GB2539537B

GB2539537B - Power conversion device

Info

Publication number: GB2539537B
Application number: GB1606519.5A
Authority: GB
Inventors: Mae Kentarou; Nakata Kiyoshi; Ishikawa Katsumi
Original assignee: Hitachi Ltd
Current assignee: Hitachi Ltd
Priority date: 2015-05-19
Filing date: 2016-04-14
Publication date: 2019-10-30
Anticipated expiration: 2036-04-14
Also published as: DE102016208273A1; DE102016208273B4; GB2539537A; JP2016220356A; CN106169876B; CN106169876A; JP6397795B2

Description

POWER CONVERSION DEVICE

BACKGROUND OF THE INVENTION 1. Field of the Invention

The present invention relates to a power conversion device using a semiconductor element and relates to wiring structures of a main circuit and a control circuit thereof. 2. Description of the Related Art

In a main circuit of a power conversion device using a semiconductor element, a main object is to suppress a surge voltage and a structure in which a switching module having the semiconductor element and a smoothing capacitor are electrically connected and wiring lines providing an input direct-current voltage as a three-phase alternating-current voltage output are laminated with an insulation sheet therebetween to form a bus bar is mainly used. An example thereof is disclosed in JP-2GG8-245451-A.

Similarly, in a control circuit, a switching module and a control circuit board are electrically connected and wiring lines to transmit a signal voltage are configured as plate- like conductors to reduce inductance and are laminated with an insulation sheet therebetween. An example thereof is disclosed in JP-61-227661-A.

SUMMARY OF THE INVENTION

However, as disclosed in JP-61-227661-A, when the wiring lines, to transmit the signal voltage are configured as the plate-like conductors, it is necessary to fix the wiring lines to a reinforcement member and increase rigidity, to enable the wiring lines to endure a vibration of the power conversion device, which results in obstructing size reduction and. weight reduction of the device. In addition, it is necessary to fix a main circuit bus bar and a control circuit, bus bar to the switching modules by screw fastening and assemblability is bad.

The present invention has been made in view of the above circumstances and an aim of the present invention is to provide a power conversion device that can realize size reduction and weight reduction and has superior assemblability. A power conversion device includes: a plurality of switching modules which configure upper and lower arm elements corresponding to three phases; a smoothing capacitor which is connected between a direct-current power supply and the switching modules; a control circuit board which outputs an electric signal to control ON/OFF of the switching modules; a plate-like P-pole conductor which electrically connects a high potential side of the smoothing capacitor and positive electrode terminals of the upper arm elements of the plurality of switching modules; a plate-like N-pole conductor which electrically connects a lower potential side of the smoothing capacitor and negative electrode terminals of the lower arm elements of the plurality of switching modules; plate-like M-pole conductors which are electrically connected to the negative electrode terminals of the upper arm elements and the positive electrode terminals of the lower arm elements and output an alternating-current voitage to a load; plate-like G-pole conductors which electrically connect gate control terminals of the plurality of switching modules and the control circuit board; and plate-like E-pole conductors which electrically connect negative electrode control terminals of the plurality of switching modules and the control circuit board, wherein the P-pole conductor, the N-pole conductor, the M-pole conductors, the G-pole conductors, and the E-pole conductors are laminated with insulation materials therebetween, are bonded to each other, and are fixed as an integrated conductor member to the switching modules and the smoothing capacitor.

According to the present invention, size reduction or weight reduction can be realized by supporting a control circuit bus bar by a main circuit bus bar and removing a reinforcement member for the control circuit bus bar, the number1 of attachment components of the main circuit bus bar and the control circuit bus bar can be reduced, and assemblability can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. I is a diagram illustrating a configuration of a power conversion device according to a first embodiment of the present invention,-

Fig. 2 is a diagram illustrating an electric circuit configuration of the power conversion device according to the first embodiment of the present invention;

Fig. 3 is a diagram illustrating a configuration of an integrated bus bar according to the first embodiment of the present invention;

Fig. 4 is a diagram illustrating a conductor configuration of a main circuit bus bar according to the first embodiment of the present invention;

