WO2024024169A1 - パワー半導体モジュールおよびそれを用いたモータ駆動システム - Google Patents
パワー半導体モジュールおよびそれを用いたモータ駆動システム Download PDFInfo
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- WO2024024169A1 WO2024024169A1 PCT/JP2023/013093 JP2023013093W WO2024024169A1 WO 2024024169 A1 WO2024024169 A1 WO 2024024169A1 JP 2023013093 W JP2023013093 W JP 2023013093W WO 2024024169 A1 WO2024024169 A1 WO 2024024169A1
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- power semiconductor
- semiconductor module
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- snubber capacitor
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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
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
-
- 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, H10D, H10F, H10H, H10K or H10N, e.g. assemblies of rectifier diodes
- H01L25/04—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, H10D, H10F, H10H, H10K or H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
- H01L25/07—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, H10D, H10F, H10H, H10K or H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group subclass H10D
- H01L25/072—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, H10D, H10F, H10H, H10K or H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group 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
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
-
- 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
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/34—Snubber circuits
- H02M1/348—Passive dissipative snubbers
-
- 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
- H02M7/5387—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 in a bridge configuration
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L24/34—Strap connectors, e.g. copper straps for grounding power devices; Manufacturing methods related thereto
- H01L24/39—Structure, shape, material or disposition of the strap connectors after the connecting process
- H01L24/41—Structure, shape, material or disposition of the strap connectors after the connecting process of a plurality of strap connectors
Definitions
- the present invention relates to the structure of a power semiconductor module, and particularly relates to a technique that is effective when applied to a power semiconductor module equipped with a snubber capacitor.
- the power conversion device has functions such as AC-DC conversion, DC-AC conversion, frequency conversion of AC power, and voltage conversion of DC power.
- the power conversion device includes a power conversion circuit that converts power by turning on and off a power semiconductor module having a switching function.
- a 1-in-1 module has one or more switching elements (semiconductor elements) connected in parallel on the wiring pattern of the insulating substrate, or two switching elements are connected in series inside the module to form a half-bridge circuit.
- switching elements semiconductor elements
- the wiring inductance of the main circuit is, for example, in the case of a half-bridge circuit, the circuit of the power conversion main circuit that starts from the DC smoothing capacitor, passes through the upper arm switching element and the lower arm switching element, and returns to the DC smoothing capacitor. This is the wiring inductance of the loop. If the surge voltage exceeds the rated voltage of the power semiconductor module, an overvoltage failure may occur, so the surge voltage must be kept below the rated voltage.
- the snubber capacitor may be mounted on an insulating substrate on the metal base inside the power semiconductor module, but in that case, mounting the snubber capacitor reduces the mounting space for the switching elements, so the number of mounted switching elements must be increased. This becomes an obstacle when it is desired to increase the power density of the power semiconductor module.
- Patent Document 1 discloses a method in which a snubber capacitor is sandwiched between a positive terminal and a negative terminal in a power semiconductor module, thereby achieving both high power density in a power semiconductor module and suppression of surge voltage by incorporating a snubber capacitor. is proposed.
- Patent Document 1 has a structure in which a snubber capacitor is sandwiched between a positive electrode terminal and a negative electrode terminal, the snubber capacitor There were concerns that the system would overheat and eventually break down.
- an object of the present invention is to provide a power semiconductor module that can achieve both high current density and prevention of heating of the snubber capacitor in a power semiconductor module equipped with a snubber capacitor, and a motor drive system using the same.
- the present invention provides a positive electrode terminal, a negative electrode terminal disposed at least partially overlapping the positive electrode terminal when viewed in plan, and a first wiring branched from the positive electrode terminal.
- a second wiring branched from the negative terminal is arranged outside a position where the positive terminal and the negative terminal overlap when viewed in plan, and is connected to the first wiring and the second wiring via the second wiring.
- a snubber capacitor connected to the snubber capacitor.
- a power semiconductor module equipped with a snubber capacitor it is possible to realize a power semiconductor module that can achieve both high current density and prevention of heating of the snubber capacitor, and a motor drive system using the power semiconductor module.
- FIG. 1 is a cross-sectional view showing the internal structure of a power semiconductor module according to Example 1 of the present invention.
- 2 is an enlarged view of a mounting portion of the snubber capacitor 14 in FIG. 1.
- FIG. 3 is a diagram conceptually showing the flow of current in FIG. 2.
