JP6434955B2 - Vehicle and electric wire structure - Google Patents

Description

  The present invention relates to a vehicle and an electric wire structure that can be suitably used for reducing electromagnetic noise (particularly high frequency noise) generated by a switching element.

  Patent Document 1 aims to provide a conductive path that can reduce electromagnetic noise while ensuring the connectivity of a braided shield ([0007], summary). In order to achieve the object, the conductive path 1 of Patent Document 1 (summary, FIG. 1) includes first to third electric wires 11 to 13, an electric wire holding member 5 (FIG. 3A), and a pipe 3. The flexible braided shield 10 and the electromagnetic wave absorbing component 2 are provided. The electric wire holding member 5 holds the first to third electric wires 11 to 13. The pipe 3 guides the first to third electric wires 11 to 13 led out from the opening 5 a of the electric wire holding member 5. The braided shield 10 covers the first to third electric wires 11 to 13 between the electric wire holding member 5 and the pipe 3. The electromagnetic wave absorbing component 2 absorbs electromagnetic waves radiated from the first to third electric wires 11 to 13. The electromagnetic wave absorbing component 2 is disposed on the outer peripheral side of the first to third electric wires 11 to 13 between the electric wire holding member 5 and the pipe 3.

  The electromagnetic wave absorbing component 2 can be electrically connected to the shield shell 4 (FIG. 3B) by being crimped by the fastening member 8 ([0026]). The shield shell 4 is fixed to the grounded casing of the inverter 91 by bolts ([0023]).

JP2015008100A

  As described above, in Patent Document 1, the first to third electric wires 11 are interposed between the electric wire holding member 5 and the pipe 3 in order to absorb electromagnetic waves radiated from the first to third electric wires 11 to 13. The electromagnetic wave absorbing component 2 is arranged on the outer peripheral side of ˜13 (summary, FIG. 1). The electromagnetic wave absorbing component 2 (magnetic core) is increased in size because the first to third electric wires 11 to 13 and the braided shield 10 are disposed inside.

  Further, the braided shield 10 of Patent Document 1 is grounded via the fastening member 8, the shield shell 4, and the casing of the inverter 91 ([0023], [0026]). In Patent Document 1, there is room for improvement in terms of the degree of freedom in design or arrangement for grounding the braided shield 10.

  The present invention has been made in consideration of the above-described problems, and provides a vehicle and an electric wire structure having a high degree of design freedom in a configuration or arrangement for grounding a braided shield while reducing the size of a magnetic core. For the purpose.

The vehicle according to the present invention is
A power converter having a switching element;
One or more power components for transferring power;
A wire connecting between the power converter and the power component or between the power components; and
Furthermore, the vehicle
A braided shield having a main body that covers the electric wire and a separation portion that is separated from the electric wire and grounded to a vehicle body;
A hollow magnetic core covering the separation part ,
The vehicle is
A first electric wire;
With the second wire
As the electric wire,
Furthermore, the vehicle is
A first braided shield covering the first electric wire;
A second braided shield covering the second electric wire;
As the braided shield,
Furthermore, the vehicle is
A first separation part separated from the first electric wire;
A second separation portion separated from the second electric wire;
As the separation part,
Wherein the vehicle body ground point of the first separation unit and the second separation unit that is collectively bolted.

According to the present invention, the braided shield is grounded to the vehicle body at the separation portion separated from the electric wire. For this reason, it becomes possible to design the structure or position of a separation part comparatively freely. In addition, the magnetic core covers not the main body that covers the electric wire but the separating portion that is separated from the electric wire. For this reason, it is possible to reduce the size of the magnetic core by reducing the size of the separation portion as much as no electric wire exists. When the resistance of the contact portion between the braided shield (the first separating portion and the second separating portion) and the vehicle body is relatively large, the electromagnetic noise flowing into the braided shield is difficult to flow to the vehicle body side. Thereby, it becomes possible to limit the flow of electromagnetic noise and prevent the formation of an unintended noise route. In addition, since the vehicle body grounding points of the first separation unit and the second separation unit are collectively fixed with bolts, the first separation unit and the second separation unit can be easily grounded.

  A conducting wire may be twisted in at least a part of the separation part. As a result, the thickness (diameter, etc.) of the separation portion can be reduced, and as a result, the magnetic core can be reduced in size. Moreover, since the conducting wire of the separation part is twisted, the strength of the separation part can be improved.

  The vehicle may include a waterproof tube that covers at least a portion of the main body exposed to the outside of the vehicle. The separation unit may be provided in a vehicle interior. Thereby, even if it is relatively difficult to cover the separation portion with the waterproof tube, the separation portion is easily protected from water.

  The vehicle may include a shield pipe that covers at least a part of the main body. Thereby, even when the electric wire is exposed toward the outside of the vehicle, it is easy to protect the electric wire from contact with a stone or the like.

The vehicle may include a high voltage battery, a step-down converter, and a low voltage battery as the power components. Furthermore, the first electric wire is a high-voltage electric wire that electrically connects the power converter and the high-voltage battery , and the second electric wire is a low-voltage electric wire that electrically connects the step-down converter and the low-voltage battery. it may be. Furthermore, the first separation unit, the being separated from the first wire in the high-voltage battery side, the second separation unit, also as being separated from the second wire at the buck converter side Good.

  The magnetic core may be provided in one of the first separation part and the second separation part. Thereby, it becomes possible to enhance the noise reduction effect as compared with the case where the magnetic core is provided so as to straddle the first separation portion and the second separation portion (described later with reference to FIG. 7). Therefore, the number of parts or cost can be reduced.

