Power supply device and electric equipment

Abstract

The utility model relates to the technical field of power supplies, in particular to a power supply device and electric equipment, and the power supply device comprises an input interface assembly and an output interface assembly. The booster circuit is used for boosting the input voltage received from the input interface component and outputting a first output voltage and a first output current through the output interface component; the step-down circuit is used for carrying out step-down on the input voltage and outputting second output voltage and second output current through the output interface assembly; the voltage reduction circuit is also used for reducing the input voltage; and the safety barrier circuit is used for carrying out amplitude limiting on the third output voltage and the third output current, and outputting the third output voltage and the third output current after amplitude limiting through the output interface assembly. According to the embodiment of the utility model, power supply for explosion-proof equipment or power supply for non-explosion-proof equipment can be realized, output of various voltages can be realized through the boost circuit and the step-down circuit, and the flexibility of the power supply device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply, in particular to a power supply device and an electrical equipment. Background Art

[0002] Power supply includes power supply for explosion-proof equipment and power supply for non-explosion-proof equipment. The current power supply is generally designed to power only explosion-proof equipment or only non-explosion-proof equipment. For example, the instrument constant current source disclosed in Chinese utility model patent CN218995942U can only output a constant current signal to power explosion-proof equipment. For another example, the DC-to-DC converter disclosed in Chinese invention patent CN102195485B can only power non-explosion-proof equipment. In addition, the voltage range that the power supply in the related technology can support is relatively small.

[0003] It can be seen that the power supply in the related technology has poor flexibility and cannot adapt to the power supply needs of various scenarios. Utility Model Content

[0004] According to one aspect of the present invention, a power supply device is provided, the power supply device comprising:

[0005] An input interface component and an output interface component;

[0006] a boost circuit, connected to the input interface component, configured to boost an input voltage received from the input interface component to obtain a first output voltage and a corresponding first output current, and output the first output voltage and the first output current through the output interface component;

[0007] a step-down circuit, connected to the input interface component, configured to step down the input voltage to obtain a second output voltage and a corresponding second output current, and output the second output voltage and the second output current through the output interface component;

[0008] The step-down circuit is further used to step down the input voltage to obtain a third output voltage and a corresponding third output current;

[0009] The safety gate circuit is connected to the step-down circuit, and is used for limiting the third output voltage and the third output current, and outputting the limited third output voltage and the third output current through the output interface component.

[0010] In a possible implementation, the safety barrier circuit includes a fuse, a voltage stabilizing circuit, and a current limiting circuit, wherein:

[0011] The fuse is used to receive the third output voltage and the third output current, and the fuse is used to disconnect when the third output current is greater than the first preset current;

[0012] The voltage stabilizing circuit is connected to the fuse and is used to stabilize the third output voltage within a preset range;

[0013] The current limiting circuit is used to cut off the connection with the output interface component when the third output current is greater than the second preset current.

[0014] In a possible implementation manner, the voltage stabilizing circuit includes at least two parallel voltage stabilizing branches, a common node of each voltage stabilizing branch is connected to the output end of the fuse, and each voltage stabilizing branch includes at least one voltage stabilizing diode connected in series;

[0015] In a possible implementation, the current limiting circuit includes a sampling resistor, a first resistor, a second resistor, a third resistor, a fourth resistor, a first triode, a first diode, a first transistor, and a first capacitor, wherein:

[0016] The emitter of the first transistor is connected to the first end of the sampling resistor, the output end of the fuse and the common node of each voltage stabilizing branch.

[0017] The base of the first transistor is connected to the second end of the sampling resistor, the cathode of the first diode, the first end of the second resistor and the source of the first transistor.

[0018] The collector of the first transistor is connected to the first end of the first resistor.

[0019] The second end of the first resistor is connected to the first end of the first capacitor, the anode of the first diode, the second end of the second resistor, the gate of the first transistor and the first end of the third resistor, and the second end of the first capacitor and the second end of the third resistor are grounded.

[0020] The drain of the first transistor is connected to the first end of the fourth resistor, and the second end of the fourth resistor is connected to the output interface component.

[0021] In a possible implementation, the power supply device includes:

[0022] An isolation circuit, connected to the input interface component, for isolating a signal input by the input interface component;

[0023] The protection circuit is arranged between the isolation circuit and the output interface component.

