Power supply circuit for mobile devices

Abstract

To identify the location where an abnormality has occurred in a mobile power supply circuit.SOLUTION: A power supply circuit 10 of an aircraft 12 includes a first transmission line 28 that delivers power from a first main power supply 14 and a second main power supply 16, respectively, to a first load 22 and a second load 24, a first current sensor 34, a second current sensor 36, a third current sensor 42 and a fourth current sensor 44, and determines whether an abnormality has occurred on the basis of the currents detected by the first current sensor 34, the second current sensor 36, the third current sensor 42 and the fourth current sensor 44.SELECTED DRAWING: Figure 4

Description

Technical Field

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[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, which is a moving body. In this power supply circuit, a plurality of power sources and a plurality of loads are connected to a common power transmission bus. A cutoff section is provided between each power source and the power transmission bus. A cutoff section is provided between each load and the power transmission bus.

Prior Art Document

[0007] This invention makes it possible to identify the location where an abnormality has occurred in the power supply circuit of a mobile device. [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 control block diagram of the power supply circuit. [Figure 3]Figure 3 shows the flow of current in a power supply circuit. [Figure 4] Figure 4 shows the flow of current in a power supply circuit. [Figure 5] Figure 5 shows the flow of current in a power supply circuit. [Figure 6] Figure 6 shows the flow of current in a power supply circuit. [Figure 7] Figure 7 shows the flow of current in a power supply circuit. [Figure 8] Figure 8 shows the flow of current in a power supply circuit. [Figure 9] Figure 9 shows the flow of current in a power supply circuit. [Modes for carrying out the invention]

[0009] [First Embodiment] 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. The aircraft 12 has a first main power supply unit 14 and a second main power supply unit 16.

[0010] The first main power supply unit 14 has a first battery 18. The first main power supply unit 14 may have a capacitor instead of the first battery 18. The first main power supply unit 14 may have a generator instead of the first battery 18. The first main power supply unit 14 may have elements such as sensors, fuses, circuit breakers, diodes, transistors, resistors, coils, and capacitors. The first main power supply unit 14 may also have an inverter, converter, etc.

[0011] The second main power supply unit 16 has a second battery 20. The second main power supply unit 16 may have a capacitor instead of the second battery 20. The second main power supply unit 16 may have a generator instead of the second battery 20. The second main power supply unit 16 may have elements such as sensors, fuses, circuit breakers, diodes, transistors, resistors, coils, and capacitors. The second main power supply unit 16 may also have an inverter, converter, etc.

[0012] The aircraft 12 has a first load device 22 and a second load device 24. The first load device 22 is, for example, a vertical thruster that generates thrust in the vertical direction relative to the aircraft 12. The second load device 24 is, for example, a horizontal thruster that generates thrust in the horizontal direction relative to the aircraft 12. The first load device 22 and the second load device 24 are each driven by power supplied from a first main power supply unit 14 and a second main power supply unit 16.

[0013] The first load device 22 may include an inverter, converter, resistor, etc. Multiple inverters, converters, resistors, etc. may be connected in parallel in the first load device 22. The first load device 22 may have a battery or capacitor as an auxiliary power source.

[0014] The second load device 24 may include an inverter, converter, resistor, etc. Multiple inverters, converters, resistors, etc. may be connected in parallel in the second load device 24. The second load device 24 may have a battery or capacitor as an auxiliary power source.

[0015] The power supply circuit 10 has a main circuit 26. The main circuit 26 has a first transmission line 28. The first transmission line 28 supplies power from the first main power supply unit 14 and the second main power supply unit 16 to the first load device 22 and the second load device 24, respectively.

[0016] The main circuit 26 has a first cutoff section 30 and a second cutoff section 32. The first cutoff section 30 has a contact (not shown) on the positive electrode line of the main circuit 26 and a contact (not shown) on the negative electrode line of the main circuit 26. The second cutoff section 32 has a contact (not shown) on the positive electrode line of the main circuit 26 and a contact (not shown) on the negative electrode line of the main circuit 26.

[0017] The first cutoff section 30 switches between a conductive state in which electricity flows and a cutoff state in which the flow of electricity is cutoff between the first main power supply device 14 and the first power transmission line 28. The second cutoff section 32 switches between a conductive state in which electricity flows and a cutoff state in which the flow of electricity is cutoff between the second main power supply device 16 and the first power transmission line 28.

[0018] The main circuit 26 has a first current sensor 34 and a second current sensor 36. The first current sensor 34 is provided on the positive electrode line between the first cutoff section 30 and the first power transmission line 28. The first current sensor 34 detects the current between the first cutoff section 30 and the first power transmission line 28. The second current sensor 36 is provided on the positive electrode line between the second cutoff section 32 and the first power transmission line 28. The second current sensor 36 detects the current between the second cutoff section 32 and the first power transmission line 28.

[0019] The main circuit 26 has a third cutoff section 38 and a fourth cutoff section 40. The third cutoff section 38 has a contact (not shown) on the positive electrode line of the main circuit 26 and a contact (not shown) on the negative electrode line of the main circuit 26. The fourth cutoff section 40 has a contact (not shown) on the positive electrode line of the main circuit 26 and a contact (not shown) on the negative electrode line of the main circuit 26.

