Mining intrinsically safe power supply module

Abstract

The utility model provides a mining intrinsically safe power supply module, which comprises an input protection unit, the input protection unit comprises a first diode, a second diode and a transient voltage suppressor tube, the anode of the first diode is used as the input end of the power supply module, and the cathode of the first diode is connected with the anode of the second diode; the cathode of the second diode is connected with the first end of the transient voltage suppressor, and the second end of the transient voltage suppressor is grounded; the first end of the DC-to-DC unit is connected with the first end of the transient voltage suppression tube, the second end of the DC-to-DC unit serves as the output end of the power module, and the DC-to-DC unit is used for converting the first voltage of the first end into the second voltage of the second end. According to the mining intrinsically safe power supply module disclosed by the invention, stable voltage conversion of the DC-DC unit can be ensured, so that safe and reliable power supply of the power supply is realized, and the production requirements of a coal mine are met.

Description

Technical Field

[0001] The present disclosure relates to the technical field of power modules, and in particular to an intrinsically safe power module for mining. Background Art

[0002] With the increasing mechanization and automation of coal mines, intrinsically safe electrical equipment is increasingly used in underground monitoring, communication, signaling, instrumentation, and automation systems. Intrinsically safe power supplies are a type of intrinsically safe electrical equipment whose maximum output voltage and current are both intrinsically safe. Ensuring the safety and reliability of power supplies to meet the needs of coal mine production is a pressing issue. Summary of the Invention

[0003] The present disclosure aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, the purpose of the present disclosure is to provide an intrinsically safe power supply module for mining.

[0005] To achieve the above-mentioned objectives, the present disclosure provides an intrinsically safe power supply module for mining, comprising: an input protection unit, wherein the input protection unit comprises: a first diode, a second diode and a transient voltage suppression tube, wherein the anode of the first diode serves as the input end of the power supply module, and the cathode of the first diode is connected to the anode of the second diode, the cathode of the second diode is connected to the first end of the transient voltage suppression tube, and the second end of the transient voltage suppression tube is grounded; a DC-DC unit, wherein the first end of the DC-DC unit is connected to the first end of the transient voltage suppression tube, and the second end of the DC-DC unit serves as the output end of the power supply module, and the DC-DC unit is used to convert a first voltage at the first end into a second voltage at the second end.

[0006] Optionally, the input protection unit also includes: a positive temperature coefficient thermistor, which is connected in series between the first end of the DC-DC unit and the first end of the transient voltage suppressor, and the first end of the positive temperature coefficient thermistor is connected to the first end of the transient voltage suppressor, and the second end of the positive temperature coefficient thermistor is connected to the first end of the DC-DC unit.

[0007] Optionally, the power supply module also includes: a slow start unit, which is connected in series between the first end of the DC-DC unit and the first end of the transient voltage suppression tube, and the first end of the slow start unit is connected to the first end of the transient voltage suppression tube, and the second end of the slow start unit is connected to the first end of the DC-DC unit.

[0008] Optionally, the slow start unit includes: a first resistor, a first capacitor, a P-type MOS tube and a second resistor, the first end of the first resistor is connected to the first end of the transient voltage suppression tube, and the first end of the first capacitor is connected to the first end of the first resistor, the second end of the first capacitor is connected to the first end of the second resistor, the source of the MOS tube is connected to the first end of the first capacitor, the drain of the MOS tube is connected to the first end of the DC-DC unit, the gate of the MOS tube is connected to the second end of the first capacitor, the first end of the second resistor is connected to the gate of the MOS tube, and the second end of the second resistor is grounded.

[0009] Optionally, the DC-DC unit includes: a voltage conversion chip, the input end of the voltage conversion chip is connected to the first end of the transient voltage suppression tube, and the ground end of the voltage conversion chip is grounded; a second capacitor, the first end of the second capacitor is connected to the input end of the voltage conversion chip, and the second end of the second capacitor is grounded; a third capacitor, the first end of the third capacitor is connected to the bootstrap end of the voltage conversion chip, and the second end of the third capacitor is connected to the phase end of the voltage conversion chip; an inductor, the first end of the inductor is connected to the second end of the third capacitor; a fourth capacitor, the first end of the fourth capacitor is connected to the second end of the inductor, and the second end of the fourth capacitor is grounded, and the first end of the fourth capacitor serves as the output end of the power supply module.