  At least one of the first separation part or the second separation part may be fixed with a clip to a stay extending from the vehicle body frame supporting the high-voltage battery toward the power converter. Thereby, rocking of the 1st separation part or the 2nd separation part can be controlled. In addition, it is possible to prevent movement of the magnetic core covering the first separation part or the second separation part.

  The vehicle may include an inverter for driving a compressor of an air conditioner as the power component. Furthermore, the vehicle may include an air conditioner wire that electrically connects the inverter and the high-voltage battery as the wire. At least a part of the main body portion of the braided shield may cover the high-voltage electric wire and the air conditioner electric wire in a lump. According to the above, it is possible to reduce the number of parts by covering the high-voltage wires and the air conditioner wires together. Further, electromagnetic noise generated by the inverter for the air conditioner can be absorbed by the magnetic core.

An electric wire structure according to the present invention is an electric wire connecting a power conversion device having a switching element and a power source, or between the power conversion device and a first power load, or between the first power load and the second power load. Comprising:
Furthermore, the wire structure is
A braided shield having a main body that covers the electric wire and a separation portion that is separated from the electric wire and grounded;
A hollow magnetic core covering the separation part ,
The wire structure is
A first electric wire;
With the second wire
As the electric wire,
Furthermore, the wire structure is
A first braided shield covering the first electric wire;
A second braided shield covering the second electric wire;
As the braided shield,
Furthermore, the wire structure is
A first separation part separated from the first electric wire;
A second separation portion separated from the second electric wire;
As the separation part,
Wherein the first separation unit and the vehicle body ground point of the second separation unit is characterized by that it will be collectively bolted.

  According to the present invention, it is possible to reduce the size of the magnetic core and increase the degree of design freedom of the configuration or arrangement for grounding the braided shield.

It is a top view which shows the outline | summary of the vehicle which concerns on one Embodiment of this invention. It is a side view which shows arrangement | positioning of the electric wire structure contained in the said vehicle of the said embodiment. It is a schematic block diagram which shows the said electric wire structure of the said embodiment, and its periphery. It is a perspective view which shows a part of body frame of the said embodiment, an electric wire structure, and each battery unit. It is a perspective view which shows a part of the said electric wire structure of the said embodiment. It is sectional drawing which shows a part of said electric wire structure of the said embodiment simply. It is a figure which shows the reduction effect of the electromagnetic noise by the said embodiment, a comparative example, and a 1st, 2nd modification. It is a schematic whole block diagram of the vehicle which concerns on a 1st modification.

A. One Embodiment <A-1. Configuration>
[A-1-1. overall structure]
FIG. 1 is a plan view showing an outline of a vehicle 10 according to an embodiment of the present invention. FIG. 2 is a side view showing the arrangement of the electric wire structure 36 included in the vehicle 10 of the present embodiment. FIG. 3 is a schematic configuration diagram showing the electric wire structure 36 of the present embodiment and its periphery.

  The vehicle 10 includes an engine 18 that generates a traveling driving force and a traveling motor 20 (hereinafter also referred to as “motor 20”). In addition to the engine 18 and the travel motor 20, the vehicle 10 includes a power control unit 22 (hereinafter referred to as “PCU 22”; PCU: Power Control Unit), a high voltage battery 24, a step-down converter 26, a low voltage battery 28, and an air conditioner. 30, a body frame 32, a floor panel 34 (FIG. 2), and an electric wire structure 36. Each of these parts constitutes the power system 12 (FIG. 3). As shown in FIGS. 1 and 3, the engine 18, the motor 20, the PCU 22, the low voltage battery 28, the air conditioner 30, and the like are disposed in the engine room 38.

[A-1-2. Traveling motor 20]
The motor 20 of this embodiment is a three-phase AC brushless type. The motor 20 generates a driving force based on the electric power supplied from the high voltage battery 24 via the electric wire structure 36 and the PCU 22, and rotates wheels (not shown) through a transmission (not shown) by the driving force. . Further, the motor 20 outputs electric power (regenerative power) generated by performing regeneration to the high-voltage battery 24 or the like.

[A-1-3. PCU22]
The PCU 22 controls the power supplied to the traveling motor 20 and the regenerative power of the motor 20. As shown in FIG. 3, the PCU 22 includes a DC / DC converter 50 (hereinafter also referred to as “converter 50”), a traveling motor inverter 52, and a motor electronic control device 54 (hereinafter referred to as “motor ECU 54”). Have.

  Converter 50 (power converter, power component, power load) converts power from high-voltage battery 24. Specifically, converter 50 boosts the output voltage from high-voltage battery 24 (hereinafter referred to as “battery voltage Vpath”). In addition, converter 50 steps down the output voltage (regenerative voltage) from traveling motor 20 and outputs it to high voltage battery 24. Converter 50 includes a plurality of switching elements 60. At least one of the switching elements 60 is for boosting, and at least another is for stepping down. The converter 50 may perform only step-up or step-down.

  The switching element 60 of the present embodiment is composed of, for example, a MOSFET (metal-oxide-semiconductor field-effect transistor). The switching element 60 performs switching at a high frequency based on a drive signal from the motor ECU 54.

