of the first module and drawn out in the vertical direction by connecting the lower end to the connection terminal; A flat-plate-like intermediate potential connection terminal plate having a lower end connected to the connection terminal on the upper surface of the second module and drawn out in the vertical direction, and an external connection end portion is formed on the upper end thereof; Equipped with The high potential connection terminal board, the low potential connection terminal board, and the intermediate potential connection terminal board are stacked closely in parallel with one another, and terminals of DC capacitors are connected to respective external connection ends. Do.
- the terminal connection portion connected to the connection terminal on the upper surface of each module and the external connection end portion be arranged diagonally on the connection terminal plate.
- connection terminals on the upper surface of the first module and the second module are pin-like terminals, and can be arranged in the same array on the upper surface of each module, and each terminal is two pin terminals Composed of
- a plurality of module pairs consisting of the first module and the second module are arranged such that the first module and the second module are alternately adjacent to each other,
- the high potential connection terminal board, the low potential connection terminal board, and the intermediate potential connection terminal board are formed across all the modules of the plurality of module pairs,
- the plurality of module pairs can be connected in parallel by the high potential connection terminal board, the low potential connection terminal board, and the intermediate potential connection terminal board.
- the semiconductor switch element included in the first module may be formed of a wide band gap semiconductor.
- the first module containing the upper and lower arms constituting the three-level inverter and the intermediate arm are accommodated, and the second module is separately provided.
- the connection terminal plates drawn out from the respective modules are arranged close to each other in parallel via insulating plates, the wiring inductance of the direct current loop current path in the three-level inverter can be minimized.
- the connection terminal plates are simply extended in common, so the wiring inductances of the respective DC loop paths are made small and almost even, and the current sharing Unbalance can be suppressed.
- the circuit block diagram of the single phase part of the 3 level inverter which shows the Example of this invention The perspective view showing the appearance of the 1st module which stored the upper and lower arms used for this invention, and the 2nd module which stored the middle arm.
- the 1st Example of this invention is shown, and it is a perspective view which shows the external appearance of the module assembly of a 3 level inverter.
- the 1st Example of this invention is shown, and the perspective view which decomposes
- the 1st Example of this invention It is a flowchart showing the assembly procedure of a module assembly.
- the 1st Example of this invention is shown, (a) is a perspective view which shows the external appearance of a capacitor
- the 2nd Example of this invention is shown, and it is a perspective view which shows the external appearance of 2 parallel module assembly.
- the 3rd Example of this invention is shown, and it is a perspective view which shows the external appearance of 3 parallel module assembly.
- the circuit block diagram which shows the structure for single phases of a common 3 level inverter.
- the wiring structure of the conventional three level inverter is shown, (a) Top view, (b) Side view.
- FIG. 1 shows a first embodiment of the present invention, and is a circuit diagram of one phase of a three-level inverter.
- FIG. 1 a circuit in which semiconductor switches 4 and 5 configured by MOSFETs, which are upper and lower arms of a three-level inverter, are connected in series is accommodated in a first module 20.
- the bidirectional switch serving as an intermediate arm of the three-level inverter is composed of diodes 10 and 11 and IGBTs 12 and 13, which are accommodated in the second module 30.
- the semiconductor switches applied to the upper and lower arms and the intermediate arms are not limited to the example shown in FIG. 1, and various high speed switching devices such as wide band gap semiconductor materials such as SiC (silicon carbide) which are being put into practical use recently.
- a semiconductor switch can be used.
- a high potential connection terminal 20P connected to the high potential terminal P of the DC power supply, a low potential connection terminal 20N connected to the low potential terminal N, an output terminal 20U for extracting AC output, and the semiconductor switch 4 , And 5 and the auxiliary source terminals 20S4 and 20S5 are drawn out.
- intermediate potential connection terminal 30M connected to intermediate potential terminal M of DC power supply
- connection terminal 30U connected to output terminals 20U of upper and lower arms
- gate connection of semiconductor switches 12 and 13 The terminals 30G12 and 30G13 and the auxiliary emitter terminals 30E12 and 30E13 are pulled out.
- the DC capacitors 2 and 3 are connected between the high potential terminal P and the low potential terminal N of the DC power source 1 and the intermediate potential terminal M, respectively.
