CN215528886U - Inverter device - Google Patents
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- CN215528886U CN215528886U CN202121187662.6U CN202121187662U CN215528886U CN 215528886 U CN215528886 U CN 215528886U CN 202121187662 U CN202121187662 U CN 202121187662U CN 215528886 U CN215528886 U CN 215528886U
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- 239000000758 substrate Substances 0.000 claims abstract description 74
- 239000003990 capacitor Substances 0.000 claims abstract description 62
- 238000007599 discharging Methods 0.000 claims abstract description 7
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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Abstract
An inverter device is provided to contribute to reduction of inductance and resistance values of wiring of an inverter. An inverter device according to the present invention includes a capacitor having one end electrically connected to a positive electrode of a power supply and the other end electrically connected to a negative electrode of the power supply, and a resistor provided on the substrate for discharging electric charges accumulated in the capacitor, wherein a wiring that electrically connects the first resistor and the second resistor in parallel with the capacitor and a first input unit and a second input unit are provided on the substrate, and one end of the capacitor is electrically connected to the first input unit extending to the first resistor via the common unit and is electrically connected to the second input unit extending to the second resistor via the common unit.
Description
Technical Field
The present invention relates to an inverter device.
Background
In an inverter device, a capacitor and a substrate are generally provided, and in order to prevent an electric shock accident or the like, a discharge resistor for discharging electric charge accumulated in the capacitor may be provided, and in order to save space in an inverter housing, the discharge resistor may be disposed on the substrate.
For example, in a power conversion device corresponding to an inverter device disclosed in patent document 1, a discharge resistor for discharging electric charges stored in a capacitor is mounted on a control circuit board.
Patent document 1: japanese patent No. 6354433
However, in the inverter device, if the length of the wiring for connecting the capacitor and the discharge resistor is increased, the inductance value and the resistance value of the entire device are increased, and the inrush current when the switching element is turned off or on is increased, which may cause adverse effects.
SUMMERY OF THE UTILITY MODEL
The present invention has been made in view of the above problems, and an object thereof is to provide an inverter device that contributes to reduction in inductance and resistance of the wiring of the inverter.
In order to achieve the above object, the present invention provides an inverter device including a capacitor having one end electrically connected to a positive electrode of a power supply and the other end electrically connected to a negative electrode of the power supply, and a resistor provided on the substrate for discharging electric charges accumulated in the capacitor, wherein a wiring electrically connecting the first resistor and the second resistor in parallel with the capacitor and a first resistor and a second resistor as the resistors are provided on the substrate, the wiring includes a common portion, a first input portion, and a second input portion, one end of the capacitor is electrically connected to the first input portion extending to the first resistor via the common portion and is electrically connected to the second input portion extending to the second resistor via the common portion.
According to the inverter device of the present invention, since the wiring and the first resistor and the second resistor as the resistors are provided on the substrate, it is possible to contribute to saving the space inside the inverter housing, as compared with a case where the first resistor and the second resistor are provided outside the substrate and the first resistor and the second resistor are connected to the substrate by the wiring; further, since the wiring includes the common portion, the first input portion, and the second input portion, and one end of the capacitor is electrically connected to the first input portion extending to the first resistor via the common portion, and is electrically connected to the second input portion extending to the second resistor via the common portion, the total length of the wiring can be shortened as compared with a case where a connection portion connecting the first input portion and the capacitor and a connection portion connecting the second input portion and the capacitor are separately provided, which contributes to reduction in inductance value and resistance value of the wiring; further, since the wiring electrically connects the first resistor and the second resistor in parallel with the capacitor, even if one of the first resistor and the second resistor is broken, the charge accumulated in the capacitor can be discharged through the other of the first resistor and the second resistor, thereby improving safety.
In the inverter device according to the present invention, it is preferable that the substrate includes a first region and a second region, the first region and the second region are aligned in an in-plane direction of the substrate, the first resistor is provided in the first region, the second resistor is provided in the second region, the second region is located farther from an electrical connection portion between the substrate and the capacitor than the first region, and the second input portion is located between the first region and the second region.
