Overcurrent protection module and power supply

Abstract

The utility model relates to an overcurrent protection module and a power supply. The overcurrent protection module comprises a power supply module, a logic judgment module, a three-phase overcurrent protection module connected in series between a three-phase power supply input port and a three-phase power supply output port, and a single-phase overcurrent protection module connected in series between the three-phase power supply input port and a single-phase power supply output port. The DC acquisition module is connected in series between the DC switching power supply and the DC output port, and the input end of the DC switching power supply is connected with the three-phase power supply input port through the single-phase overcurrent protection module; wherein the output end of the power supply module is respectively connected with the three-phase overcurrent protection module, the single-phase overcurrent protection module, the DC acquisition module and the logic judgment module; the logic judgment module is connected with the three-phase overcurrent protection module, the single-phase overcurrent protection module and the DC acquisition module. By adopting the overcurrent protection module, the power supply safety requirements of alternating current and direct current can be ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power supply, in particular to an overcurrent protection module and a power supply. BACKGROUND

[0002] In modern electronic devices and technical fields, including industrial automation, communication facilities, medical devices, and consumer electronics, etc., it is crucial to ensure the stable operation of the devices and their internal sub-modules.

[0003] With the increasing complexity of technology, current load management has become a critical issue. Due to changes in working environment, power fluctuations, or component aging, some sub-modules in the device may encounter overcurrent or overload situations, which not only causes damage to the sub-modules, but also affects the normal operation of the entire system, and even causes safety accidents. CONTENT OF THE INVENTION

[0004] Therefore, it is necessary to provide an overcurrent protection module and a power supply.

[0005] In a first aspect, the present application provides an overcurrent protection module applied to a power supply, the power supply comprising a three-phase power input port, a three-phase power output port, a single-phase power output port, a DC output port, and a DC switching power supply.

[0006] The overcurrent protection module comprises a power supply module, a logic judgment module, a three-phase overcurrent protection module connected in series between the three-phase power input port and the three-phase power output port, a single-phase overcurrent protection module connected in series between the three-phase power input port and the single-phase power output port, and a DC acquisition module connected in series between the DC switching power supply and the DC output port, wherein the input end of the DC switching power supply is connected to the three-phase power input port through the single-phase overcurrent protection module.

[0007] The output end of the power supply module is connected to the three-phase overcurrent protection module, the single-phase overcurrent protection module, the DC acquisition module, and the logic judgment module, respectively.

[0008] The logic judgment module is connected to the three-phase overcurrent protection module, the single-phase overcurrent protection module, and the DC acquisition module, respectively.

[0009] In one embodiment, the three-phase overcurrent protection module comprises three overcurrent protection branches connected in series between the three-phase power input port and the three-phase power output port, and each overcurrent protection branch is connected in series with a first current acquisition circuit and a first controlled switch circuit in sequence, wherein the logic judgment module is connected to the first current acquisition circuit and the first controlled switch circuit.

[0010] And / or,

[0011] The single-phase overcurrent protection module comprises two overcurrent protection branches connected in series between the three-phase power input port and the single-phase power output port, and each overcurrent protection branch is connected with the second current collection circuit and the second controlled switch circuit in series;

[0012] and / or,

[0013] The DC collection module comprises a third current collection circuit connected in series between the DC switching power supply and the DC output port.

[0014] and / or,

[0015] The power supply module comprises an AC conversion circuit and a DC conversion circuit, the AC conversion circuit is connected with the three-phase power input port, the first controlled switch circuit, the second controlled switch circuit and the DC conversion circuit respectively, and the DC conversion circuit is connected with the first collection circuit, the second current collection circuit and the third current collection circuit respectively.

[0016] In one embodiment, at least one of the first current collection circuit, the second current collection circuit and the third current collection circuit has the following circuit: a current sensor, a first resistor, a second resistor, a third resistor, a first capacitor and a second capacitor.

[0017] The VCC pin of the current sensor is connected with the DC conversion circuit, the first end of the first resistor is connected with the first NC pin of the current sensor, the second end of the first resistor is connected with the first end of the first capacitor, the first end of the first capacitor is also connected with the VCC pin of the current sensor, the second end of the second capacitor is connected with the second NC pin of the current sensor, and the second NC pin is grounded; the second resistor and the second capacitor are connected in series between the VOUT pin and the second NC pin of the current sensor; the third resistor is connected in series between the FILTER pin and the GND pin of the current sensor, and the GND pin is grounded.

[0018] In the first current collection circuit, the IP+ pin of the current sensor of each overcurrent protection branch is connected with each corresponding phase of the three-phase input port, and the IP- pin of the current sensor is connected with each corresponding first controlled switch circuit.

[0019] In the second current collection circuit, the IP+ pin of the current sensor of each overcurrent protection branch is connected with any phase and the zero line of the three-phase input port, and the IP- pin of the current sensor is connected with each second controlled switch circuit.

[0020] In the third current collection circuit, the IP+ pin of the current sensor is used for connecting the output end of the DC switching power supply, and the IP- pin of the current sensor is used for connecting the DC output port.

[0021] In one of the embodiments, at least one of the first controlled switch circuit and the second controlled switch circuit has a circuit comprising a first diode, a fourth resistor, a first triode and a relay;

[0022] The first end of the relay is connected with the cathode of the first diode, the second end of the relay is connected with the anode of the first diode, the cathode of the diode is further connected with the AC conversion circuit, the anode of the diode is further connected with the collector of the first triode, the base of the first triode is connected with the logic judgment module through the fourth resistor, and the emitter of the first triode is grounded.

[0023] The first contact and the second contact of the relay in each first controlled switch circuit are correspondingly connected in series between each first current collection circuit and each phase power output port of the three-phase power output port.

[0024] The first contact and the second contact of the relay in each second controlled switch circuit are correspondingly connected in series between each second current collection circuit and the firewire output port or the zero line output port of the single-phase power output port.

