Power supply system of motor equipment

Abstract

The invention discloses a power supply system of motor equipment. The power supply system comprises a power switch, a first rectifying device, a second rectifying device, a standby power supply device and a control core device, when the power switch is in a conducting state, the first rectifying device is used for supplying a first direct current to the motor load and charging the first energy storage module of the standby power supply device, and the second rectifying device is used for supplying a second direct current to the computer load. The control core device monitors a first charging time when the first energy storage module is fully charged to a first target voltage. When the first charging time is lower than a reminding condition, the core device is controlled to inform the computer load.

Description

Technical Field

[0001] The present invention relates to motor equipment, and particularly to a power supply system for motor equipment. Background Art

[0002] Motor equipment is widely used in production environments. Motor equipment is composed of, for example, a motor load (such as a robotic arm) and a computer load (such as an industrial computer) to control and monitor the operation of the robotic arm through the industrial computer. Since the production environment requires the stable operation of the motor equipment, when power outages, malfunction, power failures or faults occur, the power supply condition of the motor equipment is prone to instability. At this time, the systems of the motor load and the computer load may not be able to complete the normal shutdown procedure, resulting in subsequent failures when restarting or starting the motor load and the computer load, and posing risks to the stability of the production environment.

[0003] Currently, a power supply system can be stabilized by connecting an uninterruptible power supply system to the input power supply terminal of the motor equipment to avoid the above problems. However, the uninterruptible power supply system is bulky and has a high construction cost, which is not conducive to the space construction of the production environment.

[0004] When there is no uninterruptible power supply system installed and the above-mentioned power supply instability occurs, the instantaneous power outage of the motor load will also cause misjudgment of the computer load, thereby affecting the operation stability of restarting or starting.

[0005] In addition, the rechargeable batteries used in the uninterruptible power supply system will affect the overall power storage capacity with the service time and battery quality. However, the life of the rechargeable batteries is not easy to detect, and it is impossible to replace only the rechargeable batteries with weakened power storage capacity. Summary of the Invention

[0006] In view of the above deficiencies, the power supply system of the motor equipment of the present invention can detect the power storage capacity of the backup power supply device to enable the user to replace the weakened energy storage components.

[0007] To achieve the above object, the power supply system of the motor device of the present invention includes a power switch, a first rectifying device, a second rectifying device, a backup power supply device, and a control core device. The power switch is connected to an input power supply and has a conducting state and an open state. The first rectifying device is electrically connected to the power switch and a motor load. The second rectifying device is connected to the power switch and a computer load. The backup power supply device is connected to the first rectifying device and the motor load and includes a first energy storage module. The control core device is electrically connected to the power switch, the computer load, and the backup power supply device. Wherein, when the power switch is in the conducting state, the first rectifying device is used to supply a first direct current to the motor load and charge the first energy storage module, the second rectifying device is used to supply a second direct current to the computer load, and the control core device monitors a first charging time used for the first energy storage module to be fully charged to a first target voltage. When the first charging time is lower than a reminder condition, the control core device notifies the computer load.

[0008] Thus, the power supply system of the motor device of the present invention can supply power to the motor load and the computer load through the first rectifying device and the second rectifying device, and can charge the first energy storage module of the backup power supply device through the first rectifying device to store backup power. The control core device can notify component replacement by comparing the first charging time of the first energy storage module with the reminder condition. In this way, the power supply system of the motor device can supply power to each load more stably.

[0009] The detailed structure, characteristics, circuit, or application mode of the power supply system of the motor device of the present invention will be described in the subsequent detailed description of the embodiments. However, those of ordinary skill in the art of the present invention should understand that these detailed descriptions and the specific embodiments listed for implementing the present invention are only used to illustrate the present invention and are not used to limit the patent application scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a system block diagram of the power supply system of the motor device of the present invention.

[0011] Figure 2 is Figure 1 the circuit diagram of the first protection module and the first energy storage module of the backup power supply device, the detection circuit of the control core device, and the control core and the motor load in

[0012] Figure 3 is Figure 1 the circuit diagram of the second protection module and the second energy storage module of the backup power supply device, and the computer load in

[0013] Figure 4 is Figure 1 the operation flowchart of the power supply system of the motor device of the present invention in

[0014] Figure 5 Is Figure 2 Or Figure 3 The time - voltage characteristic diagram of the supercapacitor in a fully charged state.

