Inverter controller

Abstract

To provide an improved inverter controller.SOLUTION: An inverter controller 10 comprises: a signal output unit 58 that outputs a processing signal for cutting off power supply by a second power supply 16; and a writing processing unit 60 for writing, to a nonvolatile memory 64, power stoppage information indicating that power supply from a first power supply has stopped when a determination unit determines that a driving state of a vehicle is not abnormal, and a power monitoring unit 54 detects that power supply from the first power supply has stopped. The signal output unit outputs the processing signal after the writing of the power stoppage information to the nonvolatile memory has been completed by the writing processing unit.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to an inverter control device. [Background technology]

[0002] Patent Document 1 discloses a vehicle equipped with a lead battery (first power source), a lithium ion battery (second power source), and an ISG controller (inverter control device). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-5433 Summary of the Invention [Problem to be solved by the invention]

[0004] A better inverter controller is needed.

[0005] The present disclosure aims to solve the above-mentioned problems. [Means for solving the problem]

[0006] An aspect of the present disclosure is an inverter control device that includes a signal output unit that outputs a processing signal to cut off the power supply from the second power source when the determination unit determines that the vehicle's operating condition is abnormal, and a write processing unit that writes power interruption information indicating that the power supply from the first power source has been interrupted into a non-volatile memory when the determination unit determines that the vehicle's operating condition is not abnormal and the power monitoring unit detects that the power supply from the first power source has been interrupted, and the signal output unit outputs the processing signal after the writing processing unit has completed writing the power interruption information into the non-volatile memory. [Effects of the Invention]

[0007] According to the present disclosure, a better inverter control device can be provided. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic diagram of a vehicle equipped with an inverter control device according to an embodiment. [Figure 2] FIG. 2 is a circuit diagram including a second power supply and an inverter. [Figure 3] FIG. 3 is a flowchart illustrating an example of the operation of the inverter control device. DETAILED DESCRIPTION OF THE INVENTION

[0009] The inverter control device can operate, for example, using power supplied from a first power source, and can also operate using power supplied from a second power source when the power supply from the first power source is interrupted. When the vehicle's operating condition is normal and the power supply from the first power source is interrupted, the power supply from the second power source is cut off. If the power supply from the second power source is cut off while the power supply from the first power source is interrupted, the inverter control device cannot write power interruption information indicating that the power supply from the first power source has been interrupted to a non-volatile memory. In this case, there is a risk that the faulty part, etc., cannot be identified by analyzing the power interruption information. The present disclosure can provide an inverter control device that can store power interruption information in a non-volatile memory when the vehicle's operating condition is normal and the power supply from the first power source is interrupted.

[0010] Fig. 1 is a schematic diagram of a vehicle 12 equipped with an inverter control device 10 according to an embodiment. As shown in Fig. 1, the inverter control device 10 is provided in the vehicle 12. The vehicle 12 includes a first power source 14, a second power source 16, and the inverter control device 10.

[0011] The first power supply 14 supplies power to the inverter control device 10. The voltage supplied from the first power supply 14 is, for example, 12 V, but is not limited to this. The first power supply 14 is, for example, a lead-acid battery. Note that the first power supply 14 may be a storage battery other than a lead-acid battery.

[0012] The second power supply 16 supplies power to the inverter control device 10. The voltage supplied from the second power supply 16 is, for example, 400 V, but is not limited to this. The voltage supplied from the second power supply 16 is higher than the voltage supplied from the first power supply 14. The second power supply 16 is, for example, a lithium-ion battery. Note that the second power supply 16 may also be a storage battery other than a lithium-ion battery.

[0013] The inverter control device 10 includes a first power supply circuit 18, a second power supply circuit 20, an inverter 22, a calculation unit 24, and a storage unit .

[0014] The first power supply circuit 18 may include, for example, various sensors, fuses, relays, breakers, diodes, transistors, resistors, coils, capacitors, etc., but a description thereof will be omitted here. The power supplied from the first power supply 14 is supplied to the calculation unit 24 (one or more processors 50) etc. via the first power supply circuit 18.

[0015] 2 is a circuit diagram including a second power source 16 and an inverter 22. As shown in FIG. 2, the second power source 16 is electrically connected to a positive electrode wiring 28 and a negative electrode wiring 30. The positive electrode wiring 28 electrically connects the positive electrode terminal of the second power source 16 to the inverter 22. The negative electrode wiring 30 electrically connects the negative electrode terminal of the second power source 16 to the inverter 22.

