TWI688183B - Surge protection device - Google Patents

Abstract

A surge protection device includes a surge protection circuit, a controller, and a wireless module. The surge protection circuit has a plurality of surge protection elements, receives a power source and correspondingly generates a sampling signal according to the power source. The controller compares a representative voltage value of the power source that corresponding to the sampling signal and the first reference value to determine a using state of the surge protection circuit. The wireless module correspondingly transmits the using state to a remote server.

Description

Surge protection device

The invention relates to a surge protection device, and in particular to a surge protection device capable of intelligently reporting a damaged state.

In the power supply system, during the process of supplying power to the circuit equipment, if an abnormal overvoltage of the power supply is encountered, a surge overvoltage (or overcurrent) phenomenon may occur. When such a surge overvoltage is applied to a circuit device, it will cause deterioration or damage of circuit elements.

Therefore, in the conventional technology, a surge protector is often used to protect the circuit device against surge overvoltage. However, when the surge protector is damaged due to excessive surge overvoltage, the user cannot immediately know whether the surge protector is damaged and needs maintenance, resulting in the next surge overvoltage, Surge overvoltage will directly impact the back-end circuit equipment and cause damage, but the user must wait until the circuit equipment is not functioning properly to know the damage of the surge protector. Therefore, how to monitor the state of the surge protector in real time is an important issue.

The invention provides a surge protection device, which can intelligently detect and judge the damage state of a circuit and promptly report back.

The surge protection device of the present invention includes a surge protection circuit, a controller and a wireless module. The surge protection circuit has a plurality of surge protection elements. The surge protection circuit receives power and generates a sampling signal according to the power. The controller is coupled to the surge protection circuit. The controller compares the representative voltage value of the power supply corresponding to the sampled signal with the first reference value to determine the usage state of the surge protection circuit. The wireless module is coupled to the controller and correspondingly transmits the usage status to a remote server.

Based on the above, the surge protection device of the present invention can perform surge protection operation on the power supply by a plurality of surge protection elements in the surge protection circuit, and generate a sampling signal corresponding to the power supply for comparison and sampling through the controller The representative value of the voltage of the power supply corresponding to the signal and the size of the first reference value determine the usage status of the surge protection circuit at this time, and the wireless module correspondingly transmits the usage status to the remote server to protect the surge protection circuit Real-time monitoring of the usage status of the system allows users to know the current status of the surge protection circuit as soon as possible, and then determine whether maintenance and repair actions are required.

In order to make the above-mentioned features and advantages of the present invention more obvious and understandable, the embodiments are specifically described below in conjunction with the accompanying drawings for detailed description as follows.

100, 200, 300: Surge protection device

110, 210, 310: surge protection circuit

120, 220, 320: controller

130, 230, 330: wireless module

211, 311: Surge absorption circuit

212, 312: Sampling circuit

240, 340: power conversion circuit

250, 350: switch circuit

260, 360: indicator circuit

270, 370: voltage regulator

D3~D14: Diode

Dsig: damaged signal

F1~F2: fuse element

G: ground voltage

GEN: ground end

GND: Reference ground voltage

L: live wire voltage

L1: first live wire voltage

LEN: FireWire

Lo: Output FireWire

N: neutral voltage

N1: the first neutral line voltage

NEN: Neutral terminal

No: output neutral terminal

Q1: Transistor

R1~R14: resistance

Rasig: sampling signal/sampling voltage

Rbsig: control signal

RL1: relay switch

RSE: remote server

T1: Transformer

VDD, Vcc: power supply voltage

VR1~VR3: Surge protection components

VS: power supply

ZD1~ZD5: Inspect diode

FIG. 1 is a schematic diagram of a surge protection device according to an embodiment of the invention.

2 is a schematic circuit block diagram of a surge protection device according to another embodiment of the invention.

FIG. 3 is a schematic circuit block diagram of a surge protection device according to another embodiment of the invention.

Please refer to FIG. 1, which is a schematic diagram of a surge protection device according to an embodiment of the invention. The surge protection device 100 includes a surge protection circuit 110, a controller 120, and a wireless module 130. The surge protection circuit 110 has a plurality of surge protection elements (such as the surge protection elements VR1~VR3 shown in FIG. 3) and is used to receive the power supply VS. The surge protection circuit 110 uses a plurality of surge protection elements to control the power supply VS performs surge protection and generates a sampling signal Rasig according to the power supply VS. The controller 120 is coupled to the surge protection circuit 110, and a first reference value is preset in the controller 120, wherein the controller 120 can obtain a representative value of the voltage of the power supply VS corresponding to the sampling signal Rasig and compare the representative value of the voltage The magnitude of the first reference value is used to determine the usage state of the surge protection circuit 110, wherein the voltage representative value is the representative value corresponding to the voltage value of the power supply VS corresponding to the current sampling signal Rasig.