[0015] Symbol Explanation

[0016] 100: Power supply system

[0017] 10: Power switch

[0018] 11: Input power supply

[0019] 20: First rectifier device

[0020] 30: Second rectifier device

[0021] 40: Backup power supply device

[0022] 41: First protection module

[0023] 411: First input diode

[0024] 412: First switch circuit

[0025] 413: First low - voltage protection circuit

[0026] 4131: Voltage monitoring unit

[0027] 414: First output diode

[0028] 42: First energy storage module

[0029] 43: Second protection module

[0030] 431: Second input diode

[0031] 432: Second switch circuit

[0032] 433: Second low - voltage protection circuit

[0033] 4331: Voltage monitoring unit

[0034] 434: Second output diode

[0035] 435: Input voltage regulator

[0036] 436: Output voltage regulator

[0037] 44: Second energy storage module

[0038] 45: Energy storage unit

[0039] 451: Supercapacitor

[0040] 452: Resistor

[0041] 453: Energy storage switch

[0042] 50: Control core device

[0043] 51: Detection circuit

[0044] 52: Control core

[0045] 60: Motor load

[0046] 61, 71: Power supply path

[0047] 70: Computer load

[0048] Q1: First transistor

[0049] Q2: Second transistor

[0050] Q3: Third transistor

[0051] P: Optocoupler

[0052] R1, R2: Resistor

[0053] S80 - S89: Steps Detailed implementation manners

[0054] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to specific embodiments and the accompanying drawings.

[0055] The applicant hereby explains that throughout the entire specification, including the embodiments described below and the claims of the claims, the sequential nouns such as first, second, third, etc. are based on the positions of the elements in the drawings. Secondly, in the embodiments and the drawings to be introduced below, the same element numbers represent the same or similar elements or their functional features.

[0056] As Figure 1 shown, the power supply system 100 of the motor device of the present invention includes a power switch 10, a first rectifying device 20, a second rectifying device 30, a backup power supply device 40 and a control core device 50.

[0057] The power switch 10 is connected to an input power supply 11 and has a conducting state and an open state. The power switch 10 can be a mechanical switch or an electronic switch. The input power supply 11 is an alternating current.

[0058] The first rectifying device 20 is connected to the power switch 10 and a motor load 60, and the second rectifying device 30 is connected to the power switch 10 and a computer load 70. Different power supply paths 61 and 71 are formed through the first rectifying device 20 and the second rectifying device 30 to supply power to the motor load 60 and the computer load 70 respectively. The motor load 60 is, for example, the controller of a robotic arm, and the computer load 70 is, for example, an industrial computer.

[0059] Wherein, when the power switch 10 is in the on state, the first rectifying device 20 is used to supply a first direct current to the motor load 60, and the second rectifying device 30 is used to supply a second direct current to the computer load 70. In this embodiment, the voltage of the first direct current is 24 volts, and the voltage of the second direct current is 12 volts. Briefly, the first rectifying device 20 and the second rectifying device 30 can supply different direct current voltages to meet the needs of different loads. In other embodiments, the voltage value of the direct current can also be other parameters.

[0060] The backup power supply device 40 is connected to the first rectifying device 20, the motor load 60 and the computer load 70, and includes a first protection module 41, a first energy storage module 42, a second protection module 43 and a second energy storage module 44. The first protection module 41 is connected to the first rectifying device 20 and the motor load 60. The first energy storage module 42 is connected to the first protection module 41. The second protection module 43 is connected to the first rectifying device 20 and the computer load 70. The second energy storage module 44 is connected to the second protection module 43. The first protection module 41 and the second protection module 43 are used to prevent the power stored in the first energy storage module 42 and the second energy storage module 44 from leaking during normal operation and after shutdown.

[0061] The first protection module 41 includes a first input diode 411, a first switch circuit 412, a first low voltage protection circuit 413 and a first output diode 414. The positive electrode of the first input diode 411 is connected to the first rectifying device 20, and its negative electrode is connected to the first switch circuit 412 and the first energy storage module 42. The first low voltage protection circuit 413 is connected to the first switch circuit 412 and the positive electrode of the first output diode 414, and the negative electrode of the first output diode 414 is connected to the motor load 60. The motor load 60 can also be powered through the power supply path 61 between it and the first rectifying device 20.

