Power supply system of electromechanical facility

Abstract

To provide a power supply system of an electromechanical facility.SOLUTION: A power supply system of an electromechanical facility comprises: a power switch; a first rectifier; a second rectifier; a standby power supply device; and a control core device. The first rectifier charges a first power storage module simultaneously with supplying first DC current to an electromechanical load when the power switch is in an open circuit state. The second rectifier supplies second DC current to a computer load. The control core device charges the first power storage module to a first target voltage to monitor first charging time to be fully charged. The control core device issues notification to the computer load when the first charging time is below a presentation condition.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to electromechanical equipment, and more particularly to a power supply system for electromechanical equipment.

Background Art

[0002] In electromechanical equipment widely applied in a production environment, such as electromechanical equipment constructed from electromechanical loads (such as robot arms) and computer loads (such as industrial computers, etc.), it is the role of the industrial computer to control and monitor the operation of the robot arm. When a fuse blows, malfunction, power outage, or failure occurs in the electromechanical equipment in the production environment, the power supply situation of the electromechanical equipment cannot be stably maintained, and the systems of the electromechanical load and the computer load cannot be shut down normally. Therefore, restarting or newly starting the electromechanical load and the computer load may cause a failure, and there is a risk of affecting the stability of the production environment.

[0003] In order to avoid the above-mentioned problems, it is possible to adopt a method of connecting the input power supply end of the electromechanical equipment to an uninterruptible power supply device to maintain the stability of the power supply system. However, since the uninterruptible power supply device has a very large volume and installation cost, not only the space of the production environment is occupied, but also the cost is high.

[0004] If the uninterruptible power supply device is not installed and an instantaneous power outage occurs in the electromechanical load under an unstable power supply situation, the computer may make an incorrect judgment, which affects the stability of the restarted or newly started operation.

[0005] The longer the usage time of the rechargeable battery of the uninterruptible power supply device, the more the quality and power storage capacity of the battery decrease. In particular, since it is difficult to diagnose the life of the rechargeable battery, the rechargeable battery with weakened power storage capacity cannot be replaced alone.

Summary of the Invention

Problems to be Solved by the Invention

[0006] In view of the above-mentioned drawbacks, the main object of the present invention is to provide a power supply system for electromechanical equipment that can detect the power storage capacity of a backup power supply device, provide the detection result to the user, and allow the user to replace the deteriorated power storage unit.

Means for Solving the Problems

[0007] To solve the above-mentioned problems, the power supply system for electromechanical equipment includes a power switch, a first rectifier device, a second rectifier device, a backup power supply device, and a control core device. The power switch is connected to the input power supply and switches between an open-circuit state and a closed-circuit state. The first rectifier device is electrically connected to the power switch and the electromechanical load. The second rectifier device is connected to the power switch and the computer load. The backup power supply device is connected to the first rectifier device and the electromechanical load and has a first power storage module. The control core device is electrically connected to the power switch, the computer load, and the backup power supply device. When the power switch is Closed in the circuit state, the first rectifier device supplies a first direct current to the electromechanical load and simultaneously charges the first power storage module. The second rectifier device supplies a second direct current to the computer load. The control core device charges the first power storage module to a first target voltage and monitors the first charging time to full charge. When the first charging time is below the presentation condition, the control core device issues a notification to the computer load.

[0008] Summarizing the above, the power supply system for electromechanical equipment according to the present invention supplies power to the electromechanical load and the computer load by the first rectifier device and the second rectifier device, and simultaneously charges the first power storage module of the backup power supply device through the first rectifier device to store backup power. The control core device notifies the timing of component replacement by comparing the first charging time of the first power storage module with the presentation condition. With the above-mentioned technical features, the power supply system for electromechanical equipment can stably maintain power supply to each load.

[0009] The detailed structure, features, assembly, or usage method of the power supply system for electromechanical equipment according to the present invention will be clarified through the following detailed description of the embodiments. Also, the following detailed description and the embodiments presented by the present invention are merely examples for explaining the present invention, and it should be understandable to those with common sense in the field related to the present invention that the claims of the present invention cannot be limited thereby.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Modes for Carrying Out the Invention

[0011] Hereinafter, a power supply system for electromechanical equipment according to the present invention will be described with reference to the drawings. In the specification and drawings, the components denoted by numbers such as first, second, and third are defined based on the order of their positions in the drawings. Also, the same reference numerals indicate the structural features of the same components or similar components.

[0012] (One Embodiment) As shown in FIG. 1, a power supply system 100 for electromechanical equipment according to an embodiment of the present invention includes a power switch 10, a first rectifier 20, a second rectifier 30, a backup power supply device 40, and a control core device 50.

