Power supply circuit for mobile devices

Abstract

To provide a power supply circuit capable of supplying power to a load even when an excessive shock occurs to a mobile.SOLUTION: A power supply circuit includes a first circuit breaker 50a that switches between a conducting state and an interrupting state, and a second circuit breaker 56a that is provided in a second power transmission path 28 that sends power from a second power source 20 to a load 14, and switches between a conductive state and a cutoff state between the second power source 20 and the load 14. The first circuit breaker 50a includes a first fixed contact and a first movable contact, and the second circuit breaker 56a includes a second fixed contact and a second movable contact, and the moving direction of the first movable contact and the moving direction of the second movable contact intersect.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a power supply circuit for a moving body.

Background Art

[0002] Patent Document 1 below discloses a power supply circuit for an aircraft as a moving body. The power supply circuit can send power to a load from both a generator and a battery. In a power transmission line for sending electricity from the generator to the load, a circuit breaker is provided. A circuit breaker is also provided in a power transmission line for sending electricity from the battery to the load.

Prior Art Document

Patent Document

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the power supply circuit for a moving body disclosed in Patent Document 1 above, when an excessive impact is input to the moving body, each of the plurality of circuit breakers may operate due to the impact. In this case, the power supply from the generator to the load may be interrupted, and the power supply from the battery to the load may also be interrupted. In that case, a problem arises that power cannot be supplied to the load.

[0005] An object of the present invention is to solve the above-described problems.

Means for Solving the Problems

[0006] An aspect of the present invention is a power supply circuit for a mobile body, the power supply circuit comprising: a first transmission line that sends power from a first power source to a load; a second transmission line that sends power from a second power source to the load; a first circuit breaker provided in the first transmission line that switches between a conduction state in which electricity flows and a disconnection state in which the flow of electricity is interrupted between the first power source and the load; and a second circuit breaker provided in the second transmission line that switches between the conduction state and the disconnection state between the second power source and the load, wherein the first circuit breaker has a first fixed contact and a first movable contact that moves relative to the first fixed contact, and the second circuit breaker has a second fixed contact and a second movable contact that moves relative to the second fixed contact, and the direction of movement of the first movable contact and the direction of movement of the second movable contact intersect. [Effects of the Invention]

[0007] This invention makes it possible to supply power to a load even when an excessive impact is applied to a moving object. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a circuit diagram of the power supply circuit. [Figure 2] Figure 2 is a schematic diagram of a circuit breaker. [Figure 3] Figure 3 is a schematic diagram of the main junction box. [Figure 4] Figure 4 is a schematic diagram of the first battery junction box and the second battery junction box. [Figure 5] Figure 5 is a circuit diagram of the power supply circuit. [Figure 6] Figure 6 is a circuit diagram of the power supply circuit. [Modes for carrying out the invention]

[0009] [First Embodiment] [Configuration of the power supply circuit] Figure 1 is a circuit diagram of the power supply circuit 10. The power supply circuit 10 is mounted on the aircraft 12. The aircraft 12 corresponds to the mobile body of the present invention.

[0010] The aircraft 12 has a first load device 14 and a second load device 16. The first load device 14 is, for example, a vertical thruster that generates thrust in the vertical direction relative to the aircraft 12. The second load device 16 is, for example, a horizontal thruster that generates thrust in the horizontal direction relative to the aircraft 12. The first load device 14 and the second load device 16 correspond to the loads of the present invention.

[0011] The aircraft 12 has a generator 18, a first battery 20, and a second battery 22. The first load device 14 and the second load device 16 are each driven by electricity generated by the generator 18. The first load device 14 is driven by electricity stored in the first battery 20. The second load device 16 is driven by electricity stored in the second battery 22. The generator 18 corresponds to the first power source of the present invention. The first battery 20 and the second battery 22 each correspond to the second power source of the present invention.

[0012] The power supply circuit 10 has a first transmission line 24. The first transmission line 24 supplies power from the generator 18 to the first load device 14 and the second load device 16, respectively.

[0013] A main junction box 26 is provided in the first power transmission line 24. The main junction box 26 has circuit breakers 50a and circuit breakers 50b.

[0014] The circuit breaker 50a is installed on the positive terminal of the first power transmission line 24. The circuit breaker 50a switches between a conductive state where electricity flows and an interrupted state where the flow of electricity is blocked between the generator 18 and the first load device 14. Furthermore, the circuit breaker 50a switches between a conductive state where electricity flows and an interrupted state where the flow of electricity is blocked between the generator 18 and the second load device 16. The circuit breaker 50a corresponds to the first circuit breaker of the present invention.

[0015] The circuit breaker 50b is provided on the negative wire of the first power transmission line 24. The circuit breaker 50b switches between a conducting state in which electricity flows and a blocking state in which the flow of electricity is blocked, between the generator 18 and the first load device 14. Further, the circuit breaker 50b switches between a conducting state in which electricity flows and a blocking state in which the flow of electricity is blocked, between the generator 18 and the second load device 16. The circuit breaker 50b corresponds to the third circuit breaker of the present invention.

[0016] When either one of the circuit breaker 50a and the circuit breaker 50b is in the blocking state, power is not supplied from the generator 18 to each of the first load device 14 and the second load device 16.