According to the inverter device of the present invention, since the first region and the second region are present on the substrate, the first region and the second region are arranged in the in-plane direction of the substrate, the first resistor is provided in the first region, the second resistor is provided in the second region, the second region is farther from the electrical connection portion between the substrate and the capacitor than the first region, and the second input portion is located between the first region and the second region, the total length of the wiring can be shortened as compared with a case where the second input portion is provided at another position, and the inductance value and the resistance value of the wiring can be reduced.
In the inverter device according to the present invention, it is preferable that an insulating portion that separates the first resistor from the second resistor is provided between the first region and the second region, and the second input portion is located on a side opposite to the first region with respect to the insulating portion.
In the inverter device according to the present invention, it is preferable that the substrate and the capacitor are electrically connected by a screw.
According to the inverter device of the present invention, since the substrate and the capacitor are electrically connected by the screw, the connection work can be simplified and the wiring length between the substrate and the capacitor can be shortened as compared with the case where the substrate and the capacitor are electrically connected by the wiring.
Further, in the inverter device according to the present invention, it is preferable that the common portion extends from an electrical connection portion between the substrate and the capacitor to the first input portion along a peripheral edge of the first region, and the first input portion extends to the second input portion along a peripheral edge of the first region.
According to the inverter device of the present invention, the common portion extends from the electrical connection portion between the substrate and the capacitor to the first input portion along the peripheral edge of the first region, and the first input portion extends to the second input portion along the peripheral edge of the first region, so that the first region and the wiring are arranged close to each other even in a narrow region in the substrate.
In the inverter device according to the present invention, it is preferable that the first resistor is a chip resistor, and the second resistor is a chip resistor.
According to the inverter device of the present invention, since the first resistor is formed by a chip resistor and the second resistor is formed by a chip resistor, it contributes to space saving in the inverter housing more than a case where a large resistor such as a cement resistor is provided outside the substrate.
In the inverter device according to the present invention, it is preferable that a switching element is provided on the substrate, and the switching element is connected in series to the second resistor.
According to the inverter device of the present invention, since the switching element is provided on the substrate and the switching element is connected in series to the second resistor, the discharging action of the second resistor by the switching element can be controlled.
In the inverter device according to the present invention, it is preferable that the resistance value of the second resistor is smaller than the resistance value of the first resistor.
According to the inverter device of the present invention, since the resistance value of the second resistor is smaller than the resistance value of the first resistor, rapid discharge of the capacitor can be realized by the second resistor.
In the inverter device according to the present invention, it is preferable that the substrate has a plurality of layers, and a through hole is provided in the vicinity of the first resistor and/or the vicinity of the second resistor, the through hole electrically connecting the circuits of the respective layers of the substrate.
According to the inverter device of the present invention, the substrate is provided with the through hole in the vicinity of the first resistor and/or in the vicinity of the second resistor, and the substrate is formed of a plurality of layers, and the through hole can conduct the circuits of the respective layers of the substrate to each other, and can improve the heat dissipation performance.
In the inverter device according to the present invention, it is preferable that the common portion, the first input portion, and the second input portion are each formed of a circuit pattern.
(effects of utility model)
According to the present invention, since the wiring and the first resistor and the second resistor as the resistors are provided on the substrate, it is possible to contribute to saving the space inside the inverter housing, as compared with a case where the first resistor and the second resistor are provided outside the substrate and the first resistor and the second resistor are connected to the substrate by the wiring; further, since the wiring includes the common portion, the first input portion, and the second input portion, and one end of the capacitor is electrically connected to the first input portion extending to the first resistor via the common portion, and is electrically connected to the second input portion extending to the second resistor via the common portion, the total length of the wiring can be shortened as compared with a case where a connection portion connecting the first input portion and the capacitor and a connection portion connecting the second input portion and the capacitor are separately provided, which contributes to reduction in inductance value and resistance value of the wiring; further, since the wiring electrically connects the first resistor and the second resistor in parallel with the capacitor, even if one of the first resistor and the second resistor is broken, the charge accumulated in the capacitor can be discharged through the other of the first resistor and the second resistor, thereby improving safety.