[0013] The power switch 10 is connected to the input power supply 11 and switches between an open - circuit state and a closed - circuit state. The power switch 10 is a mechanical switch or an electronic switch. The input power supply 11 is an alternating current.

[0014] The first rectifier device 20 is electrically connected to the power switch 10 and the electromechanical load 60. The second rectifier device 30 is connected to the power switch 10 and the computer load 70. The first rectifier device 20 and the second rectifier device 30 build power supply paths 61, 71 and then supply power to the electromechanical load 60 (for example, the controller of a robotic arm) and the computer load 70 (for example, an industrial computer) separately.

[0015] When the power switch 10 is Closed in the circuit - on state, the first rectifier device 20 supplies a first direct - current to the electromechanical load 60. The second rectifier device 30 supplies a second direct - current to the computer load 70. In this embodiment, the voltage of the first direct - current is 24V. The second direct - current is 12V. That is, the first rectifier device 20 and the second rectifier device 30 can supply direct - currents with different voltages to different loads. In another embodiment, the voltage value of the direct - current may be another parameter.

[0016] The backup power supply device 40 is connected to the first rectifier device 20, the electromechanical load 60 and the computer load 70, and has 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 rectifier device 20 and the electromechanical 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 rectifier 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 maintain the power of the first energy - storage module 42 and the second energy - storage module 44 normally and at the same time prevent power leakage after shutdown.

[0017] 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 anode of the first input diode 411 is connected to the first rectifier device 20, and the cathode 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 anodes of the first switch circuit 412 and the first output diode 414. The cathode of the first output diode 414 is connected to the electromechanical load 60. The power supply between the electromechanical load 60 and the first rectifier device 20 is carried out by the power supply path 61.

[0018] 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 stabilizer 435, and an output voltage stabilizer 436. The input voltage stabilizer 435 is connected to the anodes of the first rectifier device 20 and the second input diode 431. The cathode 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 stabilizer 436. The anode of the second output diode 434 is connected to the output voltage stabilizer 436, and the cathode is connected to the computer load 70. The power supply between the computer load 70 and the second rectifier device 30 is carried out by the power supply path 71.

[0019] The control core device 50 is electrically connected to the power switch 10, the standby power supply device 40, and the computer load 70. The control core device 50 monitors the supply state of the alternating current of the power switch 10 and then determines whether to supply power normally. At the same time, it monitors the charging status of the first energy storage module 42 and the second energy storage module 44, and then confirms the charging capacity and lifespan of each energy storage module. The control core device 50 operates the first protection module 41 and the second protection module 43.

[0020] 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 detects the supply state of the alternating current. When the supply of the alternating current stops and a power outage time occurs in the control core 52, the control core 52 instructs the computer load 70 to shut down. In this embodiment, the power outage time is in seconds such as 2 seconds, 3 seconds, 4 seconds, etc., and may be adjusted according to the situation. As long as there is no power outage time, the control core 52 does not instruct the computer load 70 to shut down or change the operation.

[0021] The control core 52 is connected to the first power storage module 42, the second power storage module 44, and the computer load 70, and monitors the voltages V 42 、V 44 and the lifespan of the first power storage module 42 and the second power storage module 44, and notifies the computer load 70 of the corresponding presentation conditions.

[0022] As shown in FIGS. 1 to 3, the configurations of the first power storage module 42 and the second power storage module 44 are similar, but the power storage capabilities of the power storage module 42 and the second power storage module 44 are different. The first power storage module 42 and the second power storage module 44 each have a plurality of power storage units 45 connected in series. In this embodiment, the first power storage module 42 has seven power storage units 45. The second power storage module 44 has five power storage units 45. The power storage unit 45 includes a supercapacitor 451, a resistor 452, and a power storage switch 453. The supercapacitor 451 is a lithium-ion supercapacitor or the like. The power storage switch 453 is connected to the supercapacitor 451, the resistor 452, and the control core device 50. In the plurality of power storage units 45, the supercapacitors 451 are connected in series, and the resistors 452 are connected in series. In another embodiment, the number of power storage units of each power storage module may increase or decrease. As long as the power supply and demand of each load can be satisfied.

[0023] The first power storage module 42 is set to a first target voltage V 42until charging and fully charging, and the situation of fully charging and the second power storage module 44 to the second target voltage V 44 until charging and fully charging, the first DC current corresponds to the situation. The first target voltage V 42 is consistent with the voltage required for the normal operation of the electromechanical load 60. The second target voltage V 44 is consistent with the voltage required for the normal operation of the computer load 70.