[0010] Optionally, the DC-DC unit also includes: a third resistor, the first end of the third resistor is connected to the first end of the fourth capacitor, and the second end of the third resistor is connected to the feedback end of the voltage conversion chip, and the first end of the third resistor serves as the output end of the power supply module; a fourth resistor, the first end of the fourth resistor is connected to the second end of the third resistor, and the second end of the fourth resistor is grounded.

[0011] Optionally, the DC-DC unit further includes: a third diode, a cathode of the third diode being connected to the second end of the third capacitor and the first end of the inductor respectively, and an anode of the third diode being grounded.

[0012] Optionally, the DC-DC unit further includes: an electrolytic capacitor, a first end of the electrolytic capacitor is connected to the second end of the inductor, and the second end of the electrolytic capacitor is grounded.

[0013] Optionally, the power supply module also includes: an output protection unit, the output protection unit including: a first voltage-stabilizing diode, a first thyristor, a fifth resistor and a sixth resistor, the negative pole of the first voltage-stabilizing diode is connected to the second end of the DC-DC unit, and the positive pole of the first voltage-stabilizing diode is respectively connected to the first end of the fifth resistor and the first end of the sixth resistor, the anode of the first thyristor is connected to the negative pole of the first voltage-stabilizing diode, the cathode of the first thyristor is connected to the second end of the fifth resistor, the second end of the fifth resistor is grounded, the control pole of the first thyristor is connected to the second end of the sixth resistor, and the anode of the first thyristor serves as the output end of the power supply module.

[0014] Optionally, the output protection unit also includes: a second voltage-stabilizing diode, a second thyristor, a seventh resistor and an eighth resistor, the negative electrode of the second voltage-stabilizing diode is connected to the anode of the first thyristor, and the positive electrode of the second voltage-stabilizing diode is connected to the first end of the seventh resistor and the first end of the eighth resistor respectively, the anode of the second thyristor is connected to the negative electrode of the second voltage-stabilizing diode, the cathode of the second thyristor is connected to the second end of the seventh resistor, the second end of the seventh resistor is grounded, and the control electrode of the second thyristor is connected to the second end of the eighth resistor.

[0015] The technical solution provided by the present disclosure may have the following beneficial effects:

[0016] By setting up the DC-DC unit, the power supply module can utilize the conversion function of the DC-DC unit to convert the input first voltage into a second voltage, thereby meeting the load's usage requirements. At the same time, by sequentially connecting the first diode and the second diode in series at the first end of the DC-DC unit, the power supply module can utilize the unidirectional conduction characteristics of the first diode and the unidirectional conduction characteristics of the second diode to achieve two-stage reverse protection, thereby protecting the DC-DC unit from damage when the power supply is reversed. Moreover, by setting up the transient voltage suppression tube, when an overvoltage occurs at the input end of the power supply module, the conduction of the transient voltage suppression tube can be used to guide the excess voltage to the ground, preventing the overvoltage from propagating to the DC-DC unit. Therefore, through the two-stage reverse protection and overvoltage protection of the input protection unit, the stable voltage conversion of the DC-DC unit can be guaranteed, thereby achieving safe and reliable power supply, meeting the production needs of the coal mine.

[0017] Additional aspects and advantages of the present disclosure will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0019] Figure 1 This is a circuit diagram of an intrinsically safe power supply module for mining proposed in one embodiment of the present disclosure;

[0020] As shown in the figure: 1. Input protection unit, 2. Soft start unit, 3. DC to DC unit, 4. Output protection unit;

[0021] R1, a first resistor, R2, a second resistor, R3, a third resistor, R4, a fourth resistor, R5, a fifth resistor, R6, a sixth resistor, R7, a seventh resistor, and R8, an eighth resistor;

[0022] C1, first capacitor, C2, second capacitor, C3, third capacitor, C4, fourth capacitor, E1, electrolytic capacitor;

[0023] D1, the first diode, D2, the second diode, D3, the third diode, TVS1, the transient voltage suppressor, ZD1, the first voltage regulator, ZD2, the second voltage regulator;

[0024] Q1, MOS tube, Q2, first thyristor, Q3, second thyristor;

[0025] P1, positive temperature coefficient thermistor;

[0026] V1, voltage conversion chip;

[0027] L1, inductor. DETAILED DESCRIPTION

[0028] The following describes in detail embodiments of the present disclosure, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present disclosure and are not to be construed as limiting the present disclosure. On the contrary, the embodiments of the present disclosure include all variations, modifications, and equivalents that fall within the spirit and scope of the appended claims.