Fig. 5 is a diagram illustrating an insulation sheet configuration of the main circuit bus bar according to the first embodiment of the present invention;

Fig. 6 is a diagram illustrating a conductor configuration of a control circuit bus bar according to the first embodiment of the present invention;

Fig. 7 is a diagram illustrating an insulation sheet configuration of the control circuit bus bar according to the first embodiment of the present invention;

Fig. 8 is a diagram illustrating an arrangement relation of M-pole conductors and the control circuit bus bar according to the first embodiment of the present invention; and

Fig. 9 is a diagram illustrating a configuration of a power conversion device according to a second embodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings .

First embodiment A structure and an electric circuit configuration of a power conversion device according to the present invention are illustrated in Figs. 1 and 2. As illustrated in Fig. 2, the power conversion device has a smoothing capacitor 4 that is connected between a P~pole terminal 901 of a positive-side voltage and an N-poIe terminal 911 of a negative-side voltage of an input voltage and smoothes the input voltage, switching modules 21 to 26 that output any one of the positive-side voltage and the negative-side voltage using a voltage of the smoothing capacitor 4 as power, and a control circuit board 3 that outputs a control signal, to control terminals of the switching modules 21 to 2 6 and controls a switching operation. Each of the switching modules 21 to 26 includes a switching element such as an IGBT and Sic that circulates a current in one direction and a diode that is connected in parallel to the switching element and circulates the current in a direction reverse to a circulation direction of the switching element. However, when the switching element is configured using SiC having a body diode, a function of the diode is realized by the body diode. For this reason, it is not essential to include the diode. A collector terminal of the switching module 21 and an emitter terminal of the switching module 22 are connected and the switching module 21 and the switching module 22 are connected in series to configure one phase of the power conversion device and a connection point thereof is connected to an M-pole terminal 921 for the load connection. Likewise, the switching modules 23 and 24, and the switching modules 25 and 26 are each connected in series to configure one phase.

As illustrated in Fig. 1, each of the switching modules 21 to 26 has a collector terminal 702, an emitter terminal 712, a gate control terminal 731, and an emitter control terminal 741. An integrated bus bar 1 functions as a wiring line to electrically connect each terminal of the switching modules 21 to 26 and the control circuit board 3 and the smoothing capacitor 4 or a direct-current power supply, A direct-current voltage is input between the P-pole terminal 901 for the power supply connection and the N-pole terminal 911 for the power supply connection included in the integrated bus bar 1 and the integrated bus bar 1 is connected to a load such as a motor by the M-pole terminal 921 for the load connection and outputs a three-phase alternating-current voltage. In addition, the control circuit board 3 is connected to a G-pole terminal 932 for the control circuit connection and an E-pole terminal 942 for the control circuit connection in the integrated bus bar 1 and a control signal voltage is transmitted to the switching modules 21 to 26. The G-pole terminal 932 for the control circuit connection is connected to the gate control terminal 731 of the switching module and the E-pole terminal 942 for the control circuit connection is connected to the emitter control terminal 741 of the switching module.

Fig. 3 illustrates a configuration of the integrated bus bar 1. As illustrated in Fig. 3, the integrated bus bar 1 includes a main circuit bus bar 11 and a control circuit bus bar 12 and the main circuit bus bar 11 and the control circuit bus bar 12 are sequentially bonded from a front side to a rear side with an insulation material therebetween. That is, the main circuit bus bar 11 is disposed at a side (front side) distant from the switching module and the control circuit bus bar 12 is disposed at a side (reax" side) close to the switching module. As the insulation material, an adhesive material or a double-sided tape is used. By performing the bonding as described above, the main circuit bus bar 11 and the control circuit bus bax- 12 to be individual components in the related art can be integrated into a single component and the number of components can be reduced. Because the main circuit bus bar 11 flows a current larger than a current flown by the control circuit bus bar 12, the main circuit bus bar 11 is configured using a metal plate having a relatively large thickness. For this reason, because the main circuit bus bar 11 can support the control circuit bus bar 12 having relatively small strength, a reinforcement member for the control circuit bus bar 12 can be removed.