[0025] In one of the embodiments, the AC conversion circuit comprises a power module, a third capacitor, a fourth capacitor, a fifth capacitor, an inductor and a second diode.

[0026] The firewire pin of the power module is used for connecting one of the three-phase power input ports, the zero line pin of the power module is used for connecting the zero line of the three-phase power input port, the first end of the third capacitor is connected with the positive output pin of the power module, the first end of the fourth capacitor is connected with the first end of the third capacitor, the inductor is connected in series between the first end of the fourth capacitor and the first end of the fifth capacitor, the negative output pin of the power module, the second end of the third capacitor, the second end of the fourth capacitor and the second end of the fifth capacitor are grounded, the anode of the second diode is connected with the first end of the fifth capacitor, and the cathode of the second diode is connected with the DC conversion circuit, the first controlled switch circuit and the second controlled switch circuit respectively.

[0027] In one of the embodiments, the DC conversion circuit comprises a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a sixth capacitor, a seventh capacitor and a power conversion chip.

[0028] In this circuit, the first terminal of the fifth resistor is connected to the AC conversion circuit, the first terminal of the sixth capacitor is connected to the second terminal of the fifth resistor, and the second terminal of the sixth capacitor is grounded. The first terminal of the power conversion chip is connected to the first terminal of the sixth capacitor, and the second terminal of the power conversion chip is connected to the first terminal of the sixth resistor. The second terminal of the sixth resistor is connected to the first current acquisition circuit, the second current acquisition circuit, the third current acquisition circuit, and the logic judgment module, respectively. The second terminal of the power conversion chip is also connected to the first terminal of the seventh resistor, which is used to connect to other electrical circuits besides the first current acquisition circuit, the second current acquisition circuit, the third current acquisition circuit, and the logic judgment module. The second terminal of the power conversion chip is connected to the first terminal of the seventh capacitor, and the second terminal of the seventh capacitor is grounded through the eighth and ninth resistors, respectively.

[0029] In one embodiment, the power supply further includes an over-temperature signal output port, and the overcurrent protection module further includes a temperature acquisition module and an over-temperature alarm module;

[0030] The temperature acquisition module is connected to the logic judgment module.

[0031] The over-temperature alarm module is connected in series between the logic judgment module and the over-temperature signal output port.

[0032] In one embodiment, the over-temperature alarm module includes: an eleventh resistor, a twelfth resistor, a third diode, a second transistor, and a transient voltage suppressor.

[0033] The anode of the third diode is used to connect to the power supply module. The cathode of the third diode is connected to the first end of the eleventh resistor. The second end of the eleventh resistor is connected to the first end of the transient voltage suppressor and the collector of the second transistor. The second end of the eleventh resistor is also connected to the over-temperature signal output port through a connector. The second end of the transient voltage suppressor is grounded to the emitter of the second transistor. The base of the second transistor is connected to the logic judgment module through the twelfth resistor.

[0034] In one embodiment, the overcurrent protection module further includes:

[0035] LED display module;

[0036] The LED display module is connected to the power supply module and the logic judgment module, respectively.

[0037] Secondly, this application also provides a power supply, which includes:

[0038] Three-phase power input port, three-phase power output port, single-phase power output port, DC output port and DC switching power supply, three-phase filter, single-phase filter and overcurrent protection module as described in the above embodiments.

[0039] The three-phase filter is connected in series between the three-phase overcurrent protection module and the three-phase power output port, and the single-phase filter is connected in series between the single-phase overcurrent protection module and the single-phase power output port.

[0040] The above-mentioned overcurrent protection module and power supply have at least the following beneficial effects:

[0041] This invention provides a comprehensive overcurrent protection design that effectively monitors and manages the current load of three-phase, single-phase, and DC power supplies. By acquiring the current from each circuit in real time and transmitting the data to the logic judgment module for comparison, it can respond quickly when an overcurrent phenomenon is detected, cutting off the corresponding circuit to prevent equipment damage. This not only improves the safety and reliability of the power supply system but also extends the service life of equipment and reduces downtime caused by overcurrent failures, thus providing more stable and secure power protection in various applications. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a schematic diagram of the overcurrent protection module in one embodiment;

[0044] Figure 2 A schematic diagram of the overcurrent protection module in another embodiment;

[0045] Figure 3 This is a schematic diagram of the current acquisition circuit and the controlled switch circuit in one embodiment;

[0046] Figure 4 This is a schematic diagram of the AC conversion circuit and DC conversion circuit in one embodiment;

[0047] Figure 5 This is a schematic diagram of the over-temperature alarm module in one embodiment. Detailed Implementation

[0048] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0050] It is understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0051] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0052] It is understandable that "at least one" refers to one or more, and "multiple" refers to two or more. "At least a part of an element" refers to part or all of an element.

[0053] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0054] In one exemplary embodiment, such as Figure 1As shown, this application provides an overcurrent protection module applied to a power supply. The power supply includes a three-phase power input port 300, a three-phase power output port 301, a single-phase power output port 302, a DC output port 303, and a DC switching power supply 304. The overcurrent protection module includes: a power supply module 2, a logic judgment module 4, a three-phase overcurrent protection module 6 connected in series between the three-phase power input port 300 and the three-phase power output port 301, and a module connected in series between the three-phase power input port 302 and the single-phase power output port 303. The power supply module 2 consists of a single-phase overcurrent protection module 8 and a DC acquisition module 10 connected in series between the DC switching power supply 304 and the DC output port 303. The input terminal of the DC switching power supply 304 is connected to the three-phase power input port 300 through the single-phase overcurrent protection module 8. The output terminal of the power supply module 2 is connected to the three-phase overcurrent protection module 6, the single-phase overcurrent protection module 8, the DC acquisition module 10, and the logic judgment module 4. The logic judgment module 4 is connected to the three-phase overcurrent protection module 6, the single-phase overcurrent protection module 8, and the DC acquisition module 10.