[0029] like Figure 1As shown, an embodiment of the present disclosure proposes an intrinsically safe power supply module for mining, including: an input protection unit 1 and a DC-DC unit 3. The input protection unit 1 includes: a first diode D1, a second diode D2 and a transient voltage suppressor TVS1. The anode of the first diode D1 serves as the input end of the power supply module, and the cathode of the first diode D1 is connected to the anode of the second diode D2, the cathode of the second diode D2 is connected to the first end of the transient voltage suppressor TVS1, and the second end of the transient voltage suppressor TVS1 is grounded. The first end of the DC-DC unit 3 is connected to the first end of the transient voltage suppressor TVS1, and the second end of the DC-DC unit 3 serves as the output end of the power supply module. The DC-DC unit 3 is used to convert the first voltage of the first end into the second voltage of the second end.

[0030] It can be understood that, through the provision of the DC-DC unit 3, the power supply module can utilize the conversion function of the DC-DC unit 3 to convert the input first voltage into a second voltage, thereby meeting the load's usage requirements. At the same time, by sequentially connecting the first diode D1 and the second diode D2 in series at the first end of the DC-DC unit 3, the power supply module can utilize the unidirectional conduction characteristics of the first diode D1 and the unidirectional conduction characteristics of the second diode D2 to achieve two-stage reverse protection, thereby protecting the DC-DC unit 3 from damage when the power supply is reversed. Moreover, through the provision of the transient voltage suppressor TVS1, when an overvoltage occurs at the input end of the power supply module, the conduction of the transient voltage suppressor TVS1 can be used to guide the excess voltage to ground, preventing the overvoltage from propagating to the DC-DC unit 3. Thus, through the two-stage reverse protection and overvoltage protection of the input protection unit 1, stable voltage conversion of the DC-DC unit 3 can be ensured, thereby achieving safe and reliable power supply, meeting the production needs of the coal mine.

[0031] It should be noted that the input protection unit 1 is used to protect the input end of the power module.

[0032] Among them, the first diode D1 and the second diode D2 are both diodes, which are respectively used to implement the anti-reverse connection function by utilizing the unidirectional conduction characteristic. In addition, the first diode D1 and the second diode D2 are provided at the same time, so that when the first diode D1 is reversely conducted due to a fault, the second diode D2 can still provide anti-reverse connection protection, or when the second diode D2 is reversely conducted due to a fault, the first diode D1 can still provide anti-reverse connection protection. Therefore, by utilizing the double-stage anti-reverse protection of the first diode D1 and the second diode D2, stable protection of the input end of the power module is achieved. The specific types of the first diode D1 and the second diode D2 can be set according to actual needs and are not limited to this.

[0033] The transient voltage suppressor (TVS1) is an overvoltage protection device with bidirectional voltage regulation and bidirectional negative resistance characteristics. It is used to suppress transient overvoltages to achieve stable protection at the input end of the power module. The specific type of transient voltage suppressor (TVS1) can be set according to actual needs and is not restricted.

[0034] The DC-DC unit 3 is used to convert an unstable first voltage at the first end into a stable second voltage at the second end. The specific type of the DC-DC unit 3 can be set according to actual needs and is not limited to this.

[0035] like Figure 1 As shown, in some embodiments, the input protection unit 1 further includes: a positive temperature coefficient (PTC) thermistor P1, which is connected in series between the first end of the DC-DC unit 3 and the first end of the transient voltage suppressor TVS1, and the first end of the PTC thermistor P1 is connected to the first end of the transient voltage suppressor TVS1, and the second end of the PTC thermistor P1 is connected to the first end of the DC-DC unit 3.

[0036] It can be understood that since the first end of the positive temperature coefficient thermistor P1 is connected to the first end of the transient voltage suppressor TVS1, and the second end of the positive temperature coefficient thermistor P1 is connected to the first end of the DC-DC unit 3, the power supply module can utilize the temperature-sensitive characteristics of the positive temperature coefficient thermistor P1 to achieve overheating protection, thereby protecting the DC-DC unit 3 and its load equipment from damage when the temperature is too high.