[0020] The third cutoff section 38 switches between a conductive state in which electricity flows and a cutoff state in which the flow of electricity is cutoff between the first load device 22 and the first power transmission line 28. The fourth cutoff section 40 switches between a conductive state in which electricity flows and a cutoff state in which the flow of electricity is cutoff between the second load device 24 and the first power transmission line 28.

[0021] The main circuit 26 includes a third current sensor 42 and a fourth current sensor 44. The third current sensor 42 is provided on the positive terminal wire between the third interruption unit 38 and the first power transmission line 28. The third current sensor 42 detects the current between the third interruption unit 38 and the first power transmission line 28. The fourth current sensor 44 is provided on the positive terminal wire between the fourth interruption unit 40 and the first power transmission line 28. The fourth current sensor 44 detects the current between the fourth interruption unit 40 and the first power transmission line 28.

[0022] The main circuit 26 may include elements such as sensors, fuses, circuit breakers, diodes, transistors, resistors, coils, and capacitors.

[0023] The power supply circuit 10 has a backup circuit 46. The backup circuit 46 has a second power transmission line 48. The second power transmission line 48 supplies power from the first main power supply unit 14 and the second main power supply unit 16 to the first load device 22 and the second load device 24, respectively.

[0024] The backup circuit 46 has a fifth interruption section 50 and a sixth interruption section 52. The fifth interruption section 50 has a contactor (not shown) on the positive terminal of the backup circuit 46 and a contactor (not shown) on the negative terminal of the backup circuit 46. The sixth interruption section 52 has a contactor (not shown) on the positive terminal of the backup circuit 46 and a contactor (not shown) on the negative terminal of the backup circuit 46.

[0025] The fifth circuit breaker 50 switches between a conductive state where electricity flows and a circuit breaker state where the flow of electricity is interrupted, between the first main power supply 14 and the second power transmission line 48. The sixth circuit breaker 52 switches between a conductive state where electricity flows and a circuit breaker state where the flow of electricity is interrupted, between the second main power supply 16 and the second power transmission line 48.

[0026] The backup circuit 46 includes a fifth current sensor 54 and a sixth current sensor 56. The fifth current sensor 54 is provided on the positive terminal wire between the fifth interruption unit 50 and the second power transmission line 48. The fifth current sensor 54 detects the current between the fifth interruption unit 50 and the second power transmission line 48. The sixth current sensor 56 is provided on the positive terminal wire between the sixth interruption unit 52 and the second power transmission line 48. The sixth current sensor 56 detects the current between the sixth interruption unit 52 and the second power transmission line 48.

[0027] The backup circuit 46 has a seventh interruption section 58 and an eighth interruption section 60. The seventh interruption section 58 has a contactor (not shown) on the positive terminal of the backup circuit 46 and a contactor (not shown) on the negative terminal of the backup circuit 46. The eighth interruption section 60 has a contactor (not shown) on the positive terminal of the backup circuit 46 and a contactor (not shown) on the negative terminal of the backup circuit 46.

[0028] The seventh interruption unit 58 switches between a conductive state where electricity flows and an interrupted state where the flow of electricity is blocked between the first load device 22 and the second power transmission line 48. The eighth interruption unit 60 switches between a conductive state where electricity flows and an interrupted state where the flow of electricity is blocked between the second load device 24 and the second power transmission line 48.

[0029] The backup circuit 46 includes a seventh current sensor 62 and an eighth current sensor 64. The seventh current sensor 62 is provided on the positive terminal wire between the seventh interruption unit 58 and the second power transmission line 48. The seventh current sensor 62 detects the current between the seventh interruption unit 58 and the second power transmission line 48. The eighth current sensor 64 is provided on the positive terminal wire between the eighth interruption unit 60 and the second power transmission line 48. The eighth current sensor 64 detects the current between the eighth interruption unit 60 and the second power transmission line 48.

[0030] The backup circuit 46 may include elements such as sensors, fuses, circuit breakers, diodes, transistors, resistors, coils, and capacitors.

[0031] Figure 2 is a control block diagram of the power supply circuit 10. The power supply circuit 10 includes a control unit 66.

[0032] The control unit 66 receives current information detected by the first current sensor 34, second current sensor 36, third current sensor 42, and fourth current sensor 44 of the main circuit 26. The control unit 66 also receives current information detected by the fifth current sensor 54, sixth current sensor 56, seventh current sensor 62, and eighth current sensor 64 of the backup circuit 46.

[0033] The control unit 66 controls the first interruption section 30, the second interruption section 32, the third interruption section 38, and the fourth interruption section 40 of the main circuit 26. This allows the control unit 66 to either conduct or interrupt each of the first interruption section 30, the second interruption section 32, the third interruption section 38, and the fourth interruption section 40 of the main circuit 26. The control unit 66 also controls the fifth interruption section 50, the sixth interruption section 52, the seventh interruption section 58, and the eighth interruption section 60 of the backup circuit 46. This allows the control unit 66 to either conduct or interrupt each of the fifth interruption section 50, the sixth interruption section 52, the seventh interruption section 58, and the eighth interruption section 60 of the backup circuit 46.