[0017] The main junction box 26 has a circuit breaker 52a and a circuit breaker 52b. The circuit breaker 52a is provided on the positive wire of the first power transmission line 24. The circuit breaker 52a switches between a conducting state in which electricity flows and a blocking state in which the flow of electricity is blocked, between the generator 18 and the first load device 14. The circuit breaker 52b is provided on the negative wire of the first power transmission line 24. The circuit breaker 52b switches between a conducting state in which electricity flows and a blocking state in which the flow of electricity is blocked, between the generator 18 and the first load device 14. When either one of the circuit breaker 52a and the circuit breaker 52b is in the blocking state, power is not supplied from the generator 18 to the first load device 14.

[0018] The main junction box 26 has a circuit breaker 54a and a circuit breaker 54b. The circuit breaker 54a is provided on the positive wire of the first power transmission line 24.

[0019] The circuit breaker 54a switches between a conducting state in which electricity flows and a blocking state in which the flow of electricity is blocked, between the generator 18 and the second load device 16. The circuit breaker 54b is provided on the negative wire of the first power transmission line 24. The circuit breaker 54b switches between a conducting state in which electricity flows and a blocking state in which the flow of electricity is blocked, between the generator 18 and the second load device 16. When either one of the circuit breaker 54a and the circuit breaker 54b is in the blocking state, power is not supplied from the generator 18 to the second load device 16.

[0020] The power supply circuit 10 has a second power transmission line 28. The second power transmission line 28 supplies power from the first battery 20 to the first load device 14.

[0021] A first battery junction box 30 is provided in the second power transmission line 28. The first battery junction box 30 has a circuit breaker 56a and a circuit breaker 56b.

[0022] The circuit breaker 56a is provided on the positive electrode line of the second power transmission line 28. The circuit breaker 56a switches between a conducting state in which electricity flows and a blocking state in which the flow of electricity is blocked between the first battery 20 and the first load device 14. The circuit breaker 56b is provided on the negative electrode line of the second power transmission line 28. The circuit breaker 56b switches between a conducting state in which electricity flows and a blocking state in which the flow of electricity is blocked between the first battery 20 and the first load device 14. When either one of the circuit breaker 56a and the circuit breaker 56b is in the blocking state, power is not supplied from the first battery 20 to the first load device 14. The circuit breaker 56a corresponds to the second circuit breaker of the present invention. The circuit breaker 56b corresponds to the fourth circuit breaker of the present invention.

[0023] The power supply circuit 10 has a third power transmission line 32. The third power transmission line 32 supplies power from the second battery 22 to the second load device 16.

[0024] A second battery junction box 34 is provided in the third power transmission line 32. The second battery junction box 34 has a circuit breaker 58a and a circuit breaker 58b. [[ID=十七]]

[0025] Circuit breaker 58a is installed on the positive terminal of the third power transmission line 32. Circuit breaker 58a switches between a conductive state where electricity flows and an interrupted state where the flow of electricity is blocked between the second battery 22 and the second load device 16. Circuit breaker 58b is installed on the negative terminal of the third power transmission line 32. Circuit breaker 58b switches between a conductive state where electricity flows and an interrupted state where the flow of electricity is blocked between the second battery 22 and the second load device 16. If either circuit breaker 58a or circuit breaker 58b is in the interrupted state, no power is supplied from the second battery 22 to the second load device 16. Circuit breaker 58a corresponds to the second circuit breaker of the present invention. Circuit breaker 58b corresponds to the fourth circuit breaker of the present invention.

[0026] A power control unit (hereinafter referred to as PCU) 36 is provided between the generator 18 and the power supply circuit 10. The PCU 36 controls voltage and current. The PCU 36 performs voltage boosting and voltage reduction. The PCU 36 converts the AC power generated by the generator 18 into DC power and outputs it to the first power transmission line 24. The PCU 36 converts the DC power supplied from the first battery 20 or the second battery 22 into AC power and outputs it to the generator 18.

[0027] An inverter 35 is provided between the first load device 14 and the power supply circuit 10. An inverter 37 is provided between the second load device 16 and the power supply circuit 10. Inverters 35 and 37 control voltage and current. Inverters 35 and 37 perform voltage boosting and voltage reduction. Each of the inverters 35 and 37 converts the DC power supplied from the PCU 36, the first battery 20, and the second battery 22 into AC power and outputs it to the first load device 14 and the second load device 16, respectively.

[0028] The power supply circuit 10 may include elements such as sensors, fuses, circuit breakers, diodes, transistors, resistors, coils, and capacitors. The first battery 20 and the second battery 22 may each be capacitors. A pre-charge circuit may be provided between the first battery 20 and the first load device 14. Similarly, a pre-charge circuit may be provided between the second battery 22 and the second load device 16.

[0029] [Circuit breaker configuration] Figure 2 is a schematic diagram of a circuit breaker 50a. The circuit breaker 50a has a fixed core 60, a movable core 62, a coil 64, and a spring 66. The movable core 62 moves relative to the fixed core 60. When current flows through the coil 64, the fixed core 60 is energized. In this case, the movable core 62 moves toward the fixed core 60 due to the magnetic force of the fixed core 60. When no current flows through the coil 64, the fixed core 60 is not energized. In this case, the movable core 62 moves toward the fixed core 60 due to the biasing force of the spring 66.