[0037] It should be noted that the positive temperature coefficient thermistor P1 is a temperature-sensitive semiconductor resistor whose resistance increases in a step-like manner as the temperature rises. Specifically, the operating principle of the positive temperature coefficient thermistor P1 is based on the characteristic of semiconductor materials that their resistance changes with temperature. In the positive temperature coefficient thermistor P1, when the temperature is below a certain temperature (the Curie temperature), the resistance value is relatively small. When the temperature exceeds the Curie temperature, the resistance value increases sharply as the temperature rises. This characteristic is due to the change in the internal crystal structure of the material with temperature, resulting in an increase in resistivity.

[0038] The specific type of the positive temperature coefficient thermistor P1 can be set according to actual needs and is not limited thereto.

[0039] like Figure 1As shown, in some embodiments, the power module further includes: a slow start unit 2, which is connected in series between the first end of the DC-DC unit 3 and the first end of the transient voltage suppressor TVS1, and the first end of the slow start unit 2 is connected to the first end of the transient voltage suppressor TVS1, and the second end of the slow start unit 2 is connected to the first end of the DC-DC unit 3.

[0040] It can be understood that since the first end of the slow start unit 2 is connected to the first end of the transient voltage suppressor TVS1, and the second end of the slow start unit 2 is connected to the first end of the DC-DC unit 3, the power supply module can utilize the slow start function of the slow start unit 2 to avoid the large current impact at the moment of startup, thereby achieving the function of delayed startup and reduced startup current, thereby effectively protecting the DC-DC unit 3 and its load equipment, and improving the reliability and stability of the power supply.

[0041] It should be noted that the soft start unit 2 is used to control the sharp change in current when the power supply starts, so as to reduce the impact on the components and loads in the power supply module. The soft start unit 2 gradually increases the time for the power supply to supply power to the load, thereby smoothly bringing the system to normal operating state.

[0042] The specific type of the slow start unit 2 can be set according to actual needs and is not limited thereto.

[0043] like Figure 1 As shown, in some embodiments, the soft start unit 2 includes: a first resistor R1, a first capacitor C1, a P-type MOS (MOSFET, Metal-Oxide-Semiconductor Field-Effect Transistor) tube P1 and a second resistor R2, the first end of the first resistor R1 is connected to the first end of the transient voltage suppressor TVS1, and the first end of the first capacitor C1 is connected to the first end of the first resistor R1, the second end of the first capacitor C1 is connected to the first end of the second resistor R2, the source of the MOS tube Q1 is connected to the first end of the first capacitor C1, the drain of the MOS tube Q1 is connected to the first end of the DC-DC unit 3, the gate of the MOS tube Q1 is connected to the second end of the first capacitor C1, the first end of the second resistor R2 is connected to the gate of the MOS tube Q1, and the second end of the second resistor R2 is grounded.

[0044] It can be understood that the first resistor R1, the first capacitor C1, the MOS tube Q1 and the second resistor R2 constitute a slow start circuit. When the power is connected to the input end of the power module, the first capacitor C1 is slowly charged to make the MOS tube Q1 slowly turn on until it is fully turned on, thereby avoiding the large current impact at the startup moment, achieving the function of delayed startup and reducing the startup current, thereby effectively protecting the DC-DC unit 3 and its load equipment, and improving the reliability and stability of the power supply.

[0045] It should be noted that MOS transistor Q1 is P-type. A P-type MOS transistor Q1 is characterized by a P-type semiconductor substrate and N-type semiconductor drain and source electrodes. Specifically, the operating principle of P-type MOS transistor Q1 is based on gate voltage control of the channel. When a positive voltage is applied to the gate, a reverse bias is created between the P-type substrate and the N-type drain and source regions, resulting in the formation of an N-type channel beneath the insulating layer. This channel serves as a conductive path, allowing current to flow from the source to the drain. By controlling the gate voltage, the channel width and conductivity can be adjusted, thereby achieving a switching function. The specific type of MOS transistor Q1 can be set according to actual needs and is not limited.