[0062] The second protection module 43 includes a second input diode 431, a second switch circuit 432, a second low-voltage protection circuit 433, a second output diode 434, an input voltage regulator 435, and an output voltage regulator 436. The input voltage regulator 435 is connected to the first rectifying device 20 and the positive electrode of the second input diode 431. The negative electrode of the second input diode 431 is connected to the second switch circuit 432 and the second energy storage module 44. The second low-voltage protection circuit 433 is connected to the second switch circuit 432 and the output voltage regulator 436. The positive electrode of the second output diode 434 is connected to the output voltage regulator 436, and the negative electrode of the second output diode 434 is connected to the computer load 70. The computer load 70 can also be powered through a power supply path 71 between the computer load 70 and the second rectifying device 30.

[0063] The control core device 50 is connected to the power switch 10, the backup power supply device 40, and the computer load 70. The control core device 50 can monitor the AC power supply state through the power switch 10 to confirm whether there is normal power supply and the charging states of the first energy storage module 42 and the second energy storage module 44 to confirm the charging capabilities and lifetimes of the energy storage modules. The control core device 50 is used to trigger the first protection module 41 and the second protection module 43.

[0064] In this embodiment, the control core device 50 includes a detection circuit 51 and a control core 52. The detection circuit 51 is connected to the power switch 10 and the control core 52 and is used to detect the power supply state of the alternating current. Among them, when the supply of the alternating current stops for a power outage time that satisfies the control core 52, the control core 52 notifies the computer load 70 to shut down. In this embodiment, the power outage time is several seconds, such as two seconds, three seconds, or four seconds, etc., and the number of seconds can be adjusted. However, when the power outage time is not satisfied, the control core 52 will not notify the computer load 70 to shut down or change the current operation.

[0065] The control core 52 is connected to the first energy storage module 42, the second energy storage module 44, and the computer load 70, and is used to monitor the voltages V42, V44 and lifetimes of the first energy storage module 42 and the second energy storage module 44, and notify the computer load 70 of a reminder condition for monitoring.

[0066] Such as Figures 1 to 3As shown, the first energy storage module 42 and the second energy storage module 44 have similar compositions, with the difference lying in their electricity storage capabilities. The first energy storage module 42 and the second energy storage module 44 respectively include a plurality of energy storage units 45 connected in series. In this embodiment, the first energy storage module 42 and the second energy storage module 44 respectively have seven and five energy storage units 45. Each energy storage unit 45 includes a supercapacitor 451, a resistor 452, and an energy storage switch 453. The supercapacitor 451 is, for example, a lithium-ion supercapacitor. The energy storage switch 453 is connected to the supercapacitor 451, the resistor 452, and the control core device 50. The supercapacitors 451 of the plurality of energy storage units 45 are connected in series, and the resistors 452 are also connected in series. In other embodiments, the number of energy storage units in each energy storage module can be adjusted to be more or less, but it must meet the power consumption requirements of each load.

[0067] The first direct current is used to fully charge the first energy storage module 42 to a first target voltage V42 and the second energy storage module 44 to a second target voltage V44. The first target voltage V42 is approximately the same as the voltage required for the normal operation of the motor load 60, and the second target voltage V44 is approximately the same as the voltage required for the normal operation of the computer load 70.

[0068] When the motor device is turned on or in normal use, indicating that the power switch 10 is in the conducting state, the control core device 50 controls the energy storage switches 453 of the respective energy storage units 45 to conduct, so as to connect the supercapacitor 451 and the resistor 452. When the motor device is turned off or shut down due to a breakdown, the control core device 50 controls the energy storage switches 453 of the respective energy storage units 45 to disconnect according to a shutdown result signal of the computer load 70, so as to interrupt the supercapacitor 451 and the resistor 452. In this way, after the supercapacitor 451 is shut down in various situations, the problem of leakage current causing component damage can be avoided, thereby ensuring the component life and reliability.