[0030] The circuit breaker 50a has a movable contact 68 and two fixed contacts 70. The movable contact 68 moves together with the movable core 62. When the movable core 62 moves toward the fixed core 60, the movable contact 68 moves toward the two fixed contacts 70. In this case, the movable contact 68 connects the two fixed contacts 70. As a result, the circuit breaker 50a becomes conductive. When the movable core 62 moves toward the fixed core 60, the movable contact 68 moves toward the two fixed contacts 70. In this case, the connection between the two fixed contacts 70 is broken. As a result, the circuit breaker 50a becomes tripped.

[0031] The above describes the configuration of circuit breaker 50a, but the configurations of circuit breakers 50b, 52a, 52b, 54a, 54b, 56a, 56b, 58a, and 58b are similar.

[0032] The movable contact 68 in circuit breaker 50a corresponds to the first movable contact of the present invention. The movable contact 68 in circuit breakers 56a and 58a, respectively, corresponds to the second movable contact of the present invention. The movable contact 68 in circuit breaker 50b corresponds to the third movable contact of the present invention. The movable contact 68 in circuit breakers 56b and 58b correspond to the fourth movable contact of the present invention. The fixed contact 70 in circuit breaker 50a corresponds to the first fixed contact of the present invention. The fixed contact 70 in circuit breakers 56a and 58a, respectively, corresponds to the second fixed contact of the present invention. The fixed contact 70 in circuit breaker 50b corresponds to the third fixed contact of the present invention. The fixed contact 70 in circuit breakers 56b and 58b correspond to the fourth fixed contact of the present invention.

[0033] Hereinafter, the state in which each of the circuit breakers 50a, 50b, 52a, 52b, 54a, 54b, 56a, 56b, 58a, and 58b is conducting may be described as "on". Also, the state in which each of the circuit breakers 50a, 50b, 52a, 52b, 54a, 54b, 56a, 56b, 58a, and 58b is interrupted may be described as "off".

[0034] Figure 3 is a schematic diagram of the main junction box 26. The X-axis direction indicated by the arrow in Figure 3 represents the front-to-back direction of the aircraft 12. The Y-axis direction indicated by the arrow in Figure 3 represents the width direction of the aircraft 12. The Z-axis direction indicated by the arrow in Figure 3 represents the up-and-down direction of the aircraft 12.

[0035] In Figure 3, the "on" direction indicated by the arrows represents the direction in which the movable contact 68 moves toward the fixed contact 70 in each circuit breaker of the main junction box 26. In Figure 3, the "off" direction indicated by the arrows represents the direction in which the movable contact 68 moves toward the fixed contact 70 in each circuit breaker of the main junction box 26. The circuit breakers of the main junction box 26 refer to circuit breakers 50a, 50b, 52a, 52b, 54a, and 54b, respectively.

[0036] In circuit breaker 50a, the direction in which the movable contact 68 approaches the fixed contact 70 is the negative side in the Y-axis direction. In circuit breaker 50a, the direction in which the movable contact 68 moves away from the fixed contact 70 is the positive side in the Y-axis direction. In circuit breaker 50b, the direction in which the movable contact 68 approaches the fixed contact 70 is the positive side in the Y-axis direction. In circuit breaker 50b, the direction in which the movable contact 68 moves away from the fixed contact 70 is the negative side in the Y-axis direction.

[0037] In other words, the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 50a is opposite to the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 50b. To put it another way, the angle between the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 50a and the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 50b is 180°.

[0038] In circuit breaker 52a, the direction in which the movable contact 68 approaches the fixed contact 70 is the negative side in the Y-axis direction. In circuit breaker 52a, the direction in which the movable contact 68 moves away from the fixed contact 70 is the positive side in the Y-axis direction. In circuit breaker 52b, the direction in which the movable contact 68 approaches the fixed contact 70 is the positive side in the Y-axis direction. In circuit breaker 52b, the direction in which the movable contact 68 moves away from the fixed contact 70 is the negative side in the Y-axis direction.

[0039] In other words, the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 52a is opposite to the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 52b. To put it another way, the angle between the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 52a and the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 52b is 180°.

[0040] In circuit breaker 54a, the direction in which the movable contact 68 approaches the fixed contact 70 is the negative side in the Y-axis direction. In circuit breaker 54a, the direction in which the movable contact 68 moves away from the fixed contact 70 is the positive side in the Y-axis direction. In circuit breaker 54b, the direction in which the movable contact 68 approaches the fixed contact 70 is the positive side in the Y-axis direction. In circuit breaker 54b, the direction in which the movable contact 68 moves away from the fixed contact 70 is the negative side in the Y-axis direction.

[0041] In other words, the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 54a is opposite to the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 54b. To put it another way, the angle between the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 54a and the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 54b is 180°.

[0042] Figure 4 is a schematic diagram of the first battery junction box 30 and the second battery junction box 34. The X-axis direction indicated by the arrow in Figure 4 represents the front-to-back direction of the aircraft 12. The Y-axis direction indicated by the arrow in Figure 4 represents the width direction of the aircraft 12. The Z-axis direction indicated by the arrow in Figure 4 represents the up-and-down direction of the aircraft 12.