The usage state of the surge protection circuit 110 includes a normal state and a damaged state. The normal state indicates a state where the surge protection circuit 110 can operate normally. The damaged state is, for example, a state damaged by a surge overvoltage of the power supply VS. The invention is not limited to this. When the controller 120 determines that the surge protection circuit 110 is in a damaged state, the controller 120 can generate a damaged signal Dsig to the wireless module 130, and cause the wireless module 130 uploads the damaged signal Dsig to the remote server RSE, thereby using the real-time report wave protection circuit 110 to the remote server RSE.

It is worth mentioning that the multiple surge protection elements in the surge protection circuit 110 of this embodiment may be, for example, varistors. The controller 120 may be, for example, a micro controller unit (MCU). In addition, the wireless module 130 of this embodiment may, for example, support a Global System for Mobile Communication (GSM) system, a Personal Handy-phone System (PHS), and code multiple acquisition (Code Division Multiple Access (CDMA) system, Wireless fidelity (Wi-Fi) system, Worldwide Interoperability for Microwave Access (WiMAX) system or Bluetooth wireless communication module, but The embodiments of the present invention are not limited thereto.

In detail, in this embodiment, the surge protection circuit 110 can receive the power supply VS, and when a surge occurs in the power supply VS, a plurality of surge protection elements are used to perform a surge protection operation to absorb the power supply VS surge To avoid damage to the circuit equipment at the back of the surge protection device due to the surge. When the surge voltage on the power supply VS is too large (that is, the surge overvoltage is greater than the voltage protection specifications of each surge protection element), the excessive voltage of the surge will damage the surge protection element, thereby causing the surge protection circuit 110 to be damaged status. At this time, the controller 120 will further compare the voltage representative value of the power supply VS corresponding to the sampling signal Rasig with the first reference value to determine the state of the surge protection circuit 110.

To further explain, after the surge protection circuit 110 receives the power supply VS, Steps such as overvoltage protection and sampling operation can be performed on the voltage value of the power supply VS (for example, 220 volts AC voltage), and a sampling voltage Rasig (for example, 0~5 volts DC voltage is generated, but not limited to this ). The controller 120 can convert the received sampling voltage Rasig into a corresponding voltage representative value of the power supply VS. For example, when the voltage value of the power supply VS is an AC voltage of 255 volts, the voltage value of the sampling voltage Rasig received by the controller 120 may be, for example, a DC voltage of 5 volts. Create a database (or look-up table) to find the representative value of the voltage corresponding to the sampling voltage Rasig (for example, 255Vac), where the representative value of the voltage is the representative of the voltage value of the power supply VS corresponding to the current sampling signal Rasig Numerical value, for example, when the voltage value of the power supply VS is 200 volts AC voltage, the representative value of the voltage at this time is 255Vac; and when the voltage value of the power supply VS is 100 volts AC voltage, the representative value of the voltage at this time is 100Vac, so on. It should be noted that the setting of the conversion method between the voltage representative value of the present invention and the power supply VS is not limited to the above conversion method. The above conversion method is only an exemplary embodiment, but those of ordinary skill in the art can refer to the existing voltage value The conversion method with the numerical value is applied to the present invention, which is not limited by the present invention.

Then, the controller 120 can compare the converted voltage representative value (that is, the representative value of the voltage value of the power supply VS corresponding to the sampling voltage Rasig) with the first reference value (for example, 5Vac) preset in the controller 120 When the controller 120 determines that the representative value of the voltage of the power supply VS corresponding to the sampling signal Rasig is less than the first reference value, it means that the voltage value of the sampling signal Rasig generated by the surge protection circuit 110 at this time is quite small (for example, zero volt or Approaching zero volts), the controller 120 can determine this The surge protection circuit 110 is in a damaged state, and generates a damaged signal Dsig to the wireless module 130, so that the wireless module 130 uploads the damaged signal Dsig to the remote server RSE for immediate reporting of the damaged state, wherein the damaged signal Dsig is used To record the damage state of the surge protection circuit 110.

In addition, it is worth noting that in other embodiments of the present invention, the surge protection circuit 110 further includes a plurality of fuse elements (fuse elements F1 to F2 shown in FIG. 3), wherein the plurality of fuse elements are coupled to a plurality of Surge protection element. When multiple surge protection elements are damaged by the surge of the power supply VS and are in a damaged state (that is, the surge overvoltage is greater than the voltage protection specifications of each surge protection element and damages each surge protection element), the multiple fuse elements can The overcurrent generated by the surge overvoltage of the power supply VS is melted, thereby blocking the current paths of the multiple surge protection elements, so that the voltage value of the sampling signal Rasig generated by the surge protection circuit 110 becomes Quite small (ie, the voltage is zero volts or approaching zero volts), where the multiple fuse elements may be, for example, thermal fuses. Because the current path of each damaged surge protection element is blocked by the fuse element, in this way, the purpose of preventing the back-end circuit equipment from being directly damaged by surge overvoltage due to the damage of the surge protection element can be achieved.