  The inverter 52 (power conversion device, power component, power load) converts the power from the high voltage battery 24. The inverter 52 has a three-phase full bridge configuration and performs DC-AC conversion. More specifically, the inverter 52 converts direct current into three-phase alternating current and supplies it to the motor 20, while supplying direct current after alternating current-direct current conversion accompanying the regenerative operation to the high voltage battery 24 and the like through the converter 50. The inverter 52 has a plurality of switching elements 62. The inverter 52 converts the direct current from the high voltage battery 24 into alternating current by turning on the switching elements 62 in order.

  The switching element 62 of this embodiment consists of MOSFET, for example. The switching element 62 performs switching at a high frequency based on a drive signal from the motor ECU 54.

  The motor ECU 54 controls the converter 50 and the inverter 52 according to the required driving force of the traveling motor 20 and the like.

[A-1-4. High voltage battery 24]
The high voltage battery 24 (power source, power component) is a power storage device (energy storage) including a plurality of battery cells. As the high voltage battery 24, for example, a lithium ion secondary battery, a nickel metal hydride secondary battery, or the like can be used. Instead of the high voltage battery 24, a power storage device such as a capacitor may be used. The output voltage (battery voltage Vpath) of the high voltage battery 24 is, for example, several hundred volts. The high voltage battery 24 is configured as a part of the battery unit 64. The battery unit 64 includes a battery voltage monitoring device (not shown) in addition to the high voltage battery 24.

  The high voltage battery 24 (or the battery unit 64) has a battery frame 96 (see FIG. 1). The high voltage battery 24 (or the battery unit 64) is disposed behind a seat (not shown).

[A-1-5. Step-down converter 26]
The step-down converter 26 (power conversion device, power component, power load) steps down the output voltage Vpath of the high-voltage battery 24 and supplies it to the low-voltage battery 28 via the electric wire structure 36. The step-down converter 26 is provided adjacent to the high voltage battery 24. The step-down converter 26 may be configured as a part of the battery unit 64.

[A-1-6. Low voltage battery 28]
The low voltage battery 28 (power source, power component) is a power storage device (energy storage) including a plurality of battery cells. As the low-voltage battery 28, for example, a lead battery or the like can be used. The output voltage (battery voltage Vbatl) of the low-voltage battery 28 is, for example, 12 volts.

[A-1-7. Air conditioner 30]
The air conditioner 30 (power conversion device, power component, power load) includes a compressor motor 70, an air conditioner inverter 72, and an air conditioner electronic control device 74 (hereinafter referred to as “air conditioner ECU 74”). Have

  The compressor motor 70 constitutes a part of an air compressor used in the air conditioner 30.

  The inverter 72 (power converter, power component, power load) converts power from the high voltage battery 24. Like the inverter 52 of the PCU 22, the inverter 72 has a three-phase full-bridge configuration and performs DC-AC conversion. More specifically, the inverter 72 converts direct current into three-phase alternating current and supplies it to the motor 70. The inverter 72 has a plurality of switching elements (not shown). The inverter 72 converts the direct current from the high voltage battery 24 into alternating current by turning on each switching element in turn. The switching element of the inverter 72 performs switching at a high frequency based on a drive signal from the air conditioner ECU 74.

  The air conditioner ECU 74 controls the inverter 72 according to the required output of the air conditioner 30 and the like.

[A-1-8. Body frame 32]
FIG. 4 is a perspective view showing a part of each of the vehicle body frame 32, the electric wire structure 36, and the battery unit 64 of the present embodiment. The body frame 32 is configured by combining a plurality of frames constituting the vehicle 10. As shown in FIG. 1, the vehicle body frame 32 includes a front side frame 90, a side sill 92, a rear frame 94, and a battery frame 96.

  The battery frame 96 is disposed between the two rear frames 94 on the rear side of the vehicle 10 and supports the battery unit 64 and the like. In FIG. 3, the rear frame 94 and the front side frame 90 are simplified and drawn as one place. As shown in FIG. 4, the battery frame 96 of the vehicle body frame 32 includes a stay 98 that extends to the front side of the vehicle 10 (in other words, the PCU 22 side).

  In FIG. 3, reference numeral 100 denotes a PCU 22, the motor 20, an air conditioner inverter 72, a low-voltage battery through metal members such as the body frame 32, the casing of the PCU 22, the casing of the motor 20, and the engine block of the engine 18. 28 is electrically connected, and schematically shows a portion that can be a noise transmission path.

[A-1-9. Floor panel 34 and dashboard 35]
The floor panel 34 (FIGS. 2 and 3) is a panel that forms the floor of the vehicle 10. The dashboard 35 is located in front of the floor panel 34 and separates the vehicle compartment 110 and the engine room 38. That is, the passenger compartment 110 exists above the floor panel 34 and behind the dashboard 35. Therefore, in the vicinity of the floor panel 34 of FIG. 3, the right side of the floor panel 34 indicates the actual upper side, and the left side of the floor panel 34 indicates the actual lower side. It should be noted that the engine room 38 side in FIG. 3 is located in front of the dashboard 35 (see FIG. 2).

[A-1-10. Electric wire structure 36]
(A-1-10-1. Outline of electric wire structure 36)
FIG. 5 is a perspective view showing a part of the wire structure 36 of the present embodiment. FIG. 6 is a cross-sectional view schematically showing a part of the wire structure 36 of the present embodiment. The electric wire structure 36 electrically connects each power component (the PCU 22, the air conditioner 30, etc.) included in the power system 12. As shown in FIGS. 3 to 6, the electric wire structure 36 includes electric wires 120p, 120n, 122, 124p, and 124n, braided shields 130 and 132, a magnetic core 140, a waterproof tube 150, and a shield pipe 160. Clip 170. Note that in FIG. 3, a part of the electric wire structure 36 (200p, 200n, which will be described later) is omitted.