[0043] In Figure 4, the "on" direction indicated by the arrows represents the direction in which the movable contact 68 moves toward the fixed contact 70 in each circuit breaker of the first battery junction box 30. In Figure 4, the "off" direction indicated by the arrows represents the direction in which the movable contact 68 moves toward the fixed contact 70 in each circuit breaker of the first battery junction box 30. Each circuit breaker of the first battery junction box 30 refers to circuit breaker 56a and circuit breaker 56b, respectively.

[0044] In Figure 4, the "on" direction indicated by the arrows represents the direction in which the movable contact 68 moves toward the fixed contact 70 in each circuit breaker of the second battery junction box 34. In Figure 4, the "off" direction indicated by the arrows represents the direction in which the movable contact 68 moves toward the fixed contact 70 in each circuit breaker of the second battery junction box 34. Each circuit breaker of the second battery junction box 34 refers to circuit breaker 58a and circuit breaker 58b, respectively.

[0045] In circuit breaker 56a, the direction in which the movable contact 68 approaches the fixed contact 70 is the positive X-axis direction. In circuit breaker 56a, the direction in which the movable contact 68 moves away from the fixed contact 70 is the negative X-axis direction. In circuit breaker 56b, the direction in which the movable contact 68 approaches the fixed contact 70 is the negative X-axis direction. In circuit breaker 56b, the direction in which the movable contact 68 moves away from the fixed contact 70 is the positive X-axis direction.

[0046] In other words, the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 56a is opposite to the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 56b. To put it another way, the angle between the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 56a and the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 56b is 180°.

[0047] The direction of movement of the movable contacts 68 in each circuit breaker of the first battery junction box 30 is in the X-axis direction. In contrast, as shown in Figure 3, the direction of movement of the movable contacts 68 in each circuit breaker of the main junction box 26 is in the Y-axis direction.

[0048] In other words, the direction of movement of the movable contacts 68 in each circuit breaker of the first battery junction box 30 intersects with the direction of movement of the movable contacts 68 in each circuit breaker of the main junction box 26. To put it another way, the angle between the direction of movement of the movable contacts 68 in each circuit breaker of the first battery junction box 30 and the direction of movement of the movable contacts 68 in each circuit breaker of the main junction box 26 is 90°.

[0049] In circuit breaker 58a, the direction in which the movable contact 68 approaches the fixed contact 70 is the positive X-axis direction. In circuit breaker 58a, the direction in which the movable contact 68 moves away from the fixed contact 70 is the negative X-axis direction. In circuit breaker 58b, the direction in which the movable contact 68 approaches the fixed contact 70 is the negative X-axis direction. In circuit breaker 58b, the direction in which the movable contact 68 moves away from the fixed contact 70 is the positive X-axis direction.

[0050] In other words, the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 58a is opposite to the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 58b. To put it another way, the angle between the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 58a and the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 58b is 180°.

[0051] The direction of movement of the movable contacts 68 in each circuit breaker of the second battery junction box 34 is in the X-axis direction. In contrast, as shown in Figure 3, the direction of movement of the movable contacts 68 in each circuit breaker of the main junction box 26 is in the Y-axis direction.

[0052] In other words, the direction of movement of the movable contacts 68 in each circuit breaker of the second battery junction box 34 intersects with the direction of movement of the movable contacts 68 in each circuit breaker of the main junction box 26. To put it another way, the angle between the direction of movement of the movable contacts 68 in each circuit breaker of the second battery junction box 34 and the direction of movement of the movable contacts 68 in each circuit breaker of the main junction box 26 is 90°.

[0053] [Effects and Effects] Circuit breaker 50a switches between a conductive state and an interrupted state by the movement of the movable contact 68 relative to the fixed contact 70. If an excessive impact is applied to the aircraft 12, the movable contact 68 may move due to the impact. In that case, there is a risk that circuit breaker 50a may switch between a conductive state and an interrupted state. Similarly, in each of circuit breakers 50b, 52a, 52b, 54a, 54b, 56a, 56b, 58a, and 58b, there is a risk that the conductive state and the interrupted state may switch due to an impact.

[0054] In the power supply circuit 10 of this embodiment, power can be supplied to the first load device 14 from both the generator 18 and the first battery 20. However, if the aircraft 12 is subjected to an excessive impact, it is possible that power cannot be supplied to the first load device 14 from either the generator 18 or the first battery 20. If, for example, both the circuit breaker 52a of the main junction box 26 and the circuit breaker 56a of the first battery junction box 30 are tripped due to the impact, power will not be supplied to the first load device 14. In this case, the first load device 14 cannot continue to operate. Similarly, if the aircraft 12 is subjected to an excessive impact, it is possible that the second load device 16 will not be able to continue to operate.

[0055] In the power supply circuit 10 of this embodiment, the direction of movement of the movable contacts 68 in each circuit breaker of the main junction box 26 intersects with the direction of movement of the movable contacts 68 in each circuit breaker of the first battery junction box 30. More specifically, the angle between the direction of movement of the movable contacts 68 in each circuit breaker of the main junction box 26 and the direction of movement of the movable contacts 68 in each circuit breaker of the first battery junction box 30 is 90°.

[0056] Furthermore, in the power supply circuit 10 of this embodiment, the direction of movement of the movable contacts 68 in each circuit breaker of the main junction box 26 intersects with the direction of movement of the movable contacts 68 in each circuit breaker of the second battery junction box 34. More specifically, the angle between the direction of movement of the movable contacts 68 in each circuit breaker of the main junction box 26 and the direction of movement of the movable contacts 68 in each circuit breaker of the second battery junction box 34 is 90°.