[0069] In addition, the compositions and controls of the first switch circuit 412 and the second switch circuit 432 are substantially the same, and the compositions and controls of the first low-voltage protection circuit 413 and the second low-voltage protection circuit 433 are substantially the same. Therefore, the respective circuit elements are represented by the same reference numerals. The first switch circuit 412 and the second switch circuit 432 respectively include a first transistor Q1, a second transistor Q2, and an optocoupler P. The first transistor Q1 is a P-type transistor, and the second transistor Q2 is an N-type transistor. The first low-voltage protection circuit 413 and the second low-voltage protection circuit 433 respectively include a third transistor Q3 and a voltage monitoring unit 4131, 4331. The third transistor Q3 is a P-type transistor. The voltage monitoring units 4131, 4331 include an integrated circuit (solid rectangular block in the figure), a resistor R1, a resistor R2, and a capacitor connected in series. The integrated circuit is, for example, an NCV33161 series monitoring circuit.

[0070] The source of the first transistor Q1 is connected to the first energy storage module 42 or the second energy storage module 44. The drain of the first transistor Q1 is connected to the source of the third transistor Q3, the resistors R2 of the voltage monitoring units 4131 and 4331. The gate of the first transistor Q1 is connected to the drain of the second transistor Q2 and the optocoupler P. The source of the second transistor Q2 is grounded. The gate of the second transistor Q2 is connected to the optocoupler and the computer load 70 (represented by the terminal N70 in the figure). The integrated circuits of the voltage monitoring units 4131 and 4331 are connected to the resistors R1, R2 and the gate of the third transistor Q3 to trigger the third transistor Q3 by detecting the node voltage of the resistors R1 and R2. The node voltage of the resistors R1 and R2 can correspondingly represent the energy storage voltages V42 and V44 of the first energy storage module 42 or the second energy storage module 44. The drain of the third transistor Q3 of the first low voltage protection circuit 413 is connected to the output diode 414. The drain of the third transistor Q3 of the second low voltage protection circuit 433 is connected to the output voltage regulator 436.

[0071] The first switch circuit 412 and the second switch circuit 432 are also connected to the computer load 70 (represented by the terminal N70 in the figure) to operate according to a hardware shutdown signal generated by the shutdown result signal of the computer load 70. After the software shutdown program of the computer load 70 ends, regardless of whether the shutdown result signal indicates that the computer load 70 has completed shutdown or not completed shutdown, the hardware shutdown signal can trigger the first switch circuit 412 and the second switch circuit 432 to present an open circuit state, thus disconnecting the power supply of the backup power supply device 40 from each load. The operation will be described in detail later.

[0072] The first low voltage protection circuit 413 and the second low voltage protection circuit 433 are used to prevent the first energy storage module 42 and the second energy storage module 44 from over-discharging. Over-discharging will reduce the power storage capacity of the first energy storage module 42 and the second energy storage module 44. Therefore, the voltage monitoring units 4131 and 4331 are used to detect the voltages of the first energy storage module 42 and the second energy storage module 44, so as to cut off the power supply path through the third transistor Q3 when the voltage is a low voltage (for example, remaining 3.5 volts or other parameters), thus avoiding over-discharging of the first energy storage module 42 and the second energy storage module 44. In other embodiments, the voltage monitoring units 4131 and 4331 can also be a detection circuit composed of other circuits, not limited to integrated circuits.

[0073] In other embodiments, when the power supply of the computer load 70 has a backup power supply or the backup power supply is sufficient to support the computer load 70 to execute the shutdown process or the time required for backing up data, the second protection module 43 and the second energy storage module 44 can be omitted.

[0074] Such as Figure 4As shown, for the operation of the power supply system 100 of the motor device of the present invention, step S80 is the power switch switching judgment. When the power switch 10 is switched to the conducting state, in step S81, alternating current is supplied to the first rectifying device 20 and the second rectifying device 30 to supply power to the first energy storage module 42 and the second energy storage module 44 of the backup power supply device 40, the motor load 60, and the computer load 70. At this time, the motor load 60 and the computer load 70 can be powered on to operate normally, and the first energy storage module 42 and the second energy storage module 44 are respectively charged to the first target voltage V42 and the second target voltage V44. The control core 52 of the control core device 50 monitors the first charging time used for the first energy storage module 42 to be charged to the first target voltage V42 and the second charging time used for the second energy storage module 44 to be charged to the second target voltage V44, and when the first charging time and the second charging time are lower than the reminder condition, the control core notifies the computer load.