(A-1-10-2. Electric wires 120p, 120n, 122, 124p, 124n)
As shown in FIG. 6, each electric wire 120p, 120n, 122, 124p, 124n includes a core wire 172a, 172b, 172c and a resin cover 174a, 174b, 174c. Electric wires 120p and 120n (hereinafter also referred to as “high voltage electric wires 120p and 120n”) electrically connect the PCU 22 and the high voltage battery 24 (FIG. 3). The electric wire 122 (hereinafter also referred to as “low voltage electric wire 122”) electrically connects the step-down converter 26 and the low voltage battery 28 (FIG. 3). Electric wires 124p and 124n (hereinafter also referred to as “air conditioner wires 124p and 124n”) electrically connect the inverter 72 for the air conditioner and the high voltage battery 24.

  As shown in FIG. 5, terminals 200p and 200n are provided at the ends of the high-voltage electric wires 120p and 120n. The terminals 200p and 200n are fixed to the battery unit 64 with bolts 202. As shown in FIGS. 4 and 5, a terminal 204 is provided at the tip of the low voltage electric wire 122. The terminal 204 is fixed to the battery unit 64 with a bolt 206. As shown in FIGS. 4 and 5, a connector 208 is provided at the tip of the air conditioner wires 124p and 124n. Connector 208 is fixed to a connector (not shown) of battery unit 64.

  As shown in FIG. 3, the electric wires 120 p, 120 n, 122, 124 p, 124 n connect the engine room 38 and the battery unit 64. In other words, each electric wire 120p, 120n, 122, 124p, 124n connects the front side of the sheet (not shown) and the rear side of the sheet. As shown in FIG. 2, the electric wires 120p, 120n, 122, 124p, and 124n covered with the waterproof tube 150 or the shield pipe 160 are arranged facing the road surface.

(A-1-10-3. Braided shields 130 and 132)
(A-1-10-3-1. Outline of braided shields 130 and 132)
Electromagnetic noise generated mainly by the PCU 22 is applied to the electric wires 120p, 120n, 122, 124p, and 124n. The braided shields 130 and 132 prevent the electromagnetic noise on the electric wires from propagating to the outside (such as in the passenger compartment 110).

  The braided shield 130 (hereinafter also referred to as “first braided shield 130”) covers the high-voltage wires 120p and 120n and the air conditioner wires 124p and 124n. The braided shield 132 (hereinafter also referred to as “second braided shield 132”) covers the low-voltage electric wire 122.

  The first braided shield 130 includes a main body portion 180a that covers the electric wires 120p, 120n, 124p, and 124n, and a separation portion 182a that is separated from the electric wires 120p, 120n, 124p, and 124n and is grounded to the vehicle body frame 32. The second braided shield 132 includes a main body portion 180 b that covers the electric wire 122, and separation portions 182 b and 182 c that are separated from the electric wire 122 and grounded to the vehicle body frame 32.

(A-1-10-3-2. Main body portions 180a and 180b)
The main body portion 180 a of the first braided shield 130 includes a high-pressure braid portion 190, an air-conditioner braid portion 192, and a common braid portion 194. The high voltage braided portion 190 covers only the high voltage electric wires 120p and 120n. The air conditioner braided portion 192 covers only the air conditioner wires 124p and 124n. The common braided portion 194 is common to the high-voltage wires 120p and 120n and the air conditioner wires 124p and 124n. In other words, the common braided portion 194 covers the high-voltage wires 120p and 120n and the air conditioner wires 124p and 124n in a lump.

  The main body portion 180 b of the second braided shield 132 covers the low voltage electric wire 122.

(A-1-10-3-3. Separation part 182a, 182b, 182c)
The separation part 182a (hereinafter also referred to as “first separation part 182a”) of the first braided shield 130 is separated from the high-voltage wires 120p and 120n and the air conditioner wires 124p and 124n on the high-voltage battery 24 side. Separation part 182b (hereinafter also referred to as “second separation part 182b”) of second braided shield 132 is separated from low-voltage electric wire 122 on the step-down converter 26 side. Separation part 182c (hereinafter also referred to as “third separation part 182c”) of second braided shield 132 is separated from low-voltage electric wire 122 on the low-voltage battery 28 side.

  The separating portions 182a and 182b are crimped by the crimping portion 220 (FIGS. 4 and 5) in a state where the conducting wires constituting the separating portions 182a and 182b are twisted (or a state in which the conducting wires are tightly gathered together) and are connected to the terminal 222. Connected to. Similarly, the separating portion 182c is crimped by a crimping portion (not shown) and connected to a terminal (not shown). For this reason, the separation parts 182a, 182b, and 182c are thinner than the main body parts 180a and 180b.

  Terminals 222 (FIGS. 4 and 5) connected to the separating portions 182 a and 182 b are fixed to the vehicle body frame 32 by bolts 224. More specifically, the first and second separation portions 182 a and 182 b are fixed to the battery frame 96 by bolts 224. As described above, the battery frame 96 supports the high voltage battery 24. The vehicle body grounding points of the first separation part 182a and the second separation part 182b are fixed together by bolts 224. The first and second separation portions 182a and 182b are disposed closer to the passenger compartment 110 than the floor panel 34. In other words, the first and second separation portions 182a and 182b are disposed in the passenger compartment 110.