[0057] As a result, even if the aircraft 12 is subjected to an excessive impact, the power supply circuit 10 of this embodiment can prevent the circuit breakers in the main junction box 26 and the circuit breakers in the first battery junction box 30 from simultaneously tripping. Therefore, power can be supplied to the first load device 14 from at least one of the generator 18 and the first battery 20. Consequently, the first load device 14 can continue to operate.

[0058] Furthermore, even if the aircraft 12 is subjected to an excessive impact, the power supply circuit 10 of this embodiment can prevent the circuit breakers in the main junction box 26 and the circuit breakers in the second battery junction box 34 from simultaneously tripping. As a result, power can be supplied to the second load device 16 from at least one of the generator 18 and the second battery 22. Consequently, the second load device 16 can continue to operate.

[0059] If the flow of electricity between the generator 18 and the first load device 14 is interrupted, the power supply circuit 10 of this embodiment needs to maintain the state in which the flow of electricity between the generator 18 and the first load device 14 is interrupted, even if the aircraft 12 is subjected to an excessive impact. Similarly, if the flow of electricity between the generator 18 and the second load device 16 is interrupted, the state in which the flow of electricity between the generator 18 and the second load device 16 is interrupted needs to be maintained, even if the aircraft 12 is subjected to an excessive impact.

[0060] Furthermore, if the electrical flow between the first battery 20 and the first load device 14 is interrupted, it is necessary that the state in which the electrical flow between the first battery 20 and the first load device 14 is interrupted is maintained even if the aircraft 12 is subjected to an excessive impact. In addition, if the electrical flow between the second battery 22 and the second load device 16 is interrupted, it is necessary that the state in which the electrical flow between the second battery 22 and the second load device 16 is interrupted is maintained even if the aircraft 12 is subjected to an excessive impact.

[0061] In the power supply circuit 10 of this embodiment, the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 50a is opposite to the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 50b. More specifically, the angle between the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 50a and the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 50b is 180°.

[0062] For example, if circuit breaker 50a is in the tripped state and circuit breaker 50b is in the conducting state, the flow of electricity between the generator 18 and the first load device 14 is interrupted. In this case, the flow of electricity between the generator 18 and the second load device 16 is also interrupted. Due to an impact, if the movable contact 68 of circuit breaker 50a moves toward the fixed contact 70, the movable contact 68 of circuit breaker 50b moves toward the fixed contact 70. As a result, circuit breaker 50a becomes conducting, but circuit breaker 50b remains tripped. Consequently, the state in which the flow of electricity between the generator 18 and the first load device 14 is interrupted can be maintained. Furthermore, the state in which the flow of electricity between the generator 18 and the second load device 16 is interrupted can be maintained.

[0063] In the power supply circuit 10 of this embodiment, the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 52a is opposite to the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 52b. More specifically, the angle between the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 52a and the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 52b is 180°. As a result, even if an excessive impact is input to the aircraft 12, the state in which the flow of electricity between the generator 18 and the first load device 14 is interrupted can be maintained.

[0064] In the power supply circuit 10 of this embodiment, the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 54a is opposite to the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 54b. More specifically, the angle between the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 54a and the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 54b is 180°. As a result, even if an excessive impact is input to the aircraft 12, the state in which the flow of electricity between the generator 18 and the second load device 16 is interrupted can be maintained.

[0065] In the power supply circuit 10 of this embodiment, the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 56a is opposite to the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 56b. More specifically, the angle between the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 56a and the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 56b is 180°. As a result, even if an excessive impact is input to the aircraft 12, the state in which the flow of electricity between the first battery 20 and the first load device 14 is interrupted can be maintained.

[0066] In the power supply circuit 10 of this embodiment, the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 58a is opposite to the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 58b. More specifically, the angle between the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 58a and the direction in which the movable contact 68 approaches the fixed contact 70 in circuit breaker 58b is 180°. As a result, even if an excessive impact is input to the aircraft 12, the state in which the flow of electricity between the second battery 22 and the second load device 16 is interrupted can be maintained.

[0067] [Example 1] Figure 5 is a circuit diagram of the power supply circuit 10. The aircraft 12 has a load device 38. The aircraft 12 has a first battery 40 and a second battery 42. The power supply circuit 10 has a first transmission line 44. The first transmission line 44 supplies power from the first battery 40 to the load device 38.

[0068] A first battery junction box 46 is provided in the first power transmission line 44. The first battery junction box 46 has circuit breakers 90a and 90b.

[0069] Circuit breaker 90a is installed on the positive terminal of the first power transmission line 44. Circuit breaker 90a switches between a conductive state where electricity flows and an interrupted state where the flow of electricity is blocked between the first battery 40 and the load device 38. Circuit breaker 90b is installed on the negative terminal of the first power transmission line 44. Circuit breaker 90b switches between a conductive state where electricity flows and an interrupted state where the flow of electricity is blocked between the first battery 40 and the load device 38.

[0070] A second battery junction box 48 is provided in the second power transmission line 47. The second battery junction box 48 has circuit breakers 92a and 92b.