[0034] The control unit 66 is implemented by a processing circuit. The processing circuit may be composed of an integrated circuit such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field-Programmable Gate Array). Alternatively, the processing circuit may be composed of an electronic circuit including discrete devices. Furthermore, the processing circuit may be composed of a processor such as a CPU (Central Processing Unit) or a GPU (Graphics Processing Unit). In this case, the processing circuit is implemented by the processor executing a program stored in a memory unit (not shown).

[0035] [Power supply path under normal conditions] Next, the current flow in the power supply circuit 10 when the first load device 22 and the second load device 24 are driven will be described. Figure 3 is a diagram showing the current flow in the power supply circuit 10. In Figure 3, the thick arrows indicate the current flow in the power supply circuit 10.

[0036] When the first load device 22 and the second load device 24 are driven, the control unit 66 opens the first interruption unit 30, the second interruption unit 32, the third interruption unit 38, and the fourth interruption unit 40 of the main circuit 26. Furthermore, the control unit 66 opens the fifth interruption unit 50, the sixth interruption unit 52, the seventh interruption unit 58, and the eighth interruption unit 60 of the backup circuit 46.

[0037] As a result, the power output from the first main power supply unit 14 and the second main power supply unit 16 is supplied to the first load device 22 and the second load device 24 via the first transmission line 28. The first load device 22 and the second load device 24 are each driven by the power supplied from the first main power supply unit 14 and the second main power supply unit 16.

[0038] In this case, the magnitude of the current detected by the first current sensor 34, the second current sensor 36, the third current sensor 42, and the fourth current sensor 44 is less than a predetermined value. The predetermined value is a value set to determine whether an overcurrent is flowing in the power supply circuit 10. In the following case, the direction of the current detected by the first current sensor 34, the second current sensor 36, the third current sensor 42, and the fourth current sensor 44 is set to the positive direction. The direction of the current opposite to the positive direction is set to the negative direction. This case is when there is no short circuit in the power supply circuit 10, and power is supplied from the first main power supply unit 14 and the second main power supply unit 16 to the first load device 22 and the second load device 24 via the first transmission line 28.

[0039] [Power supply path in the event of circuit failure on the main power supply side] Next, we will explain the current flow in the power supply circuit 10 when a short circuit occurs between the first main power supply unit 14 and the first interruption unit 30. Figure 4 is a diagram showing the current flow in the power supply circuit 10. In Figure 4, the thick arrows indicate the current flow in the power supply circuit 10.

[0040] As shown in Figure 4, when a short circuit occurs between the first main power supply unit 14 and the first interruption unit 30, the magnitude of the current detected by the first current sensor 34 and the second current sensor 36 is greater than or equal to a predetermined value. Furthermore, the direction of the current detected by the first current sensor 34 is negative. In addition, the direction of the current detected by the second current sensor 36 is positive.

[0041] The magnitude of the current detected in the third current sensor 42 and the fourth current sensor 44 is extremely small. That is, the magnitude of the current detected in the third current sensor 42 and the fourth current sensor 44 is less than a predetermined value.

[0042] The control unit 66 determines that a short circuit has occurred between the first main power supply unit 14 and the first interruption unit 30 if all of the following conditions are met.

[0043] The conditions are as follows: The first interruption section 30, second interruption section 32, third interruption section 38, and fourth interruption section 40 of the main circuit 26 are in a conducting state. The fifth interruption section 50, sixth interruption section 52, seventh interruption section 58, and eighth interruption section 60 of the backup circuit 46 are in an interrupted state. The magnitude of the current detected by the first current sensor 34 is greater than or equal to a predetermined value, and the direction of the current is negative. The magnitude of the current detected by the second current sensor 36 is greater than or equal to a predetermined value, and the direction of the current is positive. The magnitude of the current detected by the third current sensor 42 is less than a predetermined value. The magnitude of the current detected by the fourth current sensor 44 is less than a predetermined value.

[0044] Figure 5 shows the flow of current in the power supply circuit 10. In Figure 5, the thick arrows indicate the flow of current in the power supply circuit 10.

[0045] If the control unit 66 determines that a short circuit has occurred between the first main power supply unit 14 and the first interruption unit 30, it controls the system as follows: As shown in Figure 5, the control unit 66 puts the first interruption unit 30, the second interruption unit 32, the third interruption unit 38, the fourth interruption unit 40 of the main circuit 26, and the fifth interruption unit 50 of the backup circuit 46 into an interruption state. Furthermore, the control unit 66 puts the sixth interruption unit 52, the seventh interruption unit 58, and the eighth interruption unit 60 of the backup circuit 46 into a conduction state.