Based on the foregoing description, it is not difficult to know that in the surge protection device 100 of the present invention, when the surge protection circuit 110 is damaged due to the excessive voltage of the power supply VS, the controller 120 can compare the sampled signal Rasig The voltage representative value of the power supply VS corresponding to the voltage value and the size of the first reference value to know the usage state of the surge protection circuit 110, to detect whether the surge protection circuit 110 is in a damaged state, and to determine the surge protection When the circuit 110 is in a damaged state, the wireless module 130 is uploaded The damaged signal Dsig is sent to the remote server RSE for real-time reporting, so that the user can arrange for the replacement of the damaged surge protection circuit 110 according to the damaged signal Dsig, so as to let the user know the damage of the surge protection circuit in the first time Status, and the purpose of immediate maintenance and repair.

Please refer to FIG. 2, which is a schematic block diagram of a surge protection device according to another embodiment of the invention. The difference from the previous embodiment is that the surge protection device 200 of this embodiment includes a surge protection circuit 210, a controller 220, a wireless module 230, a power conversion circuit 240, a switching circuit 250, an indicator circuit 260, and a voltage stabilizer压器270. The surge protection circuit 210 includes a surge absorption circuit 211 and a sampling circuit 212. The surge absorption circuit 211 has a plurality of surge protection elements for receiving the live voltage L, the neutral voltage N and the ground voltage G of the power supply VS to generate the first live voltage L1 and the first neutral voltage N1, And a plurality of surge protection elements are used to perform a surge protection action on the power supply VS, that is, an overvoltage protection operation, wherein the power supply VS of this embodiment is a single-phase AC power supply provided by a commercial power system (here, for example, a single-phase AC power supply) Three-wire AC power supply). The sampling circuit 212 is coupled to the surge absorption circuit 211, and performs a step-down operation and a full-wave rectification operation on the first live line voltage L1 and the first neutral line voltage N1, and samples accordingly to generate a sampling signal Rasig.

The controller 220 presets a first reference value, and the controller 220 can receive the sampling signal Rasig and compare the representative value of the voltage of the power supply VS corresponding to the sampling signal Rasig with the first reference value to determine the use of the surge protection circuit 210 status. When the voltage value of the power supply VS corresponding to the sampling signal is greater than the first reference value, the controller 220 can determine that the surge protection circuit 210 is in a normal state, and when the sampling signal Rasig corresponds When the voltage value of the power supply VS is less than the first reference value, the controller 220 can determine that the surge protection circuit 210 is in a damaged state.

When the controller 220 determines that the surge protection circuit 210 is in a damaged state, the controller 220 generates a damaged signal Dsig to the wireless module 230 and causes the wireless module 230 to upload the damaged signal Dsig to the remote server RSE, in which the wireless module 230 For example, the damaged signal Dsig can be uploaded to the remote server RSE via the network to monitor and report the usage status of the surge protection circuit. It should be noted that the remote server RSE can be, for example, a cloud storage or cloud server, and the network can be, for example, a local area network (Local Area Network, LAN) or the Internet (internet). No restrictions.

On the other hand, in this embodiment, the power conversion circuit 240 is coupled to the surge protection circuit 210, receives the live line voltage L and the neutral line voltage N, and converts the live line voltage L and the neutral line voltage N to the first power source The voltage and the second power supply voltage are used to provide the first power supply voltage to the controller 220 and the wireless module 230 as the power supply, and to provide the second power supply voltage to the switching circuit 250 as the power supply, wherein the first power supply voltage is less than the second voltage. To further explain, after receiving the live voltage L and the neutral voltage N of the single-phase AC power supply, the power conversion circuit 240 can rectify the live voltage L and the neutral voltage N to generate the first power voltage as a DC voltage and The second power supply voltage and provide the first power supply voltage to the voltage regulator 270, so that the voltage regulator 270 regulates the first power supply voltage to provide the first power supply voltage to the controller 220 and the wireless through the voltage regulator 270 Module 230. In addition, the power conversion circuit 240 may provide the second power voltage to the switching circuit 250.

It is worth mentioning that the switch circuit 250 of this embodiment can be coupled to the controller 220 for being turned on or off according to the usage state of the surge protection circuit 210, and the indicator circuit 260 is coupled to the switch circuit 250 To indicate the usage status of the surge protection circuit. For example, when the surge protection circuit 210 is in a normal state, the controller 220 can generate a control signal Rbsig to the switch circuit 250, and the switch circuit 250 is turned on according to the control signal Rbsig, so that the indicator circuit 260 performs an instruction.