Fig. 4 illustrates a configuration of conductors of the main circuit bus bax* 11, As illustrated in Fig. 4, the conductors of the main circuit bus bar 11 include a P-pole conductor 111, an N-pole conductor 112, and M-pole conductors 113 to 115 and the P-pole conductor 111, the N~ pole conductor 112, and the M-pole conductors 113 to 115 are sequentially laminated from the front side to the rear side. That is, the P-pole conductor 111, the N-pole conductor 112, and the M-pole conductors 113 to 115 are sequentially laminated from the side (front side) distant from the switching module to the side (rear side) close to the switching module.

The P-pole conductor 111 is a plate-like conductor including the P-pole terminal 901 for the power supply connection and P-pole terminals 902 for the module, connection, is connected to the positive voltage side of the direct-current power supply via the P-pole terminal 901 for the power supply connection, and is connected to the collector terminal 702 of each of the switching modules 21, 23, and 25 via the P-pole terminals 902 for the module connection ,

The N-pole conductor 112 is a plate-like conductor including the N-pole terminal 911 for the power supply connection, N-pole terminals 912 for the module connection, and through-holes 811, 812, 813, and 814 of the N-pole conductor, is connected to the negative voltage side of the direct-current power supply via the N-pole terminal 911 for the power supply connection, and is connected to the emitter terminal 712 of each of the switching modules 22, 24, and 26' via the N-pole terminals 912 for the module connection.

The M-pole conductors 113, 114, and 115 are disposed on the same plane and each of the M-pole conductors 113, 114, and 115 is a plate-like conductor including an M-pole terminal 921 for the load connection, M-pole terminals 922 and 923 for the module connection, and through-holes 821 and 822 of the M-pole conductor. In addition, the M-pole conductor 113 is connected to a load via the M-pole terminal 921 for the load connection, is connected to the emitter terminal 712 of the switching module 21 via the M-pole terminal 922 for the module connection, and is connected to the collector terminal 702 of the switching module 22 via the M-pole terminal 923 for the module connection. Likewise, the M-pole conductor 114 is connected to a load via the M-pole terminal 921 for the load connection, is connected to the emitter terminal 712 of the switching module 23 via the M-pole terminal 922 for the module connection, and is connected to the collector terminal 702 of the switching module 24 via the M-pole terminal 923 for the module connection. Likewise, the M- pole conductor 115 is connected to a load via the M-pole terminal 921 for the load connection, is connected to the emitter terminal 712 of the switching module 25 via the M-pole terminal 922 for the module connection, and is connected tc· the collector terminal 7 02 of the switching module 26 via the M-pole terminal 923 for the module connection.

The plurality of P-pole terminals 902 for the module connection provided in the P-pole conductor 111 are connected to the collector terminals 702 of the switching modules 21, 23, and 25 of the positive voltage side via spaces of the through-holes 811 of the N-pole conductor and the through-holes 821 of the M-pole conductor. Meanwhile, the plurality of N-pole terminals 912 for the module connection provided in the N-pole conductor 112 are connected to the emitter terminals 712 of the switching modules 22, 24, and 26 of the negative voltage side via a space below the M-pole conductor. In addition, the plurality of M-pole terminals 922 provided in the M-pole conductors 113, 114, and 115 are connected to the emitter terminals 712 of the switching modules 21, 23, and 25 of the positive voltage side and the plurality of M-pole terminals 923 are connected to the collector terminals 702 of the switching modules 22, 24, and 26 of the negative voltage side. The through-holes 812 and 813 are provided at the corresponding positions of the N-pole conductor, such that the. plurality of M-pole terminals 922 and 923 can be connected to the switching modules 21 and 22 from the front side by screw fastening. A configuration of the insulation sheets in the main circuit bus bar 11 is illustrated in Fig. 5. The main circuit insulation sheets 116, 117, 118, and 119 are alternately laminated from the side (front side) distant from the switching module to the side (rear side) close to the switching module, with the P-pole conductor 111, the N-pole conductor 112, and the M-pole conductors 113 to 115 therebetween. That is, the main circuit insulation sheet 116 is disposed at the front side of the P-pole conductor 111, the main circuit insulation sheet 117 is disposed between the P-pole conductor 111 and the N-pole conductor 112, the main circuit insulation sheet 118 is disposed between the N-pole conductor 112 and the M-pole conductors 113 to 115, and the main circuit insulation sheet 119 is disposed at the rear side of the M-pole conductors 113 to 115 .