- FIG. FIG. 2 is a plan view of the power semiconductor module of FIG. 1; 2 is an equivalent circuit diagram of a half-bridge circuit configured using the power semiconductor module of FIG. 1.
- FIG. 6 is a diagram showing simulation results of switching waveforms in the circuit configuration of FIG. 5.
- FIG. (without snubber capacitor) 6 is a diagram showing simulation results of switching waveforms in the circuit configuration of FIG. 5.
- FIG. 3 is a plan view of a power semiconductor module according to Example 2 of the present invention.
- 9 is an equivalent circuit diagram of a half-bridge circuit configured using the power semiconductor module of FIG. 8.
- FIG. FIG. 3 is a plan view of a power semiconductor module according to Example 3 of the present invention.
- 11 is a perspective view of a mounting portion of the first snubber capacitor 14 and the second snubber capacitor 32 inside the power semiconductor module of FIG. 10.
- FIG. 11 is an equivalent circuit diagram inside the power semiconductor module of FIG. 10.
- FIG. FIG. 4 is a configuration diagram of a motor drive system according to a fourth embodiment of the present invention.
- FIGS. 1 to 7 A power semiconductor module according to Example 1 of the present invention will be described with reference to FIGS. 1 to 7.
- the structure of the power semiconductor module of this embodiment will be explained using FIGS. 1 to 4.
- FIG. 5 an equivalent circuit diagram when a half-bridge circuit is constructed using the power semiconductor module of this example will be described.
- the surge voltage reduction effect at turn-off according to the present invention in the circuit configuration of FIG. 5 will be explained using FIGS. 6 and 7.
- FIG. 1 is a cross-sectional view showing the internal structure of the power semiconductor module 1 of this embodiment.
- the power semiconductor module 1 of this embodiment is a so-called 2-in-1 module.
- the power semiconductor module 1 of this embodiment includes an upper arm insulating substrate 3, a lower arm insulating substrate 4, and an upper arm insulating substrate 5 on a metal base 2 for heat dissipation. and the insulator substrate 6 of the lower arm are joined with solder 7, respectively.
- the insulating substrates 3 and 4 and the insulator substrates 5 and 6 each include a metal layer 8, an insulating layer 9, and a wiring pattern 10.
- a switching element SW11 (not shown in FIG. 1), a switching element SW12, a diode D11 (not shown in FIG. 1), a diode D12, and a solder 7 are arranged. are joined with.
- materials such as sintered copper may be used as the bonding material.
- the switching elements SW11, SW12 and the high potential side electrodes of the diodes D11, D12 are electrically connected by the wiring pattern 10, and the low potential side electrodes (here, between the emitter electrode and (between the cathode electrodes) are electrically connected by bonding wires 11 (see FIG. 4).
- a switching element SW21 (not shown in FIG. 1), a switching element SW22, a diode D21 (not shown in FIG. 1), a diode D22, and a solder 7 are arranged. are joined with.
- materials such as sintered copper may be used as the bonding material.
- the switching elements SW21, SW22 and the high potential side electrodes (here, between the collector electrode and the anode electrode) of the diodes D21, D22 are electrically connected by the wiring pattern 10, and the low potential side electrodes (here, between the emitter electrode and (between the cathode electrodes) are electrically connected by bonding wires 11 (see FIG. 4).
- switching elements SW11, SW12, SW21, and SW22 in addition to the illustrated IGBT (Insulated Gate Bipolar Transistor), MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor), etc. are applied.
- IGBT Insulated Gate Bipolar Transistor
- MOSFET Metal-Oxide-Semiconductor Field Effect Transistor
- D11, D12, D21, and D22 SBDs (Schottky Barrier Diodes) or the like may be used in addition to pn junction diodes.
- the semiconductor material constituting the switching elements SW11, SW12, SW21, SW22 and the diodes D11, D12, D21, D22 may be Si or a wide gap semiconductor such as SiC.
- parasitic diodes (body diodes) of the MOSFETs may be used as the diodes D11, D12, D21, and D22.
- the insulating board 3 of the upper arm has a positive terminal (first positive terminal) P1
- the insulating board 4 of the lower arm has a negative terminal (first negative terminal) N1
- the insulating board 5 of the upper arm has an upper
- the gate auxiliary terminal G1AUX of the arm, the emitter auxiliary terminal E1AUX of the upper arm, and the gate auxiliary terminal G2AUX of the lower arm and the emitter auxiliary terminal E2AUX of the lower arm are ultrasonically bonded to the respective wiring patterns 10 on the insulator board 6 of the lower arm. be done.