[0046] The first capacitor C1 is used to utilize the charging characteristics to realize the slow conduction of the MOS tube Q1, thereby realizing slow startup. The specific type of the first capacitor C1 can be set according to actual needs and is not limited thereto.

[0047] The first resistor R1 and the second resistor R2 are used to cooperate with the first capacitor C1 and the MOS tube Q1 to play the role of voltage division and current limiting. The specific types of the first resistor R1 and the second resistor R2 can be set according to actual needs and are not limited to this.

[0048] like Figure 1 As shown, in some embodiments, the DC-DC unit 3 includes: a voltage conversion chip V1, a second capacitor C2, a third capacitor C3, an inductor L1 and a fourth capacitor C4, the input end of the voltage conversion chip V1 is connected to the first end of the transient voltage suppressor TVS1, and the ground end of the voltage conversion chip V1 is grounded, the first end of the second capacitor C2 is connected to the input end of the voltage conversion chip V1, and the second end of the second capacitor C2 is grounded, the first end of the third capacitor C3 is connected to the bootstrap end of the voltage conversion chip V1, and the second end of the third capacitor C3 is connected to the phase end of the voltage conversion chip V1, the first end of the inductor L1 is connected to the second end of the third capacitor C3, the first end of the fourth capacitor C4 is connected to the second end of the inductor L1, and the second end of the fourth capacitor C4 is grounded, and the first end of the fourth capacitor C4 serves as the output end of the power supply module.

[0049] It can be understood that the voltage conversion chip V1 cooperates with the second capacitor C2 and the third capacitor C3 to form a stable voltage conversion circuit, and the inductor L1 and the fourth capacitor C4 form a resonant circuit. Therefore, with the cooperation of the voltage conversion chip V1, the second capacitor C2, the third capacitor C3, the inductor L1 and the fourth capacitor C4, the DC-DC conversion function is achieved, thereby ensuring stable power consumption of the load.

[0050] It should be noted that the voltage conversion chip V1 is used for voltage conversion. The voltage conversion chip V1 has pins such as an input terminal (VIN), a ground terminal (GND), a bootstrap terminal (BOOT), a phase terminal (PH), and a feedback terminal (VSENSE). The specific type of the voltage conversion chip V1 can be set according to actual needs and is not limited to this. For example, the voltage conversion chip V1 can be a TPS543 series chip.

[0051] The second capacitor C2 is used for voltage stabilization and filtering at the input end of the voltage conversion chip V1 to ensure stable voltage conversion of the voltage conversion chip V1. The specific type of the second capacitor C2 can be set according to actual needs and is not limited to this.

[0052] The third capacitor C3 is used to cooperate with the bootstrap terminal and the phase terminal of the voltage conversion chip V1 to form a bootstrap circuit. The specific type of the third capacitor C3 can be set according to actual needs and is not limited to this.

[0053] The inductor L1 and the fourth capacitor C4 form an LC resonant circuit to achieve a specific frequency response and filtering effect. The specific types of the inductor L1 and the fourth capacitor C4 can be set according to actual needs and are not limited thereto.

[0054] like Figure 1 As shown, in some embodiments, the DC-DC unit 3 further includes: a third resistor R3 and a fourth resistor R4, the first end of the third resistor R3 is connected to the first end of the fourth capacitor C4, and the second end of the third resistor R3 is connected to the feedback end of the voltage conversion chip V1, the first end of the third resistor R3 serves as the output end of the power module, the first end of the fourth resistor R4 is connected to the second end of the third resistor R3, and the second end of the fourth resistor R4 is grounded.

[0055] It can be understood that since the first end of the third resistor R3 is connected to the first end of the fourth capacitor C4, and the first end of the fourth resistor R4 is connected to the second end of the third resistor R3, and the second end of the fourth resistor R4 is grounded, the third resistor R3 and the fourth resistor R4 constitute a voltage divider circuit. At the same time, since the second end of the third resistor R3 is connected to the feedback end of the voltage conversion chip V1, the voltage divider circuit can feed back part of the output voltage to the voltage conversion chip V1, thereby ensuring the accurate conversion of the voltage by the voltage conversion chip V1, and further ensuring the stable power consumption of the load.