[0071] Circuit breaker 92a is installed on the positive terminal of the second power transmission line 47. Circuit breaker 92a switches between a conductive state where electricity flows and an interrupted state where the flow of electricity is blocked between the second battery 42 and the load device 38. Circuit breaker 92b is installed on the negative terminal of the second power transmission line 47. Circuit breaker 92b switches between a conductive state where electricity flows and an interrupted state where the flow of electricity is blocked between the second battery 42 and the load device 38.

[0072] An inverter 39 is provided between the load device 38 and the power supply circuit 10. The inverter 39 controls voltage and current. The inverter 39 performs voltage boosting and voltage reduction. The inverter 39 converts the DC power supplied from the first battery 40 and the second battery 42 into AC power and outputs it to the load device 38.

[0073] The direction of movement of the movable contacts 68 in each circuit breaker of the first battery junction box 46 intersects with the direction of movement of the movable contacts 68 in each circuit breaker of the second battery junction box 48. Furthermore, the angle between the direction of movement of the movable contacts 68 in each circuit breaker of the first battery junction box 46 and the direction of movement of the movable contacts 68 in each circuit breaker of the second battery junction box 48 is 90°.

[0074] In the first battery junction box 46, each circuit breaker refers to circuit breaker 90a and circuit breaker 90b, respectively. In the second battery junction box 48, each circuit breaker refers to circuit breaker 92a and circuit breaker 92b, respectively.

[0075] [Differentiation 2] Figure 6 is a circuit diagram of the power supply circuit 10. The aircraft 12 has a first load device 72 and a second load device 74. The aircraft 12 also has a battery 76 and a generator 78.

[0076] The power supply circuit 10 has a first transmission line 80. The first transmission line 80 supplies power from the battery 76 to the first load device 72 and the second load device 74.

[0077] A battery junction box 82 is provided in the first power transmission line 80. The battery junction box 82 has circuit breakers 94a and 94b.

[0078] The circuit breaker 94a is installed on the positive terminal of the first power transmission line 80. The circuit breaker 94a switches between a conductive state where electricity flows and an interrupted state where the flow of electricity is blocked between the battery 76 and the first load device 72. Furthermore, the circuit breaker 94a switches between a conductive state where electricity flows and an interrupted state where the flow of electricity is blocked between the battery 76 and the second load device 74.

[0079] The circuit breaker 94b is installed on the negative terminal of the first power transmission line 80. The circuit breaker 94b switches between a conductive state where electricity flows and an interrupted state where the flow of electricity is blocked between the battery 76 and the first load device 72. Furthermore, the circuit breaker 94b switches between a conductive state where electricity flows and an interrupted state where the flow of electricity is blocked between the battery 76 and the second load device 74.

[0080] The power supply circuit 10 has a second transmission line 84. The second transmission line 84 supplies power from the generator 78 to the first load device 72 and the second load device 74.

[0081] A main junction box 86 is provided in the second power transmission line 84. The main junction box 86 has circuit breakers 96a and 96b.

[0082] The circuit breaker 96a is installed on the positive terminal of the second power transmission line 84. The circuit breaker 96a switches between a conductive state where electricity flows and an interrupted state where the flow of electricity is blocked between the generator 78 and the first load device 72. Furthermore, the circuit breaker 96a switches between a conductive state where electricity flows and an interrupted state where the flow of electricity is blocked between the generator 78 and the second load device 74.

[0083] The circuit breaker 96b is installed on the negative pole of the second power transmission line 84. The circuit breaker 96b switches between a conductive state where electricity flows and an interrupted state where the flow of electricity is blocked between the generator 78 and the first load device 72. Furthermore, the circuit breaker 96b switches between a conductive state where electricity flows and an interrupted state where the flow of electricity is blocked between the generator 78 and the second load device 74.

[0084] A PCU 36 is provided between the generator 78 and the power supply circuit 10. The PCU 36 controls voltage and current. The PCU 36 performs voltage boosting and voltage reduction. The PCU 36 converts the AC power generated by the generator 78 into DC power and outputs it to the second transmission line 84. The PCU 36 converts the DC power supplied from the battery 76 into AC power and outputs it to the generator 78.

[0085] An inverter 35 is provided between the first load device 72 and the power supply circuit 10. An inverter 37 is provided between the second load device 74 and the power supply circuit 10. Inverters 35 and 37 control voltage and current. Inverters 35 and 37 perform voltage boosting and voltage reduction. Each of the inverters 35 and 37 converts the DC power supplied from the PCU 36 and battery 76 into AC power and outputs it to the first load device 72 and the second load device 74, respectively.

[0086] The direction of movement of the movable contacts 68 in each circuit breaker of the battery junction box 82 intersects with the direction of movement of the movable contacts 68 in each circuit breaker of the main junction box 86. Furthermore, the angle between the direction of movement of the movable contacts 68 in each circuit breaker of the battery junction box 82 and the direction of movement of the movable contacts 68 in each circuit breaker of the main junction box 86 is 90°.

[0087] [Difference 3] In the power supply circuit 10 of the first embodiment, the angle between the direction of movement of the movable contacts 68 in each circuit breaker of the main junction box 26 and the direction of movement of the movable contacts 68 in each circuit breaker of the first battery junction box 30 is 90°. In contrast, the angle between the direction of movement of the movable contacts 68 in each circuit breaker of the main junction box 26 and the direction of movement of the movable contacts 68 in each circuit breaker of the first battery junction box 30 may be 80° to 100°.