[0016] One input terminal (+ input terminal) of the second power supply circuit 20 is connected to the positive terminal of the second power supply 16 via a positive wiring 28. The other input terminal (- input terminal) of the second power supply circuit 20 is connected to the negative terminal of the second power supply 16 via a negative wiring 30. The second power supply circuit 20 includes a DC / DC converter that steps down the voltage supplied from the second power supply 16. The second power supply circuit 20 may be provided with components other than those described above (for example, various sensors, fuses, relays, breakers, diodes, transistors, resistors, coils, capacitors, etc.), but description thereof will be omitted here. The power supplied from the second power supply 16 may be supplied to a calculation unit 24 (one or more processors 50) etc. via the second power supply circuit 20.

[0017] The voltage supplied from the second power supply 16 via the second power supply circuit 20 is lower than the voltage supplied from the first power supply 14 via the first power supply circuit 18. Specifically, the voltage supplied from the first power supply 14 via the first power supply circuit 18 to the calculation unit 24 is, for example, 12 V. The voltage supplied from the second power supply 16 via the second power supply circuit 20 to the calculation unit 24 is, for example, 10 V. Because the output voltage of the first power supply 14 is higher than the output voltage of the second power supply 16, under normal circumstances, the power supplied from the first power supply 14 may be consumed by the calculation unit 24, etc.

[0018] An interruption circuit 32 is provided in a portion of the positive wiring 28 between the second power source 16 and the second power supply circuit 20. As shown in FIGS. 1 and 2 , the interruption circuit 32 can interrupt the supply of power from the second power source 16 to the second power supply circuit 20. The interruption circuit 32 is, for example, a relay that interrupts the supply of power from the second power source 16 to the second power supply circuit 20 based on receipt of an interruption signal output from a battery management system 34. The interruption circuit 32 may also be provided in a portion of the negative wiring 30 between the second power source 16 and the second power supply circuit 20.

[0019] 2, the inverter 22 converts DC power supplied from the second power supply 16 into AC power and supplies the AC power to the motor 48. The inverter 22 is, for example, a voltage-type inverter. The inverter 22 includes a capacitor 36 and an inverter unit 38.

[0020] The capacitor 36 is a smoothing capacitor. That is, the capacitor 36 keeps the output voltage from the second power supply 16 constant. The capacitor 36 is electrically connected to the positive electrode wiring 28 and the negative electrode wiring 30. The capacitor 36 can be charged by the power supplied from the second power supply 16.

[0021] The inverter unit 38 includes three upper arms 40, three lower arms 42, three first switching elements 44, and three second switching elements 46. The three upper arms 40 correspond to the U-phase, V-phase, and W-phase of the motor 48, respectively. The three upper arms 40 are electrically connected to the positive wiring 28. Each upper arm 40 performs a switching operation (on / off operation) via a first switching element 44. The three lower arms 42 correspond to the U-phase, V-phase, and W-phase of the motor 48, respectively. The three lower arms 42 are electrically connected to the negative wiring 30. Each lower arm 42 performs a switching operation (on / off operation) via a second switching element 46.

[0022] 1, the calculation unit 24 is configured with a processor 50 such as a CPU (Central Processing Unit) or a GPU (Graphics Processing Unit). That is, the calculation unit 24 is configured with processing circuitry. The calculation unit 24 may be provided with one or more processors 50.

[0023] The calculation unit 24 includes an inverter control unit 52 , a power monitoring unit 54 , a determination unit 56 , a signal output unit 58 , a write processing unit 60 , and a notification unit 62 .

[0024] The inverter control unit 52, the power monitoring unit 54, the determination unit 56, the signal output unit 58, the write processing unit 60, and the notification unit 62 can be realized by the calculation unit 24 executing a program stored in the storage unit 26. Note that at least a portion of the inverter control unit 52, the power monitoring unit 54, the determination unit 56, the signal output unit 58, the write processing unit 60, and the notification unit 62 may be realized by an integrated circuit such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field-Programmable Gate Array). Also, at least a portion of the inverter control unit 52, the power monitoring unit 54, the determination unit 56, the signal output unit 58, the write processing unit 60, and the notification unit 62 may be configured by an electronic circuit including discrete devices.