[0056] It should be noted that the third resistor R3 and the fourth resistor R4 are used for voltage division feedback of the output voltage. The specific types of the third resistor R3 and the fourth resistor R4 can be set according to actual needs and are not limited thereto.

[0057] The voltage value ultimately output by the DC-DC conversion unit 3 can be adjusted by adjusting the resistance values ​​of the third resistor R3 and the fourth resistor R4.

[0058] like Figure 1 As shown, in some embodiments, the DC-DC unit 3 further includes: a third diode D3, the cathode of the third diode D3 is respectively connected to the second end of the third capacitor C3 and the first end of the inductor L1, and the anode of the third diode D3 is grounded.

[0059] It can be understood that since the cathode of the third diode D3 is respectively connected to the second end of the third capacitor C3 and the first end of the inductor L1, and the anode of the third diode D3 is grounded, the DC-DC unit 3 can use the reverse-connected third diode D3 to achieve reverse voltage protection, thereby ensuring stable voltage transmission from the DC-DC unit 3 to the load.

[0060] It should be noted that the specific type of the third diode D3 can be set according to actual needs and is not limited to this. For example, the third diode D3 can be a Schottky diode.

[0061] like Figure 1 As shown, in some embodiments, the DC-DC unit 3 further includes: an electrolytic capacitor E1 , a first end of the electrolytic capacitor E1 is connected to the second end of the inductor L1 , and a second end of the electrolytic capacitor E1 is grounded.

[0062] It can be understood that since the first end of the electrolytic capacitor E1 is connected to the second end of the inductor L1, and the second end of the electrolytic capacitor E1 is grounded, the LC resonant circuit formed by the inductor L1 and the fourth capacitor C4 can utilize the electrolytic capacitor E1 to enhance the filtering effect, stabilize the voltage, and provide additional energy storage capacity, thereby ensuring stable voltage transmission from the DC-DC unit 3 to the load.

[0063] It should be noted that the electrolytic capacitor E1 is used in parallel in the LC resonant circuit to enhance the filtering effect, stabilize the voltage and provide additional energy storage.

[0064] Electrolytic capacitor E1 is a polarized capacitor composed of an electrolyte as a dielectric material and plates. Its primary function is to store energy and provide a large charge capacity, making it particularly useful for smoothing power supply noise, stabilizing voltage, or filtering. The specific type of electrolytic capacitor E1 can be selected based on actual needs and is not limited thereto.

[0065] The first capacitor C1 , the second capacitor C2 , the third capacitor C3 , the fourth capacitor C4 , etc. are all fixed capacitors, which are different from the electrolytic capacitor E1 .

[0066] like Figure 1 As shown, in some embodiments, the power supply module further includes: an output protection unit 4, the output protection unit 4 includes: a first voltage regulator tube ZD1, a first thyristor Q2, a fifth resistor R5 and a sixth resistor R6, the negative electrode of the first voltage regulator tube ZD1 is connected to the second end of the DC-DC conversion unit 3, and the positive electrode of the first voltage regulator tube ZD1 is respectively connected to the first end of the fifth resistor R5 and the first end of the sixth resistor R6, the anode of the first thyristor Q2 is connected to the negative electrode of the first voltage regulator tube ZD1, the cathode of the first thyristor Q2 is connected to the second end of the fifth resistor R5, the second end of the fifth resistor R5 is grounded, the control electrode of the first thyristor Q2 is connected to the second end of the sixth resistor R6, and the anode of the first thyristor Q2 serves as the output end of the power supply module.

[0067] It can be understood that the first voltage regulator ZD1, the first thyristor Q2, the fifth resistor R5 and the sixth resistor R6 constitute a first output protection circuit. When the DC-DC unit 3 is damaged or fails, the first voltage regulator ZD1 and the first thyristor Q2 start to work, stabilize the voltage within the expected range, and protect the subsequent load from being damaged by high voltage.

[0068] It should be noted that the first voltage-stabilizing diode ZD1 is used to maintain a constant output voltage. The specific type of the first voltage-stabilizing diode ZD1 can be set according to actual needs and is not limited thereto.

[0069] The first thyristor Q2 is used to cooperate with the first voltage regulator ZD1 to achieve a constant output voltage. The specific type of the first thyristor Q2 can be set according to actual needs and is not limited to this.