Drawings
Fig. 1 is a circuit diagram schematically showing an inverter device and a motor controlled by the inverter device according to an embodiment of the present invention.
Fig. 2 is a partial side sectional view schematically showing an inverter device according to an embodiment of the present invention.
Fig. 3 is a partial plan view schematically showing a substrate in the inverter device according to the embodiment of the present invention.
(symbol description)
1 inverter device
11 discharge circuit
111 capacitor
112 resistance
1121 first resistance
1122 second resistance
113 switching element
1151 insulating part
1152 insulating part
117 wiring
1171 common part
1172 first input section
1173 second input part
118 screw
119 base plate
119A first region
119B second region
1191 first edge
1192 second side
1193 third strip
12 power module
12A upper bridge arm
12B lower bridge arm
121 switching element
L1 first electric wire
L2 second electric wire
BT power supply
RL1 first relay
RL2 second relay
CN Electrical connection part
2 Motor
Detailed Description
Next, an inverter device according to an embodiment of the present invention will be described with reference to fig. 1 to 3, where fig. 1 is a circuit diagram schematically showing the inverter device according to the embodiment of the present invention and a motor controlled by the inverter device, fig. 2 is a partial side sectional view schematically showing the inverter device according to the embodiment of the present invention, and fig. 3 is a partial plan view schematically showing a substrate in the inverter device according to the embodiment of the present invention.
Here, for convenience of explanation, three directions orthogonal to each other are set as an X direction, a Y direction, and a Z direction, and one side in the X direction is set as X1, the other side in the X direction is set as X2, one side in the Y direction is set as Y1, the other side in the Y direction is set as Y2, one side in the Z direction is set as Z1, and the other side in the Z direction is set as Z2.
(Circuit configuration of inverter device)
As shown in fig. 1, the inverter device 1 includes a discharge circuit 11, wherein the discharge circuit 11 includes a capacitor 111 and a resistor 112 for discharging electric charge accumulated in the capacitor 111.
Here, as shown in fig. 1, a power supply BT is provided outside the inverter device 1. The positive electrode of the power source BT is electrically connected to the first electric wire L1, and the negative electrode of the power source BT is electrically connected to the second electric wire L2. As shown in fig. 1, a first relay RL1 and a second relay RL2 that are on/off controlled by, for example, a vehicle control device (not shown) are provided outside the inverter device 1, the first relay RL1 is provided on the first electric wire L1, the second relay RL2 is provided on the second electric wire L2, and the first relay RL1 and the second relay RL2 are located between the power source BT and the discharge circuit 11, respectively.
Further, as shown in fig. 1, the capacitor 111 has one end (upper end in fig. 1) electrically connected to the positive electrode of the power source BT and the other end (lower end in fig. 1) electrically connected to the negative electrode of the power source BT. Specifically, one end of the capacitor 111 is electrically connected to the first electric wire L1, and the other end of the capacitor 111 is electrically connected to the second electric wire L2.
As shown in fig. 1, the resistor 112 includes a first resistor 1121 and a second resistor 1122, the first resistor 1121 and the second resistor 1122 each have one end (upper end in fig. 1) electrically connected to the positive electrode of the power source BT and the other end (lower end in fig. 1) electrically connected to the negative electrode of the power source BT, and high voltages are applied to the first resistor 1121 and the second resistor 1122, respectively. Specifically, one end of the first resistor 1121 is electrically connected to the first wire L1, and the other end of the first resistor 1121 is electrically connected to the second wire L2; one end of the second resistor 1122 is electrically connected to the first electric wire L1, and the other end of the second resistor 1122 is electrically connected to the second electric wire L2; the first resistor 1121 is further away from the power supply BT than the second resistor 1122, and the capacitor 111 is further away from the power supply BT than the first resistor 1121. The resistance value of the second resistor 1122 is smaller than the resistance value of the first resistor 1121.