  The third separation portion 182c (or a terminal (not shown) connected to the third separation portion 182c) is fixed to the front side frame 90 with a bolt 226 (FIG. 3). The third separation unit 182c is disposed in the engine room 38.

(A-1-10-4. Magnetic core 140)
Magnetic core 140 (hereinafter also referred to as “core 140”) reduces electromagnetic noise generated in power system 12 (particularly PCU 22). 3 indicates that electromagnetic noise generated in the PCU 22 (converter 50 and / or inverter 52) is absorbed by the magnetic core 140 via the main body portion 180a, the first separation portion 182a, and the second separation portion 182b. It shows a state.

  As shown in FIG. 5 and the like, the core 140 has a hollow shape. The core 140 of the present embodiment is provided in the second separation unit 182b. The core 140 may be provided in other portions (for example, the first separation unit 182a). The effect of reducing electromagnetic noise by the core 140 will be described later with reference to FIG.

(A-1-10-5. Waterproof tube 150)
The waterproof tube 150 is made of a waterproof material (for example, waterproof resin). The waterproof tube 150 covers the electric wires 120p, 120n, 122, 124p, and 124n and the braided shields 130 and 132 (particularly the main body portions 180a and 180b) outside the passenger compartment 110, thereby protecting them from water. The waterproof tube 150 may cover the entire wire 120p and the like. A rubber bushing 152 is disposed between the waterproof tube 150 and the shield pipe 160.

(A-1-10-6. Shielded pipe 160)
The shield pipe 160 is made of a metal material (for example, aluminum). The shield pipe 160 covers the electric wires 120p, 120n, 122, 124p, 124n and the braided shields 130, 132 outside the passenger compartment 110, thereby protecting them from stones and the like. The shield pipe 160 may cover the entire wire 120p and the like.

(A-1-10-7. Clip 170)
As shown in FIGS. 4 and 5, the clip 170 (fixing member) fixes the electric wires 120p, 120n, 122, 124p, 124n, the separating portions 182a, 182b, or the waterproof tube 150. As shown in FIG. 4, the plurality of clips 170 are arranged on the stay 98 of the vehicle body frame 32 (here, the battery frame 96).

<A-2. Reduction effect of electromagnetic noise by magnetic core 140>
FIG. 7 is a diagram illustrating the electromagnetic noise reduction effect according to the present embodiment, the comparative example, and the first and second modifications. In FIG. 7, the horizontal axis represents the frequency [MHz] of electromagnetic noise from the PCU 22, and the vertical axis represents the magnetic field intensity [dBμA / m] around the core 140. FIG. 8 is a schematic overall configuration diagram of the vehicle 10 according to the first modification. The electromagnetic noise is generated from the PCU 22.

  As described above, in the present embodiment, the core 140 is disposed in the second separation portion 182b (FIG. 3). In FIG. 7, the characteristic P1 corresponds to this embodiment. In the comparative example, the magnetic core 140 is not provided. Therefore, the configuration without the core 140 in FIG. 3 is a comparative example. In FIG. 7, the characteristic P2 corresponds to the comparative example.

  As shown in FIG. 8, in the first modification, the core 140 is disposed in the first separation portion 182a. In FIG. 7, the characteristic P3 corresponds to the first modification. In the second modification, the core 140 is disposed so as to straddle the first separation unit 182a and the second separation unit 182b. Specifically, at the point where the first separation part 182a and the second separation part 182b merge (near the caulking part 220 in FIG. 5), both the first separation part 182a and the second separation part 182b are the core 140. Placed inside. In FIG. 7, the characteristic P4 corresponds to the second modification.

  As is clear from FIG. 7, the magnetic field strength is lower than the characteristic P2 of the comparative example, all of the characteristic P1, the characteristic P3 of the first modification, and the characteristic P4 of the second modification. In other words, all of the present embodiment, the first modified example, and the second modified example have a larger electromagnetic noise reduction effect than the comparative example. In particular, the present embodiment and the first modification have a remarkable effect of reducing electromagnetic noise.

<A-3. Effects of this embodiment>
As described above, according to the present embodiment, the first braided shield 130 is grounded to the vehicle body frame 32 (vehicle body) at the first separation portion 182a separated from the electric wires 120p, 120n, 124p, and 124n (FIG. 3 and FIG. 3). FIG. 4). Similarly, the second braided shield 132 is grounded to the vehicle body frame 32 (vehicle body) at the second separation portion 182b and the third separation portion 182c separated from the electric wire 122 (FIGS. 3 and 4). For this reason, it becomes possible to design the structure or position of the separating portions 182a, 182b, and 182c relatively freely.

  Further, the magnetic core 140 covers not the main body portions 180a and 180b covering the electric wires 120p, 120n, 122, 124p, and 124n, but the separating portion 182b separated from the electric wires 120p, 120n, 122, 124p, and 124n (see FIG. 3 and FIG. 3). FIG. 5). For this reason, the magnetic core 140 can be reduced in size by reducing the size of the separation part 182b because the wires 120p, 120n, 122, 124p, and 124n do not exist.

  In the present embodiment, the separating portions 182a, 182b, and 182c are twisted conducting wires (FIGS. 3 to 5). For this reason, it is possible to reduce the thickness (here, the diameter) of the separating portions 182a, 182b, and 182c, and as a result, the magnetic core 140 can be downsized. Moreover, since the conducting wires of the separating portions 182a, 182b, and 182c are twisted, the strength of the separating portions 182a, 182b, and 182c can be improved.