As illustrated in Fig. 5, because circular through-holes 831 and 832 are provided at the positions corresponding to the individual terminal of the switching modules in the main circuit insulation sheets, each terminal of the main circuit bus bar 11 and the terminal of the switching module, and each terminal of the control circuit bus bar 12 and the terminal, of the switching module can be connected by a screw and a driver can be inserted from the front side. In addition, ends of the through-holes of the conductors can be sealed by the through-holes 831 and 832 and an insulation property can be increased.

Next, a conductor configuration of the control circuit bus bar is illustrated in Fig. 6. As illustrated in Fig. 6, conductors of the control circuit bus bar 12 include G-pole conductors 121 to 126 and E-pole conductors 127 to 132 disposed on the same plane and the E-pole conductors 127 to 132 and the G-pole conductors 121 to 126 are sequentially laminated from the side (front side) distant from the switching module to the side (rear side) close to the switching module.

Here, E-pole terminals 941 for the module connection in the E-pole conductors 127, 129, and 131 are connected to the emitter control terminals 741 of the switching modules 21, 23, and 25 of the positive voltage side and the E-pole terminals 941 for the module connection in the E-pole conductors 128, 130, and 132 are connected to the emitter control terminals 741 of the switching modules 22, 24, and 26 of the negative voltage side. In addition, G-pole terminals 931 for the module connection in the G-pole conductors 121, 123, and 125 are connected to the gate control terminals 731 of the switching modules 21, 23, and 25 of the positive voltage side and the G-pole terminals 931 for the module connection in the G-pole conductors 122, 124, and 126 are connected to the gate control terminals 731 of the switching modules 22, 24, and 26 of the negative voltage side.

Because the E-pole conductors 127, 129, and 131 and the M-pole conductors 113, 114, and 115 have the same potential, the M-pole conductors 113 to 115 of the main circuit bus bar 11 are adjacent to the E-pole conductors of the control circuit bus bar 12 with the insulation sheet therebetween. A function and an effect will be described in detail below. According to this arrangement, occurrence of insulation breakdown and a noise due to a high field, feared between the main circuit bus bar 11 and the control circuit bus bar 12, can be suppressed.

Because the through-hole 814 of the N-pole conductor, the through-hole 822 of the M-pole conductor, and the through-hole 832 of the main circuit insulation sheet are provided at the positions corresponding to the gate control terminals and the emitter control terminals of the switching modules 21, 23, and 25, the E-pole terminal 941 for the module connection and the G-pole terminal 931 for the module connection can be fastened to the individual switching modules by screws from the front side. A configuration of the insulation sheets in the control circuit bus bar 12 is illustrated in Fig. 7.

Control circuit insulation sheets 133 to 135 are alternately laminated from the side (front side) distant from, the switching module to the side (rear side) close to the switching module, with the E-poie conductors 127 to 132 and the G-pole conductors 121 to 12 S therebetween. That is, the control circuit, insulation sheet 13 3 is disposed at the front side of the E-pole conductor, the control circuit insulation sheet 134 is disposed between the E-pole conductor and the G-pole conductor, and the control circuit insulation sheet 135 is disposed at the rear side of the G-pole conductor. Because circular through-holes 841 and 842 are provided at the positions corresponding to the individual terminals of the switching module in the control circuit insulation sheets, each terminal of the main circuit bus bar 11 and the terminal of the switching module, and each terminal of the control circuit bus bar 12 and the terminal of the switching module can be connected by a screw and a driver can be inserted from the front side.

Ends of the through-holes of the conductors can be sealed by the through-holes 841 and 842 and an insulation property can be increased.