[0070] The fifth resistor R5 and the sixth resistor R6 are used to cooperate with the first voltage regulator ZD1 and the first thyristor Q2 to play the role of voltage division and current limiting. The specific types of the fifth resistor R5 and the sixth resistor R6 can be set according to actual needs and are not limited to this.

[0071] like Figure 1As shown, in some embodiments, the output protection unit 4 further includes: a second voltage-stabilizing tube ZD2, a second thyristor Q3, a seventh resistor R7 and an eighth resistor R8, the cathode of the second voltage-stabilizing tube ZD2 is connected to the anode of the first thyristor Q2, and the positive electrode of the second voltage-stabilizing tube ZD2 is connected to the first end of the seventh resistor R7 and the first end of the eighth resistor R8, respectively, the anode of the second thyristor Q3 is connected to the negative electrode of the second voltage-stabilizing tube ZD2, the cathode of the second thyristor Q3 is connected to the second end of the seventh resistor R7, the second end of the seventh resistor R7 is grounded, and the control electrode of the second thyristor Q3 is connected to the second end of the eighth resistor R8.

[0072] It can be understood that the second voltage regulator tube ZD2, the second thyristor Q3, the seventh resistor R7 and the eighth resistor R8 constitute a second output protection circuit. When the DC-DC unit 3 is damaged or fails, the second voltage regulator tube ZD2 and the second thyristor Q3 start to work, stabilize the voltage within the expected range, and protect the subsequent load from being damaged by high voltage.

[0073] At the same time, the setting of the first output protection circuit and the second output protection circuit realizes the double-stage voltage stabilization of the output voltage of the DC-DC unit 3, thereby effectively protecting the DC-DC unit 3 and its load equipment, and improving the reliability and stability of the power supply.

[0074] It should be noted that the simultaneous setting of the first output protection circuit and the second output protection circuit enables the second output protection circuit to still provide voltage stabilization protection when the first output protection circuit fails, or, when the second output protection circuit fails, the first output protection circuit to still provide voltage stabilization protection. Thus, by utilizing the dual-stage voltage stabilization of the first output protection circuit and the second output protection circuit, stable protection of the output end of the power module is achieved.

[0075] The second voltage-stabilizing tube ZD2 is used to maintain a constant output voltage. The specific type of the second voltage-stabilizing tube ZD2 can be set according to actual needs and is not limited thereto.

[0076] The second thyristor Q3 is used to cooperate with the second voltage regulator ZD2 to achieve a constant output voltage. The specific type of the second thyristor Q3 can be set according to actual needs and is not limited to this.

[0077] The seventh resistor R7 and the eighth resistor R8 are used to cooperate with the second voltage regulator ZD2 and the second thyristor Q3 to play the role of voltage division and current limiting. The specific types of the seventh resistor R7 and the eighth resistor R8 can be set according to actual needs and are not limited to this.

[0078] It should be noted that, in the description of this disclosure, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, in the description of this disclosure, unless otherwise specified, the meaning of "plurality" is two or more.

[0079] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present disclosure includes additional implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present disclosure belong.

[0080] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0081] Although the embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are illustrative and are not to be construed as limitations on the present disclosure. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present disclosure.

Claims

1. A mining intrinsically safe power supply module, characterized in that: include: An input protection unit, the input protection unit comprising: a first diode, a second diode, and a transient voltage suppressor, wherein the anode of the first diode serves as the input terminal of the power module, the cathode of the first diode is connected to the anode of the second diode, the cathode of the second diode is connected to the first terminal of the transient voltage suppressor, and the second terminal of the transient voltage suppressor is grounded; A DC-DC unit, wherein the first end of the DC-DC unit is connected to the first end of the transient voltage suppression tube, and the second end of the DC-DC unit serves as the output end of the power module, and the DC-DC unit is used to convert a first voltage at the first end into a second voltage at the second end.

2. The intrinsically safe power supply module for mining according to claim 1, characterized in that: The input protection unit further includes: A positive temperature coefficient thermistor is connected in series between the first end of the DC-DC converter and the first end of the transient voltage suppressor, and the first end of the positive temperature coefficient thermistor is connected to the first end of the transient voltage suppressor, and the second end of the positive temperature coefficient thermistor is connected to the first end of the DC-DC converter.