[0025] The storage unit 26 is composed of a volatile memory (not shown) and a non-volatile memory 64. An example of the volatile memory is a random access memory (RAM). The volatile memory is used as a working memory for the processor 50, and temporarily stores data necessary for processing or calculations. An example of the non-volatile memory 64 is a read-only memory (ROM) or a flash memory. The non-volatile memory 64 is used as a storage memory, and stores programs, tables, maps, etc. At least a part of the storage unit 26 may be provided in the processor 50, an integrated circuit, etc., as described above.

[0026] The inverter control unit 52 controls the inverter 22. In other words, the inverter control unit 52 drives the motor 48 by controlling the inverter 22. The motor 48 drives the vehicle 12. The power monitoring unit 54 monitors the state of power supply from the first power source 14. The determination unit 56 determines whether the operating state of the vehicle 12 is abnormal based on a signal indicating the operating state of the vehicle 12. The signal output unit 58 outputs a processing signal for cutting off the power supply from the second power source 16 when the determination unit 56 determines that the operating state of the vehicle 12 is abnormal. The write processing unit 60 writes power interruption information indicating that the supply of power from the first power source 14 has been interrupted to the non-volatile memory 64. The notification unit 62 issues warning information to notify the user that the supply of power from the first power source 14 has been interrupted. In other words, the notification unit 62 outputs the warning information to a warning light 66, causing the warning light 66 to light up or flash. The warning light 66 may be provided, for example, on an instrument panel (not shown) of the vehicle 12 .

[0027] A signal indicating the vehicle state is input to the inverter control device 10. The signal indicating the vehicle state includes a first signal and a second signal. The first signal is a CAN (Control Area Network) signal. The first signal is an alternating signal. The second signal is a signal related to a collision of the vehicle 12. The second signal is an alternating signal.

[0028] The battery management system 34 constantly outputs a second signal to the inverter control device 10 while the vehicle 12 is in operation. The battery management system 34 stops outputting the second signal when, for example, it receives a collision signal output from another controller (not shown). The battery management system 34 outputs a shutdown signal to the shutdown circuit 32 based on receipt of the processed signal output from the signal output unit 58.

[0029] Fig. 3 is a flowchart for explaining an example of the operation of the inverter control device 10. The flowchart in Fig. 3 is executed at a predetermined cycle while the vehicle 12 is in operation.

[0030] In step S1, the determination unit 56 determines whether the operating state of the vehicle 12 is abnormal. Specifically, the determination unit 56 determines whether the operating state of the vehicle 12 is abnormal based on a signal indicating the operating state of the vehicle 12. More specifically, the determination unit 56 determines that the operating state of the vehicle 12 is abnormal when both the first signal and the second signal indicate an abnormality. In other words, the determination unit 56 determines that the operating state of the vehicle 12 is abnormal when both the input of the first signal and the second signal to the inverter control device 10 are cut off. That is, the determination unit 56 determines that the operating state of the vehicle 12 is not abnormal when, for example, only one of the first signal and the second signal indicates an abnormality.

[0031] If the first signal, which is a CAN signal, indicates an abnormality, the inverter control device 10 is disconnected from the in-vehicle network. This may cause the inverter control unit 52 to be unable to appropriately control the inverter 22 based on vehicle-related information (e.g., vehicle speed, steering angle, etc.) output from another controller (not shown). If the second signal, which is a signal related to a collision of the vehicle 12, indicates an abnormality, the inverter control unit 52 may be unable to appropriately control the inverter 22 due to the effects of the vehicle collision.

[0032] Step S1 is not limited to the above-described process. In step S1, the determination unit 56 may determine that the driving state of the vehicle 12 is abnormal if either the first signal or the second signal indicates an abnormality.

[0033] If the determination unit 56 determines that the driving state of the vehicle 12 is abnormal (YES in step S1), the process proceeds to step S6. If the determination unit 56 determines that the driving state of the vehicle 12 is not abnormal (NO in step S1), the process proceeds to step S2.

[0034] In step S2, the determination unit 56 determines whether the power monitoring unit 54 has detected that the supply of power from the first power source 14 has been interrupted. If the determination unit 56 determines that the power monitoring unit 54 has not detected that the supply of power from the first power source 14 has been interrupted (NO in step S2), the process shown in Fig. 3 is completed. If the determination unit 56 determines that the power monitoring unit 54 has detected that the supply of power from the first power source 14 has been interrupted (YES in step S2), the process proceeds to step S3.