[0075] The reminder condition is related to the electricity storage capacity of the first energy storage module 42 and the second energy storage module 44. The electricity storage capacity can be observed from the fully charged voltage and time of each energy storage module. And since the fully charged voltage and time characteristics of each energy storage module are roughly similar, the difference lies in the fully charged voltage level. Therefore, Figure 5 Taking the charging characteristics of one of the energy storage modules as an example, in this embodiment, the reminder condition is the ratio of the time currently used for each energy storage module to be fully charged to the time used for initial full charge. The time used for full charge is the first charging time and the second charging time required to charge from zero or low voltage to the first target voltage V42 or the second target voltage V44. In the figure, t1 is the initial first charging time or second charging time, represented by a solid line for the charging characteristic of the initial energy storage module, and t2 is the first charging time or second charging time after decline, represented by a dotted line for the charging characteristic of the energy storage module after decline. In this embodiment, the reminder condition is to refer to the ratio of t1 and t2, more specifically, the percentage of t2 divided by t1. When the ratio is lower than a specific parameter (such as 70%), it is determined that the first energy storage module 42 or the second energy storage module 44 should be replaced. The initial first energy storage module 42 or the second energy storage module 44 refers to a component with normal function. In other embodiments, the ratio in the reminder condition will change with the calculation method, and the actual parameter (such as higher than 70% or lower than 70%) can also be adjusted, or the change of time and charging voltage can be referred to and converted into a slope for judgment.

[0076] The control core 52 can notify the computer load 70 according to the reminder condition, so that the computer load 70 can remind the management personnel that the first energy storage module 42 or the second energy storage module 44 should be replaced to ensure that the motor load 60 and the computer load 70 can stably shut down each load or back up data in case of failure, accident, or power outage.

[0077] Subsequently, when the power switch 10 is switched to the open state to stop the AC power supply, this switch may be due to a power outage, a power trip, a malfunction, a fault, or a normal shutdown of the computer load 60, etc. However, regardless of the switching scenario, in the open state, step S82 is for the backup power supply device to supply power, that is, both the first energy storage module 42 and the second energy storage module 44 can supply power to the motor load 60 and the computer load 70 in a timely manner. The control core 52 determines the power outage time based on the open state (step S83) and notifies the computer load 70 to execute a system software shutdown (step S84). In this embodiment, the power outage time is defined as two seconds. If the open state does not reach the power outage time, the control core 52 will not notify the computer load 70 to perform a shutdown operation using the system software. In this way, it is possible to avoid incorrect touches or resetting after an instantaneous disconnection, which may cause the loads to be repeatedly shut down and powered on within a short period, resulting in errors or faults.

[0078] Regardless of whether the system software shutdown is successfully completed, the first switch circuit 412 and the second switch circuit 432 of the backup power supply device 40 can perform a hardware shutdown after the system software performs a shutdown operation. Step S85 is to determine the system software shutdown to confirm whether the computer load 70 has completed the shutdown. If so, the computer load outputs a shutdown result signal to the backup power supply device to interrupt the power supply of the backup power supply device (step S89), that is, the first switch circuit 412 and the second switch circuit 432 are switched to the open state to interrupt the power supply paths of the first energy storage module 42 and the second energy storage module 44 to the motor load 60 and the computer load 70.

[0079] When the software shutdown is not completed, the computer load sends out a shutdown result signal when it reaches a first shutdown period (step S86), that is, it sends out a hardware shutdown signal. Then, if the computer load completes the shutdown, step S89 is executed to interrupt the power supply of the backup power supply device. If the computer load still does not complete the shutdown, the computer load sends out a shutdown result signal when it reaches a second shutdown period (step S87), that is, it sends out the hardware shutdown signal for the second time, and step 89 is executed. In this way, in addition to the software shutdown, it is also possible to control the backup power supply device 40 by the computer load sending out a shutdown result signal to achieve a hardware shutdown, so as to improve problems such as the computer load freezing or malfunctioning.