As described above, the M-pole conductors 113 to 115 are laminated to be adjacent to the control, circuit bus bar 12 with the insulation material therebetween. When a potential difference between the bus bars adjacent -with the insulation material therebetween exceeds a dielectric breakdown voltage of the insulation material, the insulation breakdown of the insulation material occurs and a large current flows between the bus bars. In addition, even when the potential difference does not exceed the dielectric breakdown voltage, a parasitic capacity exists between the bus bars. For this reason, when the potential difference is large, the current flows through the parasitic capacity, so that a noise occurs in the control circuit. As in this embodiment, the M-pole conductors 113 to 115 and the control circuit bus bar 12 are disposed to be adjacent to each other, so that the occurrence of the insulation breakdown and the noise due to the high field can be suppressed.

One phase in which a mechanism for obtaining the effect is configured using the switching modules 21 and 22 •will be described hereinafter. Here, it is assumed that the low potential side of the power supply is 0 V and the high potential side thereof is 1500 V. When the low potential is output from the phase to the M-pole terminal 921 for the load connection, the switching module 21 of the upper arm is turned off, the switching module 22 of the lower arm is turned on, and the low potential side of the power supply is connected to the M-pole terminal 921 for the load connection. In this case, the emitter control terminal of the switching module 22 of the lower arm becomes the same potential as the emitter side of the switching module 22 and the potential becomes 0 V, Because the emitter side of the switching module 21 of the upper arm becomes the same potential as the low potential side of the power supply, the potential of the emitter control terminal of the switching module 21 also becomes 0 V. Therefore, when the low potential is output, all of the potentials of the emitter control terminal of the switching module 21, the emitter control terminal of the switching module 22, and the M-pole terminal 921 for the load connection become 0 V and the potential difference does not occur. Therefore, the above problem does not occur.

Next, when the high potential is output from the phase to the M-pole terminal 921 for the load connection, the switching module 21 of the upper arm is turned on, the switching module 22 of the lower arm is turned off, and the high potential side of the power supply is connected to the M-pole terminal 921 for the load connection. In this case, the emitter control terminal of the switching module 21 of the upper arm becomes the same potential as the M-pole terminal 921 for the load connection and the potential becomes 1500 V. Meanwhile, the emitter control terminal of the switching module 22 of the lower arm becomes 0 V to be the same potential as the low potential side of the power supply. For this reason, when the high potential is output, the emitter control terminal of the switching module 21 and the potential of the .M-pole terminal 921 for the load connection become 1500 V, the emitter control terminal of the switching module 22 becomes 0 V, and the above problem may occur.

Here, a configuration for resolving the problem of the potential difference even when the high potential is output will be described using Fig. 8. Fig. 8 illustrates an arrangement relation of the M-pole conductors 113, 114, and 115 and the E-pole conductors 127, 128, 129, 130, 131, and 132 disposed to be adjacent to each other with the insulation material therebetween. As illustrated in Fig. 8, the M-pole conductors are disposed at positions to cover the emitter control terminal 741 of the switching module 21 of the upper arm and are laminated with the E-pole conductors 127, 129, and 131 connected to the switching module 21, However, the M-pole conductors are not disposed at a portion corresponding to the emitter control terminal 741 of the switching module 22 of the lower arm and are not laminated with the E-pole conductors 128, 130, and 132 connected to the switching module 21.

As such, the M-pole conductors are disposed at the positions where the M-pole conductors are laminated with the E-pole conductors 127, 129, and 131 becoming the same potential when the high potential is output and when the low potential is output and are not laminated with the E-pole conductors 128, 130, and 132 causing the potential difference when the high potential is output, so that insulation distances are secured. By this configuration, even when the main circuit bus bar 11 and the control circuit bus bar 12 are laminated and is configured as an integrated member, the problem in which the noise or the insulation breakdown occurs in the control circuit bus bar due to the influence from the main circuit bus bar can be resolved.

When the high potential is output, the high potential difference occurs between the E-pole conductors 127, 129, and 131 and the E-pole conductors 128, 130, and 132. For this reason, it is preferable to set sufficient insulation distances or provide an insulation material between the conduc tors .