- the joining method may be other methods such as solder joining.
- the entire power semiconductor module 1 is housed in a resin casing (not shown), and the inside thereof is sealed with gel 47.
- the sealing material may be made of another material such as resin.
- the negative electrode terminal N1 is arranged so that at least a part thereof overlaps the positive electrode terminal P1 when viewed from above, and the interval between both terminals is designed to be as short as possible while ensuring an insulation distance. This is because by arranging both terminals in which currents flow in opposite directions to each other and facing each other and close to each other, the magnetic fluxes generated by the currents flowing in each terminal cancel each other out, thereby reducing the wiring inductance of both terminals.
- a first bus bar 12 branched from the negative terminal N1 and a second bus bar 12 branched from the positive terminal P1 are arranged to overlap the positive terminal P1 when viewed in plan as shown in FIG.
- a snubber capacitor (first snubber capacitor) 14 is connected through the bus bar 13 outside the position where the positive terminal P1 and the negative terminal N1 overlap when viewed from above.
- the snubber is installed at a position where the positive terminal P1 and the negative terminal N1, which generate heat due to current flow, do not overlap, that is, outside the position where the positive terminal P1 and the negative terminal N1 overlap when the power semiconductor module 1 is viewed from above.
- the capacitor 14 By connecting the capacitor 14, it is possible to prevent the temperature of the snubber capacitor 14 from increasing excessively due to heating from the positive terminal P1 and the negative terminal N1.
- the first bus bar 12 and the negative terminal N1 and the second bus bar 13 and the positive terminal P1 are connected by screws 15, respectively.
- the connection between the bus bar and the terminal may be made by other methods that allow electrical connection, such as soldering instead of the screws 15.
- the capacitance of the snubber capacitor 14 is on the order of several tens of nF to several hundred nF, which is about one thousandth or less of a DC smoothing capacitor (not shown) connected externally to the power semiconductor module 1. Since the current flowing through the first bus bar 12 and the second bus bar 13 is also sufficiently smaller than that between the positive terminal P1 and the negative terminal N1, the amount of heat generated by the current is also is sufficiently small compared to the negative electrode terminal N1, and the heating to the snubber capacitor 14 from the first bus bar 12 and the second bus bar 13 is small.
- snubber capacitor 14 a chip-type ceramic capacitor, thin film capacitor, film capacitor, etc. is used.In order to suppress the surge voltage at turn-off, a material with good high frequency characteristics or a heat resistant material is used to withstand the high temperature operation of the power semiconductor module 1. Those with high properties are preferable.
- first bus bar 12 and the second bus bar 13 do not need to be bus bars as long as they can electrically connect the positive terminal P1 and the negative terminal N1 to the snubber capacitor 14.
- a first wiring pattern and a second wiring pattern are provided on an insulating substrate, the snubber capacitor 14 is connected between one of the first wiring patterns and one of the second wiring patterns, and the snubber capacitor 14 is connected between one of the first wiring patterns and one of the second wiring patterns.
- the other wiring pattern may be connected to the positive terminal P1, and the other wiring pattern may be connected to the negative terminal N1.
- FIG. 2 is an enlarged view of the mounting portion of the snubber capacitor 14 in FIG. 1.
- connection portion between the snubber capacitor 14 and the first bus bar 12 and the connection portion between the snubber capacitor 14 and the second bus bar 13 are connected to the same main surface of the snubber capacitor 14 ( In FIG. 2, it is placed on the bottom surface).
- thermal stress generated at the solder joint between the snubber capacitor 14 and the bus bar may increase.
- thermal stress (compressive stress) 18 is generated in the solder joint.
- a bent portion 16 is provided on the second bus bar 13.
- the bent portion 16 deforms in the horizontal direction 19, thereby reducing the thermal stress 18 and preventing cracks in the solder joint.
- the bent portion 16 may be provided in the horizontal direction of the bus bar in order to reduce thermal stress in the horizontal direction of the bus bar, or may be provided on the first bus bar 12 depending on the wiring structure of the bus bar.
- FIG. 3 is a diagram conceptually showing the flow of current in FIG. 2.
- FIG. 4 is a plan view of the power semiconductor module 1 of FIG. 1.