[0055] The logic judgment module 4 can be composed of electronic components such as a microcontroller, resistors, capacitors, and crystal oscillators. Specifically, the microcontroller can be a microcontroller with ADC sampling function, such as the GD32F103 series microcontroller. Besides the microcontroller and its peripheral circuits, the logic judgment module 4 can also be a comparator or other devices. The DC switching power supply 304 can be a 24V chassis-type switching power supply, such as the A-250GE-24 type switching power supply, or a 12V chassis-type switching power supply, such as the A-60GB-12 type switching power supply.

[0056] For example, the power supply module 2 draws power from the three-phase power input port 300, and after AC-DC conversion, boosting or bucking, it supplies power to the logic judgment module 4, the three-phase overcurrent protection module 6, the single-phase overcurrent protection module 8, and the DC acquisition module 10. The three-phase overcurrent protection module 6, the single-phase overcurrent protection module 8, and the DC acquisition module 10 collect the current of each circuit in real time and transmit the collected current to the logic judgment module 4, so that the logic judgment module 4 can determine whether an overcurrent phenomenon has occurred based on the collected current. If an overcurrent phenomenon is determined to have occurred, the logic judgment module 4 outputs the corresponding control signal to the corresponding overcurrent protection module to disconnect the loop between the input port and the output port. For example, the three-phase overcurrent protection module 6 is used to collect the three-phase AC power (including phases L1, L2, and L3) input from the three-phase power input port 300 in real time and transmit it to the logic judgment module 4. The logic judgment module 4 can compare it with the corresponding overcurrent threshold. When the three-phase AC power is less than the corresponding overcurrent threshold, the logic judgment module 4 outputs a conduction control signal (such as a high-level signal) to the three-phase overcurrent protection module 6 to conduct the loop between the three-phase power input port 300 and the three-phase power output port 301, so as to realize the normal output of the three-phase AC power. When the three-phase AC power is greater than the corresponding overcurrent threshold, the logic judgment module 4 outputs a shutdown control signal (such as a low-level signal) to the three-phase overcurrent protection module 6 to cut off the loop between the three-phase power input port 300 and the three-phase power output port 301, so as to realize overcurrent protection and protect the three-phase electrical equipment. For example, the single-phase overcurrent protection module 8 is used to collect the current of phase L1 and phase N of the three-phase AC power input from the three-phase power input port 300 in real time and transmit it to the logic judgment module 4. The logic judgment module 4 can compare it with the corresponding overcurrent threshold. When the single-phase AC power is less than the corresponding overcurrent threshold, the logic judgment module 4 outputs a conduction control signal (such as a high-level signal) to the single-phase overcurrent protection module 8 to conduct the loop between the three-phase power input port 300 and the single-phase power output port 302, so as to realize the normal output of the single-phase AC power. When the single-phase AC power is greater than the corresponding overcurrent threshold, the logic judgment module 4 outputs a shutdown control signal (such as a low-level signal) to the single-phase overcurrent protection module 8 to cut off the loop between the three-phase power input port 300 and the single-phase power output port 302, so as to realize overcurrent protection and protect the single-phase electrical equipment.For example, when the circuit between the three-phase power input port 300 and the single-phase power output port 302 is conducting, the single-phase power output from the single-phase overcurrent protection module 8 can also be converted into DC voltage by the DC switching power supply 304 and output to the DC output port 303. The DC acquisition module 10, connected in series between the DC switching power supply 304 and the DC output port 303, is used to acquire the current output by the DC switching power supply 304 in real time and transmit it to the logic judgment module 4. The logic judgment module 4 can compare it with the corresponding overcurrent threshold; if the current output by the DC switching power supply 304 is less than the corresponding overcurrent threshold... The logic judgment module 4 outputs a conduction control signal (such as a high-level signal) to the single-phase overcurrent protection module 8 to keep the circuit between the three-phase power input port 300 and the single-phase power output port 302 in conduction, so as to realize the normal output of DC power. When the current output by the DC switching power supply 304 is greater than the corresponding overcurrent threshold, the logic judgment module 4 outputs a shutdown control signal (such as a low-level signal) to the single-phase overcurrent protection module 8 to cut off the circuit between the three-phase power input port 300 and the single-phase power output port 302, so as to cut off the output of the DC switching power supply 304, thereby realizing overcurrent protection and protecting DC electrical equipment.

[0057] The aforementioned overcurrent protection module provides a comprehensive overcurrent protection design, effectively monitoring and managing the current load of three-phase, single-phase, and DC power supplies. By acquiring current data from each circuit in real time and transmitting it to the logic judgment module for comparison, it can respond quickly upon detecting an overcurrent event, cutting off the corresponding circuit to prevent equipment damage. This not only improves the safety and reliability of the power supply system but also extends the service life of equipment and reduces downtime caused by overcurrent faults, thus providing more stable and secure power protection in various applications.

[0058] In an exemplary embodiment, the three-phase overcurrent protection module 6 includes three overcurrent protection branches connected in series between the three-phase power input port 300 and the three-phase power output port 301, with a first current acquisition circuit and a first controlled switch circuit connected in series in each overcurrent protection branch; wherein, the logic judgment module 4 is connected to the first current acquisition circuit and the first controlled switch circuit respectively; and / or, the single-phase overcurrent protection module 8 includes two overcurrent protection branches connected in series between the three-phase power input port 300 and the single-phase power output port 302, with a second current acquisition circuit connected in series in each overcurrent protection branch. The second controlled switch circuit; the logic judgment module 4 is connected to the second current acquisition circuit and the second controlled switch circuit respectively; and / or, the DC acquisition module 10 includes a third current acquisition circuit connected in series between the DC switching power supply 304 and the DC output port 303; and / or, the power supply module 2 includes an AC conversion circuit 22 and a DC conversion circuit 24, the AC conversion circuit 22 is connected to the three-phase power input port 300, the first controlled switch circuit, the second controlled switch circuit and the DC conversion circuit 24 respectively, and the DC conversion circuit 24 is connected to the first acquisition circuit, the second current acquisition circuit and the third current acquisition circuit respectively.