As shown in fig. 1, the inverter device 1 further includes a switching element 113, and the switching element 113 is connected in series to the second resistor 1122. Specifically, one end of the switching element 113 is electrically connected to the second resistor 1122, and the other end of the switching element 113 is electrically connected to the second wire L2.
As shown in fig. 1, the inverter device 1 further includes a power module 12, and the power module 12 includes a plurality of switching elements 121. Specifically, power module 12 includes an upper arm 12A and a lower arm 12B, and upper arm 12A and lower arm 12B each include a plurality of switching elements 121. The switching element 121 is, for example, an IGBT switching element or a MOSFET switching element.
Further, as shown in fig. 1, the inverter device 1 supplies electric power to the motor 2. Specifically, the motor 2 has three phases, and the power module 12 converts electric power from the power source BT and supplies the converted electric power to the three-phase coil of the motor 2.
(mechanical Structure of inverter device)
As described above, the inverter device 1 includes the capacitor 111.
Here, as shown in fig. 2, the inverter device 1 further includes a substrate 119. The substrate 119 is laminated on the capacitor 111 (in the illustrated example, the substrate 119 is provided on the Z1 direction side of the capacitor 111 so that the thickness direction coincides with the Z direction). The substrate 119 and the capacitor 111 are electrically connected by a screw 118.
As shown in fig. 2 and 3, the substrate 119 is provided with the first resistor 1121 and the second resistor 1122, and the switching element 113 (in the illustrated example, the first resistor 1121, the second resistor 1122, and the switching element 113 are provided on the surface of the substrate 119 on the Z1 direction side). The first resistor 1121 is formed of a chip resistor (e.g., one or more chip resistors), and the second resistor 1122 is also formed of a chip resistor (e.g., one or more chip resistors). The switching element 113 is, for example, an IGBT (insulated gate bipolar transistor) switching element or a MOSFET (metal-oxide semiconductor field effect transistor) switching element.
As shown in fig. 3, a wiring 117 that electrically connects the first resistor 1121 and the second resistor 1122 in parallel to the capacitor 111 is provided on the substrate 119 (in the illustrated example, the wiring 117 is provided on the surface of the substrate 119 on the Z1 direction side). The wiring 117 includes a common portion 1171, a first input portion 1172, and a second input portion 1173, and one end of the capacitor 111 is electrically connected to the first input portion 1172 extending to the first resistor 1121 through the common portion 1171, and is electrically connected to the second input portion 1173 extending to the second resistor 1122 through the common portion 1171. The common portion 1171, the first input portion 1172, and the second input portion 1173 are each formed of a circuit pattern.
As shown in fig. 3, the substrate 119 includes a first region 119A and a second region 119B, the first region 119A and the second region 119B are aligned in the in-plane direction of the substrate 119, that is, in a direction perpendicular to the thickness direction of the substrate 119 (in the illustrated example, the first region 119A and the second region 119B are aligned in the X direction), the first resistor 1121 is provided in the first region 119A, the second resistor 1122 is provided in the second region 119B, the second region 119B is located farther from the electrical connection CN between the substrate 119 and the capacitor 111 than the first region 119A (in the illustrated example, the second region 119B is located on the X1 direction side of the first region 119A), and the second input portion 1173 is located between the first region 119A and the second region 119B.
Further, as shown in fig. 3, the common portion 1171 extends from the electrical connection portion CN between the substrate 119 and the capacitor 111 to the first input portion 1172 along the peripheral edge of the first region 119A, and the first input portion 1172 extends from the common portion 1171 to the second input portion 1173 along the peripheral edge of the first region 119A. Specifically, the first region 119A is rectangular as a whole, the common portion 1171 extends along a first side 1191 (parallel to the Y direction in the illustrated example) of the first region 119A, the first input portion 1172 extends along a second side 1192 (parallel to the X direction in the illustrated example) of the first region 119A perpendicular to the first side 1191, and the second input portion 1173 extends along a third side 1193 (parallel to the Y direction in the illustrated example) of the first region 119A perpendicular to the second side 1192, and is adjacent to the first input portion 1172 (in the illustrated example, an end portion on the Y1 direction side of the second input portion 1173 is connected to an end portion on the X1 direction side of the first input portion 1172). The second region 119B is also rectangular as a whole, and the longitudinal direction thereof coincides with the longitudinal direction of the first region 119A.