- the first bus bar 12 is provided to branch from the negative electrode terminal N1
- the second bus bar 13 is provided to branch from the positive electrode terminal P1.
- FIG. 5 is an equivalent circuit diagram of a half-bridge circuit configured using the power semiconductor module 1 of FIG. 1.
- a DC smoothing capacitor 26 and a DC power supply 24 are connected in parallel between the positive terminal P1 and the negative terminal N1 of the power semiconductor module 1 outside the module. Further, a load inductance 28 is connected between the positive terminal P1 and the AC terminal (first AC terminal) AC1. Snubber capacitor 14 is connected between positive terminal P1 and negative terminal N1 inside the module.
- the snubber capacitor 14 is located closer to the leg consisting of the switching elements (SW11 and SW12) of the upper arm and the switching elements (SW21 and SW22) of the lower arm, thereby realizing turn-off switching. Since the wiring inductance 25 of the main circuit becomes smaller by the amount of current flowing through the snubber capacitor 14, the surge voltage at the time of turn-off switching can be reduced.
- FIG. 6 is a diagram showing simulation results of switching waveforms in the circuit configuration of FIG. 5 without a snubber capacitor.
- a surge voltage of 550V is applied to the lower arm collector-emitter voltage VceL in addition to the DC power supply voltage Vcc of 1200V, and it has jumped to around 1750V.
- FIG. 7 is a diagram showing simulation results of switching waveforms when the capacitance of the snubber capacitor 14 is set to 50 nF in the circuit configuration of FIG. 5.
- the wiring inductance 25 of the main circuit becomes smaller by the amount of current flowing through the snubber capacitor 14 during switching, and the surge voltage can be reduced. It has been reduced to 300V, compared to 550V in the case.
- Example 2 of the present invention A power semiconductor module according to Example 2 of the present invention will be described with reference to FIGS. 8 and 9. In addition, below, mainly the points different from Example 1 will be explained.
- FIG. 8 is a plan view of the power semiconductor module 1 of this example, and corresponds to a modification of Example 1 (FIG. 4).
- two snubber capacitors 14 are arranged symmetrically with respect to a virtual center line 23 between the positive terminal P1 and the negative terminal N1.
- This circulating current can be suppressed by arranging the snubber capacitor 14 at a position where the wiring inductance 25 is equal from each switching element connected in parallel. For example, as shown in FIG. 8, this can be suppressed by arranging the plurality of snubber capacitors 14 symmetrically with respect to a virtual center line 23 between the positive terminal P1 and the negative terminal N1.
- FIG. 9 is an equivalent circuit diagram of a half-bridge circuit configured using the power semiconductor module 1 of FIG. 8.
- the combined capacitance of the snubber capacitors 14 increases due to the parallel connection of the plurality of snubber capacitors 14, and the effect of suppressing surge voltage can be enhanced.
- Example 3 of the present invention A power semiconductor module according to Example 3 of the present invention will be described with reference to FIGS. 10 to 12. In addition, below, mainly the points different from Example 1 will be explained.
- FIG. 10 is a plan view of the power semiconductor module 1 of this example, and corresponds to a modification of Example 1 (FIG. 4).
- the positive terminal has a first positive terminal P1 and a second positive terminal P2
- the negative terminal has a first negative terminal P1 and a second positive terminal P2.
- N1 and a second negative terminal N2 when the power semiconductor module 1 is viewed from above, at least a portion of the first positive terminal P1 and the first negative terminal N1 are arranged to overlap, and the second At least a portion of the positive electrode terminal P2 and the second negative electrode terminal N2 are arranged to overlap.
- the snubber capacitor includes a first snubber capacitor 14 electrically connected between the first positive terminal P1 and the second negative terminal N2, and a first snubber capacitor 14 electrically connected between the second positive terminal P2 and the first negative terminal N1. and a second snubber capacitor 32 electrically connected between the two.
- the first positive terminal P1 and the second positive terminal P2 and the first negative terminal N1 and the second negative terminal N2 are electrically connected by a bus bar or the like outside the module (not shown). be done. That is, since the first positive terminal P1 and the second positive terminal P2 and the first negative terminal N1 and the second negative terminal N2 have the same potential, the first snubber capacitor 14 and the second snubber capacitor 14 The capacitors 32 are connected in parallel.
- FIG. 11 is a perspective view of the mounting portion of the first snubber capacitor 14 and the second snubber capacitor 32 inside the power semiconductor module 1 of FIG. 10.