In addition, in this embodiment, the M-pole conductors and the E-pole conductors 127, 129, and 131 are laminated to be adjacent to each other with the insulation material therebetween, so that the problem in which the noise or the insulation breakdown occurs in the control circuit bus bar can be resolved. However, the potential difference of the gate control terminal and the emitter control terminal is very smaller than the main circuit power supply voltage as about 10 to 20 V. For this reason, even when the position relation of the E-pole conductors and the G-pole conductors illustrated in Fig. 6 is changed and a structure in which the M-pole conductors and the G- pole conductors 121, 123, and 125 are laminated to be adjacent to each other with the insulation material therebetween and the M-pole conductors are disposed at the position not laminated with the G-pole conductors 122, 124, and 126 is used, almost the same effect can be obtained. That is, this is because the potential difference of the M-pole conductors and the G-pole conductors 121, 123, and 125 is small as about 10 to 20 V when the high potential is output and when the low potential is output and the potential difference of the M-pole conductors and the G-pole conductors 122, 124, and 126 is large as about 1480 to 1490 V,

As described above, if the configuration of the integrated bus bar exemplified in this embodiment is applied, a power conversion device in which an insulation property, assemblability, and noise resistance are secured when the main circuit bus bar and the control circuit bus bar are bonded and are integrated into a single component can be provided.

In this embodiment, the switching module including the two switching elements connected in parallel and including the two collector/emitter terminals is used as the switching element. However, the present invention can be applied to a switching module including a single switching element or a switching module including three switching elements connected in parallel.

Second embodiment

In a second embodiment, the individual switching modules 21 to 26 in the power conversion device according to the first embodiment are rotated by 90° in a left rotation direction or a right rotation direction, when viewed from the front side. In Fig. 9, the switching modules 21 to 26 are rotated by 90° in the right rotation direction. According to this, a G-pole terminal 932 for the control circuit connection and an E-pole terminal 942 for the control circuit connection in a control circuit bus bar 12 are disposed at a transverse side (any one of left and right sides) of an integrated bus bar 1 and terminals 901, 911, and 921 with a power supply in a main circuit bus bar 11 are disposed at an upper side (or a lower side) of the integrated bus bar 1. In addition, through-holes provided in conductors and insulation sheets of the main circuit bus bar and conductor and insulation sheets of the control circuit bus bar are provided at positions corresponding to individual terminals of the switching modules 21 to 26. The other configuration is the same as the configuration of the first embodiment. If this configuration is used, a main circuit current flows mainly in a vertical direction between the individual terminals 901, 911, and 921 provided in an upper portion of the main circuit bus bar 11 and collector terminals or emitter terminals of the switching modules and a control current flows mainly in a horizontal direction between the individual terminals 932 and 942 provided at a transverse side of the control circuit bus bar 12 and individual control terminals 731 and 741 of the switching modules.

For this reason, current paths of the main circuit bus bar 11 and the control circuit bus bar 12 can be configured to be orthogonal to each other. For this reason, a noise occurring in the control circuit bus bar due to a magnetic field around the main circuit bus bar can be reduced.

Even in this embodiment, similarly to the first embodiment, M-pole conductors are disposed at positions overlapping E-pole conductors connected to a switching module configuring an upper arm element and are not disposed at positions overlapping E-pole conductors connected to a switching module configuring a lower arm element. As a result, a problem in which the noise or insulation breakdown occurs in the control circuit bus bar due to an influence from the main circuit bus bar can be resolved.

If a configu ration of the integrated bus bar described in this embodiment is applied, a power conversion device in which an insulation property, assemblability, and noise resistance are secured, and particularly, the noise resistance is improved when the main circuit bus bar and the control circuit bus bar are integrated into a single component can be provided.