[0059] Among them, such as Figure 2 As shown, the three-phase overcurrent protection module 6 includes three first current acquisition circuits 62 and three first controlled switch circuits 64. The overcurrent protection branches are connected in parallel, and each overcurrent protection branch is connected in series with a first current acquisition circuit and a first controlled switch circuit. The first current acquisition circuits on each overcurrent protection branch are respectively connected to phases L1, L2 and L3 of the three-phase AC power to acquire the three-phase AC power (including phases L1, L2 and L3) input from the three-phase power input port 300 in real time. The single-phase overcurrent protection module 8 includes two overcurrent protection branches, each containing two second current acquisition circuits 82 and two second controlled switch circuits 84. The overcurrent protection branches are connected in parallel. One of the overcurrent protection branches is connected to the L1 phase of the three-phase power input port 300, and the other is connected to the N phase of the three-phase power input port 300, so as to collect the current of the L1 and N phases of the three-phase AC power input from the three-phase power input port 300 in real time.

[0060] For example, such as Figure 2As shown, in some embodiments, the three-phase overcurrent protection module 6 includes three first current acquisition circuits 62 and three first controlled switch circuits 64. The three first current acquisition circuits 62 acquire the current of phases L1, L2, and L3 respectively and transmit it to the logic judgment module 4. When the current of any phase exceeds the corresponding overcurrent threshold, the logic judgment module 4 simultaneously outputs a shutdown control signal (such as a low-level signal) to the three first controlled switch circuits 64 to disconnect the loop between the three-phase power input port 300 and the three-phase power output port 301, thereby achieving overcurrent protection. In other embodiments, the single-phase overcurrent protection module 8 includes two second current acquisition circuits 82 and two second controlled switch circuits 84. The two second current acquisition circuits 82 acquire the current of phases L and N respectively and transmit it to the logic judgment module 4. When the logic judgment module 4 determines that the single-phase current exceeds the corresponding overcurrent threshold, it simultaneously outputs a shutdown control signal to the two second controlled switch circuits 84 to disconnect the loop between the three-phase power input port 300 and the single-phase power output port 302. In some embodiments, the DC output port 303 can be a 24VDC output port 3031, and correspondingly, the DC switching power supply 30 can be a 24V switching power supply 3041. The third acquisition circuit is connected in series between the 24VDC output port 3031 and the 24V switching power supply 3041 to acquire the current output by the 24V switching power supply 3041 and transmit it to the logic judgment module 4. When the logic judgment module 4 determines that the current output by the 24V switching power supply 3041 is greater than the corresponding overcurrent threshold, it outputs a shutdown control signal to the two second controlled switch circuits 84 to disconnect the loop between the three-phase power input port 300 and the 24VDC output port 3031. DC output port 303 can also be 12VDC output port 3032. Correspondingly, DC switching power supply 30 can be 12V switching power supply 3042. The third acquisition circuit is connected in series between 12VDC output port 3032 and 12V switching power supply 3042 to acquire the current output by 12V switching power supply 3042 and transmit it to logic judgment module 4. When logic judgment module 4 determines that the current output by 12V switching power supply 3042 is greater than the corresponding overcurrent threshold, it outputs a shutdown control signal to the two second controlled switch circuits 84 to disconnect the loop between three-phase power input port 300 and 12VDC output port 3032.DC output port 303 can simultaneously include a 24VDC output port 3031 and a 12VDC output port 3032. Correspondingly, DC switching power supply 304 can also simultaneously include a 24V switching power supply 3041 and a 12V switching power supply 3042. In this case, the third current acquisition circuit can be selectively connected in series between the 24V switching power supply 3041 and the 24VDC output port 3031, or it can be selectively connected in series between the 12V switching power supply 3042 and the 12VDC output port 3032, selectively acquiring the output current and transmitting it. The signal is sent to the logic judgment module 4. When the logic judgment module 4 determines that the output current of either the 24V switching power supply 3041 or the 12V switching power supply 3042 is greater than the corresponding overcurrent threshold, it outputs a shutdown control signal to the two second controlled switch circuits 84 to disconnect the loop between the three-phase power input port 300 and the 24VDC output port 3031 and the 12VDC output port 3032. Based on this, the amount of data sampling and the amount of data processing by the logic judgment module can be reduced, while making the circuit structure simpler.

[0061] In some embodiments, the power supply module 2 includes an AC conversion circuit 22 and a DC conversion circuit 24. The AC conversion circuit 22 converts three-phase AC power into DC power (e.g., 12V) to power the first current acquisition circuit, the second current acquisition circuit, and the third current acquisition circuit. Furthermore, the DC conversion circuit 24 steps down the DC power output from the AC conversion circuit 22 to output low-voltage DC power (e.g., 3V) to power the logic judgment module 4, the first controlled switch circuit, the second controlled switch circuit, and the third controlled switch circuit.

[0062] In this embodiment, the current acquisition circuit and controlled switch circuit on each path can monitor the current in real time and quickly cut off the corresponding circuit when an overcurrent is detected, effectively preventing equipment damage caused by overload. Furthermore, the power supply module employs AC and DC conversion circuits to ensure stable power supply to the entire system, further improving system reliability and safety. This not only enhances the overall performance of the power system but also significantly increases the durability and lifespan of the equipment, providing safer and more reliable power protection for various application scenarios.