- the high potential terminal P connected to the capacitor 2 and the high potential connection terminal 20P of the upper and lower arm modules 20 are connected by the high potential connection conductor 40P.
- the low potential terminal N connected to the capacitor 3 and the low potential connection terminal 20N of the upper and lower arm modules 20 are connected by the low potential connection conductor 40N.
- the intermediate potential connection terminal 30M of the intermediate arm module 30 and the intermediate potential terminal M are connected by the intermediate potential connection conductor 40M.
- the output terminal 20U of the upper and lower arm modules 20 and the output end connection terminal 30U of the intermediate arm 30 are connected by the output connection conductor 40U.
- FIG. 2 shows an appearance of a module 20 constituting the upper and lower arms of FIG. 1 and a module 30 constituting the intermediate arm.
- Each module is airtightly packaged in an insulating resin block containing semiconductor switch elements.
- a plurality of connection terminals are disposed on the upper surface of the block, and mounting holes 20e, 30e through which mounting screws for clamping and connecting the module to a heat dissipation substrate are provided at both ends.
- connection terminals provided in both modules 20 and 30 are respectively constituted by a pair of pin electrodes, and are arranged in substantially the same manner in both modules.
- the connection terminals 20P, 20N and 20U of the upper and lower arm modules 20 are the high potential connection terminal 20P, the low potential connection terminal 20N and the output connection terminal 20U of the upper and lower arm module 20 of FIG.
- the connection terminals 20G4 and 20G5 of the module 20 are gate terminals of the semiconductor switches 4 and 5 of the upper and lower arms 20 in FIG. 1, and 20S4 and 20S5 are auxiliary source terminals.
- connection terminals 30M and 30U of the intermediate arm module 30 are the intermediate potential connection terminal 30M and the output terminal 30U of the intermediate arm module 30 of FIG.
- the connection terminals 30G12 and 30G13 of the intermediate module 30 are gate terminals of the semiconductor switches 12 and 13 of the intermediate arm 30 of FIG. 1, and 30E12 and 30E13 are auxiliary emitter terminals.
- the terminal 30 B of the intermediate arm module 30 is a vacant terminal not used for electrical connection provided to arrange the terminal arrangement of the intermediate arm module 30 in the same arrangement as the terminal arrangement of the upper and lower arm modules 20.
- FIG. 3 is an assembly configuration diagram of a one-phase unit of a three-level inverter in which the connection terminal board assembly 40 according to the present invention is disposed in a coupled manner to the two modules 20 and 30 shown in FIG.
- the modules 20 and 30 are disposed close to and in parallel on the cooling substrate 70 formed of a heat dissipating member, and are attached and fixed by a mounting screw 40c.
- a connection terminal plate assembly 40 is fixedly arranged vertically across the two modules 20 and 30 arranged in parallel.
- connection terminal plate assembly 40 is configured by overlapping a plurality of vertically standing terminal plates and insulating plates, and therefore details thereof can not be easily seen in FIG. Reference is made to FIG. 4 in the following description.
- the output terminal plate 41 is a connection terminal plate serving as a connection conductor 40U (FIG. 1) connecting the output terminals 20U and 30U of both modules, and is formed of a flat conductive material. At the left end side in FIG. 4, there is provided a connection end 41 a bent at a right angle over the entire width. The connection end 41a is provided with a fitting hole 41e for inserting and fitting the pin-shaped connection terminals 20U and 30U of both modules. Further, a fixing screw 41 c for fixing and supporting the terminal plate 41 on the cooling substrate 70 and a spacer 41 d made of an insulating material are coupled to the right end side of the terminal plate 41. Further, the terminal plate 41 is provided with screw insertion holes 41f for inserting mounting screws at positions facing the mounting holes 20e and 30e of the modules when coupled to the modules 20 and 30.
- connection terminal plates 44 and 48 are terminal plates to be the low potential connection conductor 40N and the high potential conductor 40P in FIG. 1, respectively, and are formed of a flat conductive material.
- Terminal connection portions 44a and 48a for connecting to the connection terminals 20N and 20P of the module 20 are formed at right angles in the lower ends of the tip side (the module 20 side) in FIG. ing.
- external connection end portions 44 b and 48 b constituted by screw terminals for connection with the outside are made at right angles It is bent and formed.
- the external connection ends 44b and 48b project in opposite directions.