To further explain, in this embodiment, the sampling circuit 212 can receive the voltage value of the power supply VS from the surge absorption circuit 211, and perform a step-down operation and a full-wave rectification operation to correspondingly generate a sampling voltage with a smaller voltage value Rasig, in addition to the first reference value (for example, 5Vac described in the embodiment of FIG. 1) in the controller 220 of this embodiment, a second reference value (for example, 80Vac) and a third reference value (for example, 60Vac), a fourth reference value (for example, 280Vac), and a fifth reference value (for example, 260Vac), wherein the first reference value to the fifth reference value are the fourth reference value, the fifth reference voltage in order from large to small , Value second reference value, third reference value and first reference value. It should be noted that for ease of description, the present invention provides five reference values here as an exemplary embodiment. However, the present invention does not limit the number and size of reference values. Those with ordinary knowledge in the art may Adjust according to the actual application.

According to this, the surge protection device 200 of this embodiment can be compared with the representative value of the voltage of the power supply VS corresponding to the sampling voltage Rasig by the controller 220 and a plurality of different reference values, so that the surge protection device 200 operates in different modes. For example, when the representative value of the voltage of the power supply VS corresponding to the sampling signal Rasig is less than the third reference value (For example, 60Vac), and greater than the first reference value (for example, 5Vac), the surge protection device 200 can operate in a low-voltage shutdown mode, indicating that the surge protection device 200 is in a low-voltage state but is not damaged (i.e. sampling (The voltage value of the power supply VS corresponding to the signal Rasig is not lower than the first reference value), the controller 220 can provide the control signal Rbsig with the disabled voltage level to the switch circuit 250, so that the switch circuit 250 is controlled according to the control signal Rbsig When it is disconnected, the indicator circuit 260 is in an extinguished state according to the switch circuit 250 being disconnected.

When the voltage value of the power supply VS corresponding to the sampling signal Rasig is greater than or equal to the second reference value (for example, 80Vac), the surge protection device 200 can operate in a low-voltage startup mode, and the controller 220 can provide the enable The voltage level control signal Rbsig is sent to the switch circuit 250, so that the switch circuit 250 is turned on according to the control signal Rbsig, so that the indicator circuit 260 performs the indicating action, and can provide the output live wire voltage to the output live wire terminal Lo, and provide the output neutral Line voltage to output neutral terminal No.

In addition, when the voltage value of the power supply VS corresponding to the sampling signal Rasig is greater than or equal to the fourth reference value (for example, 280Vac), the surge protection device 200 operates in an overvoltage shutdown mode, indicating that the surge protection circuit 210 receives If the voltage value of the received power supply VS is too high, the controller 220 can provide the control signal Rbsig with the disabled voltage level to the switch circuit 250, so that the switch circuit 250 is disconnected according to the control signal Rbsig, and the indicator circuit 260 can The switch circuit 250 is turned off according to the off state. When the voltage value of the power supply VS corresponding to the sampling signal Rasig decreases from greater than the fifth reference value (for example, 260Vac) to the fifth reference value, the surge protection When the device 200 operates in an overvoltage recovery mode, the controller 220 can provide a control signal Rbsig with an enable voltage level to the switch circuit 250, so that the switch circuit 250 is turned on according to the control signal Rbsig, so that the indicator circuit 260 performs an instruction Action, and can provide the output live wire voltage to the output live wire terminal Lo, and provide the output neutral wire voltage to the output neutral wire terminal No.

In this way, the surge protection device 200 of this embodiment can determine the current surge protection circuit 210 by comparing five different reference values with the representative value of the voltage of the power supply VS corresponding to the sampled voltage Rasig at this time The operating state (ie, normal state or damaged state), and the operating mode of the surge protection device 200 when the surge protection circuit 210 is in a normal state can be adjusted according to the representative value of the power supply VS corresponding to the sampled voltage Rasig To achieve the purpose of protecting the back-end circuit equipment in the case of overvoltage or low voltage.

Please refer to FIG. 3, which is a schematic diagram of a circuit block of a surge protection device according to another embodiment of the invention. In this embodiment, the surge protection device 300 includes a surge protection circuit 310, a controller 320, a wireless module 330, a power conversion circuit 340, a switch circuit 350, an indicator circuit 360, and a voltage regulator 370. The surge protection circuit 310 includes a surge absorption circuit 311 and a sampling circuit 312, and is used to receive the live line voltage L, the neutral line voltage N, and the ground line voltage G in the power supply VS, that is, the power supply VS in this embodiment Single-phase AC power provided by the mains system. In detail, the surge absorption circuit 311 includes a live terminal LEN, a neutral terminal NEN, a ground terminal GEN, surge protection elements VR1 to VR3, and fuse elements F1 to F2. The live terminal LEN is used to receive the live line voltage L, and the neutral terminal NEN is used to receive the neutral line voltage N, The ground terminal GEN is used to receive the ground voltage G.