[0024] In a possible implementation, the isolation circuit includes: a first signal conversion component, an isolation component, a second signal conversion component, and an isolation power supply, wherein:

[0025] The first signal conversion component and the second signal conversion component are both used to perform a conversion operation between a first type signal and a second type signal;

[0026] The isolation component is disposed between the first signal conversion component and the second signal conversion component, and is used for signal isolation;

[0027] The isolated power supply is used to provide isolated power supply to the first signal conversion component and the second signal conversion component.

[0028] In a possible implementation manner, the first type signal is an RS485 signal, and the second type signal is a UART signal.

[0029] The isolation component includes a first optocoupler and a second optocoupler. The first optocoupler is arranged between the output end of the first signal conversion component and the input end of the second signal conversion component. The second optocoupler is arranged between the input end of the first signal conversion component and the output end of the second signal conversion component.

[0030] In a possible implementation, the protection circuit includes a transient suppression component, a surge protection component, a discharge component, and a current limiting protection component, wherein:

[0031] The transient suppression component includes a plurality of transient suppression diodes connected in series, and each output end of the isolation circuit is respectively connected to a series connection point of each transient suppression diode;

[0032] The surge protection component includes a plurality of surge protectors, the first end of each surge protector is connected to each of the series connection points, and the second end of each surge protector is connected to the input end of the discharge component;

[0033] The output end of the discharge component is grounded;

[0034] The current limiting protection component includes a plurality of current limiting protection units, the first end of each surge protector is also respectively connected to the first end of each current limiting protection unit, and the second end of each current limiting protection unit is connected to the output interface component.

[0035] In a possible implementation, the power supply device includes:

[0036] A circuit board, the input interface component, the boost circuit, the buck circuit, and the safety gate circuit are arranged on the circuit board, the circuit board is provided with an isolation coating, and the isolation coating wraps the circuit board;

[0037] A housing is provided in which the circuit board is arranged.

[0038] In a possible implementation manner, the thickness of the isolation coating is 2 to 5 mm.

[0039] According to one aspect of the utility model, an electrical device is provided, and the device includes the power supply device.

[0040] The utility model uses a boost circuit to boost the input voltage received from the input interface component to obtain a first output voltage and a corresponding first output current, outputs the first output voltage and the first output current through the output interface component, reduces the input voltage to obtain a second output voltage and a corresponding second output current, outputs the second output voltage and the second output current through the output interface component, limits the third output voltage and the third output current through a safety gate circuit, and outputs the limited third output voltage and the third output current through the output interface component, thereby realizing power supply to explosion-proof equipment or power supply to non-explosion-proof equipment, and realizing output of multiple voltages through the boost circuit and the step-down circuit, thereby improving the flexibility of the power supply device.

[0041] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and do not limit the present invention. Other features and aspects of the present invention will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The drawings herein are incorporated into the specification and constitute a part of the specification. These drawings illustrate embodiments consistent with the present utility model and are used together with the specification to illustrate the technical solution of the present utility model.

[0043] Figure 1 A block diagram of a power supply device according to an embodiment of the utility model is shown.

[0044] Figure 2 A schematic diagram of the circuit structure of a safety barrier circuit according to an embodiment of the utility model is shown.

[0045] Figure 3 A block diagram of a power supply device according to an embodiment of the utility model is shown.

[0046] Figure 4 A schematic diagram of an isolation circuit according to an embodiment of the utility model is shown.

[0047] Figure 5 A schematic diagram of an isolation circuit according to an embodiment of the utility model is shown.

[0048] Figure 6 A schematic structural diagram of a housing according to an embodiment of the utility model is shown. DETAILED DESCRIPTION

[0049] Various exemplary embodiments, features and aspects of the present invention will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0050] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0051] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0052] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0054] The term "and / or" herein is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the term "at least one" herein represents any combination of at least two of any one or more of a plurality of. For example, including at least one of A, B, and C can represent including any one or more elements selected from the set consisting of A, B, and C.

[0055] In addition, in order to better illustrate the utility model, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the utility model can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the main purpose of the utility model.

[0056] See also Figure 1 , Figure 1 A block diagram of a power supply device according to an embodiment of the utility model is shown.