- a current path from the first positive terminal P1 to the second negative terminal N2 via the first snubber capacitor 14, and The current path from the first negative terminal N1 to the first negative terminal N1 via the second snubber capacitor 32 may be made substantially parallel to each other.
- the direction of the current Isnu1 flowing through the first snubber capacitor 14 and the direction of the current Isnu2 flowing through the second snubber capacitor 32 are opposite, so that the magnetic flux created by the mutually flowing currents cancels out,
- the wiring inductance of the first bus bar 12, the second bus bar 13, the first snubber capacitor 14, and the second snubber capacitor 32 can be reduced.
- FIG. 12 is an equivalent circuit diagram inside the power semiconductor module 1 of FIG. 10.
- the first positive terminal P1 and the second positive terminal P2 are electrically connected via a bus bar 34 outside the module.
- the first negative terminal N1 and the second negative terminal N2 are electrically connected via the bus bar 35 outside the module. Therefore, as described above, the first snubber capacitor 14 and the second snubber capacitor 32 are connected in parallel.
- the loop path between the snubber capacitors and the switching elements of the upper and lower arms will straddle the left and right insulating substrates.
- the first snubber capacitor 14 it passes through the first snubber capacitor 14, the switching elements SW11 and SW12 on the upper arm of the left insulating substrate 3, and the switching elements SW21 and SW22 on the lower arm of the left insulating substrate 4.
- a loop path returns to the first snubber capacitor 14.
- bonding wires 33 are provided to connect the emitter electrodes of the insulating substrates 4 of the left and right lower arms, that is, the first negative terminal N1 and the second negative terminal N2.
- the wiring inductance 36 (see FIG. 12) of the bonding wire 33 connects the emitter electrodes of the insulating substrates 4 of the left and right lower arms with low inductance.
- FIG. 13 is a configuration diagram of the motor drive system 37 of this embodiment.
- the motor drive system 37 of this embodiment drives the motor 38 with AC power output from the power conversion device 39.
- the power conversion device 39 includes a three-phase inverter main circuit configured by three power semiconductor modules 1 (2-in-1 modules) each having a set of upper and lower arms, and a DC inverter connected to the DC side of the three-phase inverter main circuit. It includes a power supply 24, a gate drive circuit 27 that drives the power semiconductor module 1, and a controller 40 that outputs a PWM signal to the gate drive circuit 27.
- any of the power semiconductor modules of the aforementioned embodiments 1 to 3 is applied.
- the motor 38 is a three-phase AC motor, and each phase of the motor 38 is connected to an AC terminal (for example, "AC1" in FIG. 1) of the power semiconductor module 1.
- the power semiconductor module 1 can have a high power density and reduce loss by suppressing surge voltage during turn-off switching. This makes it possible to make the power converter 39 smaller and have lower loss.
- the present invention is not limited to the embodiments described above, and includes various modifications.
- the embodiments described above are described in detail to explain the present invention in an easy-to-understand manner, and the present invention is not necessarily limited to having all the configurations described.
- SYMBOLS 1 Power semiconductor module, 2...Metal base, 3...Insulating substrate of upper arm, 4...Insulating substrate of lower arm, 5...Insulator board of upper arm, 6...Insulator board of lower arm, 7...Solder, 8 ...metal layer, 9...insulating layer, 10...wiring pattern, 11...bonding wire, 12...first bus bar, 13...second bus bar, 14...(first) snubber capacitor, 15...screw, 16...bending Part, 17... Vertical direction, 18... Thermal stress (direction), 19... Horizontal direction, 20... Direction of current flowing through positive electrode terminal P1, 21... Direction of current flowing through negative electrode terminal N1, 22... Gate Electrode, 23...