The first end of the fuse element F1 is coupled to the live terminal LEN, and the second end of the fuse element F1 is coupled to the first end of the surge protection element VR1. The surge protection element VR1 is coupled between the second end of the fuse element F1 and the neutral terminal NEN. The surge protection element VR2 is coupled between the second end of the fuse element F1 and the ground terminal GEN. The first end of the fuse element F2 is coupled to the neutral terminal NEN, and the second end of the fuse element F2 is coupled to the first end of the surge protection element VR3. The surge protection element VR3 is coupled between the second end of the fuse element F2 and the ground terminal GEN. In addition, the surge absorption circuit 311 provides the first live line voltage L1 to the sampling circuit 312 via the fuse element F1, and provides the first neutral line voltage N1 to the sampling circuit 312 via the fuse element F2.

Specifically, the surge absorption circuit 311 of this embodiment can perform a surge protection operation on the power supply VS through the surge protection elements VR1~VR3, that is, the surge protection elements VR1~VR3 of this embodiment can be connected in parallel to the commercial power. The line voltage L, neutral line voltage N and ground line voltage G of the single-phase AC power provided by the system are used to suppress the surge of the single-phase AC power (for example, the surge or (Overvoltage surges induced by lightning strikes on the power lines of the mains system), wherein the surge protection elements VR1~VR3 may be, for example, varistors, but the invention is not limited thereto.

In addition, it is worth mentioning that in this embodiment, the surge protection elements VR1 and VR2 are connected in series with the fuse element F1, and the surge protection element VR1 is connected in series with the fuse element F2, so that when the surge protection elements VR1 and VR2 are abnormal (For example is When the surge voltage is too high to damage the surge protection elements VR1 and VR2), the fuse element F1 is melted due to the high temperature of the excessive current to block the current path of the surge protection elements VR1 and VR2. Similarly, when the surge protection element VR3 is abnormal (for example, when the surge voltage is too high to damage the surge protection element VR3), the fuse element F2 is melted due to the high temperature of the excessive current to block the surge The current path of the protection element VR3. In this way, the surge absorption circuit of the present invention can block the current path of the surge protection elements VR1~VR3 by fusing the fuse elements F1, F2, thereby protecting the surge protection device and the back-end circuit equipment from being avoided The purpose of being damaged by a direct shock.

On the other hand, the sampling circuit 312 includes a transformer T1, diodes D3 to D7, capacitors C1 to C2, resistors R1 to R5, and an acceptor diode ZD1. The first end and the second end of the primary side of the transformer T1 receive the first live line voltage L1 and the first neutral line voltage N1, respectively. The first end of the secondary side of the transformer T1 is coupled to the anode and the second side of the diode D3 The cathode of the pole body D4 and the second end of the secondary side of the transformer T1 are simultaneously coupled to the anode of the diode D5 and the cathode of the diode D6. The cathode of the diode D3 is coupled to the cathode of the diode D5. The anode of the diode D4 is simultaneously coupled to the anode of the diode D6 and the reference ground voltage GND. The first end of the resistor R1 is coupled to the cathode of the diode D3, and the second end of the resistor R1 is coupled to the reference ground voltage GND.

In addition, the anode of the diode D7 is coupled to the cathode of the diode D5, and the cathode of the diode D7 is simultaneously coupled to the first end of the capacitor C1, the first end of the resistor R2, and the first end of the resistor R3. The second terminal of the capacitor C1 is coupled to the reference ground voltage GND. The second terminal of the resistor R2 is also coupled to the reference ground voltage GND. resistance The first end of R4 is simultaneously coupled to the controller 320, the first end of the capacitor C2, and the second end of the resistor R3. The second end of the resistor R4 is coupled to the first end of the resistor R5. The second end of the resistor R5 is coupled to the reference ground voltage GND. The first end of the capacitor C2 is coupled to the cathode of the diode ZD1, and the second end of the capacitor C2 is coupled to the reference ground voltage GND. The anode of the diode ZD1 is coupled to the reference ground voltage GND.

In this way, the sampling circuit 312 of this embodiment can be isolated by the primary side and the secondary side of the transformer T1, and the first live wire voltage L1 and the first The neutral line voltage N1 is stepped down to generate an AC voltage in the secondary measurement of the transformer T1, and passes through the bridge full-wave rectifier circuit formed by the diodes D3 to D7, the resistors R1 to R2, and the capacitor C1. A live line voltage L1 and the first neutral line voltage N1 are rectified into a DC voltage, and the DC voltage is divided by resistors R3 to R5 to generate a sampling signal Rasig.