[0063] In one exemplary embodiment, such as Figure 3As shown, at least one of the first current acquisition circuit, the second current acquisition circuit, and the third current acquisition circuit includes the following circuit: current sensor U3, first resistor R10, second resistor R82, third resistor R15, first capacitor C9, and second capacitor C8; wherein, the VCC pin of the current sensor U3 is connected to the DC-DC conversion circuit 24, the first end of the first resistor R10 is connected to the first NC pin of the current sensor U3, the second end of the first resistor R10 is connected to the first end of the first capacitor C9, the first end of the first capacitor C9 is also connected to the VCC pin of the current sensor U3, the second end of the second capacitor C8 is connected to the second NC pin of the current sensor U3, and the second NC pin is grounded; the second resistor R82 and the second capacitor C8 are connected in series with the VOUT pin of the current sensor U3 and the second NC pin, respectively. Between the NC pins; the third resistor R15 is connected in series between the FILTER pin and the GND pin of the current sensor U3, with the GND pin grounded; in the first current acquisition circuit, the IP+ pin of the current sensor U3 in each overcurrent protection branch is connected to the corresponding phase of the three-phase input port, and the IP- pin of the current sensor U3 is connected to the corresponding first controlled switch circuit; in the second current acquisition circuit, the IP+ pin of the current sensor U3 in each overcurrent protection branch is connected to any phase and the neutral line of the three-phase input port, and the IP- pin of the current sensor U3 is connected to the corresponding second controlled switch circuit; in the third current acquisition circuit, the IP+ pin of the current sensor U3 is used to connect to the output terminal of the DC switching power supply 304, and the IP- pin of the current sensor U3 is used to connect to the DC output port 303.

[0064] The individual electronic components, their connections, and the interactions between them can be directly understood by those skilled in the art from... Figure 3 As we have learned, we will not elaborate further here. The specific selection of each electronic component in the diagram is for illustrative purposes only and is not intended to be limiting.

[0065] For example, such as Figure 3As shown in circuit 622, for the current sensor U3 in the first current acquisition circuit, the current of each phase of the three-phase AC power (L1 phase, L2 phase, and L3 phase) is input to the current sensor U3 through the corresponding IP+ pin. After processing by the current sensor U3, the current is output from the VOUT pin of the current sensor U3 to the logic judgment module 4 to complete the acquisition of the three-phase AC power. For the current sensor U3 in the second current acquisition circuit, the L1 phase current and the N phase current of the three-phase AC power are input to the current sensor U3 through the corresponding IP+ pin. After processing by the current sensor U3, the current is output from the VOUT pin of the current sensor U3 to the logic judgment module 4 to complete the acquisition of the single-phase AC power. For the current sensor U3 in the third current acquisition circuit, the current output by the DC switching power supply 304 is input to the current sensor U3 through the IP+ pin. After processing by the current sensor U3, the current is output from the VOUT pin of the current sensor U3 to the logic judgment module 4 to complete the acquisition of the current output by the DC switching power supply 304.

[0066] In this embodiment, accurate current acquisition of three-phase, single-phase, and DC power supplies is achieved through the use of current sensors and related circuit design. This design enables real-time monitoring of current in each circuit and transmits the data to a logic judgment module for analysis and processing. Upon detecting an overcurrent condition, the system can quickly respond and disconnect the corresponding circuit, effectively preventing equipment damage due to overload. Furthermore, through reasonable circuit layout and component selection, the accuracy and reliability of current acquisition are ensured, thereby improving the safety and stability of the entire power system and providing a more reliable and efficient power protection solution for various application scenarios.

[0067] In one exemplary embodiment, such as Figure 3 As shown, at least one of the first and second controlled switch circuits includes the following circuit: a first diode DZ2, a fourth resistor R14, a first transistor Q2, and a relay K2; wherein, the first terminal of the relay K2 is connected to the cathode of the first diode DZ2, the second terminal of the relay K2 is connected to the anode of the first diode DZ2, the cathode of the diode is also connected to the AC conversion circuit 22, the anode of the diode is also connected to the collector of the first transistor Q2, the base of the first transistor Q2 is connected to the logic judgment module 4 through the fourth resistor R14, and the emitter of the first transistor Q2 is grounded; the first and second contacts of the relay K2 in each of the first controlled switch circuits are connected in series between each of the first current acquisition circuits and each phase power output port in the three-phase power output port 301; the first and second contacts of the relay K2 in each of the second controlled switch circuits are connected in series between each of the second current acquisition circuits and the live wire output port or the neutral wire output port in the single-phase power output port 302.

[0068] The individual electronic components, their connections, and the interactions between them can be directly understood by those skilled in the art from... Figure 3 As we have learned, we will not elaborate further here. The specific selection of each electronic component in the diagram is for illustrative purposes only and is not intended to be limiting.

[0069] For example, such as Figure 3 As shown in circuit 644, taking the first controlled switch circuit as an example, if the logic judgment module 4 determines that the current in any phase of the three-phase AC power is greater than the corresponding overcurrent threshold, then the output shutdown control signal (such as a low-level signal) is input to the base of the first transistor Q2 in the first controlled switch circuit through the fourth resistor R14, so that the first transistor Q2 is in the off state, thereby preventing the first contact and the second contact of the relay K2 from connecting, thus disconnecting the loop between the three-phase power input port 300 and the three-phase power output port 301, and realizing overcurrent protection. The control of the relay K2 in the second controlled switch circuit can be referred to the description of the control logic of the first controlled switch circuit in the aforementioned embodiment and this embodiment, and will not be repeated here.

[0070] In this embodiment, a controlled switching circuit composed of relays and transistors is used to achieve precise control of the three-phase and single-phase power supply output paths. When the logic judgment module detects an overcurrent condition, it can quickly issue a shutdown signal to disconnect the relay in the controlled switching circuit, thereby promptly cutting off the faulty circuit and effectively preventing equipment damage caused by overload. This not only improves the system's response speed and reliability but also ensures the safe operation of the power system, providing a more efficient and reliable overcurrent protection mechanism for various application scenarios.