- the terminal connection portions 44a and 48a are provided with fitting holes 44e and 48e for inserting and fitting the pin-shaped connection terminals 20N and 20P of the module 20, respectively.
- connection terminal plate 46 is a terminal plate to be the intermediate potential connection conductor 40M in FIG. 1 and is formed of a flat conductive material.
- a terminal connection portion 46a for connecting to the connection terminal 30M of the module 30 is bent at a right angle at the lower end of the front end side (the module 30 side).
- an external connection end 46b constituted by screw terminals for connection with the outside is bent at a right angle to form There is.
- Attached to the connection terminal plate 46 is an auxiliary terminal plate 46s that is coupled to the external connection end 46b and causes the left and right sides to project.
- the insulating plates 42 and 43 are insulating plates inserted between the output terminal plate 41 and the low potential connection terminal plate 44.
- the lower end side of the outermost insulating plate 42 is bent outward to increase the insulation creeping distance, and the upper end thereof is a recess 42g for passing the external connection end 44b of the connection terminal plate 44, and the connection terminal plate 46.
- a concave portion 42h for passing the external connection portion 46b and the auxiliary terminal plate 46s is formed.
- the insulating plate 45 is an insulating plate inserted between the connection terminal plates 44 and 46, and has a recess 45g for passing the auxiliary terminal plate 46s of the connection terminal plate 46 on the tip end side of the upper end.
- the insulating plate 47 is an insulating plate inserted between the connection terminal plates 46 and 48, and has a recess 47g for passing the auxiliary terminal plate 46s of the connection terminal plate 46 at the back side (module 20 side) of the upper end .
- the insulating plate 49 is an insulating plate inserted between the connection terminal plate 48 and the gate circuit board 50 disposed outside thereof.
- Gate circuit board 50 is formed of a printed circuit board provided with a gate drive circuit of semiconductor switches of each module (not shown), and gate connection terminals 20G and 30G of modules 20 and 30, auxiliary source terminal 20S, auxiliary emitter terminal A gate terminal connection hole 50e for connection to 30E is provided. Further, the gate circuit board 50 is provided with a screw insertion hole 50f for inserting the mounting screw 40c at a position facing the mounting holes 20e and 30e of the module when coupled to the modules 20 and 30.
- connection terminal plates and insulating plates have a width W40 that is equal to the total width Wm of two adjacent modules 20 and 30 arranged in parallel, as shown in FIG.
- the width of the insulating plate should be slightly larger than the full width Wm of the module so that the insulating plate slightly protrudes from the side edge of the module.
- FIG. 1 An assembling procedure of such a three-level inverter provided with the upper and lower arm modules 20, the intermediate arm module 30, the connecting terminal plate assembly 40 and the gate circuit board 50 is shown in FIG.
- the module 20 containing the upper and lower arms constituting the three-level inverter and the module 30 containing the intermediate arm are arranged side by side with the gate terminals 20G and 30G in parallel with the left hand front. To place. At this time, the left front end and the right rear end of the modules are aligned so that the connection terminals of each column of each module are arranged in the same column.
- connection terminal plate 41 is horizontally mounted on both the right rear end side of the modules 20 and 30 so that the output connection of each module is connected to each fitting hole 41e.
- the terminals 20U and 30U are inserted and fitted.
- connection terminals 20U and 30U and connection terminal plate 41 are electrically and mechanically coupled. , Fix the connection terminal plate 41.
- connection terminal plate 41 When the connection terminal plate 41 is fixed on the modules 20, 30, the insulating plates 42 and 43 are sequentially arranged vertically in front of it as shown in FIGS. 5 (c) and 5 (d).
- connection terminal plate 44 is vertically disposed in front of the insulating plate 43 as shown in FIG. 5 (e).
- the connection terminal 20N of the module 20 is inserted and fitted into the fitting hole 44e of the connection end 44a of the terminal plate 44, and the connection terminal plate 44 and the connection terminal 20N are electrically and mechanically formed by appropriate means.
- the connection terminal plate 44 is fixed by bonding.
- the insulating plate 45 is vertically disposed in front of the connection terminal plate 44.
- the intermediate potential connection terminal plate 46 is vertically disposed in front of the insulating plate 45 as shown in FIG. 5 (g).
- the intermediate potential connection terminal 30M of the module 30 is inserted and fitted into a fitting hole 46e of the connection end 46a (not shown) of the connection terminal plate 46.