[0057] like Figure 1 As shown, the power supply device includes:

[0058] An input interface component 10 and an output interface component 20;

[0059] A boost circuit 30, connected to the input interface component 10, for boosting the input voltage received from the input interface component 10 to obtain a first output voltage and a corresponding first output current, and outputting the first output voltage and the first output current through the output interface component 20;

[0060] A step-down circuit 40, connected to the input interface component 10, for stepping down the input voltage to obtain a second output voltage and a corresponding second output current, and outputting the second output voltage and the second output current through the output interface component 20;

[0061] The step-down circuit 40 is further used to step down the input voltage to obtain a third output voltage and a corresponding third output current;

[0062] The safety gate circuit 50 is connected to the step-down circuit 40 , and is used to limit the third output voltage and the third output current, and output the limited third output voltage and the third output current through the output interface component 20 .

[0063] In the embodiment of the utility model, the input voltage received from the input interface component 10 is boosted by the boost circuit 30 to obtain a first output voltage and a corresponding first output current, the first output voltage and the first output current are output through the output interface component 20, the second output voltage and the second output current are obtained by stepping down the input voltage, the second output voltage and the second output current are output through the output interface component 20, the third output voltage and the third output current are limited by the safety gate circuit 50, and the third output voltage and the third output current after the limit are output through the output interface component 20, so that power supply to explosion-proof equipment or power supply to non-explosion-proof equipment can be realized, and the output of multiple voltages can be realized through the boost circuit 30 and the step-down circuit 40, thereby improving the flexibility of the power supply device.

[0064] The embodiment of the utility model does not limit the specific implementation of the input interface component 10, the output interface component 20, the boost circuit 30, the buck circuit 40, and the safety gate circuit 50. In the embodiment of the utility model, each component can be implemented by a hardware circuit, and those skilled in the art can adopt a suitable circuit structure according to actual conditions and needs. Exemplarily, the input interface component 10 and the output interface component 20 can include multiple ports for transmitting power and signals, and the boost circuit 30 and the buck circuit 40 can be implemented by a DC-DC conversion module (DC / DC). Of course, if the voltage connected to the input interface component 10 is an AC voltage, an AC-DC conversion module (AC / DC) can also be configured, and this is not limited by the embodiment of the utility model.

[0065] The embodiment of the utility model does not limit the specific sizes of the input voltage, the first output voltage and the first output current output by the boost module, the second output voltage and the second output current output by the buck module, and the third output voltage and the third output current output by the safety gate circuit 50. Those skilled in the art can set them according to actual conditions and needs. For example, the input voltage is, for example, 7-19V, the first output voltage is, for example, 24V, the first output current is, for example, a maximum of 2A, the second output voltage is, for example, 5V, the second output current is, for example, a maximum of 2A, the third output voltage is, for example, 6.7V, the third output current is, for example, a maximum of 2A, the third output voltage of the limited output is, for example, 6V, and the third output current of the limited output is, for example, a maximum of 500mA.

[0066] For example, the power supply device of the embodiment of the utility model not only supplies power to 6V intrinsically safe equipment, but also supports 5V and 24V power output, that is, the power supply device of the embodiment of the utility model supports various power outputs such as 5V, 6V, and 24V at the same time. The power supply device supports an input voltage of 7-19V, and the input voltage is boosted to 24V and output through the boost circuit 30, with a maximum current of 2A; it is stepped down to 5V and output through the step-down circuit 40, with a maximum current of 2A. The 6.7V power output by the step-down circuit 40 is processed by the safety gate circuit 50 to output a 6V voltage, which can supply power to 6V intrinsically safe explosion-proof equipment, with a maximum current of 500mA.

[0067] The preferred implementation of the safety gate circuit 50 is exemplarily introduced below.

[0068] See also Figure 2 , Figure 2 A schematic diagram of the circuit structure of a safety barrier circuit according to an embodiment of the utility model is shown.

[0069] In a possible implementation, Figure 2 As shown, the safety gate circuit 50 includes a fuse F1, a voltage stabilizing circuit 510, and a current limiting circuit 520, wherein:

[0070] The fuse F1 is used to receive the third output voltage and the third output current, and the fuse F1 is used to disconnect when the third output current is greater than a first preset current (for example, 500 mA);

[0071] The voltage stabilizing circuit 510 is connected to the fuse F1 and is used to stabilize the third output voltage within a preset range (e.g., 6.5-7V);

[0072] The current limiting circuit 520 is used to cut off the connection with the output interface component 20 when the third output current is greater than the second preset current (the second preset current can be less than or equal to the first preset current, for example, the second preset current can be 500mA, or less than 500mA).