[0071] In one exemplary embodiment, such as Figure 4 As shown, the AC conversion circuit 22 includes: a power module P1, a third capacitor C4, a fourth capacitor C1, a fifth capacitor C2, an inductor L1, and a second diode D1. The live wire pin of the power module P1 is connected to one phase of the three-phase power input port 300, and the neutral wire pin of the power module P1 is connected to the neutral wire of the three-phase power input port 300. The first end of the third capacitor C4 is connected to the positive output pin of the power module P1, and the first end of the fourth capacitor C1 is connected to the first end of the third capacitor C4. The inductor L1 is connected in series between the first end of the fourth capacitor C1 and the first end of the fifth capacitor C2. The negative output pin of the power module P1, the second end of the third capacitor C4, the second end of the fourth capacitor C1, and the second end of the fifth capacitor C2 are all grounded. The anode of the second diode D1 is connected to the first end of the fifth capacitor C2, and the cathode of the second diode D1 is connected to the DC conversion circuit 24, the first controlled switch circuit, and the second controlled switch circuit, respectively.

[0072] The individual electronic components, their connections, and the interactions between them can be directly understood by those skilled in the art from... Figure 4 As we have learned, we will not elaborate further here. The specific selection of each electronic component in the diagram is for illustrative purposes only and is not intended to be limiting.

[0073] For example, any phase current in the three-phase AC power is converted into 12V low-voltage DC power after passing through power module P1, third capacitor C4, fourth capacitor C1, fifth capacitor C2, inductor L1 and second diode D1, to power the first controlled switch circuit and the second controlled switch circuit.

[0074] In this embodiment, the aforementioned AC conversion circuit converts three-phase AC power into stable 12V low-voltage DC power, providing a reliable power supply for key components such as the controlled switching circuit. This circuit utilizes capacitors and inductors for filtering and smoothing, combined with diodes for rectification, ensuring the stability and reliability of the output voltage. This not only improves the system's power supply efficiency but also enhances the overall circuit's anti-interference capability, thus providing more stable and reliable power support for the entire overcurrent protection system, further improving the system's safety and durability.

[0075] In one exemplary embodiment, such as Figure 4 As shown, the DC-DC conversion circuit 24 includes: a fifth resistor R2, a sixth resistor R1, a seventh resistor R3, an eighth resistor R7, a ninth resistor R12, a sixth capacitor C5, a seventh capacitor C3, and a power conversion chip U1; wherein, the first end of the fifth resistor R2 is connected to the AC conversion circuit 22, the first end of the sixth capacitor C5 is connected to the second end of the fifth resistor R2, and the second end of the sixth capacitor C5 is grounded; the first end of the power conversion chip U1 is connected to the first end of the sixth capacitor C5, the second end of the power conversion chip U1 is connected to the first end of the sixth resistor R1, the second end of the sixth resistor R1 is connected to the first current acquisition circuit, the second current acquisition circuit, the third current acquisition circuit, and the logic judgment module 4, respectively, the second end of the power conversion chip U1 is also connected to the first end of the seventh resistor R3, and the second end of the seventh resistor R3 is used to connect other power circuits besides the first current acquisition circuit, the second current acquisition circuit, the third current acquisition circuit, and the logic judgment module 4; the second end of the power conversion chip U1 is connected to the first end of the seventh capacitor C3, and the second end of the seventh capacitor C3 is grounded through the eighth resistor R7 and the ninth resistor R12.

[0076] The individual electronic components, their connections, and the interactions between them can be directly understood by those skilled in the art from... Figure 4 As we have learned, we will not elaborate further here. The specific selection of each electronic component in the diagram is for illustrative purposes only and is not intended to be limiting.

[0077] For example, the 12V low-voltage DC output from the AC conversion circuit 22 is converted into 3.3V low-voltage DC after passing through the fifth resistor R2, the sixth resistor R1, the seventh resistor R3, the eighth resistor R7, the ninth resistor R12, the sixth capacitor C5, the seventh capacitor C3 and the power conversion chip U1, to power the logic judgment module 4, the first current acquisition circuit, the second current acquisition circuit and the third current acquisition circuit, as well as other power-consuming circuits.

[0078] In this embodiment, by using a power conversion chip and related circuit components, 12V DC power is efficiently converted into 3.3V low-voltage DC power, providing a stable and accurate power supply for the logic judgment module, current acquisition circuit and other power-consuming circuits. This not only ensures the normal operation of each key component, but also improves the overall energy efficiency and stability of the system, reduces electromagnetic interference, and thus enhances the reliability and performance of the entire overcurrent protection system.

[0079] In one exemplary embodiment, such as Figure 2 As shown, the power supply also includes an over-temperature signal output port 305, and the overcurrent protection module also includes a temperature acquisition module 12 and an over-temperature alarm module 14; wherein, the temperature acquisition module 12 is connected to the logic judgment module 4; the over-temperature alarm module 14 is connected in series between the logic judgment module 4 and the over-temperature signal output port 305.

[0080] The temperature acquisition module 12 can be composed of a thermistor and its peripheral circuits.

[0081] For example, the temperature acquisition module 12 monitors the temperature of the power supply in real time. When the temperature of the power supply exceeds the threshold temperature, an alarm drive signal is output to the over-temperature alarm module 14, so that the over-temperature alarm module 14 outputs an over-temperature signal to the over-temperature signal output port 305, thereby enabling the alarm device connected to the over-temperature signal output port 305 to perform an alarm action when it receives the over-temperature signal output port 305.

[0082] In this embodiment, by introducing a temperature acquisition module and an over-temperature alarm module, real-time monitoring of the power supply temperature is achieved. When the temperature exceeds the threshold temperature, the alarm device connected to the over-temperature signal output port can promptly issue an alarm signal to remind operators to take appropriate measures to prevent equipment damage or safety hazards caused by overheating.