[0080] Among them, the confirmation of the first shutdown period indicates that the first hardware shutdown is successfully completed. The second shutdown period is longer than the first shutdown period. The confirmation of the second shutdown period is that the previous hardware shutdown failed to successfully shut down the computer load. Therefore, the power supply of the backup power supply device 40 is directly disconnected by a hardware shutdown. Although this embodiment illustrates the operation of the hardware shutdown after the software shutdown is successful and unsuccessful, in other embodiments, the hardware shutdown may not need to refer to the first shutdown period and the second shutdown period, but instead perform a hardware shutdown after the software shutdown is completed to achieve the disconnection of the power supply of each energy storage module.

[0081] The specific embodiments described above further elaborate on the objective, technical solution and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A power supply system for an electric machine device, characterized in that, Comprising: A power switch, connected to an input power supply, and having a conducting state and an open state; A first rectifying device, electrically connected to the power switch and a motor load; A second rectifying device, electrically connected to the power switch and a computer load; A backup power supply device, electrically connected to the first rectifying device and the motor load, and including a first energy storage module; and A control core device, electrically connected to the power switch, the computer load, and the backup power supply device. Wherein, when the power switch is in the conducting state, the first rectifying device is used to supply a first direct current to the motor load and charge the first energy storage module, the second rectifying device is used to supply a second direct current to the computer load, the control core device monitors a first charging time used for the first energy storage module to be fully charged to a first target voltage, and when the first charging time is lower than a reminder condition, the control core device notifies the computer load.

2. The power supply system for an electric machine device according to claim 1, characterized in that, The backup power supply device further includes a second energy storage module, the first direct current is also used to charge the second energy storage module, the control core device also monitors a second charging time used for the second energy storage module to be fully charged to a second target voltage, and when the second charging time is lower than the reminder condition, the control core device notifies the computer load.

3. The power supply system for an electric machine device according to claim 2, characterized in that, The reminder condition includes the ratio of the time used for the current first energy storage module to be fully charged to the first target voltage to the time used for the initial first energy storage module to be fully charged to the first target voltage, and the ratio of the time used for the current second energy storage module to be fully charged to the first target voltage to the time used for the initial second energy storage module to be fully charged to the first target voltage.

4. The power supply system for an electric machine device according to claim 2, characterized in that ,, The first energy storage module and the second energy storage module each include a plurality of energy storage units connected in series. Each unit of the plurality of energy storage units includes a supercapacitor, a resistor, and an energy storage switch. The energy storage switch is connected to the supercapacitor, the resistor, and the control core device, and the control core device controls the energy storage switch according to a shutdown result signal of the computer load.

5. The power supply system for an electric machine device according to claim 4, characterized in that ,, The supercapacitor includes a lithium-ion supercapacitor.

6. The power supply system for an electric machine device according to claim 2, characterized in that, The backup power supply device further includes a first protection module and a second protection module. The first protection module is connected to the first rectifying device, the first energy storage module, the control core device, and the motor load. The second protection module is connected to the first rectifying device, the second energy storage module, the control core device, and the computer load. The control core device is used to trigger the first protection module and the second protection module.

7. The power supply system for an electric machine device according to claim 6, characterized in that, The first protection module includes a first input diode and a first switch circuit. The positive electrode of the first input diode receives the first direct current, and the negative electrode of the first input diode is connected to the first switch circuit, the first energy storage module, and the computer load. The second protection module includes a second input diode and two first switch circuits. The positive electrode of the second input diode receives the first direct current, and the negative electrode of the second input diode is connected to the second switch circuit, the second energy storage module, and the computer load. When the power switch is in the open state, the first energy storage module and the second energy storage module supply power to the motor load and the computer load respectively for shutdown, and the computer load outputs a shutdown result signal to control the first switch and the second switch.

8. The power supply system for an electric machine device according to claim 7, characterized in that, The first protection circuit includes a first low-voltage protection circuit, and the first low-voltage protection circuit is connected to the first switch and the motor load. The second protection circuit includes a second low-voltage protection circuit, which is connected to the second switch circuit and the computer load.

9. The power supply system for an electric machine device according to claim 1, characterized in that, The control core device includes a detection circuit and a control core. The detection circuit is connected to the power switch and the control core and is used to detect the power supply state of the alternating current. When the supply of the alternating current stops for a power outage time that satisfies the control core, the control core notifies the computer to shut down.

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