[0035] In step S3, the notification unit 62 notifies the user of warning information. Specifically, the notification unit 62 outputs the warning information to the warning light 66. The warning light 66 lights up or flashes based on the reception of the warning information. This allows the user to know that the supply of power from the first power source 14 has been cut off. The notification unit 62 may output the warning information from a speaker (not shown), for example. The notification unit 62 may also display the warning information on a display unit of a car navigation system, for example. Furthermore, the notification unit 62 may output the warning information to the user's terminal (such as a mobile phone). After this, the process proceeds to step S4.

[0036] In step S4, the write processing unit 60 writes power interruption information indicating that the supply of power from the first power supply 14 has been interrupted to the nonvolatile memory 64. After that, the process proceeds to step S5.

[0037] In step S5, the determination unit 56 determines whether or not writing of the power interruption information to the nonvolatile memory 64 is complete. The process of step S5 is repeated until writing of the power interruption information to the nonvolatile memory 64 is complete. If the determination unit 56 determines that writing of the power interruption information to the nonvolatile memory 64 is complete (YES in step S5), the process proceeds to step S6.

[0038] In step S6, the signal output unit 58 outputs a processing signal for cutting off the power supply from the second power source 16. The processing signal is input to the battery management system 34. The battery management system 34 outputs a cutoff signal to the cutoff circuit 32 based on receipt of the processing signal. The cutoff circuit 32 cuts off the positive electrode wiring 28 based on receipt of the cutoff signal. This cuts off the power supply from the second power source 16 to the inverter 22 and the second power source circuit 20. After this, the process proceeds to step S7.

[0039] In step S7, the inverter control unit 52 performs a discharge process to control the inverter 22 to release the charge stored in the capacitor 36. The inverter control unit 52 is driven by the power stored in the capacitor 36. After this, the process shown in FIG. 3 is completed.

[0040] The operation of the inverter control device 10 is not limited to the above. For example, the notification of the warning information may be performed simultaneously with the process of writing the power interruption information to the nonvolatile memory 64. Alternatively, the notification of the warning information may be performed after the writing of the power interruption information to the nonvolatile memory 64 is completed.

[0041] The inverter control device 10 may include the shutoff circuit 32 as a component. The inverter control device 10 may not include at least one of the first power supply circuit 18, the second power supply circuit 20, and the inverter 22 as a component.

[0042] According to this embodiment, when the determination unit 56 determines that the operating state of the vehicle 12 is not abnormal and the power monitoring unit 54 detects that the supply of power from the first power source 14 has been interrupted, power interruption information is written to the nonvolatile memory 64. In other words, the power interruption information can be saved in the nonvolatile memory 64 before the supply of power from the second power source 16 is cut off. This makes it possible to identify the location of a failure, for example, by analyzing the power interruption information written to the nonvolatile memory 64. Therefore, a better inverter control device 10 can be provided.

[0043] The following additional notes are further disclosed regarding the above embodiment.

[0044] (Appendix 1) The inverter control device (10) of the present disclosure is an inverter control device provided in a vehicle (12) equipped with a first power source (14) and a second power source (16), the inverter control device being operable by power supplied from the first power source and, when the supply of power from the first power source is interrupted, by power supplied from the second power source, the inverter control device being operable by power supplied from the second power source, the inverter control device including an inverter control unit (52) that controls an inverter (22) that drives a motor (48) equipped in the vehicle by power supplied from the second power source, a power monitoring unit (54) that monitors the supply state of power from the first power source, and a power monitoring unit (55) that monitors the supply state of power from the first power source and a power monitoring unit (56) that monitors the supply state of power from the first power source and a power monitoring unit (57) that monitors the supply state of power from the first power source and a power monitoring unit (58) that monitors the supply state of power from the first power source and a power monitoring unit (59) that monitors the supply state of power from the first power source and a power monitoring unit (60) that monitors the supply state of power from the first power source and a power monitoring unit (61) that monitors the supply state of power from the first power source and a power monitoring unit (62) that monitors the supply state of power from the first power source and a power monitoring unit (63) that monitors the supply state of power from the first power source and a power monitoring unit (64) that monitors the supply state of power from the first power source and a power monitoring unit (64) that monitors the supply state of power from the first power source and a power monitoring unit (61) that monitors the supply state of power from the first power source and a power monitoring unit (62) that monitors the supply state of power from the first power source and a power monitoring unit (63) that monitors the supply state of power from the first power source and a power monitoring unit (64) that monitors the supply state of power from the first power source and a power monitoring unit (61) that monitors the supply state of power The vehicle driving control system includes a determination unit (56) that makes a determination based on a signal indicating the driving state, a signal output unit (58) that outputs a processing signal to cut off the power supply from the second power source when the determination unit determines that the driving state of the vehicle is abnormal, and a write processing unit (60) that writes power interruption information indicating that the power supply from the first power source has been interrupted into a non-volatile memory (64) when the determination unit determines that the driving state of the vehicle is not abnormal and the power monitoring unit detects that the power supply from the first power source has been interrupted, and the signal output unit outputs the processing signal after the writing processing unit has completed writing the power interruption information into the non-volatile memory.