[0083] In one exemplary embodiment, such as Figure 5As shown, the over-temperature alarm module 14 includes: an eleventh resistor R75, a twelfth resistor R76, a third diode D14, a second transistor Q16, and a transient voltage suppressor (TVS) 12. The anode of the third diode D14 is connected to the power supply module 2, the cathode of the third diode D14 is connected to the first terminal of the eleventh resistor R75, the second terminal of the eleventh resistor R75 is connected to the first terminal of the transient voltage suppressor (TVS) 12 and the collector of the second transistor Q16, the second terminal of the eleventh resistor R75 is also connected to the over-temperature signal output port 305 via connector CON10, the second terminal of the transient voltage suppressor (TVS) 12 is grounded to the emitter of the second transistor Q16, and the base of the second transistor Q16 is connected to the logic judgment module 4 via the twelfth resistor R76.

[0084] The individual electronic components, their connections, and the interactions between them can be directly understood by those skilled in the art from... Figure 5 As we have learned, we will not elaborate further here. The specific selection of each electronic component in the diagram is for illustrative purposes only and is not intended to be limiting.

[0085] For example, when the temperature of the power supply exceeds the threshold temperature, the logic judgment module 4 outputs an alarm drive signal (such as a high level) to the base of the second transistor Q16, so that the second transistor Q16 is turned on, thereby causing the 12V power supply voltage output from the power supply module 2 to flow to ground through the third diode D14, the eleventh resistor R75 and the third diode D14 to form a loop, thereby outputting an over-temperature signal through the connector CON10.

[0086] In this embodiment, by designing an over-temperature alarm module that includes diodes, resistors, transistors, and transient voltage suppressors, an over-temperature signal can be quickly output to an external alarm device when the power supply temperature is detected to exceed the threshold. This not only provides real-time temperature monitoring but also issues timely alarms to remind operators to take measures, effectively preventing equipment damage or safety accidents caused by overheating, thereby improving the safety and reliability of the system.

[0087] In one exemplary embodiment, such as Figure 2 As shown, the overcurrent protection module also includes an LED display module 16. The LED display module 16 is connected to the power supply module 2 and the logic judgment module 4, respectively.

[0088] The LED display module 16 can be composed of multiple sets of digital tubes and their peripheral circuits, and can be used for current display, overcurrent alarm display, and overtemperature alarm display. In one embodiment, the overcurrent protection module also includes a button module 306. When the LED display module 16 is used in conjunction with the button module 306, it can also display the setting of the overcurrent threshold.

[0089] In this embodiment, by integrating an LED display module and a button circuit, not only can the current value, overcurrent alarm, and overtemperature alarm be displayed in real time, but the user can also intuitively set and adjust the overcurrent threshold. This design significantly improves the user-friendliness and operability of the system, enabling operators to more easily monitor the system status and make necessary adjustments, thereby enhancing the overall functionality and practicality of the system and improving the safety and maintenance efficiency of the equipment.

[0090] In one exemplary embodiment, this application also provides a power supply, such as... Figure 2 As shown, the power supply includes: a three-phase power input port 300, a three-phase power output port 301, a single-phase power output port 302, a DC output port 303, a DC switching power supply 304, a three-phase filter 307, a single-phase filter 308, and an overcurrent protection module as described in the above embodiment; wherein, the three-phase filter 307 is connected in series between the three-phase overcurrent protection module 6 and the three-phase power output port 301, and the single-phase filter 308 is connected in series between the single-phase overcurrent protection module 8 and the single-phase power output port 302.

[0091] Among them, the three-phase filter 307 can be a CW12B-40A-S type three-phase three-wire filter; the single-phase filter 308 can be a CW4L2-6A-SR type single-phase filter 308.

[0092] For example, such as Figure 2 As shown, by adding a three-phase filter 307 between the three-phase overcurrent protection module 6 and the three-phase power output port 301, and adding a single-phase filter 308 between the single-phase overcurrent protection module 8 and the single-phase power output port 302, electromagnetic interference and noise at the power input can be reduced, ensuring the purity of the output power and improving power quality. Meanwhile, the DC output port 303 and the DC switching power supply 304 provide a stable DC power supply, which can power equipment in different application scenarios, such as laser power supply scenarios.

[0093] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0094] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0095] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. An overcurrent protection module, characterized by The application is applied to a power supply, which comprises a three-phase power input port, a three-phase power output port, a single-phase power output port, a DC output port and a DC switching power supply; The overcurrent protection module comprises a power supply module, a logic judgment module, a three-phase overcurrent protection module connected between the three-phase power input port and the three-phase power output port, a single-phase overcurrent protection module connected between the three-phase power input port and the single-phase power output port, and a DC acquisition module connected between the DC switching power supply and the DC output port, and the input end of the DC switching power supply is connected with the three-phase power input port through the single-phase overcurrent protection module; The output end of the power supply module is connected with the three-phase overcurrent protection module, the single-phase overcurrent protection module, the DC acquisition module and the logic judgment module respectively; The logic judgment module is connected with the three-phase overcurrent protection module, the single-phase overcurrent protection module and the DC acquisition module respectively.

2. The overcurrent protection module of claim 1, wherein, The three-phase overcurrent protection module comprises three overcurrent protection branches connected between the three-phase power input port and the three-phase power output port, and each overcurrent protection branch is connected with a first current acquisition circuit and a first controlled switch circuit in sequence; wherein the logic judgment module is connected with the first current acquisition circuit and the first controlled switch circuit respectively; and / or, The single-phase overcurrent protection module comprises two overcurrent protection branches connected between the three-phase power input port and the single-phase power output port in sequence, and each overcurrent protection branch is connected with a second current acquisition circuit and a second controlled switch circuit in sequence; the logic judgment module is connected with the second current acquisition circuit and the second controlled switch circuit respectively; and / or, The DC acquisition module comprises a third current acquisition circuit connected between the DC switching power supply and the DC output port; and / or, The power supply module comprises an AC conversion circuit and a DC conversion circuit, the AC conversion circuit is connected with the three-phase power input port, the first controlled switch circuit, the second controlled switch circuit and the DC conversion circuit respectively, and the DC conversion circuit is connected with the first current acquisition circuit, the second current acquisition circuit and the third current acquisition circuit respectively.