[0046] Since the first main power supply unit 14 is directly connected to the short-circuit location, it is impossible to avoid an overcurrent flowing into the first main power supply unit 14. On the other hand, since the fifth interruption unit 50 is in the interrupted state, the second main power supply unit 16 is interrupted from the short-circuit location. The power output from the second main power supply unit 16 is supplied to the first load device 22 and the second load device 24 via the second transmission line 48. The first load device 22 and the second load device 24 are each driven by the power supplied from the second main power supply unit 16.

[0047] [Power supply routes in the event of failure of the first transmission line] Next, we will explain the current flow in the power supply circuit 10 when a short circuit occurs in the first power transmission line 28. Figure 6 is a diagram showing the current flow in the power supply circuit 10. In Figure 6, the thick arrows indicate the current flow in the power supply circuit 10.

[0048] As shown in Figure 6, when a short circuit occurs in the first power transmission line 28, the magnitude of the current detected by the first current sensor 34 and the second current sensor 36 is greater than or equal to a predetermined value. Furthermore, the direction of the current detected by the first current sensor 34 and the second current sensor 36 is the positive direction.

[0049] The magnitude of the current detected in the third current sensor 42 and the fourth current sensor 44 is extremely small. That is, the magnitude of the current detected in the third current sensor 42 and the fourth current sensor 44 is less than a predetermined value.

[0050] The control unit 66 determines that a short circuit has occurred in the first power transmission line 28 if all of the following conditions are met.

[0051] The conditions are as follows: The first interruption section 30, second interruption section 32, third interruption section 38, and fourth interruption section 40 of the main circuit 26 are in a conducting state. The fifth interruption section 50, sixth interruption section 52, seventh interruption section 58, and eighth interruption section 60 of the backup circuit 46 are in an interrupted state. The magnitude of the current detected by the first current sensor 34 is greater than or equal to a predetermined value, and the direction of the current is positive. The magnitude of the current detected by the second current sensor 36 is greater than or equal to a predetermined value, and the direction of the current is positive. The magnitude of the current detected by the third current sensor 42 is less than a predetermined value. The magnitude of the current detected by the fourth current sensor 44 is less than a predetermined value.

[0052] Figure 7 shows the flow of current in the power supply circuit 10. In Figure 7, the thick arrows indicate the flow of current in the power supply circuit 10.

[0053] If the control unit 66 determines that a short circuit has occurred in the first power transmission line 28, it controls the system as follows: As shown in Figure 7, the control unit 66 puts the first interruption unit 30, the second interruption unit 32, the third interruption unit 38, and the fourth interruption unit 40 of the main circuit 26 into an interruption state. Furthermore, the control unit 66 puts the fifth interruption unit 50, the sixth interruption unit 52, the seventh interruption unit 58, and the eighth interruption unit 60 of the backup circuit 46 into a conduction state.

[0054] This allows the first main power supply unit 14 and the second main power supply unit 16 to be disconnected from the short-circuit location. The power output from the first main power supply unit 14 and the second main power supply unit 16 is supplied to the first load device 22 and the second load device 24 via the second transmission line 48. The first load device 22 and the second load device 24 are each driven by the power supplied from the first main power supply unit 14 and the second main power supply unit 16.

[0055] [Power supply path in the event of circuit failure on the load device side] Next, we will explain the current flow in the power supply circuit 10 when a short circuit occurs between the first load device 22 and the third interruption unit 38. Figure 8 is a diagram showing the current flow in the power supply circuit 10. In Figure 8, the thick arrows indicate the current flow in the power supply circuit 10.

[0056] As shown in Figure 8, when a short circuit occurs between the first load device 22 and the third interruption unit 38, the magnitude of the current detected by the first current sensor 34, the second current sensor 36, and the third current sensor 42 is greater than or equal to a predetermined value. Furthermore, the direction of the current detected by the first current sensor 34, the second current sensor 36, and the third current sensor 42 is the positive direction.

[0057] The magnitude of the current detected by the fourth current sensor 44 is extremely small. That is, the magnitude of the current detected by the fourth current sensor 44 is less than a predetermined value.

[0058] The control unit 66 determines that a short circuit has occurred between the first load device 22 and the third interruption unit 38 if all of the following conditions are met.

[0059] The conditions are as follows: The first interruption section 30, second interruption section 32, third interruption section 38, and fourth interruption section 40 of the main circuit 26 are in a conducting state. The fifth interruption section 50, sixth interruption section 52, seventh interruption section 58, and eighth interruption section 60 of the backup circuit 46 are in an interrupted state. The magnitude of the current detected by the first current sensor 34 is greater than or equal to a predetermined value, and the direction of the current is positive. The magnitude of the current detected by the second current sensor 36 is greater than or equal to a predetermined value, and the direction of the current is positive. The magnitude of the current detected by the third current sensor 42 is greater than or equal to a predetermined value, and the direction of the current is positive. The magnitude of the current detected by the fourth current sensor 44 is less than a predetermined value.

[0060] Figure 9 shows the flow of current in the power supply circuit 10. In Figure 9, the thick arrows indicate the flow of current in the power supply circuit 10.