- the connection terminal plate 46 and the connection terminal 30M are electrically and mechanically coupled by an appropriate means, and the connection terminal plate 46 is fixed.
- the screw connection terminal portion 46b at the upper end portion of the connection terminal plate 46 projects to the right through the recess of each insulating plate.
- connection terminal plate 48 is vertically disposed in front of the connection terminal plate 46.
- the high potential connection terminal plate 48 is vertically disposed.
- the high potential connection terminal 20P of the module 20 is inserted and fitted into the fitting hole 48e of the connection end portion 48a at the lower end of the connection terminal plate 48, and the connection terminal plate 48 and the connection terminal are electrically and mechanically coupled. And fix the connection terminal plate 48.
- the insulating plate 49 is vertically disposed in front of the connection terminal plate 48 and the gate circuit plate 50 is horizontally disposed. Insert the gate connection terminals 20G4 and 20G5 of the module 20, the auxiliary source terminals 20S4 and 20S5, and the gate connection terminals 30G12 and 30G13 of the module 30, and the auxiliary emitter terminals 30E12 and 30E13 into the fitting holes 50e of the gate circuit board 50, respectively. Do. Then, the gate circuit board 50 is electrically and mechanically coupled and fixed to the gate terminal, the auxiliary source terminal and the auxiliary emitter terminal.
- auxiliary terminal plate 46s is placed on the external connection end 46b of the intermediate potential connection terminal plate 46, and is electrically and mechanically coupled so that the screw connection terminal portion protrudes laterally.
- FIG. 6 shows the appearance of the completed one-phase unit of the three-level inverter completed, and FIG. 7 shows a side view.
- FIG. 6 (a) shows a DC capacitor 60.
- the DC capacitor 60 is provided with two connection terminals 61 and 62, which are connected to the external connection end 44b and the auxiliary terminal plate 46, and to the connection terminal 44b and the auxiliary terminal plate 46. .
- FIGS. 6B and 7 show the configuration of a one-phase unit of a three-level inverter in which two DC capacitors 60-1 and 60-2 are coupled to the module assembly.
- FIG. 6 (b) the connection between the external connection end (44b, 46s, 48b) of the module assembly and the terminals (61-1, 62-1, 61-2, 62-2) of the capacitor is clear.
- the capacitors 60-1 and 60-2 are shown as being transparent.
- Capacitors 60-1 and 60-2 are respectively an external connection end 48b of high potential connection terminal plate 48 of the module assembly and an auxiliary terminal plate 46s coupled to external connection end 46b of intermediate potential connection terminal plate 46. And between the external connection end 44b of the low potential connection terminal plate 44 and the auxiliary terminal plate 46s coupled to the external connection end 46b of the intermediate potential connection terminal plate 46.
- a one-phase unit of a three-level inverter having the circuit configuration shown in FIG. 1 is formed.
- the high potential connection terminal plate 48, the intermediate potential connection terminal plate 46, and the low potential connection terminal plate 44 which form a direct current loop current path, closely overlap each other in parallel.
- the wiring inductance of the direct current loop current path in the one-phase unit of the three-level inverter can be reduced.
- the terminal connection part (44a, 46a, 48a) and the external connection end part (44b, 46b, 48b) which connect with the connection terminal of the module of each connection terminal board (44, 46, 48) are Since they are provided at diagonal positions of the upper and lower sides of the terminal plate, the wiring inductance of each connection terminal plate can be further reduced.
- FIG. 8 (a) is a diagram showing the flow of current in each connection terminal board provided with connection end parts at diagonally opposite positions of the upper and lower sides of the connection terminal board according to the present invention.
- FIG. 8B is a view showing the flow of current in the connection terminal plate provided at a position directly opposite the connection end portions on the upper and lower sides of the connection terminal plate for comparison with the present invention.
- the terminal connection portion 48a for connection to the connection terminal of the module at the lower end of the high potential connection terminal plate 48 is positioned immediately above the module 20. It is provided close to the left side, and the external connection end 48 b at the upper end is provided so as to be positioned right above the module 30. Therefore, the terminal connection portion 48 a and the external connection end portion 48 b of the connection terminal plate 48 are placed at diagonal positions of the upper and lower sides of the connection terminal plate 48. As a result, in the connection terminal plate 48, current flows obliquely from the external connection end portion 48b to the terminal connection portion 48a as shown by the solid line arrow A.