3. The overcurrent protection module of claim 2, wherein, At least one of the first current acquisition circuit, the second current acquisition circuit and the third current acquisition circuit has a circuit comprising a current sensor, a first resistor, a second resistor, a third resistor, a first capacitor and a second capacitor. The VCC pin of the current sensor is connected with the direct current conversion circuit, the first end of the first resistor is connected with the first NC pin of the current sensor, the second end of the first resistor is connected with the first end of the first capacitor, the first end of the first capacitor is also connected with the VCC pin of the current sensor, the second end of the second capacitor is connected with the second NC pin of the current sensor, and the second NC pin is grounded; the second resistor and the second capacitor are connected in sequence between the VOUT pin of the current sensor and the second NC pin; the third resistor is connected in sequence between the FILTER pin of the current sensor and the GND pin, and the GND pin is grounded; The IP+ pin of the current sensor in each over-current protection branch of the first current collection circuit is connected with the corresponding phase of the three-phase power input port, and the IP- pin of the current sensor is connected with each first controlled switch circuit; The IP+ pin of the current sensor in each over-current protection branch of the second current collection circuit is connected with any phase and the zero line of the three-phase power input port, and the IP- pin of the current sensor is connected with each second controlled switch circuit; The IP+ pin of the current sensor in the third current collection circuit is used for connecting the output end of the DC switch power supply, and the IP- pin of the current sensor is used for connecting the DC output port.

4. The overcurrent protection module of claim 2, wherein, At least one of the first controlled switch circuit and the second controlled switch circuit has the following circuit: a first diode, a fourth resistor, a first triode and a relay; The first end of the relay is connected with the cathode of the first diode, the second end of the relay is connected with the anode of the first diode, the cathode of the diode is also connected with the alternating current conversion circuit, the anode of the diode is also connected with the collector of the first triode, the base of the first triode is connected with the logic judgment module through the fourth resistor, and the emitter of the first triode is grounded; The first contact and the second contact of the relay in each first controlled switch circuit are connected in sequence between each first current collection circuit and each phase power output port of the three-phase power output port; The first contact and the second contact of the relay in each second controlled switch circuit are connected in sequence between each second current collection circuit and the live wire output port or the zero line output port of the single-phase power output port.

5. The overcurrent protection module of claim 2, wherein, The alternating current conversion circuit comprises a power module, a third capacitor, a fourth capacitor, a fifth capacitor, an inductor and a second diode. The live wire pin of the power supply module is used for connecting one phase of the three-phase power input port, the zero line pin of the power supply module is used for connecting the zero line of the three-phase power input port, the first end of the third capacitor is connected with the positive output pin of the power supply module, the first end of the fourth capacitor is connected with the first end of the third capacitor, the inductor is connected in series between the first end of the fourth capacitor and the first end of the fifth capacitor, the negative output pin of the power supply module, the second end of the third capacitor, the second end of the fourth capacitor and the second end of the fifth capacitor are grounded, the anode of the second diode is connected with the first end of the fifth capacitor, and the cathode of the second diode is connected with the direct current conversion circuit, the first controlled switch circuit and the second controlled switch circuit respectively.

6. The overcurrent protection module of claim 2, wherein, The direct current conversion circuit comprises a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a sixth capacitor, a seventh capacitor and a power conversion chip. The first end of the fifth resistor is connected with the alternating current conversion circuit, the first end of the sixth capacitor is connected with the second end of the fifth resistor, and the second end of the sixth capacitor is grounded; the first end of the power conversion chip is connected with the first end of the sixth capacitor, the second end of the power conversion chip is connected with the first end of the sixth resistor, the second end of the sixth resistor is connected with the first current collection circuit, the second current collection circuit, the third current collection circuit and the logic judgment module respectively, the second end of the power conversion chip is also connected with the first end of the seventh resistor, and the second end of the seventh resistor is used for connecting other power consumption circuits except the first current collection circuit, the second current collection circuit, the third current collection circuit and the logic judgment module; the second end of the power conversion chip is connected with the first end of the seventh capacitor, and the second end of the seventh capacitor is grounded through the eighth resistor and the ninth resistor respectively.

7. The overcurrent protection module of claim 1, wherein, The power supply further comprises an over-temperature signal output port, and the over-current protection module further comprises a temperature collection module and an over-temperature alarm module. The temperature collection module is connected with the logic judgment module. The over-temperature alarm module is connected in series between the logic judgment module and the over-temperature signal output port.

8. The overcurrent protection module of claim 7, wherein, The over-temperature alarm module comprises an eleventh resistor, a twelfth resistor, a third diode, a second triode and a transient voltage suppression tube. The anode of the third diode is used for connecting the power supply module, the cathode of the third diode is connected with the first end of the eleventh resistor, the second end of the eleventh resistor is connected with the first end of the transient voltage suppression tube and the collector of the second triode respectively, the second end of the eleventh resistor is also connected with the over-temperature signal output port through a connector, the second end of the transient voltage suppression tube is grounded with the emitter of the second triode, and the base of the second triode is connected with the logic judgment module through the twelfth resistor.

9. The overcurrent protection module of claim 1, wherein, The over-current protection module further comprises: an LED display module. The LED display module is connected with the power supply module and the logic judgment module respectively.

10. A power supply, characterized by, The power supply comprises: The three-phase power input port, the three-phase power output port, the single-phase power output port, the DC output port and the DC switching power supply, the three-phase filter, the single-phase filter and the overcurrent protection module as claimed in any one of claims 1-9; The three-phase filter is connected in series between the three-phase overcurrent protection module and the three-phase power output port, and the single-phase filter is connected in series between the single-phase overcurrent protection module and the single-phase power output port.

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