[0024] When the electromechanical equipment is started or normally used, the power switch is Closed in the circuit state. That is, the control core device 50 maintains the power storage switch 453 of each power storage unit 45 in the Closed circuit state, and maintains the supercapacitor 451 and the resistor 452 in the connected state. When the electromechanical equipment is shut down or abnormally terminated, the control core device 50 shuts off the supercapacitor 451 and the resistor 452 through the power storage switch 453 of each power storage unit 45 based on the shutdown signal of the computer load 70. Therefore, after the supercapacitor 451 shuts down under various situations, it can avoid component damage caused by leakage and ensure the component life and reliability.

[0025] The first switch circuit 412 and the second switch circuit 432 have the same construction and control, and the first low-voltage protection circuit 413 and the second low-voltage protection circuit 433 have the same construction and control. Therefore, the components related to the circuit are indicated by the same reference numerals. The first switch circuit 412 and the second switch circuit 432 each have a first transistor Q1, a second transistor Q2, and a photocoupler P. The first transistor Q1 is a P-type transistor. The second transistor Q2 is an N-type transistor. The first low-voltage protection circuit 413 and the second low-voltage protection circuit 433 each have a third transistor Q3 and voltage monitoring units 4131, 4331. The third transistor Q3 is a P-type transistor. The voltage monitoring units 4131, 4331 have an integrated circuit (rectangular block in the figure), resistors R1, R2 connected in series, and a capacitor. The integrated circuit is an NCV33161 series monitoring circuit or the like.

[0026] The source of the first transistor Q1 is connected to the first power storage module 42 or the second power storage module 44. The drain of the first transistor Q1 is connected to the source of the third transistor Q3 and the resistor R1 of the voltage monitoring units 4131, 4331. The gate of the first transistor Q1 is connected to the drain of the second transistor Q2 and the photocoupler P. The source of the second transistor Q2 is connected to the ground. The gate of the second transistor Q2 is connected to the photocoupler P and the computer load 70 (i.e., terminal N 70 ). The integrated circuits of the voltage monitoring units 4131, 4331 are connected to the resistors R1, R2 and the third transistor Q3, and activate the third transistor Q3 by detecting the node voltages of the resistors R1, R2. The node voltages of the resistors R1, R2 correspond to the stored voltages V 42 , V 44 of the first power storage module 42 or the second power 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 stabilizer 436.

[0027] The first switch circuit 412 and the second switch circuit 432 are connected to the computer load 70 (i.e., terminal N 70 ), and generate a hardware shutdown signal based on the shutdown signal of the computer load 70. After the software of the computer load 70 shuts down, even if the shutdown signal indicates whether the shutdown operation of the computer load 70 is completed or not, the hardware shutdown signal causes the first switch circuit 412 and the second switch circuit 432 to Open maintain the circuit state and cut off the power supply to the standby power supply device 40 and each load.

[0028] The first low-voltage protection circuit 413 and the second low-voltage protection circuit 433 separately suppress over-discharge of the first power storage module 42 and the second power storage module 44. Specifically, if the first power storage module 42 and the second power storage module 44 are in an over-discharged state, the power storage performance of the first power storage module 42 and the second power storage module 44 will deteriorate. Therefore, the voltage monitoring units 4131 and 4331 can monitor the voltages of the first power storage module 42 and the second power storage module 44. When it is determined that the voltage is a low voltage (3.5 volts or another parameter), the third transistor Q3 cuts off the power supply path to suppress over-discharge of the first power storage module 42 and the second power storage module 44. In another embodiment, the voltage monitoring units 4131 and 4331 are not limited to integrated circuits, and a detection circuit composed of another circuit may be employed.

[0029] In another embodiment, if the power supply device of the computer load 70 is provided with a backup power supply, or a backup power supply that can assist until the shutdown operation or data backup operation of the computer load 70 is completed, the second protection module 43 and the second power storage module 44 may not be arranged.

[0030] FIG. 4 is a related diagram showing the process of the power supply system 100 of the electromechanical equipment according to the present invention. In step S80, the switching timing of the power switch 10 is determined, and the power switch 10 is Closed switched to the circuit state. In step S81, by supplying an alternating current to the first rectifying device 20 and the second rectifying device 30, power is supplied to the first power storage module 42 and the second power storage module 44 of the backup power supply device 40, the electromechanical load 60, and the computer load 70. At this time, the electromechanical load 60 and the computer load 70 are activated and operate normally. The first power storage module 42 is charged to the first target voltage V 42 until it reaches full charge. The second power storage module 44 is charged to the second target voltage V44 until it reaches full charge. The control core 52 of the control core device 50 charges the first power storage module 42 to the first target voltage V 42until it is fully charged, the first charging time to fully charge, and the second energy storage module 44 to the second target voltage V 44 until it is fully charged, and monitors the second charging time to fully charge. When the first charging time and the second charging time fall below the presentation condition, the control core 52 issues a notification to the computer load 70.