[0073] The embodiment of the utility model does not limit the specific implementation of the voltage stabilizing circuit 510 and the current limiting circuit 520, and those skilled in the art can configure them according to actual conditions and needs.

[0074] In a possible implementation, Figure 2 As shown, the voltage stabilizing circuit 510 includes at least two parallel voltage stabilizing branches, a common node of each voltage stabilizing branch is connected to the output end of the fuse F1, and each voltage stabilizing branch includes at least one voltage stabilizing diode connected in series.

[0075] It should be noted that although Figure 2The figure shows a situation in which two parallel voltage-stabilizing branches are included, and each voltage-stabilizing branch includes two voltage-stabilizing diodes connected in series (for example, the first voltage-stabilizing branch includes a first voltage-stabilizing diode Z1 and a second voltage-stabilizing diode Z2, and the second voltage-stabilizing branch includes a third voltage-stabilizing diode Z3 and a third voltage-stabilizing diode Z4). However, the embodiments of the present invention are not limited to this. The voltage-stabilizing circuit 510 may include three voltage-stabilizing branches or more voltage-stabilizing branches. Each voltage-stabilizing branch may include only one voltage-stabilizing diode, or may include three, four or more voltage-stabilizing diodes connected in series. The embodiments of the present invention are not limited to this.

[0076] In a possible implementation, Figure 2 As shown, the current limiting circuit 520 may include a sampling resistor R0, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first transistor T1, a first diode D1, a first transistor Q1, and a first capacitor C1, wherein:

[0077] The emitter (2) of the first transistor T1 is connected to the first end of the sampling resistor R0, the output end of the fuse F1 and the common node of each voltage stabilizing branch.

[0078] The base (1) of the first transistor T1 is connected to the second end of the sampling resistor R0, the cathode of the first diode D1, the first end of the second resistor R2 and the source (3) of the first transistor Q1.

[0079] The collector (3) of the first transistor T1 is connected to the first end of the first resistor R1.

[0080] The second end of the first resistor R1 is connected to the first end of the first capacitor C1, the anode of the first diode D1, the second end of the second resistor R2, the gate (1) of the first transistor Q1 and the first end of the third resistor R3, and the second end of the first capacitor C1 and the second end of the third resistor R3 are grounded.

[0081] The drain ( 2 ) of the first transistor Q1 is connected to the first end of the fourth resistor R4 , and the second end of the fourth resistor R4 is connected to the output interface component 20 .

[0082] For example, Figure 2As shown, the current first passes through the fuse F1. The function of the fuse F1 is to disconnect after the current exceeds 500mA to avoid danger caused by excessive current. Then the current passes through the voltage stabilizing circuit 510. The function of the voltage stabilizing circuit 510 is to limit the voltage. When the voltage is too high or too low, the voltage can be maintained constant at about 6.7V to protect the subsequent circuits and load devices. After that, the current passes through the sampling resistor R0. The sampling resistor R0 is between the base and the emitter of the first transistor T1 (for example, it can be a PNP transistor). If the current passing through the sampling resistor R0 is greater than 500mA, the voltage difference between the base and the collector of the first transistor T1 is greater than 0.7V, and the collector of the first transistor T1 will be pulled high. The collector of the first transistor T1 is connected to the gate of the first transistor Q1 (for example, a PMOS tube) through the first resistor R1, and the gate of the first transistor Q1 will be pulled high, and the source and drain of the first transistor Q1 will be disconnected, which also limits the current and protects the intrinsically safe equipment connected to the subsequent stage.

[0083] The embodiments of the present utility model do not limit other functions of the power supply device. Those skilled in the art can set them according to actual conditions and needs. An exemplary introduction is given below.

[0084] See also Figure 3 , Figure 3 A block diagram of a power supply device according to an embodiment of the utility model is shown.

[0085] In a possible implementation, Figure 3 As shown, the power supply device may further include:

[0086] An isolation circuit 60, connected to the input interface component 10, for isolating a signal input by the input interface component 10;

[0087] The protection circuit 70 is arranged between the isolation circuit 60 and the output interface component 20 .

[0088] The embodiment of the utility model does not limit the specific implementation of the isolation circuit 60 and the protection circuit 70. Those skilled in the art can adopt appropriate circuit implementation according to actual conditions and needs, which is exemplarily introduced below.