[0088] The power supply circuit 10 can prevent the circuit breakers in the main junction box 26 and the first battery junction box 30 from simultaneously tripping, even if the aircraft 12 is subjected to an excessive shock. As a result, power can be supplied to the first load device 14 from at least one of the generator 18 and the first battery 20. Consequently, the first load device 14 can continue to operate.

[0089] In the power supply circuit 10 of the first embodiment, the angle between the direction of movement of the movable contacts 68 in each circuit breaker of the main junction box 26 and the direction of movement of the movable contacts 68 in each circuit breaker of the second battery junction box 34 is 90°. In contrast, the angle between the direction of movement of the movable contacts 68 in each circuit breaker of the main junction box 26 and the direction of movement of the movable contacts 68 in each circuit breaker of the second battery junction box 34 may be 80° to 100°.

[0090] The power supply circuit 10 can prevent the circuit breakers in the main junction box 26 and the second battery junction box 34 from simultaneously tripping, even if the aircraft 12 is subjected to an excessive shock. As a result, power can be supplied to the second load device 16 from at least one of the generator 18 and the second battery 22. Consequently, the second load device 16 can continue to operate.

[0091] [Differentiation Example 4] In the first embodiment, the power supply circuit 10 supplies power to two loads, the first load device 14 and the second load device 16. In contrast, the power supply circuit 10 may be configured to supply power to only one load. In this case, power can be supplied to the single load from multiple power sources.

[0092] Furthermore, the power supply circuit 10 may be configured to supply power to three or more loads. In this case, power should be supplied to each load from multiple power sources.

[0093] [Difference 5] In the first embodiment, circuit breakers 50a, 52a, and 54a are provided on the positive terminal line of the first power transmission line 24. Furthermore, circuit breakers 50b, 52b, and 54b are provided on the negative terminal line of the first power transmission line 24. In contrast, the circuit breaker 50b on the negative terminal line of the first power transmission line 24 may be omitted. In this case, the circuit breakers 52a and 54a on the positive terminal line of the first power transmission line 24 may also be omitted. In this case, the circuit breakers 50a on the positive terminal line of the first power transmission line 24 may also be omitted.

[0094] Furthermore, the present invention is not limited to the embodiments described above, and various configurations can be taken without departing from the spirit of the invention.

[0095] In the first embodiment, the power supply circuit 10 is mounted on the aircraft 12. However, the power supply circuit 10 is not limited to the aircraft 12, and may be mounted on various mobile bodies such as ships, automobiles, and trains.

[0096] [Invention obtained from the embodiment] The inventions that can be understood from the above embodiments are described below.

[0097] The power supply circuit (10) of the mobile unit (12) includes a first transmission line (24) that sends power from a first power source (18) to loads (14, 16), a second transmission line (28, 32) that sends power from a second power source (20, 22) to the loads, a first circuit breaker (50a) provided in the first transmission line that switches between a conductive state where electricity flows and a disconnected state where the flow of electricity is interrupted between the first power source and the loads, and a first circuit breaker (50a) provided in the second transmission line that switches between the second power source and the loads The system includes a second circuit breaker (56a, 58a) that switches between the conductive state and the interrupted state between the load and the first circuit breaker, the first circuit breaker having a first fixed contact (70) and a first movable contact (68) that moves relative to the first fixed contact, and the second circuit breaker having a second fixed contact (70) and a second movable contact (68) that moves relative to the second fixed contact, the direction of movement of the first movable contact and the direction of movement of the second movable contact intersect. As a result, even if an excessive shock is input to the moving body, power can be supplied to the load from at least one of the first power supply and the second power supply.

[0098] In the power supply circuit for the moving body described above, the angle between the direction of movement of the first movable contact and the direction of movement of the second movable contact may be 80° to 100°. This ensures that power can be supplied to the load from at least one of the first power supply and the second power supply, even if an excessive shock is applied to the moving body.

[0099] In the power supply circuit for the moving body described above, the angle between the direction of movement of the first movable contact and the direction of movement of the second movable contact may be 90°. This ensures that power can be supplied to the load from at least one of the first power supply and the second power supply, even if an excessive shock is applied to the moving body.

[0100] In the power supply circuit for the mobile body described above, a third circuit breaker (50b) is provided in the first power transmission line and switches between a conduction state and a disconnection state between the first power source and the load, and a fourth circuit breaker (56b, 58b) is provided in the second power transmission line and switches between a conduction state and a disconnection state between the second power source and the load, wherein the third circuit breaker has a third fixed contact (70) and a third movable contact (68) that moves relative to the third fixed contact, and the fourth circuit breaker has a fourth fixed contact (70) and a fourth movable contact (68) that moves relative to the fourth fixed contact, and the direction in which the first movable contact approaches the first fixed contact and the direction in which the third movable contact approaches the third fixed contact are opposite directions, and the direction in which the second movable contact approaches the second fixed contact and the direction in which the fourth movable contact approaches the fourth fixed contact are opposite directions. This makes it possible to maintain a state in which the flow of electricity between the first power source and the load is interrupted. Furthermore, it is possible to maintain a state where the flow of electricity between the second power source and the load is interrupted.