[0031] The presentation condition is related to the power storage capabilities of the first energy storage module 42 and the second energy storage module 44. The power storage capabilities can be observed by the voltage and time required for each energy storage module to reach full charge. The voltage and time characteristics for each energy storage module to reach full charge are similar. The difference lies in the voltage level to reach full charge. Subsequently, as shown in FIG. 5, the charging characteristics of one of the energy storage modules will be described. In this embodiment, the presentation condition is the ratio of the initial time and the current elapsed time to charge the energy storage module to the fully charged state. The time to charge the energy storage module to the fully charged state and use is zero or under a low voltage state to the first target voltage V 42 or the second target voltage V 44 until it is fully charged, the first charging time and the second charging time to reach full charge. The initial first charging time or the second charging time is denoted as t1. The charging characteristics of the initial energy storage module are represented by a solid line. The first charging time and the second charging time after attenuation are denoted as t2. The charging characteristics of the attenuated energy storage module are represented by a dashed line. The presentation condition refers to the ratio of t1 and t2, that is, the percentage obtained by dividing t2 by t1. When the ratio falls below a specific parameter (for example, 70%), replacement of the first energy storage module 42 or the second energy storage module 44 is recommended. The initial first energy storage module 42 and the second energy storage module 44 are components with normal performance. In another embodiment, the ratio of the presentation condition may vary depending on the calculation method, but is not limited thereto, and may also be a method of adjusting the actual parameter (for example, 70% or more or 70% or less) or forming a slope with reference to the changes in time and charging voltage for determination.

[0032] The control core 52 issues a notification to the computer load 70 according to the presentation conditions. Since the computer load 70 notifies the administrator of the timing for replacing the first power storage module 42 and the second power storage module 44, when a failure or sudden power outage occurs, it can ensure that the electromechanical load 60 and the computer load 70 smoothly complete the shutdown or data backup of their respective loads.

[0033] Subsequently, when a power outage, a fuse blows, a malfunction or failure occurs, or the computer load 70 is normally shut down, the power switch 10 Open is switched to the circuit state and the supply of alternating current is stopped. In step S82, due to various causes Open when switching to the circuit state, the backup power supply device supplies power. That is, the first power storage module 42 and the second power storage module 44 can timely supply power to the electromechanical load 60 and the computer load 70. The control core 52 Open shuts down the system software of the computer load 70 based on the time until the power runs out in the circuit state (see step S83) (see step S84). In this embodiment, the power outage time is defined as 2 seconds. Open When the time until the power runs out in the circuit state has not been reached, the control core 52 does not instruct the computer load 70 to execute a system software shutdown, so it is possible to avoid causing malfunctions or failures by repeatedly shutting down and starting the load within a short time due to malfunctions, momentary interruptions, and momentary restorations.

[0034] Regardless of whether the system software shutdown is completed normally or not, if the system software shutdown is completed normally, the first switch circuit 412 and the second switch circuit 432 of the backup power supply device 40 perform a hardware shutdown. Step S85 is to confirm whether the shutdown operation of the computer load 70 is completed according to the judgment of the system software shutdown. When the computer load 70 outputs a shutdown completed signal to the backup power supply device 40 and interrupts the power supply operation (see step S89), the first switch circuit 412 and the second switch circuit 432 Open are switched to the circuit state, so the paths for the first power storage module 42 and the second power storage module 44 to supply electricity to the electromechanical load 60 and the computer load 70 are cut off.

[0035] If the software shutdown is not yet completed, when the computer load 70 reaches the first shutdown cycle, it sends a shutdown completed signal (see step S86), that is, it sends a hardware shutdown signal. Subsequently, after the shutdown operation of the computer load 70 is completed, step S89 is advanced to interrupt the power supply operation of the backup power supply device. If the shutdown operation of the computer load 70 is not yet completed, when the computer load 70 reaches the second shutdown cycle, it sends a shutdown completed signal (see step S87), that is, it sends a second hardware shutdown signal and executes step S89. In addition to the software shutdown, the backup power supply device 40 can be controlled based on the shutdown completed signal from the computer load 70, and the abnormal termination or failure of the computer load 70 can be avoided by performing a hardware shutdown.