3. The intrinsically safe power supply module for mining according to claim 1, characterized in that: The power module further includes: A slow-start unit is connected in series between the first end of the DC-DC converter and the first end of the transient voltage suppressor, and the first end of the slow-start unit is connected to the first end of the transient voltage suppressor, and the second end of the slow-start unit is connected to the first end of the DC-DC converter.

4. The intrinsically safe power supply module for mining according to claim 3, characterized in that: The soft start unit comprises: A first resistor, a first capacitor, a P-type MOS transistor, and a second resistor, wherein the first end of the first resistor is connected to the first end of the transient voltage suppressor, the first end of the first capacitor is connected to the first end of the first resistor, the second end of the first capacitor is connected to the first end of the second resistor, the source of the MOS transistor is connected to the first end of the first capacitor, the drain of the MOS transistor is connected to the first end of the DC-DC converter, the gate of the MOS transistor is connected to the second end of the first capacitor, the first end of the second resistor is connected to the gate of the MOS transistor, and the second end of the second resistor is grounded.

5. The intrinsically safe power supply module for mining according to claim 1, characterized in that: The DC-DC unit comprises: A voltage conversion chip, wherein the input end of the voltage conversion chip is connected to the first end of the transient voltage suppressor, and the ground end of the voltage conversion chip is grounded; a second capacitor, wherein a first end of the second capacitor is connected to the input end of the voltage conversion chip, and a second end of the second capacitor is grounded; a third capacitor, wherein a first end of the third capacitor is connected to the bootstrap end of the voltage conversion chip, and a second end of the third capacitor is connected to the phase end of the voltage conversion chip; an inductor, wherein a first end of the inductor is connected to a second end of the third capacitor; A fourth capacitor, wherein a first end of the fourth capacitor is connected to the second end of the inductor, and a second end of the fourth capacitor is grounded, and a first end of the fourth capacitor serves as an output end of the power module.

6. The intrinsically safe power supply module for mining according to claim 5, characterized in that: The DC-DC unit further includes: a third resistor, wherein a first end of the third resistor is connected to the first end of the fourth capacitor, a second end of the third resistor is connected to the feedback end of the voltage conversion chip, and the first end of the third resistor serves as the output end of the power module; a fourth resistor, wherein a first end of the fourth resistor is connected to the second end of the third resistor, and a second end of the fourth resistor is grounded.

7. The intrinsically safe power supply module for mining according to claim 5, characterized in that: The DC-DC unit further includes: A third diode has a cathode connected to the second end of the third capacitor and the first end of the inductor respectively, and an anode of the third diode is grounded.

8. The intrinsically safe power supply module for mining according to claim 5, characterized in that: The DC-DC unit further includes: an electrolytic capacitor, wherein a first end of the electrolytic capacitor is connected to a second end of the inductor, and a second end of the electrolytic capacitor is grounded.

9. The intrinsically safe power supply module for mining according to claim 1, characterized in that: The power module further includes: An output protection unit includes: a first voltage-stabilizing diode, a first thyristor, a fifth resistor, and a sixth resistor, wherein the cathode of the first voltage-stabilizing diode is connected to the second end of the DC-DC conversion unit, and the positive electrode of the first voltage-stabilizing diode is connected to the first end of the fifth resistor and the first end of the sixth resistor, respectively; the anode of the first thyristor is connected to the negative electrode of the first voltage-stabilizing diode, the cathode of the first thyristor is connected to the second end of the fifth resistor, the second end of the fifth resistor is grounded, the control electrode of the first thyristor is connected to the second end of the sixth resistor, and the anode of the first thyristor serves as the output end of the power module.

10. The intrinsically safe power supply module for mining according to claim 9, characterized in that: The output protection unit further includes: A second voltage-stabilizing diode, a second thyristor, a seventh resistor and an eighth resistor, wherein the cathode of the second voltage-stabilizing diode is connected to the anode of the first thyristor, and the positive electrode of the second voltage-stabilizing diode is respectively connected to the first end of the seventh resistor and the first end of the eighth resistor, the anode of the second thyristor is connected to the negative electrode of the second voltage-stabilizing diode, the cathode of the second thyristor is connected to the second end of the seventh resistor, the second end of the seventh resistor is grounded, and the control electrode of the second thyristor is connected to the second end of the eighth resistor.

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