[0101] In the power supply circuit for the moving body described above, the angle between the direction in which the first movable contact approaches the first fixed contact and the direction in which the third movable contact approaches the third fixed contact may be 180°, and the angle between the direction in which the second movable contact approaches the second fixed contact and the direction in which the fourth movable contact approaches the fourth fixed contact may also be 180°. This makes it possible to maintain a state in which the flow of electricity between the first power source and the load is interrupted. It also makes it possible to maintain a state in which the flow of electricity between the second power source and the load is interrupted. [Explanation of Symbols]

[0102] 10...Power supply circuit 12...Aircraft (mobile object) 14...First load device (load) 18...Generator (first power source) 20...First battery (second power source) 24...First power transmission line 28...Second power transmission line 50a...Circuit breaker (First circuit breaker) 50b... Circuit breaker (third circuit breaker) 56a, 58a... Circuit breaker (second circuit breaker) 56b, 58b... Circuit breakers (fourth circuit breaker) 68...Movable contact (1st movable contact, 2nd movable contact, 3rd movable contact, 4th movable contact) 70...Fixed contacts (1st fixed contact, 2nd fixed contact, 3rd fixed contact, 4th fixed contact)

Claims

1. A power supply circuit for a mobile device, The first power transmission line sends power from the first power source to the load, A second power transmission line that sends power from the second power source to the load, A first circuit breaker is provided at the positive terminal of the first power transmission line and switches between a conductive state in which electricity flows and a disconnected state in which the flow of electricity is interrupted between the first power source and the load, A second circuit breaker is provided at the positive terminal of the second power transmission line and switches between the conduction state and the interrupted state between the second power source and the load, A third circuit breaker is provided at the negative terminal of the first power transmission line and switches between the conduction state and the interrupted state between the first power source and the load, A fourth circuit breaker is provided at the negative terminal of the second power transmission line and switches between the conduction state and the interrupted state between the second power source and the load, Equipped with, The first circuit breaker has a first fixed contact and a first movable contact that moves relative to the first fixed contact. The second circuit breaker has a second fixed contact and a second movable contact that moves relative to the second fixed contact. The third circuit breaker has a third fixed contact and a third movable contact that moves relative to the third fixed contact. The fourth circuit breaker has a fourth fixed contact and a fourth movable contact that moves relative to the fourth fixed contact. The direction of movement of the first movable contact and the direction of movement of the second movable contact intersect, and the direction of movement of the first movable contact and the direction of movement of the fourth movable contact intersect, The direction of movement of the third movable contact intersects with the direction of movement of the second movable contact, and the direction of movement of the third movable contact intersects with the direction of movement of the fourth movable contact, The direction in which the first movable contact approaches the first fixed contact is different from the direction in which the second movable contact approaches the second fixed contact, the direction in which the third movable contact approaches the third fixed contact, and the direction in which the fourth movable contact approaches the fourth fixed contact. The direction in which the second movable contact approaches the second fixed contact is different from the direction in which the third movable contact approaches the third fixed contact, and the direction in which the fourth movable contact approaches the fourth fixed contact. A power supply circuit for a mobile body, wherein the direction in which the third movable contact approaches the third fixed contact is different from the direction in which the fourth movable contact approaches the fourth fixed contact.

2. In the power supply circuit for a mobile body according to claim 1, A power supply circuit for a moving body, wherein the angle between the direction of movement of the first movable contact and the direction of movement of the second movable contact is 80° to 100°.

3. In the power supply circuit for a mobile body according to claim 2, A power supply circuit for a moving body, wherein the angle between the direction of movement of the first movable contact and the direction of movement of the second movable contact is 90°.

4. In the power supply circuit for a mobile body according to any one of claims 1 to 3, The direction in which the first movable contact approaches the first fixed contact and the direction in which the third movable contact approaches the third fixed contact are opposite directions. A power supply circuit for a mobile body, wherein the direction in which the second movable contact approaches the second fixed contact is opposite to the direction in which the fourth movable contact approaches the fourth fixed contact.

5. In the power supply circuit for a mobile body according to any one of claims 1 to 3, The angle between the direction in which the first movable contact approaches the first fixed contact and the direction in which the third movable contact approaches the third fixed contact is 180°, A power supply circuit for a mobile body, wherein the angle between the direction in which the second movable contact approaches the second fixed contact and the direction in which the fourth movable contact approaches the fourth fixed contact is 180°.

6. In the power supply circuit for a mobile body according to any one of claims 1 to 3, The power control unit further comprises a power control unit that converts the AC power output from the first power supply into DC power. The first power transmission line sends the DC power output from the power control unit to the load. The second power supply outputs DC power, The second power transmission line is a power supply circuit for a mobile body that sends DC power output from the second power source to the load.

7. In the power supply circuit for a mobile body according to any one of claims 1 to 3, The aforementioned power supply circuit is a power supply circuit for a mobile device mounted on an aircraft.

8. In the power supply circuit for a mobile body according to any one of claims 1 to 3, A power supply circuit for a mobile body, wherein the first circuit breaker and the third circuit breaker are arranged stacked vertically on top of each other.

9. In the power supply circuit for a mobile body according to any one of claims 1 to 3, A power supply circuit for a mobile body, wherein the second circuit breaker and the fourth circuit breaker are arranged stacked vertically on top of each other.

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