[0089] See also Figure 4 , Figure 4 A schematic diagram of an isolation circuit according to an embodiment of the utility model is shown.

[0090] In a possible implementation, Figure 4 As shown, the isolation circuit 60 may include: a first signal conversion component 610, an isolation component 630, a second signal conversion component 620, and an isolation power supply 640, wherein:

[0091] The first signal conversion component 610 and the second signal conversion component 620 are both used to perform conversion operations between the first type signal and the second type signal;

[0092] The isolation component 630 is disposed between the first signal conversion component 610 and the second signal conversion component 620 for signal isolation;

[0093] The isolated power supply 640 is used to provide isolated power supply to the first signal conversion component 610 and the second signal conversion component 620. Of course, the isolated power supply 640 of the embodiment of the present disclosure can also be used to provide isolated power supply to the isolation component 610.

[0094] The embodiment of the utility model does not limit the specific implementation of the first signal conversion component 610, the isolation component 630, the second signal conversion component 620, and the isolation power supply 640, and those skilled in the art can configure them according to actual conditions and needs.

[0095] The embodiment of the utility model does not limit the specific types of the first type signal and the second type signal. For example, in one possible implementation, the first type signal may be an RS485 signal, and the second type signal may be a UART signal, that is, the first signal conversion component 610 and the second signal conversion component 620 may both realize mutual conversion between RS485 signals and UART signals.

[0096] For example, Figure 4 As shown, the isolation component 630 may include a first optocoupler 6310 and a second optocoupler 6320, wherein the first optocoupler 6310 is arranged between the output end of the first signal conversion component 610 and the input end of the second signal conversion component 620, and the second optocoupler 6320 is arranged between the input end of the first signal conversion component 610 and the output end of the second signal conversion component 620. Exemplarily, the first optocoupler 6310 may be powered by a power supply after isolation, and the second optocoupler 6320 may be powered by a power supply before isolation.

[0097] It should be understood that although the embodiment of the utility model introduces the isolation component 630 by taking the optocoupler as an example, the embodiment of the utility model is not limited to this. Those skilled in the art can use other devices to implement the isolation component 630 according to actual conditions and needs, for example, it can also be implemented by using a transformer isolator, a magnetic couple isolator, etc.

[0098] For example, Figure 4As shown, the signal (for example, a 485 signal) transmitted from the input interface component 10 first passes through the first signal conversion component 610, and the first signal conversion component 610 converts the 485 signal into a UART signal. The TX (transmitter) and RX (receiver) of the first signal conversion component 610 are respectively connected to two optical couplers, and the input and output of the optical coupler are isolated from each other to isolate the UART signal, so that the UART signals at the left and right ends of the optical coupler are independent of each other and are not interfered with. The isolated UART signal is then converted into a 485 signal output by the second signal conversion component 620.

[0099] For example, Figure 4 As shown, in the embodiment of the utility model, not only the signal needs to be isolated, but the power supplies also need to be independent of each other, so an isolated power supply 640 is used, whose input and output are two completely independent power supplies, thereby achieving power supply isolation.

[0100] See also Figure 5 , Figure 5 A schematic diagram of an isolation circuit according to an embodiment of the utility model is shown.

[0101] In a possible implementation, Figure 5 As shown, the protection circuit 70 may include a transient suppression component 710, a surge protection component 720, a discharge component 730, and a current limiting protection component 740, wherein:

[0102] The transient suppression component 710 may include a plurality of transient suppression diodes (e.g., transient suppression diode 7110, transient suppression diode 7120, transient suppression diode 7130) connected in series, and each output end of the isolation circuit 60 is respectively connected to the series connection point of each transient suppression diode;

[0103] The surge protection component 720 may include a plurality of surge protectors (e.g., surge protector 7210, surge protector 7220), wherein a first end of each surge protector is connected to each of the series connection points, and a second end of each surge protector is connected to an input end of the discharge component 730;

[0104] The output end of the discharge component 730 is grounded. Exemplarily, the discharge component 730 may include a gas discharge tube.

[0105] The current limiting protection component 740 may include multiple current limiting protection units (for example, current limiting protection unit 7410, current limiting protection unit 7420), the first end of each surge protector is also respectively connected to the first end of each current limiting protection unit, and the second end of each current limiting protection unit is connected to the output interface component 20. By way of example, the current limiting protection unit may be, for example, a resettable fuse.