In addition, the controller 320 receives the power supply voltage Vcc, the sampling signal Rasig and the reference ground voltage GND, and is used to generate the control signal Rbsig and the damage signal Dsig. The wireless module receives the power supply voltage Vcc and the reference ground voltage GND, and receives the damaged signal Dsig to upload to the remote server RSE. The power conversion circuit 340 includes resistors R6 to R9, diodes ZD2 to ZD5, diodes D8 to D11, capacitors C3 to C5, and voltage regulator 370. The first terminal of the capacitor C3 receives the live voltage L from the live terminal LEN and is coupled to the first terminal of the resistor R6. The second terminal of the capacitor C3 is simultaneously coupled to the anode of the diode D8 and the cathode of the diode D9 . The second end of the resistor R6 is coupled to the first end of the resistor R7. The second end of the resistor R7 is coupled to the first end of the resistor R8. The second terminal of the resistor R8 is coupled to the second terminal of the capacitor C3. The cathode of the diode D8 is coupled to the cathode of the diode D10. The anode of the diode D9 is simultaneously coupled to the anode of the diode D11 and the reference ground voltage GND. The anode of the diode D10 receives the neutral line voltage N from the neutral terminal NEN, and is coupled to the cathode of the diode D11.

The first end of the capacitor C4 is simultaneously coupled to the cathode of the diode D8 and the first end of the resistor R9, and the second end of the capacitor C4 is coupled to the reference ground voltage GND. The first terminal of the capacitor C5 is simultaneously coupled to the second terminal of the resistor R9 and the cathode of the diode ZD2. The second terminal of the capacitor C5 is coupled to the reference ground voltage GND. The cathode of the Zener diode ZD2 is coupled to the first end of the voltage regulator 370 and the switching circuit 350, and the anode of the Zener diode ZD2 is coupled to the cathode of the Zener diode ZD3. The anode of the Zener diode ZD3 is coupled to the cathode of the Zener diode ZD4. The anode of the Zener diode ZD4 is coupled to the cathode of the Zener diode ZD5. The anode of the diode ZD5 is coupled to the reference ground voltage GND. The first terminal of the voltage regulator 370 is coupled to the first terminal of the capacitor C5, the second terminal of the voltage regulator 370 is coupled to the reference ground voltage GND, and the third terminal of the voltage regulator 370 is coupled to The controller 320 and the wireless module 330 provide a power supply voltage Vcc.

It should be noted that in this embodiment, the voltage regulator 370 is provided in the power conversion circuit 340. In other words, the voltage regulator 370 of the present invention may be provided in the power conversion circuit 340, or it may be It is provided separately from the power conversion circuit 340 (for example, the voltage regulator 270 of FIG. 2 ), which is not limited by the present invention.

In detail, the power conversion circuit 340 of this embodiment can receive The live voltage L and the neutral voltage N of the live terminal LEN and the neutral terminal NEN are coupled through a capacitor C3 to form a bridge-type full-wave rectifier circuit formed by diodes D8~D11 to convert the live voltage L and the neutral The voltage N is rectified into a DC voltage, and the voltage ripple of the DC voltage is reduced through the capacitors C4~C5 and the resistor R6, and the voltage regulator formed by connecting the diodes ZD2~ZD4 in series to generate the power supply voltage VDD is provided to the switching circuit 350. On the other hand, the power conversion circuit 340 can provide the power supply voltage VDD to the voltage regulator 370, so that the voltage regulator 370 steps down the power supply voltage VDD to generate the power supply voltage Vcc, and provides the power supply voltage Vcc to the controller 320 and Wireless module 330.

In addition, the switch circuit 350 includes resistors R10 to R11, a capacitor C6, a diode D12, a transistor Q1, and a relay switch (Relay) RL1. The first terminal of the resistor R10 receives the control signal Rbsig from the controller 320, and the second terminal of the resistor R10 is coupled to the first terminal of the resistor R11, the first terminal of the capacitor C6, and the control terminal of the transistor Q1. The second end of the resistor R11 is coupled to the reference ground voltage GND. The second terminal of the capacitor C6 is coupled to the reference ground voltage GND. The first end of the transistor Q1 is coupled to the anode of the diode D12, and the second end of the transistor Q1 is coupled to the reference ground voltage GND. The anode of the diode D12 is coupled to the second end of the first side of the relay switch RL1, and the cathode of the diode D12 is coupled to the first end of the first side of the relay switch RL1 and the power conversion circuit 340. The first terminal on the first side of the relay switch RL1 receives the power supply voltage VDD, the first terminal on the second side of the relay switch RL1 is coupled to the indicator circuit 360, and the second terminal on the second side of the relay switch RL1 Receive the live voltage L from the live terminal LEN. Incidentally, the transistor Q1 of this embodiment may be made of metal oxygen, for example. Semiconductor field-effect transistor (MOSFET) or bipolar junction transistor (BJT) to implement, in order to simplify the description, the present invention uses bipolar junction transistor as an exemplary embodiment to illustrate, but Those with ordinary knowledge in the art can make adjustments according to the actual application, and the invention is not limited here.