- connection terminal plate 46 serving as an intermediate potential connection conductor disposed opposite to the connection terminal plate 48
- the terminal connection portion 46a at the lower end is provided close to the right so as to be located directly above the module 30
- the connection end 46 b is provided close to the left end so as to be located immediately above the module 20.
- the terminal connection portion 46 a and the external connection end 46 b are also placed at diagonal positions of the upper and lower sides of the connection terminal plate 46.
- a current flows from the terminal connection portion 46 a to the external connection end 46 b in the direction inclined in the direction opposite to the arrow A in the connection terminal plate 46.
- the wiring inductance of the direct current loop current path can be further reduced by the difference in the flow of the current.
- FIG. 9 shows a second embodiment of the present invention.
- two sets of a module 20 for accommodating the upper and lower arms and a module 30 for accommodating the intermediate arm are connected in parallel.
- the insulating plate is omitted from the connection terminal plate assembly, and the configuration of the connection terminal plate assembly is simplified.
- modules 20-1 and 20-2 containing two sets of upper and lower arms and modules 30-1 and 30-2 containing intermediate arms arrange the modules alternately in parallel.
- the two sets of parallel arranged modules are provided in common with the connection terminal plates 44A, 46A and 48A and the gate circuit board 50A, which comprise two sets of modules 20-1, 20-2 and 30-1. , 30-2 are arranged.
- the high potential connection terminal plate 48A is provided with two terminal connections (48a-1, 48a-2) for connection to the connection terminals of the modules 20-1 and 20-2 accommodating the upper and lower arms, and capacitors Two external connection ends (48b-1, 48b-2) are provided for connecting the like.
- the low potential connection terminal plate 44A is provided with two terminal connection portions (not shown) for connecting to the connection terminals of the modules 20-1 and 20-2 accommodating the upper and lower arms, and for connecting a capacitor etc. Two external connection ends (44b-1, 44b-2) are provided.
- the intermediate potential connection terminal plate 46A is provided with two terminal connections (46a-1, 46a-2) for connection to the connection terminals of the modules 30-1 and 30-2 accommodating the intermediate arm, and capacitors There are two external connection ends (46b-1, 46b-2) for connecting etc.
- the capacitors are not shown here, but between the upper external connection end 48b-1 and 46b-1 of each connection terminal plate, between 44b-1 and 46b-1, 48b-2 and 46b. -Connect between 2 and between 44b-2 and 46b-2 respectively and place on top of the module.
- each connection terminal plate and the external connection terminal portion are placed at diagonal positions for each set of modules.
- the terminal connection portion 48a-1 is placed immediately above the module 20-1, and the external connection end portion 48b-1 is located immediately above the module 30-1 paired with the module 20-1.
- another terminal connection portion 48a-2 is placed directly on the other set of modules 20-2, and the external connection end 48b-2 is paired with the module 20-2 and the module 30-2. It is placed directly above.
- the wire inductance of each connection terminal plate can be reduced by the canceling action of the magnetic flux of the current flowing opposite to each other between the connection terminal plates. Then, since the terminal connection portion of each connection terminal plate and the external connection end portion are provided at the diagonal positions of each terminal plate, the wiring inductance of each connection terminal plate can be further reduced as in the first embodiment. Can be suppressed.
- FIG. 10 shows a third embodiment of the present invention. This embodiment is an example in which a module accommodating three sets of upper and lower arms and a module accommodating an intermediate arm are connected in parallel. Similar to the second embodiment, FIG. 10 shows the connecting terminal plate assembly with the configuration simplified by omitting the insulating plate from the connecting terminal plate assembly.
- the modules 20-1, 20-2 and 20-3 containing three sets of upper and lower arms and the modules 30-1, 30-2 and 30-3 containing intermediate arms have respective modules Arranged alternately in parallel.
- Connecting terminal boards 44B, 46B and 48B and a gate circuit board 50B are provided in common to the three sets of parallel arranged modules, and these four modules 20-1, 20-2, 20-3 are provided. , 30-1, 30-2 and 30-3.