[0106] For example, by Figure 4 After the isolation circuit 60 shown in the figure isolates the 485 signal, it also needs to be protected. Figure 5 As shown, the signal first passes through each transient suppression diode in the transient suppression component 710. The function of the transient suppression component 710 is to quickly shunt and clamp the transient overvoltage or surge pulse when it occurs in the circuit, so that other electronic components in the circuit are not damaged.

[0107] For example, Figure 5 As shown, the signal passes through the surge protector in the surge protection component 720. The function of the surge protection component 720 is to control the instantaneous overcurrent and voltage that suddenly rushes into the signal transmission line within the range that the equipment can withstand, or to introduce strong lightning current into the ground, to ensure that the intrinsically safe equipment can work safely and stably without being damaged by impact.

[0108] For example, Figure 5 As shown, the signal passes through the discharge component 730 (such as a gas discharge tube). The discharge component 730 can be used as a lightning arrester. There are two or more electrodes in the tube, which is filled with a certain amount of inert gas and is a gap-type lightning protection element.

[0109] For example, Figure 5 As shown, the signal passes through the current limiting protection unit (such as a resettable fuse) of the current limiting protection component 740 to limit the current. If the current is too large, it will be directly disconnected to protect the subsequent circuit.

[0110] In a possible implementation manner, the power supply device may further include:

[0111] A circuit board, the input interface component 10, the boost circuit 30, the buck circuit 40, and the safety gate circuit 50 are arranged on the circuit board, and the circuit board is provided with an isolation coating, and the isolation coating wraps the circuit board;

[0112] A housing is provided in which the circuit board is arranged.

[0113] The power supply device of the embodiment of the utility model can be a cast and intrinsically safe power supply, which can be used to provide power to intrinsically safe equipment in explosion-proof scenarios. For example, the circuit board can be immersed in a material such as an epoxy resin material, so that the circuit board and the epoxy resin form a whole, which is equivalent to coating the surface of the circuit board with a preset thickness of epoxy material as an isolation coating.

[0114] Illustratively, the embodiments of the utility model cast the circuit boards in an isolation coating to prevent the components in these circuit boards from coming into contact with the explosive mixture, so that the circuit of the power supply device cannot ignite the surrounding explosive mixture during normal operation or recognized overload and fault conditions, thereby further improving the safety and reliability of the circuit.

[0115] See also Figure 6 , Figure 6 A schematic structural diagram of a housing according to an embodiment of the utility model is shown.

[0116] For example, after the circuit board is cast in the embodiment of the utility model, it can be fixed in a shell (for example, an ABS plastic shell), and the shell is treated with anti-static treatment to form an anti-static coating. The specific shape of the shell is not limited, and can be as follows: Figure 6 shown.

[0117] For example, Figure 6 As shown, the housing may include a base 9 and an upper cover 8, wherein the upper cover 8 and the base 9 are detachably connected, and at least one input interface 12 and at least one output interface 11 are provided on the housing.

[0118] The power supply device provided in the embodiment of the utility model can also be a flameproof and intrinsically safe power supply. For example, the circuit board (power supply device) is directly placed in the flameproof housing, and the circuit is isolated from the surrounding environment by means of isolation measures in the structure, so that the heat generated by the circuit board during normal operation and the electric sparks and high temperature formed in the fault state are all limited within the sealed shell to prevent the ignition of the flammable and explosive gas around the outside of the shell. The flameproof housing can be an explosion-proof box.

[0119] In a possible implementation, the thickness of the isolation coating is 2 to 5 mm, for example, 3 mm.

[0120] According to one aspect of the utility model, an electrical device is provided, and the device includes the power supply device.

[0121] The power supply device and electrical equipment of the embodiment of the utility model can be used in strict explosion-proof scenarios, support high-power, wide voltage range power supply output, support the transmission of signals such as 485 signals, and are compatible with connecting to intrinsically safe explosion-proof equipment, with high flexibility and environmental adaptability.