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Abstract
Description
また、正極端子P1と交流端子(第1の交流端子)AC1との間には、負荷インダクタンス28が接続される。スナバコンデンサ14は、モジュール内部で正極端子P1と負極端子N1との間に接続される。
Claims (13)
- 正極端子と、
平面視した際に少なくとも一部が前記正極端子に重なって配置された負極端子と、
前記正極端子から分岐された第1の配線と、
前記負極端子から分岐された第2の配線と、
平面視した際の前記正極端子と前記負極端子とが重なる位置の外側に配置され、前記第1の配線と前記第2の配線とを介して接続されたスナバコンデンサと、
を有することを特徴とするパワー半導体モジュール。 - 請求項1に記載のパワー半導体モジュールにおいて、
前記第1の配線と前記第2の配線は、バスバーまたは絶縁基板上に設けられた配線パターンであることを特徴とするパワー半導体モジュール。 - 請求項1に記載のパワー半導体モジュールにおいて、
前記正極端子と前記第1の配線、および前記負極端子と前記第2の配線は、それぞれネジで接続されていることを特徴とするパワー半導体モジュール。 - 請求項1に記載のパワー半導体モジュールにおいて、
前記スナバコンデンサと前記第1の配線との接続部、および前記スナバコンデンサと前記第2の配線との接続部は、前記スナバコンデンサの同じ主面上に配置されていることを特徴とするパワー半導体モジュール。 - 請求項1に記載のパワー半導体モジュールにおいて、
前記第1の配線と前記第2の配線の少なくとも何れか一方に屈曲部を有することを特徴とするパワー半導体モジュール。 - 請求項1に記載のパワー半導体モジュールにおいて、
前記正極端子と前記第1の配線に流れる電流の向きが互いに逆方向であり、
前記負極端子と前記第2の配線に流れる電流の向きが互いに逆方向であることを特徴とするパワー半導体モジュール。 - 請求項6に記載のパワー半導体モジュールにおいて、
前記第1の配線は、前記正極端子と略平行な部分を有し、
前記第2の配線は、前記負極端子と略平行な部分を有することを特徴とするパワー半導体モジュール。 - 請求項1に記載のパワー半導体モジュールにおいて、
前記スナバコンデンサを複数有し、
前記複数のスナバコンデンサは、前記正極端子もしくは前記負極端子の仮想的な中心線を境に対称配置されていることを特徴とするパワー半導体モジュール。 - 請求項1に記載のパワー半導体モジュールにおいて、
前記正極端子は、第1の正極端子と第2の正極端子とを有し、
前記負極端子は、第1の負極端子と第2の負極端子とを有し、
平面視した際に、前記第1の正極端子と前記第1の負極端子との少なくとも一部が重なって配置され、
前記第2の正極端子と前記第2の負極端子との少なくとも一部が重なって配置されていることを特徴とするパワー半導体モジュール。 - 請求項9に記載のパワー半導体モジュールにおいて、
前記スナバコンデンサは、前記第1の正極端子と前記第2の負極端子との間に電気的に接続された第1のスナバコンデンサと、前記第2の正極端子と前記第1の負極端子との間に電気的に接続された第2のスナバコンデンサと、を有することを特徴とするパワー半導体モジュール。 - 請求項10に記載のパワー半導体モジュールにおいて、
前記第1の正極端子から前記第1のスナバコンデンサを経由して前記第2の負極端子に至る電流経路と、前記第2の正極端子から前記第2のスナバコンデンサを経由して前記第1の負極端子に至る電流経路とが、略平行な部分を有することを特徴とするパワー半導体モジュール。 - 請求項9に記載のパワー半導体モジュールにおいて、
前記パワー半導体モジュール内部で前記第1の負極端子と前記第2の負極端子間を接続する配線を有することを特徴とするパワー半導体モジュール。 - 請求項1から請求項12の何れか1項に記載のパワー半導体モジュールを用いたモータ駆動システム。
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| WO2015037203A1 (ja) * | 2013-09-10 | 2015-03-19 | 株式会社デンソー | 電力変換装置 |
| WO2016084241A1 (ja) * | 2014-11-28 | 2016-06-02 | 日産自動車株式会社 | ハーフブリッジパワー半導体モジュール及びその製造方法 |
| JP2020099124A (ja) * | 2018-12-18 | 2020-06-25 | 日立ジョンソンコントロールズ空調株式会社 | 電力変換装置、及び、これを備える冷凍サイクル装置 |
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| WO2015037203A1 (ja) * | 2013-09-10 | 2015-03-19 | 株式会社デンソー | 電力変換装置 |
| WO2016084241A1 (ja) * | 2014-11-28 | 2016-06-02 | 日産自動車株式会社 | ハーフブリッジパワー半導体モジュール及びその製造方法 |
| JP2020099124A (ja) * | 2018-12-18 | 2020-06-25 | 日立ジョンソンコントロールズ空調株式会社 | 電力変換装置、及び、これを備える冷凍サイクル装置 |
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