  In the present embodiment, the vehicle 10 includes a waterproof tube 150 that covers a portion of the main body 180a, 180b that is exposed outside the vehicle (FIGS. 3 to 6). Further, the separation portions 182a and 182b are provided in the passenger compartment 110 (FIGS. 3 and 4). Accordingly, even when it is relatively difficult to cover the separation portions 182a and 182b with the waterproof tube 150, the separation portions 182a and 182b are easily protected from water.

  In the present embodiment, the vehicle 10 includes a shield pipe 160 that covers a part of the main body portions 180a and 180b (FIGS. 3 and 6). Thereby, even when the electric wire structure 36 is exposed toward the outside of the vehicle, each part of the electric wire structure 36 can be easily protected from contact with stones or the like.

  In the present embodiment, the separating portions 182a, 182b, and 182c are fixed to the vehicle body frame 32 (vehicle body) by bolts 224 and 226 (FIGS. 3 and 4). As a result, the separating portions 182a, 182b, and 182c can be easily grounded.

  In the present embodiment, the vehicle 10 includes a high voltage battery 24, a step-down converter 26 provided adjacent to the high voltage battery 24, and a low voltage battery 28 as electric power components (FIG. 3). Further, the vehicle 10 includes high-voltage wires 120p and 120n that electrically connect the PCU 22 (power converter) and the high-voltage battery 24, and a low-voltage wire 122 that electrically connects the step-down converter 26 and the low-voltage battery 28 ( FIG. 3). Furthermore, the vehicle 10 includes a first braided shield 130 that covers the high-voltage electric wires 120p and 120n and a second braided shield 132 that covers the low-voltage electric wires 122 (FIG. 3). Furthermore, the vehicle 10 uses the first separation unit 182a separated from the high-voltage wires 120p and 120n on the high-voltage battery 24 side and the second separation unit 182b separated from the low-voltage wire 122 on the step-down converter 26 side as separation units. (FIGS. 3 and 4). The vehicle body grounding points of the first separation part 182a and the second separation part 182b are fixed together by bolts 224 (FIGS. 3 and 4).

  When the resistance of the contact portion between the braided shields 130 and 132 (the first separating portion 182a and the second separating portion 182b) and the vehicle body frame 32 (the vehicle body) is relatively large, the electromagnetic noise flowing into the braided shields 130 and 132 It becomes difficult to flow to the frame 32 side. Thereby, it becomes possible to limit the flow of electromagnetic noise and prevent the formation of an unintended noise route.

  In the present embodiment, the magnetic core 140 is provided in the second separation portion 182b (FIGS. 3 and 5). Accordingly, it is possible to enhance the noise reduction effect as compared with the case where the magnetic core 140 is provided across both the first separation part 182a and the second separation part 182b (second modification example in FIG. 7) (FIG. 7). Characteristics P1, P4). Therefore, the number of parts or cost can be reduced.

  In the present embodiment, the separators 182a and 182b are grounded to the battery frame 96 (vehicle body frame) that supports the high-voltage battery 24 (FIGS. 3 and 4). Separators 182a and 182b are fixed by clips 170 (fixing members) to stays 98 extending from battery frame 96 to PCU 22 (power converter) (FIGS. 4 and 5). Thereby, rocking | fluctuation of the separation parts 182a and 182b can be suppressed. Moreover, the movement of the magnetic core 140 covering the separation part 182b can be prevented.

  In this embodiment, the vehicle 10 has an inverter 72 for driving a motor 70 (compressor) of the air conditioner 30 as a power component (FIG. 3). The vehicle 10 includes air conditioner wires 124p and 124n that electrically connect the inverter 72 and the high-voltage battery 24 (FIG. 3). A part of the main body portion 180a of the braided shield 130 covers the high-voltage wires 120p and 120n and the air conditioner wires 124p and 124n together (FIGS. 3 and 6).

  According to the above, it is possible to reduce the number of parts by covering the high-voltage wires 120p, 120n and the air conditioner wires 124p, 124n together. Further, electromagnetic noise generated by the air conditioner inverter 72 can also be absorbed by the magnetic core 140.

B. Modifications It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various configurations can be adopted based on the description of the present specification. For example, the following configuration can be adopted.

<B-1. Applicable object>
In the above embodiment, the vehicle 10 is a hybrid vehicle having the engine 18 and the traveling motor 20 as drive sources (FIG. 3). However, for example, if attention is paid to the use of the separation parts 182a to 182c or the use of the magnetic core 140 covering the separation parts 182a to 182c, the present invention is not limited to this. The vehicle 10 may be a narrowly-defined electric vehicle (battery vehicle) having only the traveling motor 20 as a drive source, a fuel cell vehicle, or the like.

  In the said embodiment, the electric power system 12 or the electric wire structure 36 was applied to the vehicle 10 (FIG. 3). However, for example, if attention is paid to the use of the separation parts 182a to 182c or the use of the magnetic core 140 covering the separation parts 182a to 182c, the present invention is not limited to this. For example, the power system 12 or the electric wire structure 36 can be used for a moving object (or vehicle) such as a ship or an aircraft. Or you may apply the electric power system 12 or the electric wire structure 36 to a robot, a manufacturing apparatus, or household appliances.