[0122] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A power supply device, characterized in that: The power supply device comprises: An input interface component and an output interface component; a boost circuit, connected to the input interface component, configured to boost an input voltage received from the input interface component to obtain a first output voltage and a corresponding first output current, and output the first output voltage and the first output current through the output interface component; a step-down circuit, connected to the input interface component, configured to step down the input voltage to obtain a second output voltage and a corresponding second output current, and output the second output voltage and the second output current through the output interface component; The step-down circuit is further used to step down the input voltage to obtain a third output voltage and a corresponding third output current; The safety gate circuit is connected to the step-down circuit, and is used for limiting the third output voltage and the third output current, and outputting the limited third output voltage and the third output current through the output interface component.

2. The power supply device according to claim 1, characterized in that: The safety barrier circuit includes a fuse, a voltage stabilizing circuit, and a current limiting circuit, wherein: The fuse is used to receive the third output voltage and the third output current, and the fuse is used to disconnect when the third output current is greater than the first preset current; The voltage stabilizing circuit is connected to the fuse and is used to stabilize the third output voltage within a preset range; The current limiting circuit is used to cut off the connection with the output interface component when the third output current is greater than the second preset current.

3. The power supply device according to claim 2, characterized in that: The voltage stabilizing circuit comprises at least two parallel voltage stabilizing branches, a common node of each voltage stabilizing branch is connected to the output end of the fuse, and each voltage stabilizing branch comprises at least one voltage stabilizing diode connected in series; and / or, The current limiting circuit includes a sampling resistor, a first resistor, a second resistor, a third resistor, a fourth resistor, a first triode, a first diode, a first transistor, and a first capacitor, wherein: The emitter of the first transistor is connected to the first end of the sampling resistor, the output end of the fuse and the common node of each voltage stabilizing branch. The base of the first transistor is connected to the second end of the sampling resistor, the cathode of the first diode, the first end of the second resistor and the source of the first transistor. The collector of the first transistor is connected to the first end of the first resistor. The second end of the first resistor is connected to the first end of the first capacitor, the anode of the first diode, the second end of the second resistor, the gate of the first transistor and the first end of the third resistor, and the second end of the first capacitor and the second end of the third resistor are grounded. The drain of the first transistor is connected to the first end of the fourth resistor, and the second end of the fourth resistor is connected to the output interface component.

4. The power supply device according to claim 1, characterized in that: The power supply device comprises: An isolation circuit, connected to the input interface component, for isolating a signal input by the input interface component; The protection circuit is arranged between the isolation circuit and the output interface component.

5. The power supply device according to claim 4, characterized in that: The isolation circuit includes: a first signal conversion component, an isolation component, a second signal conversion component, and an isolation power supply, wherein: The first signal conversion component and the second signal conversion component are both used to perform a conversion operation between a first type signal and a second type signal; The isolation component is disposed between the first signal conversion component and the second signal conversion component, and is used for signal isolation; The isolated power supply is used to provide isolated power supply to the first signal conversion component and the second signal conversion component.

6. The power supply device according to claim 5, characterized in that: The first type of signal is an RS485 signal, and the second type of signal is a UART signal. The isolation component includes a first optocoupler and a second optocoupler. The first optocoupler is arranged between the output end of the first signal conversion component and the input end of the second signal conversion component. The second optocoupler is arranged between the input end of the first signal conversion component and the output end of the second signal conversion component.

7. The power supply device according to claim 4, characterized in that: The protection circuit includes a transient suppression component, a surge protection component, a discharge component, and a current limiting protection component, wherein: The transient suppression component includes a plurality of transient suppression diodes connected in series, and each output end of the isolation circuit is respectively connected to a series connection point of each transient suppression diode; The surge protection component includes a plurality of surge protectors, the first end of each surge protector is connected to each of the series connection points, and the second end of each surge protector is connected to the input end of the discharge component; The output end of the discharge component is grounded; The current limiting protection component includes a plurality of current limiting protection units, the first end of each surge protector is also respectively connected to the first end of each current limiting protection unit, and the second end of each current limiting protection unit is connected to the output interface component.

8. The power supply device according to any one of claims 1 to 7, characterized in that: The power supply device comprises: A circuit board, the input interface component, the boost circuit, the buck circuit, and the safety gate circuit are arranged on the circuit board, the circuit board is provided with an isolation coating, and the isolation coating wraps the circuit board; A housing is provided in which the circuit board is arranged.

9. The power supply device according to claim 8, characterized in that: The thickness of the isolation coating is 2 to 5 mm.

10. An electrical device, characterized in that: The device comprises the power supply device according to any one of claims 1 to 9.

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