[0036] The second shutdown period is longer than the time of the first shutdown period. When the first shutdown period can be confirmed, it indicates that the first hardware shutdown has been completed normally. Since the second shutdown period is confirmed by the computer load where the shutdown did not complete normally during the previous hardware shutdown, the power supply of the backup power supply device 40 is cut off by the hardware shutdown. This embodiment will proceed with the explanation by listing the process of the hardware shutdown after the software shutdown is completed normally and the process of the hardware shutdown after the software shutdown is not completed normally. In another embodiment, it is not necessary to refer to the first shutdown period and the second shutdown period for the hardware shutdown. After the software shutdown is completed, if the hardware shutdown is advanced, the power supply to each power storage module can be cut off.

Explanation of Signs

[0037] 100: Power supply system 10: Power switch 11: Input power supply 20: First rectifier 30: Second rectifier 40: Backup power supply device 41: First protection module 411: First input diode 412: First switch circuit 413: First low voltage protection circuit 4131: Voltage monitoring unit 414: First output diode 42: First power storage module 43: Second protection module 431: Second input diode 432: Second switch circuit 433: Second low voltage protection circuit 4331: Voltage monitoring unit 434: Second output diode 435: Input voltage stabilizer 436: Output voltage stabilizer 44: Second power storage module 45: Power storage unit 451: Supercapacitor 452: Resistor 453: Power storage switch 50: Control core device 51: Detection circuit 52: Control core 60: Electromechanical load 61, 71: Power supply path 70: Computer load Q1: First transistor Q2: Second transistor Q3: Third transistor P: Photo coupler R1, R2: Resistor S80 to S89: Step

Claims

1. A power supply switch, a first rectifier device, a second rectifier device, a backup power supply device, and a control core device are provided. The power supply switch is connected to an input power supply and switches between an open circuit state and a closed circuit state. The first rectifier device is electrically connected to the power supply switch and an electromechanical load. The second rectifier device is electrically connected to the power supply switch and a computer load. The backup power supply device is electrically connected to the first rectifier device and the electromechanical load and has a first energy storage module. The control core device is electrically connected to the power supply switch, the computer load, and the backup power supply device. When the power supply switch is in the open circuit state, the first rectifier device supplies a first DC current to the electromechanical load and simultaneously charges the first energy storage module, the second rectifier device supplies a second DC current to the computer load, and the control core device charges the first energy storage module to a first target voltage and monitors a first charging time to fully charge it. When the first charging time is below a presentation condition, the control core device issues a notification to the computer load. A power supply system for electromechanical equipment is characterized by this.

2. The backup power supply device further has a second energy storage module, and the second energy storage module is charged by the first DC current. The control core device charges the second energy storage module to a second target voltage and monitors a second charging time to fully charge it. When the second charging time is below the presentation condition, the control core device issues a notification to the computer load. The power supply system for electromechanical equipment according to claim 1 is characterized by this.

3. The presentation condition includes a ratio of a current time taken to charge the first energy storage module to the first target voltage and fully charge it to an initial time taken to charge the first energy storage module to the first target voltage and fully charge it, and a ratio of a current time taken to charge the second energy storage module to the second target voltage and fully charge it to an initial time taken to charge the second energy storage module to the second target voltage and fully charge it. The power supply system for electromechanical equipment according to claim 2 is characterized by this.

4. The first power storage module and the second power storage module each have a plurality of power storage units connected in series, and the plurality of power storage units each have a supercapacitor, a resistor, and a power storage switch. The power storage switch is connected to the supercapacitor, the resistor, and the control core device. The power supply system for electromechanical equipment according to claim 2, wherein the control core device controls the power storage switch based on the shutdown signal of the computer load.

5. The standby power supply device further has a first protection module and a second protection module. The first protection module is connected to the first rectifying device, the first power storage module, the control core device, and the electromechanical load. The second protection module is connected to the first rectifying device, the second power storage module, the control core device, and the computer load. The control core device activates the first protection module and the second protection module. The first protection module has a first input diode and a first switch circuit. The positive electrode of the first input diode catches the first direct current, and the negative electrode of the first input diode is connected to the first switch circuit, the first power storage module, and the computer load. The second protection module has a second input diode and a second switch circuit. The positive electrode of the second input diode catches the first direct current, and the negative electrode of the second input diode is connected to the second switch circuit, the second power storage module, and the computer load. When the power switch is in the closed circuit state, the first power storage module and the second power storage module separately supply electricity to the electromechanical load and the computer load, execute shutdown, and the first switch circuit and the second switch circuit are controlled by the shutdown signal of the computer load. The power supply system for electromechanical equipment according to claim 2.

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