[0061] If the control unit 66 determines that a short circuit has occurred between the first load device 22 and the third interruption unit 38, it controls the system as follows: As shown in Figure 9, the control unit 66 puts the first interruption unit 30, the second interruption unit 32, the third interruption unit 38, the fourth interruption unit 40 of the main circuit 26, and the seventh interruption unit 58 of the backup circuit 46 into an interrupted state. Furthermore, the control unit 66 puts the fifth interruption unit 50, the sixth interruption unit 52, and the eighth interruption unit 60 of the backup circuit 46 into a conductive state.

[0062] When the seventh interruption unit 58 is opened, the second power transmission line 48 is connected to the short-circuit location. In this state, if the fifth interruption unit 50 and the sixth interruption unit 52 of the backup circuit 46 are opened, overcurrent flows into the first main power supply unit 14 and the second main power supply unit 16, respectively. As shown in Figure 9, by opening the seventh interruption unit 58, the first main power supply unit 14 and the second main power supply unit 16 can be disconnected from the short-circuit location.

[0063] The power output from the first main power supply unit 14 and the second main power supply unit 16 is supplied to the second load device 24 via the second power transmission line 48. The second load device 24 is driven by the power supplied from the first main power supply unit 14 and the second main power supply unit 16.

[0064] [Effects and Effects] In aircraft 12, it is preferable to avoid losing thrust during flight, even temporarily. Even if an abnormality such as a short circuit occurs in the power supply circuit 10, it is required that power continue to be supplied from at least some of the main power supply units to at least some of the load devices. To satisfy this requirement, it is necessary to control the conduction and interruption states of each interruption unit in the power supply circuit 10 according to the location of the abnormality. Therefore, it is necessary to identify the location of the abnormality in the power supply circuit 10.

[0065] In the power supply circuit 10 of this embodiment, the control unit 66 identifies the location of the abnormality based on the current detected by the first current sensor 34, the second current sensor 36, the third current sensor 42, and the fourth current sensor 44. As a result, the power supply circuit 10 of this embodiment can identify the location of the abnormality in the power supply circuit 10.

[0066] In the power supply circuit 10 of this embodiment, the control unit 66 determines that a short circuit has occurred between the first main power supply unit 14 and the first interruption unit 30 if all of the following conditions are met.

[0067] The conditions are as follows: The first, second, third, and fourth interruption units 30, 38, and 40 of the main circuit 26 are in a conductive state. The fifth, sixth, seventh, and eighth interruption units 60 of the backup circuit 46 are in an interrupted state. The magnitude of the current detected by the first current sensor 34 is greater than or equal to a predetermined value, and the direction of the current is negative. The magnitude of the current detected by the second current sensor 36 is greater than or equal to a predetermined value, and the direction of the current is positive. The magnitude of the current detected by the third current sensor 42 is less than a predetermined value. The magnitude of the current detected by the fourth current sensor 44 is less than a predetermined value. As a result, the power supply circuit 10 of this embodiment can identify the location of an abnormality in the power supply circuit 10.

[0068] In the power supply circuit 10 of this embodiment, the control unit 66 determines that a short circuit has occurred in the first power transmission line 28 if all of the following conditions are met.

[0069] The conditions are as follows: The first, second, third, and fourth interruption units 30, 38, and 40 of the main circuit 26 are in a conductive state. The fifth, sixth, seventh, and eighth interruption units 60 of the backup circuit 46 are in an interrupted state. The magnitude of the current detected by the first current sensor 34 is greater than or equal to a predetermined value, and the direction of the current is positive. The magnitude of the current detected by the second current sensor 36 is greater than or equal to a predetermined value, and the direction of the current is positive. The magnitude of the current detected by the third current sensor 42 is less than a predetermined value. The magnitude of the current detected by the fourth current sensor 44 is less than a predetermined value. As a result, the power supply circuit 10 of this embodiment can identify the location of an abnormality in the power supply circuit 10.

[0070] In the power supply circuit 10 of this embodiment, the control unit 66 determines that a short circuit has occurred between the first load device 22 and the third interruption unit 38 if all of the following conditions are met.

[0071] The conditions are as follows: The first interruption section 30, second interruption section 32, third interruption section 38, and fourth interruption section 40 of the main circuit 26 are in a conducting state. The fifth interruption section 50, sixth interruption section 52, seventh interruption section 58, and eighth interruption section 60 of the backup circuit 46 are in an interrupted state. The magnitude of the current detected by the first current sensor 34 is greater than or equal to a predetermined value, and the direction of the current is positive. The magnitude of the current detected by the second current sensor 36 is greater than or equal to a predetermined value, and the direction of the current is positive. The magnitude of the current detected by the third current sensor 42 is greater than or equal to a predetermined value, and the direction of the current is positive. The magnitude of the current detected by the fourth current sensor 44 is less than a predetermined value.

[0072] This allows the power supply circuit 10 of this embodiment to identify the location where an abnormality has occurred in the power supply circuit 10.

[0073] In the power supply circuit 10 of this embodiment, based on the determination result of the location of the abnormality, the control unit 66 sets the fifth interruption unit 50, the sixth interruption unit 52, the seventh interruption unit 58, and the eighth interruption unit 60 to either a conductive state or an interrupted state.