- the high potential connection terminal plate 48B has three terminal connections (48a-1, 48a-2, 48a) for connection to the connection terminals of the modules 20-1, 20-2 and 20-3 accommodating the upper and lower arms. -3) Provided and three external connection ends (48b-1, 48b-2, 48b-3) for connecting capacitors and the like.
- the low potential connection terminal plate 44B is provided with three terminal connection portions (not shown) for connection to the connection terminals of the modules 20-1, 20-2 and 20-3 accommodating the upper and lower arms, and a capacitor etc. 3 (44b-1, 44b-2, 44b-3) are provided for connecting external connection ends.
- the intermediate potential connection terminal plate 46B has three terminal connections (46a-1, 46a-2, 46a) for connection to the connection terminals of the modules 30-1, 30-2 and 30-3 accommodating the intermediate arms. -3) Provided and three external connection ends (46 b-1, 46 b-2, 46 b-3) for connecting a capacitor or the like.
- the capacitors are not shown here, but between the upper external connection end 48b-1 and 46b-1 of each connection terminal plate, between 44b-1 and 46b-1, 48b-2 and 46b. Connect between -2 and between 44b-2 and 46b-2, between 48b-3 and 46b-3, and between 44b-3 and 46b-3 and place them on top of the module .
- each connection terminal plate and the external connection terminal portion are placed at diagonal positions for each set of modules.
- the terminal connection portion 48a-1 is placed immediately above the module 20-1, and the external connection end portion 48b-1 is located immediately above the module 30-1 paired with the module 20-1.
- the terminal connection portion 48a-2 is placed directly on another set of modules 20-2, and the external connection end 48b-2 is placed directly on the module 30-2 paired with the module 20-2.
- the other terminal connection 48a-1 is placed directly on the other set of modules 20-3, and the external connection end 48b-1 is a module 30-3 paired with this module 20-3. It is placed just above the
- the wire inductance of each connection terminal plate can be reduced by the canceling action of the magnetic flux formed by the current flowing between the connection terminal plates facing each other. And, since the terminal connection portion of each connection terminal board and the external connection end are provided at the diagonal positions of each terminal board, as in the first embodiment and the second embodiment, Wiring inductance can be suppressed to be smaller.
- the wiring inductance in the direct current loop current path in the three-level inverter can be further reduced.
- the semiconductor switch included in the module accommodating the upper and lower arms is a wide band such as SiC. Even if a high speed semiconductor switch composed of a gap (WBG) semiconductor is used, since the surge voltage can be suppressed, the performance and safety of the three-level inverter can be enhanced.
- WBG gap