[0045] With this configuration, when the determination unit determines that the vehicle's operating condition is not abnormal and the power monitoring unit detects that the supply of power from the first power source has been interrupted, the power interruption information is written to the nonvolatile memory. In other words, the power interruption information can be saved in the nonvolatile memory before the supply of power from the second power source 16 is interrupted. This makes it possible to identify the faulty part, for example, by analyzing the power interruption information written in the nonvolatile memory. Therefore, a better inverter control device can be provided.

[0046] (Appendix 2) The inverter control device described in Appendix 1 may further include a notification unit (62) that, when the power monitoring unit detects that the supply of power from the first power source has been interrupted, issues warning information to notify a user that the supply of power from the first power source has been interrupted.

[0047] According to this configuration, the warning information can notify the user that the power supply from the first power source has been cut off (that is, the driving of the inverter cannot be controlled), thereby urging the user to take appropriate action.

[0048] (Appendix 3) In the inverter control device according to Supplementary Note 2, the notification unit may notify the warning information before the signal output unit outputs the processed signal.

[0049] With this configuration, the user can be notified of the warning information at an early stage.

[0050] (Appendix 4) In the inverter control device according to any one of Supplementary Notes 1 to 3, the inverter may include a capacitor (36) that can be charged by power supplied from the second power source, and when the signal output unit outputs the processing signal, the inverter control unit may control the inverter to perform a discharge process to release the charge stored in the capacitor.

[0051] According to this configuration, the electric charge stored in the capacitor is released by the discharge process, thereby ensuring the safety of the vehicle recovery work.

[0052] (Appendix 5) In the inverter control device described in any one of Supplementary Notes 1 to 4, the signal indicating the operating state of the vehicle may include a first signal and a second signal, and the determination unit may determine that the operating state of the vehicle is abnormal when both the first signal and the second signal indicate an abnormality.

[0053] With this configuration, when both the first signal and the second signal indicate an abnormality and there is a high possibility that the vehicle is operating in an abnormal state, it is possible to appropriately cut off the power supply from the second power source.

[0054] (Appendix 6) In the inverter control device according to Supplementary Note 5, the first signal may be a CAN (Control Area Network) signal.

[0055] With this configuration, when the first signal, which is a CAN signal, indicates an abnormality, it may become impossible to appropriately control the inverter based on vehicle-related information output from another controller, etc. In such a situation, the safety of the vehicle can be improved by cutting off the power supply from the second power source.

[0056] (Appendix 7) In the inverter control device according to Supplementary Note 5 or 6, the second signal may be a signal related to a collision of the vehicle.

[0057] With this configuration, when the second signal indicating a vehicle collision indicates an abnormality, the inverter may not be able to be controlled properly due to the effects of the vehicle collision. In such a situation, the safety of the vehicle can be improved by cutting off the power supply from the second power source.

[0058] (Appendix 8) In the inverter control device according to any one of Supplementary Notes 1 to 7, the inverter control unit, the power monitoring unit, the determination unit, the signal output unit, and the write processing unit may be configured by one or more processors (50), the power supplied from the first power source may be supplied to the one or more processors via a first power supply circuit (18), the power supplied from the second power source may be supplied to the one or more processors via a second power supply circuit (20), and a voltage supplied from the second power source via the second power supply circuit may be lower than a voltage supplied from the first power source via the first power supply circuit.