[0074] This allows power to be supplied from at least one of the first main power supply unit 14 and the second main power supply unit 16 to at least one of the first load device 22 and the second load device 24 via the second power transmission line 48. As a result, at least one of the first load device 22 and the second load device 24 can continue to operate.

[0075] In the power supply circuit 10 of this embodiment, if it is determined that an abnormality has occurred between the first main power supply unit 14 and the first interruption unit 30, the control unit 66 will put the first interruption unit 30, the second interruption unit 32, the third interruption unit 38, the fourth interruption unit 40, and the fifth interruption unit 50 into an interruption state. Furthermore, the control unit 66 will put the sixth interruption unit 52, the seventh interruption unit 58, and the eighth interruption unit 60 into a conductive state.

[0076] As a result, even if an abnormality occurs between the first main power supply unit 14 and the first interruption unit 30, power can be supplied from the second main power supply unit 16 to the first load device 22 and the second load device 24. Consequently, the first load device 22 and the second load device 24 can continue to operate.

[0077] In the power supply circuit 10 of this embodiment, if it is determined that an abnormality has occurred in the first power transmission line 28, the control unit 66 puts the first interruption unit 30, the second interruption unit 32, the third interruption unit 38, and the fourth interruption unit 40 into an interruption state. Furthermore, the control unit 66 puts the fifth interruption unit 50, the sixth interruption unit 52, the seventh interruption unit 58, and the eighth interruption unit 60 into a conduction state.

[0078] As a result, even if an abnormality occurs in the first power transmission line 28, power can be supplied from the first main power supply unit 14 and the second main power supply unit 16 to the first load device 22 and the second load device 24, respectively. Consequently, the first load device 22 and the second load device 24 can continue to operate.

[0079] In the power supply circuit 10 of this embodiment, if it is determined that an abnormality has occurred between the first load device 22 and the third interruption unit 38, the control unit 66 will turn off the first interruption unit 30, the second interruption unit 32, the third interruption unit 38, the fourth interruption unit 40, and the seventh interruption unit 58. Furthermore, it will turn on the fifth interruption unit 50, the sixth interruption unit 52, and the eighth interruption unit 60.

[0080] As a result, even if an abnormality occurs between the first load device 22 and the third circuit breaker 38, power can be supplied to the second load device 24 from both the first main power supply 14 and the second main power supply 16. Consequently, the second load device 24 can continue to operate.

[0081] 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.

[0082] 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.

[0083] In the first embodiment, the power supply circuit 10 supplies power to two load devices, a first load device 22 and a second load device 24, from two main power supplies, a first main power supply device 14 and a second main power supply device 16. Alternatively, the power supply circuit 10 may supply power to three or more load devices from three or more main power supplies. The number of main power supplies and the number of load devices may be different.

[0084] Furthermore, the first main power supply unit 14 may have a plurality of first batteries 18. The second main power supply unit 16 may have a plurality of second batteries 20. Also, each of the first load device 22 and the second load device 24 may consist of a plurality of load devices.

[0085] [Invention obtained from the embodiment] The inventions that can be understood from the above embodiments are described below.

[0086] A power supply circuit (10) of a mobile body (12), the power supply circuit includes a first transmission line (28) that sends power from one first power source (14) and one or more second power sources (16) to one first load (22) and one or more second loads (24), a first interruption unit (30) between the first power source and the first transmission line that switches between a conduction state in which electricity flows and an interruption state in which the flow of electricity is interrupted, one or more second interruption units (32) between each of the second power sources and the first transmission line that switches between the conduction state and the interruption state, a third interruption unit (38) between the first load and the first transmission line that switches between the conduction state and the interruption state, one or more fourth interruption units (40) between each of the second load and the first transmission line that switches between the conduction state and the interruption state, and the first interruption unit and the first transmission line The power supply circuit includes a first current sensor (34) for detecting the current between the first and second circuit breakers, one or more second current sensors (36) for detecting the current between each of the second circuit breakers and the first power transmission line, a third current sensor (42) for detecting the current between the third circuit breaker and the first power transmission line, and one or more fourth current sensors (44) for detecting the current between each of the fourth circuit breakers and the first power transmission line. When the first circuit breaker, one or more second circuit breakers, the third circuit breaker, and one or more fourth circuit breakers are in the conductive state, the power supply circuit determines whether an abnormality has occurred in the first power transmission line, between the first power supply and the first circuit breaker, and between the first load and the third circuit breaker, based on the currents detected by each of the first current sensors, one or more second current sensors, the third current sensor, and one or more fourth current sensors. This allows the power supply circuit to identify the location of the abnormality in the power supply circuit.

[0087] In the power supply circuit of the mobile body described above, if the magnitude of the current detected by the first current sensor is greater than or equal to a predetermined value and the direction of the current is not in the predetermined direction, and the magnitude of the current detected by each of the second current sensors is greater than or equal to the predetermined value and the direction of the current is in the predetermined direction, and the magnitude of the current detected by the third current sensor is less than the predetermined value, and the magnitude of the current detected by each of the fourth current sensors is less than the predetermined value, then it may be determined that an abnormality has occurred between the first power supply and the first interruption unit. This allows the power supply circuit to identify the location of the abnormality in the power supply circuit.