- Connection terminal plate assembly 41 Output Connection terminal plate 41a to be a connection conductor: terminal connection portion 42, 43, 45, 47, 49: insulating plate 44: connection terminal plate 44a to 44a-1, 44a-2, 44a-3 to be a low potential connection conductor: terminal Connection portions 44b, 44b-1, 44b-2, 44b-3: external connection end 46: connection terminal plates 46a, 46a-1, 46a-2, 46a-3 which become intermediate potential connection conductors: terminal connection portions 44b, 46b-1, 46b-2, 46b-3: external connection end 48: connection terminal plate 48a, 48a-1, 48a-2, 48a-3 to be a high potential connection conductor: terminal connection portion 48b, 48b-1, 48b-2, 48b-3 External connection end 50: the gate circuit board
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Abstract
Description
また、近年、炭化ケイ素(SiC)、窒化ガリウム(GaN)系材料またはダイヤモンド等のワイドバンドギャップ(WBG)半導体で形成された、例えばSiC‐MOSFET等のような、高速半導体スイッチ素子が出現している。このようなワイドバンドギャップ半導体で構成した高速半導体スイッチ素子を適用した電力変換装置は、より高速で、高周波のスイッチング動作をさせるため、配線の寄生インダクタンスのさらなる低減が必要となる。
1)半導体スイッチ素子モジュールと直流コンデンサ間の距離は、短縮することができない。
2)端子の周囲は絶縁距離確保のため、異電位の配線バーは穴をあけるなどして逃げる必要があり、端子間が近接しているモジュールでは、水平方向にバーを重ねるとこの逃げによってモジュール直上では重なり部分がほとんどなくなってしまい、往復電流による磁束の打消し効果が減じられる。
3レベル電力変換回路を構成する上下アームを収容した第1モジュールと、
3レベル電力変換回路を構成する中間アームを収容し、前記第1モジュールと隣り合わせに並べて近接配置される第2モジュールと、
前記第1モジュールの上面の接続端子に下端を接続して垂直方向に引き出され、その上端に外部接続端部が形成される平板状の高電位接続端子板と、
前記第1モジュールの上面の接続端子に下端を接続して垂直方向に引き出され、その上端に外部接続端部が形成される平板状の低電位接続端子板と、
前記第2モジュールの上面の接続端子に下端を接続して垂直方向に引き出され、その上端に外部接続端部が形成される平板状の中間電位接続端子板と、
を備え、
前記高電位接続端子板、前記低電位接続端子板、前記中間電位接続端子板が互いに平行に近接して重ね合わせられ、それぞれの外部接続端部に直流コンデンサの端子が接続されることを特徴とする。
前記高電位接続端子板、前記低電位接続端子板および前記中間電位接続端子板が、前記複数のモジュール対の全モジュールに跨って形成され、
前記複数のモジュール対を、前記高電位接続端子板、前記低電位接続端子板および前記中間電位接続端子板で並列接続することができる。
上下アームモジュール20の接続端子20P、20Nおよび20Uは、図1の上下アームモジュール20の高電位接続端子20P、低電位接続端子20Nおよび出力接続端子20Uである。モジュール20の接続端子20G4および20G5は、図1の上下アーム20の半導体スイッチ4および5のゲート端子、20S4および20S5は、補助ソース端子である。
Claims (5)
- 3レベル電力変換回路を構成する上下アームを収容した第1モジュールと、
3レベル電力変換回路を構成する中間アームを収容し、前記第1モジュールと隣り合わせに並べて近接配置される第2モジュールと、
前記第1モジュールの上面の接続端子に下端を接続して垂直方向に引き出され、その上端に外部接続端部が形成される平板状の高電位接続端子板と、
前記第1モジュールの上面の接続端子に下端を接続して垂直方向に引き出され、その上端に外部接続端部が形成される平板状の低電位接続端子板と、
前記第2モジュールの上面の接続端子に下端を接続して垂直方向に引き出され、その上端に外部接続端部が形成される平板状の中間電位接続端子板と、
を備え、
前記高電位接続端子板、前記低電位接続端子板、前記中間電位接続端子板が互いに平行に近接して重ね合わせられ、それぞれの外部接続端部に直流コンデンサの端子が接続されることを特徴とする3レベル電力変換装置。 - 前記各モジュールの上面の接続端子に接続される端子接続部と前記外部接続端部とが、前記接続端子板上で対角となる位置に配置されることを特徴とする請求項1に記載の3レベル電力変換装置。
- 前記第1モジュールと前記第2モジュールの上面の接続端子は、ピン状の端子であって、各モジュールの上面で同じ配列に配置されていることを特徴とする請求項1または2に記載の3レベル電力変換装置。
- 前記第1モジュールと前記第2モジュールとからなる複数のモジュール対が、第1モジュールと第2モジュールとが交互に隣接するように配置され、
前記高電位接続端子板、前記低電位接続端子板および前記中間電位接続端子板が、前記複数のモジュール対の全モジュールに跨って形成され、
前記複数のモジュール対が、前記高電位接続端子板、前記低電位接続端子板および前記中間電位接続端子板で並列接続されることを特徴とする請求項1ないし3の何れか1項に記載の3レベル電力変換装置。 - 前記第1モジュールに含まれる半導体スイッチ素子がワイドバンドギャップの半導体で形成されていることを特徴とする請求項1ないし4の何れか1項に記載の3レベル電力変換装置。
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JP7283243B2 (ja) | 2019-06-13 | 2023-05-30 | 富士電機株式会社 | 電力変換装置 |
JP2021019466A (ja) * | 2019-07-23 | 2021-02-15 | 富士電機株式会社 | 電力変換装置 |
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Also Published As
Publication number | Publication date |
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EP3093974B1 (en) | 2019-02-20 |
EP3093974A4 (en) | 2017-10-18 |
EP3093974A1 (en) | 2016-11-16 |
US20160344301A1 (en) | 2016-11-24 |
JPWO2016031295A1 (ja) | 2017-04-27 |
US10153708B2 (en) | 2018-12-11 |
JP6160780B2 (ja) | 2017-07-12 |
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