In detail, after the controller 320 determines the state of the surge protection circuit 310 according to the sampling signal Rasig (for example, a normal state or a damaged state), it can generate a control signal to the switch circuit 350, and the switch circuit 350 receives the signal from the controller 320 After the control signal Rbsig can be divided through the resistors R10 and R11 to provide the driving voltage to the control terminal of the transistor Q1, and then the transistor Q1 is turned on, pulling the voltage of the second terminal on the first side of the relay switch RL1 As low as the reference ground voltage GND, the first side of the relay switch RL1 can receive the power supply voltage VDD, and the second side of the relay switch RL1 is turned on according to the power supply voltage VDD, so that the live line voltage L can be provided to the output live line terminal Lo can be used as the output line voltage.

The indicator circuit 360 includes diodes D13~D14, light-emitting diodes LED1, and resistors R12~R14. The anode of the diode D13 receives the neutral line voltage N from the neutral terminal NEN, and the cathode of the diode D13 is coupled to the first end of the resistor R12 and the anode of the light emitting diode LED1. The second end of the resistor R12 is coupled to the first end of the resistor R13. The second end of the resistor R13 is coupled to the first end of the resistor R14. The second end of the resistor R14 is coupled to the cathode of the diode D14. The anode of the diode D14 is coupled to the output live terminal Lo. The cathode of the light emitting diode LED1 is coupled to the output neutral terminal No. Specifically, the indicator circuit 360 of this embodiment may provide the live voltage L to the output live terminal Lo according to whether the switch circuit 350 is turned on to generate the output live voltage Turn on the light-emitting diode LED1 to make the indicator circuit 360 emit light to indicate that the current surge protection device 300 is in a normal state.

It should be noted that the surge protection device 300 of this embodiment determines whether the surge protection circuit 310 is damaged, various operation modes when the surge protection circuit 310 is in a normal state, and when the surge protection circuit 310 is in a damaged state The method of reporting by the wireless module 330 is similar to the foregoing embodiments of FIG. 1 and FIG. 2. Those skilled in the art can complete the surge of the embodiment of FIG. 3 according to the description of the foregoing embodiments of FIG. 1 and FIG. 2. The protection device 300 is not repeated here.

In summary, the surge protection device of the present invention can perform a surge protection operation on a power supply by a plurality of surge protection elements in the surge protection circuit, and the surge protection circuit can generate a sampling signal corresponding to the power supply to The controller compares the representative value of the voltage of the power supply corresponding to the sampled signal with the size of the first reference value to determine the usage state of the surge protection circuit at this time, and the controller can determine when the surge protection circuit is damaged Generate a damage signal to enable the wireless module to upload the damage signal to the remote server in real time to report the damage status of the surge protection circuit, so as to let the user know the damage status of the surge protection circuit in the first time , And can perform immediate maintenance and repair actions on the surge protection device.

Although the present invention has been disclosed as above with examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be subject to the scope defined in the appended patent application.

100: Surge protection device

110: Surge protection circuit

120: controller

130: wireless module

Dsig: damaged signal

Rasig: sampled signal

RSE: remote server

VS: power supply

Claims (17)