As shown in fig. 3, an insulating portion 1151 (in the illustrated example, the insulating portion 1151 extends in the Y direction) for separating the first resistor 1121 from the second resistor 1122 is provided between the first region 119A and the second region 119B, and the second input portion 1173 is located on the opposite side of the insulating portion 1151 from the first region 119A. An insulating portion 1152 is also provided in the first region 119A and the common portion 1171 (in the example shown, the insulating portion 1152 extends in the Y direction), and the insulating portion 1152 separates the first resistor 1121 from the common portion 1171.
Although not shown, the inverter device 1 includes an inverter housing that houses the capacitor 111 and the substrate 119.
(main effect of the present embodiment)
According to the inverter device 1 of the present embodiment, since the wiring 117 and the first resistor 1121 and the second resistor 1122 as the resistors 112 are provided on the substrate 119, it is possible to contribute to saving the space in the inverter housing, as compared with a case where the first resistor 1121 and the second resistor 1122 are provided outside the substrate 119 and the first resistor 1121 and the second resistor 1122 are connected to the substrate by wiring; further, since the wiring 117 includes the common portion 1171, the first input portion 1172, and the second input portion 1173, and one end of the capacitor 111 is electrically connected to the first input portion 1172 extending to the first resistor 1121 via the common portion 1171, and is electrically connected to the second input portion 1173 extending to the second resistor 1122 via the common portion 1171, the total length of the wiring 117 can be shortened, which contributes to reduction in the inductance value and the resistance value of the wiring 117, as compared with a case where a connection portion connecting the first input portion 1172 and the capacitor 111, and a connection portion connecting the second input portion 1173 and the capacitor 111 are separately provided; further, since the wiring 117 electrically connects the first resistor 1121 and the second resistor 1122 in parallel to the capacitor 117, even if one of the first resistor 1121 and the second resistor 1122 is broken, as shown by a real circulation line and a dotted circulation line in fig. 1, the electric charge accumulated in the capacitor 111 is discharged through the other of the first resistor 1121 and the second resistor 1122, thereby improving safety.
Further, according to the inverter device 1 of the present embodiment, since the first region 119A and the second region 119B are present on the substrate 119, the first region 119A and the second region 119B are arranged in the in-plane direction of the substrate 119, the first resistor 1121 is provided in the first region 119A, the second resistor 1122 is provided in the second region 119B, the second region 119B is located farther from the electrical connection CN between the substrate 119 and the capacitor 111 than the first region 119A, and the second input portion 1173 is located between the first region 119A and the second region 119B, the total length of the wiring 117 can be shortened as compared with a case where the second input portion 1173 is provided at another position, and the inductance value and the resistance value of the wiring 117 can be reduced.
The present invention is described above by way of example with reference to the accompanying drawings, and it is to be understood that the specific implementations of the present invention are not limited to the above-described embodiments.
For example, in the above-described embodiment, the inverter device 1 is used to supply power to the motor 2, but the present invention is not limited to this, and the inverter device 1 may be applied to other applications.
In the above embodiment, the first resistor 1121 may be formed of a resistor other than a chip resistor, and the second resistor 1122 may be formed of a resistor other than a chip resistor.
In the above embodiment, the first resistor 1121 may be formed of a plurality of resistors arranged in a row and column, and the second resistor 1122 may be formed of a plurality of resistors arranged in a row and column.
In the above embodiment, the resistance value of the second resistor 1122 is smaller than that of the first resistor 1121, but the present invention is not limited thereto, and the resistance value of the second resistor 1122 may be equal to or larger than that of the first resistor 1121.
In the above embodiment, the first resistor 1121, the second resistor 1122, the switching element 113, and the wiring 117 are provided on the surface of the substrate 119 on the Z1 direction side, but the present invention is not limited to this, and may be provided on the surface of the substrate 119 on the Z2 direction side, or may be embedded in the substrate 119.