[0088] In the power supply circuit of the mobile body described above, if the magnitude of the current detected by the first current sensor is greater than or equal to a predetermined value and the direction of the current is in a predetermined direction, and the magnitude of the current detected by each of the second current sensors is greater than or equal to the predetermined value and the direction of the current is in the predetermined direction, and the magnitude of the current detected by the third current sensor is less than the predetermined value, and the magnitude of the current detected by each of the fourth current sensors is less than the predetermined value, then it may be determined that an abnormality has occurred in the first power transmission line. This allows the power supply circuit to identify the location of the abnormality in the power supply circuit.

[0089] In the power supply circuit for the mobile body described above, if the magnitude of the current detected by the first current sensor is greater than or equal to a predetermined value and the direction of the current is in a predetermined direction, and the magnitude of the current detected by each of the second current sensors is greater than or equal to the predetermined value and the direction of the current is in a predetermined direction, and the magnitude of the current detected by the third current sensor is greater than or equal to the predetermined value and the direction of the current is in a predetermined direction, and the magnitude of the current detected by each of the fourth current sensors is less than the predetermined value, then it may be determined that an abnormality has occurred between the first load and the third interruption unit. This allows the power supply circuit to identify the location of the abnormality in the power supply circuit.

[0090] In the power supply circuit of the mobile body described above, a second transmission circuit (48) is provided in parallel with the first transmission circuit and sends power from one first power source and one or more second power sources to one first load and one or more second loads; a fifth interruption unit (50) is provided between the first power source and the second transmission circuit to switch between a conduction state and an interruption state; one or more sixth interruption units (52) are provided between each of the second power sources and the second transmission circuit to switch between a conduction state and an interruption state; and between the first load and the second transmission circuit The system includes a seventh interruption unit (58) that switches between a conduction state and an interruption state, and one or more eighth interruption units (60) that switch between a conduction state and an interruption state between each of the second loads and the second power transmission line. Based on the results of the determinations for the first power transmission line, the space between the first power source and the first interruption unit, and the space between the first load and the third interruption unit, the fifth interruption unit, one or more sixth interruption units, the seventh interruption unit, and one or more eighth interruption units may be set to the conduction state or the interruption state. This allows power to be supplied from the first main power supply unit and at least one of one or more second main power supply units to the first load unit and at least one of one or more second load units via the second power transmission line. As a result, the first load unit and at least one of one or more second load units can continue to operate.

[0091] In the power supply circuit of the mobile body described above, if it is determined that an abnormality has occurred between the first power supply and the first interruption unit, the first interruption unit, one or more second interruption units, the third interruption unit, one or more fourth interruption units, and the fifth interruption unit may be set to the interrupted state, while one or more sixth interruption units, the seventh interruption unit, and one or more eighth interruption units may be set to the conductive state. This allows power to be supplied from one or more second main power supplies to the first load device and one or more second load devices even if an abnormality occurs between the first main power supply and the first interruption unit. As a result, the first load device and one or more second load devices can continue to operate.

[0092] In the power supply circuit for the mobile device described above, if it is determined that an abnormality has occurred in the first power transmission line, the first interruption unit, one or more second interruption units, the third interruption unit, and one or more fourth interruption units may be set to the interrupted state, while the fifth interruption unit, one or more sixth interruption units, the seventh interruption unit, and one or more eighth interruption units may be set to the conductive state. This allows power to be supplied from the first main power supply unit and one or more second main power supply units to the first load device and one or more second load devices, even if an abnormality occurs in the first power transmission line. As a result, the first load device and one or more second load devices can continue to operate.

[0093] In the power supply circuit for the mobile device described above, if it is determined that an abnormality has occurred between the first load and the third interruption unit, the first interruption unit, one or more second interruption units, the third interruption unit, one or more fourth interruption units, and the seventh interruption unit may be set to the interrupted state, while the fifth interruption unit, one or more sixth interruption units, and one or more eighth interruption units may be set to the conductive state. This allows power to be supplied to the second load device from the first main power supply unit and one or more second main power supply units, even if an abnormality occurs between the first load device and the third interruption unit. As a result, the second load device can continue to operate. [Explanation of Symbols]

[0094] 10...Power supply circuit 12...Aircraft (mobile object) 14…1st main power supply device (1st power supply) 16…2nd main power supply device (2nd power supply) 22...First load device (first load) 24...Second load device (second load) 28...First transmission line 30...First circuit breaker 32...Second shutoff section 38...Third shutoff section 40...Fourth circuit breaker 48...Second power transmission line 50...5th shutoff section 52...6th shutoff section 58...7th shutoff section 60...8th shutoff section