<B-2. Configuration of Power System 12>
[B-2-1. Power components]
In the above-described embodiment, the traveling motor 20, the PCU 22, the high voltage battery 24, the step-down converter 26, the low voltage battery 28, and the air conditioner 30 are used as electric power components that transmit and receive electric power (FIG. 3). However, for example, if attention is paid to the use of the separation parts 182a to 182c or the use of the magnetic core 140 covering the separation parts 182a to 182c, the present invention is not limited to this. For example, one or more of the traveling motor 20, the PCU 22, the high voltage battery 24, the step-down converter 26, the low voltage battery 28, and the air conditioner 30 can be omitted. Alternatively, other power components (for example, a water heater) may be added.

[B-2-2. PCU22]
In the above embodiment, the motor 20 is used for driving or driving the vehicle 10 (FIG. 3). However, for example, if attention is paid to the use of the separation parts 182a to 182c or the use of the magnetic core 140 covering the separation parts 182a to 182c, the present invention is not limited to this. For example, the motor 20 may be used for in-vehicle equipment (for example, electric power steering, air compressor for fuel cell).

  In the above embodiment, the DC / DC converter 50 is for boosting and stepping down the input voltage to the traveling motor 20 (FIG. 3). However, for example, if attention is paid to the use of the separation parts 182a to 182c or the use of the magnetic core 140 covering the separation parts 182a to 182c, the present invention is not limited to this. For example, the converter 50 may be used for output control of the fuel cell.

[B-2-3. High voltage battery 24 and low voltage battery 28]
In the above embodiment, the high voltage battery 24 and the low voltage battery 28 are used as power sources (FIG. 3). However, for example, if attention is paid to the use of the separation parts 182a to 182c or the use of the magnetic core 140 covering the separation parts 182a to 182c, the present invention is not limited to this. For example, only one of the high voltage battery 24 and the low voltage battery 28 can be provided as a power source. Alternatively, another power source (for example, a fuel cell) may be provided in the vehicle 10 in addition to or instead of the high voltage battery 24 and / or the low voltage battery 28. Or you may provide the external power supply which supplies electric power to the vehicle 10 from the outside.

[B-2-4. Air conditioner 30]
In the above embodiment, the air conditioner 30 is provided (FIG. 3). However, for example, if attention is paid to the use of the separating parts 182a to 182c or the use of the magnetic core 140 covering the separating parts 182a to 182c, the air conditioner 30 can be omitted without being limited thereto.

[B-2-5. Electric wire structure 36]
(B-2-5-1. Braided shield 130, 132)
In the above embodiment, two braided shields 130 and 132 are provided (FIG. 3). However, only one of the braided shields 130, 132 can be provided. Alternatively, another braided shield other than the braided shields 130 and 132 can be provided. For example, a braided shield may be provided between the traveling motor 20 (first power component, first load) and the PCU 22 (power converter, second power component, second load).

  The 1st braided shield 130 of the said embodiment was provided corresponding to the high voltage electric wires 120p and 120n and the air conditioner electric wires 124p and 124n (FIG. 3). However, for example, if attention is paid to the use of at least one separation part 182a to 182c or the use of the magnetic core 140 covering the separation parts 182a and 182b, the present invention is not limited to this. For example, the first braided shield 130 may be provided corresponding to only the combination of the high-voltage wires 120p and 120n or only the combination of the air conditioner wires 124p and 124n. Alternatively, the first braided shield 130 can be provided corresponding to only one of the high-voltage electric wires 120p and 120n.

(B-2-5-2. Magnetic core 140)
In the above embodiment, the magnetic core 140 is provided in the second separation portion 182b (FIG. 3). However, for example, if attention is paid to the use of at least one separation unit 182a to 182c or the use of the magnetic core 140, the present invention is not limited to this. For example, the magnetic core 140 may be provided in the first separation portion 182a (see the first modification example in FIGS. 7 and 8) or the third separation portion 182c. Or the magnetic body core 140 can also be provided in both the 1st isolation | separation part 182a and the 2nd isolation | separation part 182b (refer the 2nd modification of FIG. 7).

  In the above embodiment, the number of the magnetic cores 140 is 1 (FIG. 3). However, for example, if attention is paid to the use of at least one separation unit 182a to 182c or the use of the magnetic core 140, the present invention is not limited to this. The number of the magnetic cores 140 provided in the separation part 182b may be two or more. Alternatively, if attention is paid to the use of at least one separation unit 182a to 182c, the core 140 may not be provided.

(B-2-5-3. Separation parts 182a, 182b, 182c)
In the above embodiment, the three separation parts 182a to 182c are provided (FIG. 3). However, one or two of the separation units 182a to 182c may be omitted.

  In the above embodiment, the separating portions 182a to 182c are grounded to the vehicle body frame 32 (FIG. 3). However, for example, from the viewpoint of grounding the separation units 182a to 182c, the present invention is not limited to this. Separating portions 182a to 182c may be grounded to a vehicle body (for example, floor panel 34) other than vehicle body frame 32.

  In the said embodiment, the conducting wire was twisted about each of separation part 182a-182c, and separation part 182a-182c was made thin (FIGS. 3-5). However, for example, from the viewpoint of providing a portion that separates from the main body portions 180a and 180b in the braided shields 130 and 132, the present invention is not limited to this, and the separating portions 182a to 182c may be grounded without twisting the lead wires. .

  In the said embodiment, the isolation | separation parts 182a and 182b were fixed with the same volt | bolt 224 (FIG. 3, FIG. 4). However, for example, from the viewpoint of grounding the separation units 182a and 182b, the present invention is not limited to this. For example, the separation units 182a and 182b may be grounded separately.