[0059] With this configuration, when power is being supplied from the first power source, one or more processors can be driven by the power supplied from the first power source via the first power supply circuit, and when the power supply from the first power source is cut off, one or more processors can be driven by the power supplied from the second power source via the second power supply circuit.

[0060] (Appendix 9) In the inverter control device according to any one of Supplementary Notes 1 to 8, when the processed signal is output from the signal output unit, a cutoff circuit (32) may cut off power supply from the second power supply.

[0061] According to this configuration, the power supply from the second power source can be reliably cut off by the cutoff circuit.

[0062] Although the present disclosure has been described in detail, the present disclosure is not limited to the individual embodiments described above. Various additions, substitutions, modifications, partial deletions, etc. are possible in these embodiments without departing from the gist of the present disclosure or the spirit of the present disclosure derived from the content of the claims and their equivalents. These embodiments can also be implemented in combination. For example, in the above-described embodiments, the order of each operation and the order of each process are shown as examples and are not limited to these. The same applies when numerical values ​​or mathematical expressions are used in the description of the above-described embodiments. [Explanation of symbols]

[0063] REFERENCE SIGNS LIST 10... inverter control device 12... vehicle 14... first power supply 16... second power supply 18... first power supply circuit 20... second power supply circuit 22... inverter 32... interruption circuit 36... capacitor 48... motor 50... processor 52... inverter control unit 54... power monitoring unit 56... determination unit 58... signal output unit 60... write processing unit 62... notification unit 64... non-volatile memory

Claims

1. An inverter control device provided in a vehicle having a first power source and a second power source, the inverter control device is operable by power supplied from the first power source, and is operable by power supplied from the second power source when the supply of power from the first power source is interrupted; The inverter control device includes: an inverter control unit that controls an inverter that drives a motor provided in the vehicle with power supplied from the second power source; a power monitoring unit that monitors a state of power supply from the first power source; a determination unit that determines whether or not the driving state of the vehicle is abnormal based on a signal that indicates the driving state of the vehicle; a signal output unit that outputs a processing signal for cutting off the power supply from the second power source when the determination unit determines that the driving state of the vehicle is abnormal; a write processing unit that writes power interruption information indicating that the supply of power from the first power source has been interrupted into a non-volatile memory when the determination unit determines that the operating state of the vehicle is not abnormal and the power monitoring unit detects that the supply of power from the first power source has been interrupted; Equipped with The signal output unit outputs the processing signal after the writing processing unit completes writing of the power interruption information to the nonvolatile memory.

2. The inverter control device according to claim 1, an alarm unit that, when the power monitoring unit detects that the supply of power from the first power source has been interrupted, issues warning information to notify a user that the supply of power from the first power source has been interrupted.

3. 3. The inverter control device according to claim 2, The notification unit notifies the warning information before the signal output unit outputs the processed signal.

4. The inverter control device according to claim 1, the inverter includes a capacitor that can be charged by power supplied from the second power source; When the signal output unit outputs the processed signal, the inverter control unit controls the inverter to perform a discharge process to release the charge stored in the capacitor.

5. The inverter control device according to claim 1, the signal indicating the operating state of the vehicle includes a first signal and a second signal; The inverter control device, wherein the determination unit determines that the operating state of the vehicle is abnormal when both the first signal and the second signal indicate an abnormality.

6. The inverter control device according to claim 5, The inverter control device, wherein the first signal is a CAN (Control Area Network) signal.

7. The inverter control device according to claim 5, The inverter control device, wherein the second signal is a signal related to a collision of the vehicle.

8. The inverter control device according to claim 1, the inverter control unit, the power monitoring unit, the determination unit, the signal output unit, and the write processing unit are configured by one or more processors, power supplied from the first power supply is supplied to the one or more processors via a first power supply circuit; power supplied from the second power supply is supplied to the one or more processors via a second power supply circuit; An inverter control device, wherein the voltage supplied from the second power source via the second power supply circuit is lower than the voltage supplied from the first power source via the first power supply circuit.

9. The inverter control device according to any one of claims 1 to 8, When the processed signal is output from the signal output unit, the inverter control device cuts off the power supply from the second power source using a cutoff circuit.

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