In the above embodiment, the substrate 119 and the capacitor 111 are electrically connected by the screw 118, but the present invention is not limited to this, and the substrate 119 and the capacitor 111 may be electrically connected by a wire.
In the above embodiment, the inverter device 1 further includes one switching element 113, and the switching element 113 is connected in series with the second resistor 1122, but the present invention is not limited to this, and a plurality of switching elements 113 may be provided in series, and in some cases, the switching element 113 may be omitted.
In the above embodiment, a through hole may be provided in the vicinity of the first resistor 1121 and/or the vicinity of the second resistor 1122 on the substrate 119, the substrate 119 may be formed in a plurality of layers, and the circuits of the respective layers of the substrate 119 may be electrically connected to each other through the through hole.
In the above embodiment, the first region 119A and the second region 119B are not limited to the shapes shown in the drawings.
In the above embodiment, the first relay RL1 is provided in the first electric wire L1, and the second relay RL2 is provided in the second electric wire L2, but the present invention is not limited to this, and the first relay RL1 and/or the second relay RL2 may be omitted in some cases.
It should be understood that the present invention can freely combine the respective components in the embodiments, or appropriately change or omit the respective components in the embodiments within the scope thereof.
Claims (10)
1. An inverter device comprising a capacitor having one end electrically connected to a positive electrode of a power supply and the other end electrically connected to a negative electrode of the power supply, and a substrate on which a resistor for discharging electric charge accumulated in the capacitor is provided,
wiring and a first resistor and a second resistor as the resistors are provided on the substrate,
the wiring electrically connects the first resistance and the second resistance in parallel with the capacitor,
the wiring includes a common portion, a first input portion and a second input portion,
one end of the capacitor is electrically connected to the first input portion extending to the first resistor via the common portion, and is electrically connected to the second input portion extending to the second resistor via the common portion.
2. The inverter device according to claim 1,
there is a first region and a second region on the substrate,
the first region and the second region are arranged in an in-plane direction of the substrate,
the first resistor is disposed in the first region,
the second resistor is disposed in the second region,
the second region is farther from an electrical connection between the substrate and the capacitor than the first region,
the second input portion is located between the first region and the second region.
3. The inverter device according to claim 2,
an insulating portion that separates the first resistor from the second resistor is provided between the first region and the second region,
the second input portion is located on a side opposite to the first region with respect to the insulating portion.
4. The inverter device according to claim 2,
the substrate and the capacitor are electrically connected by screws.
5. The inverter device according to claim 2,
the common portion extends from an electrical connection portion between the substrate and the capacitor to the first input portion along a peripheral edge of the first area,
the first input portion extends to the second input portion along a periphery of the first area.
6. The inverter device according to claim 1,
the first resistor is formed by a chip resistor,
the second resistor is composed of a chip resistor.
7. The inverter device according to claim 1,
a switching element is provided on the substrate,
the switching element is connected in series with the second resistor.
8. The inverter device according to claim 1,
the resistance value of the second resistor is smaller than that of the first resistor.
9. The inverter device according to claim 1,
a through hole is provided in the substrate in the vicinity of the first resistor and/or in the vicinity of the second resistor,
the substrate is composed of a plurality of layers,
the vias conduct the circuits of the layers of the substrate to each other.
10. The inverter device according to claim 1,
the common portion, the first input portion, and the second input portion are each constituted by a circuit pattern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121187662.6U CN215528886U (en) | 2021-05-31 | 2021-05-31 | Inverter device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121187662.6U CN215528886U (en) | 2021-05-31 | 2021-05-31 | Inverter device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215528886U true CN215528886U (en) | 2022-01-14 |
Family
ID=79805828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121187662.6U Active CN215528886U (en) | 2021-05-31 | 2021-05-31 | Inverter device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215528886U (en) |
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2021
- 2021-05-31 CN CN202121187662.6U patent/CN215528886U/en active Active
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