Claims

1. A power conversion device comprising: a plurality of switching modules which configure upper and lower arm elements corresponding to three phases; a smoothing capacitor which is connected between a direct- current power supply and the switching modules; a control circuit board which outputs an electric signal to control ON/OFF of the switching modules; a plate-like P~pole conductor which electrically connects a high potential side of the smoothing capacitor and positive electrode terminals of the upper arm elements of the plurality of switching modules; a plate-like N-pole conductor which electrically connects a lower potential side of the smoothing capacitor and negative electrode terminals of the lower arm elements of the plurality of switching modules; plate-like M~pole conductors which are electrically connected to the negative electrode terminals of the upper arm elements and the positive electrode terminals of the lower arm elements and output an alternating-current voltage to a load; plate-like G-pole conductors which electrically connect gate control terminals of the plurality of switching modules and the control circuit board; and plate-like E-pole conductors which electrically connect negative electrode control terminals of the plurality of switching modules and the control circuit board, where!n the P-pole conductor, the N-pole conductor, the M-pole conductors, the G-pole conductors, and the E-pole conductors are laminated with insulation materials therebetween, are bonded to each other, and are fixed as an integrated conductor member to the switching modules and the smoothing capacitor.

2. The power conversion device according to claim 1, wherein: the M-pole conductors end the Ξ-pole conductors are laminated to be adjacent to each other with the insulation materials therebetween.

3. The power conversion device according to claim 2, wherein: the M-pole conductors are disposed at positions overlapping the E-pole conductors connected to the switching modules configuring the upper arm elements and are not disposed at positions overlapping the Ξ-pole conductors connected to the switching modules configuring the lower" arm elements.

4. The power conversion, device according to claim 1, wherein: the M-pole conductors and the G-pole conductors are laminated to be adjacent to each other with the insulation materials therebetween.

5. The power conversion device according to claim 4, wherein: the M-pole conductors are disposed at positions overlapping the G-pole conductors connected to the switching modules configuring the upper arm elements and are not disposed at positions overlapping the G-pole conductors connected to the switching modules configuring the lower arm elements.

6. The power conversion device according to any one of claim 1 to 5, wherein: a main circuit, bus bar configured by laminating the P-pole conductor, the N-pole conductor, and the M-pole conductors with insulation materials therebetween and a control circuit bus bar configured by laminating the G-pole conductors and the E-pole conductors with insulation materials therebetween are laminated with an insulation material therebetween and are bonded to each other.

7. The power conversion device according to any one of claim 1 to 6, wherein: the insulation materials to bond the P-pole conductor, the N-pole conductor, the M-pole conductors, the G-pole conductors, and the E-pole conductors are adhesive materials or double-sided tapes.

8, The power conversion device according to claim 6, wherein; the control circuit bus bar is disposed between the main circuit bus bar and the switching modules,

9. The power conversion device according to claim 8, wherein: the main circuit bus bar is configured by laminating the M-pole conductors, the N-pole conductor, and the P-pole conductor sequentially from the side of the control circuit bus bar.

10, The power conversion device according to any one of claim 1 to 9, wherein: through-holes are provided at positions corresponding to the gate control terminals and the negative electrode control terminals in the N-pole conductor, the M-pole conductors, and the insulation materials disposed between the N-pole conductor and the M-pole conductors.

11. The power conversion device according to any one of claim 1 to IQ, wherein; through-holes are provided at positions corresponding to the gate control terminals, the negative electrode control terminals, the positive electrode terminals, and the negative electrode terminals in the insulation materials disposed between the G-pole conductors and the E-pole conductors.

12. The power conversion device according to any one of claim 1 to 11, wherein: the plurality of G-pole conductors connected to the gate control terminals of the individual switching modules are disposed on the same plane with insulation distances ox* with insulation materials therebetween.

13. The power conversion device according to any one of claim 1 to 12, wherein: the plurality of M-pole conductors connected to the plurality of switching modules are disposed on the same plane with insulation distances or with insulation materials therebetween.

14. The power conversion device according to any one of claim 1 to 13, ’wherein: connection terminals with a power supply in the P-pole conductor and the N-pole conductor are disposed in an upward or downward direction of the switching modules, connection terminals with, the control circuit board in the control circuit bus bar are disposed in a leftward or rightward direction of the switching modules, and a path of a current flowing through the P-pole conductor and the N-pole conductor and a path of an electric signal passing through the control circuit bus bar are configured to be orthogonal to each other.