A surge protection device includes: a surge protection circuit with a plurality of surge protection elements. The surge protection circuit receives a power supply and generates a sampling signal according to the power supply; a controller is coupled to the surge protection device Wave protection circuit, the controller compares the representative value of the voltage of the power supply corresponding to the sampled signal with a first reference value to determine a use state of the surge protection circuit; a wireless module is coupled to the controller , And correspondingly transmit the usage status to a remote server; a surge absorption circuit with the surge protection elements to perform a surge protection action against the power supply; and a sampling circuit, coupled to the surge absorption The circuit performs a step-down operation and a full-wave rectification operation on the power supply subjected to the surge protection action to generate the sampling signal. The surge protection device as described in item 1 of the patent application scope, wherein the use state of the surge protection circuit includes a normal state and a damaged state, when the controller determines that the surge protection circuit is in the damaged state, The controller generates a damage signal to the wireless module, and causes the wireless module to upload the damage signal to the remote server. The surge protection device as described in item 2 of the patent application scope, wherein when the voltage value of the power supply corresponding to the sampling signal is less than the first reference value, the controller determines that the surge protection circuit is in the damaged state, The controller generates The damaged signal in the damaged state is sent to the wireless module, so that the wireless module uploads the damaged signal to the remote server. The surge protection device as described in item 3 of the patent application range, wherein when the voltage value of the power supply corresponding to the sampling signal is greater than the first reference value, the controller determines that the surge protection circuit is in a normal state. The surge protection device as described in item 4 of the patent application scope, wherein the surge protection device further comprises: a switch circuit, coupled to the controller, for conducting according to the damaged state of the surge protection circuit or Disconnected; and an indicator circuit, coupled to the switch circuit, for indicating the use state of the surge protection circuit, wherein, when the surge protection circuit is in a normal state, the controller generates a control signal, The switch circuit is turned on according to the control signal, so that the indicator circuit performs an indicating action. The surge protection device as described in item 5 of the patent application scope, wherein the controller further has a second reference value, a third reference value, a fourth reference value and a fifth reference value, wherein the first The reference value to the fifth reference value are the fourth reference value, the fifth reference value, the second reference value, the third reference value, and the first reference value in ascending order. The surge protection device as described in item 6 of the patent application scope, wherein when the voltage value of the power supply corresponding to the sampled signal is less than the third reference value and greater than the At the first reference value, the surge protection device operates in a low-voltage shutdown mode, and the controller provides the control signal for the disabled voltage level to the switch circuit, so that the switch circuit is disconnected according to the control signal. The surge protection device as described in item 6 of the patent application scope, wherein when the voltage value of the power supply corresponding to the sampled signal is greater than or equal to the second reference value, the surge protection device operates in a low-voltage startup mode, The controller provides the control signal to enable the voltage level to the switch circuit, so that the switch circuit is turned on according to the control signal, so that the indicator circuit performs an indicating action. The surge protection device as described in item 6 of the patent application scope, wherein when the voltage value of the power supply corresponding to the sampled signal is greater than or equal to the fourth reference voltage value, the surge protection device operates in an overvoltage shutdown In the mode, the controller provides the control signal for the disabled voltage level to the switch circuit, so that the switch circuit is turned off according to the control signal. The surge protection device as described in item 6 of the patent application scope, wherein when the voltage value of the power supply corresponding to the sampled signal decreases from greater than the fifth reference value to the fifth reference value, the surge protection device Operating in an overvoltage recovery mode, the controller provides the control signal to enable the voltage level to the switch circuit, so that the switch circuit is turned on according to the control signal, so that the indicator circuit performs an indicating action. The surge protection device as described in item 1 of the patent application scope, wherein the surge protection circuit further has a plurality of fuse elements, and the fuse elements are coupled to the surge protection elements, When the surge protection elements are damaged by the power supply surge and are in the damaged state, the fuse elements are melted according to the power supply surge to block the current path of the surge protection elements. The surge protection device as described in item 11 of the patent application scope, wherein the power supply is a single-phase AC power supply provided by a commercial power system. The surge protection device as described in item 12 of the patent application range, wherein the surge absorption circuit is used to receive a live line voltage, a neutral line voltage and a ground line voltage of the single-phase AC power supply to generate a first A live line voltage and a first neutral line voltage, and the surge protection action is performed on the single-phase AC power supply through the surge protection elements, wherein the sampling circuit responds to the first live line voltage and the first neutral line The line voltage performs a step-down operation and a full-wave rectification operation to generate the sampling signal. The surge protection device as claimed in item 13 of the patent application scope, wherein the surge absorption circuit includes: a live terminal for receiving the live voltage; a neutral terminal for receiving the neutral line voltage; one The ground terminal is used to receive the ground voltage; a first fuse element whose first end is coupled to the live terminal; a first surge protection element coupled to the second end of the first fuse element and Between the neutral terminal; a second surge protection element, coupled between the second end of the first fuse element and the ground terminal; a second fuse element, the first end of which is coupled to the Neutral end; and A third surge protection element is coupled between the second end of the second fuse element and the ground end. The surge protection device as described in item 13 of the patent application scope, wherein the surge protection device further comprises: a power conversion circuit coupled to the surge protection circuit, receiving the live voltage and the neutral voltage, and Converting the live line voltage and the neutral line voltage into a first power supply voltage and a second power supply voltage to provide the first power supply voltage to the controller and the wireless module, and provide the second power supply voltage to the A switching circuit, wherein the first power supply voltage is less than the second power supply voltage. The surge protection device as described in item 1 of the patent application scope, wherein the fuse elements are thermal fuses. The surge protection device as described in item 1 of the patent application scope, wherein the surge protection elements are varistors.

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