  In the above embodiment, the separating portions 182a and 182b are fixed to the stay 98 of the vehicle body frame 32 (FIG. 4). However, for example, from the viewpoint of grounding or fixing each of the separation units 182a and 182b, the present invention is not limited to this. For example, the separating portions 182a and 182b may be grounded or fixed to portions other than the stay 98.

  In the said embodiment, isolation | separation part 182a-182c was fixed with the volt | bolts 224 and 226 (FIG. 3, FIG. 4). However, for example, from the viewpoint of grounding each of the separation units 182a to 182c, the configuration is not limited thereto. For example, the separators 182a to 182c may be fixed by melting them by heat treatment (including welding).

(B-2-5-4. Waterproof tube 150 and shield pipe 160)
In the said embodiment, the waterproof tube 150 and the shield pipe 160 were provided (FIGS. 3-6). However, for example, if attention is paid to the use of at least one separation unit 182a to 182c or the use of the magnetic core 140, the present invention is not limited to this. For example, one or both of the waterproof tube 150 and the shield pipe 160 can be omitted.

10 ... Vehicle 24 ... High-voltage battery (power components, power supply)
26 ... Step-down converter (power converter, power component, power load)
28 ... Low voltage battery (power components, power supply)
30 ... Air conditioner (power converter, power component, power load)
32 ... Body frame (body)
36 ... Electric wire structure 50 ... DC / DC converter (power converter, power component, power load)
52. Inverter for traveling motor (power converter, power component, power load)
60, 62 ... Switching element 72 ... Inverter for air conditioner (power converter, power component, power load)
94 ... Rear frame (body frame that supports the high-voltage battery)
98 ... Stay 120p, 120n ... High voltage electric wire (electric wire)
122 ... Low voltage electric wire
124p, 124n ... Air conditioner wires (wires)
130 ... 1st braided shield (braided shield)
132 ... 2nd braided shield (braided shield)
140 ... Magnetic body core 150 ... Waterproof tube 160 ... Shield pipe 180a, 180b ... Main part 182a ... First separation part (separation part)
182b ... second separation part (separation part)
182c ... Third separation part (separation part)
224, 226 ... Bolt

Claims (9)

A power converter having a switching element;
One or more power components for transferring power;
A vehicle comprising: the power conversion device and the power component; or an electric wire connecting the power components,
Furthermore, the vehicle
A braided shield having a main body that covers the electric wire and a separation portion that is separated from the electric wire and grounded to a vehicle body;
A hollow magnetic core covering the separation part ,
The vehicle is
A first electric wire;
With the second wire
As the electric wire,
Furthermore, the vehicle is
A first braided shield covering the first electric wire;
A second braided shield covering the second electric wire;
As the braided shield,
Furthermore, the vehicle is
A first separation part separated from the first electric wire;
A second separation portion separated from the second electric wire;
As the separation part,
Vehicle, characterized in that the first separation unit and the vehicle body ground point of the second separation unit that is collectively bolted. The vehicle according to claim 1,
A vehicle characterized in that at least a part of the separation part has a conductive wire twisted. In the vehicle according to claim 1 or 2,
The vehicle includes a waterproof tube that covers at least a portion of the main body exposed outside the vehicle,
The separation unit is provided in a vehicle interior. The vehicle according to any one of claims 1 to 3,
The vehicle includes a shield pipe that covers at least a part of the main body. In the vehicle according to any one of claims 1 to 4,
The vehicle is
A high voltage battery;
A buck converter,
A low-voltage battery as the power component,
The first electric wire is a high-voltage electric wire that electrically connects the power converter and the high-voltage battery,
The second electric wire is a low-voltage electric wire that electrically connects the step-down converter and the low-voltage battery ,
Wherein the first separation unit is separated from the first wire in the high-voltage battery side,
The second separation unit is a vehicle, characterized in that it is separated from the second wire at the buck converter side. The vehicle according to claim 5 , wherein
The said magnetic body core is provided in any one of a said 1st separation part and a said 2nd separation part. The vehicle characterized by the above-mentioned. In the vehicle according to claim 5 or 6 ,
At least one of the first separation part or the second separation part is fixed with a clip to a stay extending from the vehicle body frame supporting the high-voltage battery toward the power converter. In the vehicle according to any one of claims 5 to 7 ,
The vehicle has an inverter for driving a compressor of an air conditioner as the power component,
Furthermore, the vehicle has an electric wire for an air conditioner that electrically connects the inverter and the high voltage battery as the electric wire,
At least a part of the main body of the braided shield collectively covers the high-voltage electric wire and the air conditioner electric wire. An electric wire structure including an electric wire connecting a power conversion device having a switching element and a power source, or between the power conversion device and a first power load, or between the first power load and a second power load,
Furthermore, the wire structure is
A braided shield having a main body that covers the electric wire and a separation portion that is separated from the electric wire and grounded;
A hollow magnetic core covering the separation part ,
The wire structure is
A first electric wire;
With the second wire
As the electric wire,
Furthermore, the wire structure is
A first braided shield covering the first electric wire;
A second braided shield covering the second electric wire;
As the braided shield,
Furthermore, the wire structure is
A first separation part separated from the first electric wire;
A second separation portion separated from the second electric wire;
As the separation part,
Wire structure said first separation unit and the vehicle body ground point of the second separation unit, characterized in that that will be collectively bolted.

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