Claims

1. A power supply circuit for a mobile device, A first transmission line that sends power from one first power source and one or more second power sources to one first load and one or more second loads, Between the first power source and the first power transmission line, a first interruption unit switches between a conductive state in which electricity flows and an interruption state in which the flow of electricity is interrupted, Between each of the aforementioned second power sources and the first power transmission line, there is one or more second interruption units that switch between the conduction state and the interruption state, Between the first load and the first power transmission line, a third circuit breaker switches between the conduction state and the circuit breaker state, Between each of the aforementioned second loads and the first power transmission line, there is one or more fourth interruption units that switch between the conduction state and the interruption state, A first current sensor for detecting the current between the first interruption unit and the first power transmission line, One or more second current sensors for detecting the current between each of the second interruption units and the first power transmission line, A third current sensor for detecting the current between the third interruption unit and the first power transmission line, One or more fourth current sensors for detecting the current between each of the fourth interruption units and the first power transmission line, A second transmission line is provided in parallel with the first transmission line and transmits power from one of the first power sources and one or more of the second power sources to one of the first loads and one or more of the second loads, Between the first power supply and the second power transmission line, a fifth interruption unit is provided for switching between the conduction state and the interruption state, Between each of the aforementioned second power sources and the second power transmission line, there is one or more sixth interruption units that switch between the conduction state and the interruption state, Between the first load and the second power transmission line, a seventh interruption unit is provided for switching between the conduction state and the interruption state, Between each of the aforementioned second loads and the second power transmission line, there is one or more eighth interruption units that switch between the conduction state and the interruption state, Equipped with, When the first interruption unit, one or more second interruption units, the third interruption unit, and one or more fourth interruption units are in the conductive state, a determination is made as to whether or not an abnormality has occurred in the first power transmission line, between the first power supply and the first interruption unit, and between the first load and the third interruption unit, based on the current detected by each of the first current sensor, one or more second current sensors, the third current sensor, and one or more fourth current sensors. A power supply circuit for a mobile body, which, based on the results of the determinations for the first power transmission line, the space between the first power source and the first interruption unit, and the space between the first load and the third interruption unit, sets the fifth interruption unit, one or more sixth interruption units, the seventh interruption unit, and one or more eighth interruption units to the conductive state or the interruption state.

2. In the power supply circuit for a mobile body according to claim 1, If the magnitude of the current detected by the first current sensor is greater than or equal to a predetermined value, and the direction of the current is not in the predetermined direction, When the magnitude of the current detected by each of the second current sensors is greater than or equal to the predetermined value, and the direction of the current is the predetermined direction, When the magnitude of the current detected by the third current sensor is less than the predetermined value, If the magnitude of the current detected by each of the fourth current sensors is less than the predetermined value, A power supply circuit for a mobile body that determines that an abnormality has occurred between the first power supply and the first interruption unit.

3. In the power supply circuit for a mobile body according to claim 1 or 2, When the magnitude of the current detected by the first current sensor is greater than or equal to a predetermined value, and the direction of the current is in a predetermined direction, When the magnitude of the current detected by each of the second current sensors is greater than or equal to the predetermined value, and the direction of the current is the predetermined direction, When the magnitude of the current detected by the third current sensor is less than the predetermined value, If the magnitude of the current detected by each of the fourth current sensors is less than the predetermined value, A power supply circuit for a mobile device that determines that an abnormality has occurred in the first power transmission line.

4. In the power supply circuit for a mobile body according to claim 1 or 2, When the magnitude of the current detected by the first current sensor is greater than or equal to a predetermined value, and the direction of the current is in a predetermined direction, When the magnitude of the current detected by each of the second current sensors is greater than or equal to the predetermined value, and the direction of the current is the predetermined direction, When the magnitude of the current detected by the third current sensor is greater than or equal to the predetermined value, and the direction of the current is the predetermined direction, If the magnitude of the current detected by each of the fourth current sensors is less than the predetermined value, A power supply circuit for a mobile body that determines that an abnormality has occurred between the first load and the third interruption unit.

5. In the power supply circuit for a mobile body according to claim 1, A power supply circuit for a mobile body, which, when it is determined that an abnormality has occurred between the first power supply and the first interruption unit, puts the first interruption unit, one or more second interruption units, the third interruption unit, one or more fourth interruption units, and the fifth interruption unit into the interruption state, and puts one or more sixth interruption units, the seventh interruption unit, and one or more eighth interruption units into the conduction state.

6. In the power supply circuit for a mobile body according to claim 1, A power supply circuit for a mobile body, which, when it is determined that an abnormality has occurred in the first power transmission line, puts the first interruption unit, one or more second interruption units, the third interruption unit, and one or more fourth interruption units into the interruption state, and puts the fifth interruption unit, one or more sixth interruption units, the seventh interruption unit, and one or more eighth interruption units into the conduction state.

7. In the power supply circuit for a mobile body according to claim 1, A power supply circuit for a mobile body, which, when it is determined that an abnormality has occurred between the first load and the third interruption unit, puts the first interruption unit, one or more second interruption units, the third interruption unit, one or more fourth interruption units, and the seventh interruption unit into the interruption state, and puts the fifth interruption unit, one or more sixth interruption units, and one or more eighth interruption units into the conduction state.

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