A power supply system and snow removing apparatus
By introducing a DC voltage conversion module and an Ethernet power supply module into the power supply system, and setting a short-circuit self-locking circuit in the Ethernet power supply module, the problem of poor stability and safety of the power supply system is solved, and stable power supply is achieved under fault conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN HANYANG TECHNOLOGY CO LTD
- Filing Date
- 2025-08-15
- Publication Date
- 2026-07-31
AI Technical Summary
Existing power systems using PoE technology are susceptible to surge currents and sudden short-circuit characteristics from electrical loads such as cameras and motors, resulting in poor stability and safety of the power system.
A DC voltage conversion module and an Ethernet power supply module are set in the power supply system, and a short-circuit self-locking circuit is introduced in the Ethernet power supply module. The short-circuit self-locking circuit cuts off the power supply in time when the electrical load fails, thus protecting the power supply system.
Even if a power supply module in the power system fails, it can continue to supply power to the electrical load, thus improving the stability and safety of the power system.
Smart Images
Figure CN224582940U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power supply, and in particular to a power supply system and a snow removal device. Background Technology
[0002] Current snow removal equipment typically integrates multiple electronic control units, such as a main control MCU, motor drive, camera module, and environmental sensors. To simplify the overall vehicle wiring while meeting the requirements of these modules for power supply stability, continuity, and anti-interference capabilities, intelligent snow removal equipment widely adopts PoE (Power over Ethernet) technology, which transmits data and power simultaneously via Ethernet.
[0003] However, in practical applications, due to the characteristics of power loads such as cameras and motors, which have surge current and sudden short circuits, they are very likely to cause overload impact on the front-end power supply structure of the PoE system (responsible for DC-DC step-down, LDO voltage regulation, etc.), thereby causing damage to the components in the power supply system and resulting in poor stability and safety of the power supply system. Summary of the Invention
[0004] This utility model provides a power system and a snow removal device to solve the problem of poor stability and safety of existing power systems.
[0005] To achieve the above objectives, in one embodiment, a power supply system is provided, the power supply system comprising:
[0006] A DC-DC voltage conversion module and an Ethernet power supply module are provided. The first input terminal of the DC-DC voltage conversion module is used to connect to an external power supply, and the second input terminal of the DC-DC voltage conversion module is connected to the output terminal of the Ethernet power supply module. The input terminal of the Ethernet power supply module is used to connect to an Ethernet power supply device.
[0007] The Ethernet power supply module is used to acquire the first power signal sent by the Ethernet power supply device and output the first power signal to the second input terminal of the DC voltage conversion module. The DC voltage conversion module is used to acquire the first power signal and the second power signal sent by the external power supply and output a power supply signal from the output terminal of the DC voltage conversion module. The Ethernet power supply module is provided with a short-circuit self-locking circuit for detecting whether the output is short-circuited.
[0008] In one embodiment, the Power over Ethernet module further includes:
[0009] The system includes a power receiving controller and a voltage regulator module. The input terminal of the power receiving controller serves as the input terminal of the Ethernet power supply module. The output terminal of the power receiving controller is connected to the input terminal of the short-circuit self-locking circuit. The output terminal of the short-circuit self-locking circuit is connected to the input terminal of the voltage regulator module. The output terminal of the voltage regulator module serves as the output terminal of the Ethernet power supply module.
[0010] In one embodiment, the Power over Ethernet module further includes:
[0011] The system includes a power receiving controller, a voltage regulator module, and a reverse protection module. The input terminal of the power receiving controller serves as the input terminal of the Ethernet power supply module. The output terminal of the power receiving controller is connected to the input terminal of the short-circuit self-locking circuit. The output terminal of the short-circuit self-locking circuit is connected to the input terminal of the voltage regulator module. The output terminal of the voltage regulator module is connected to the input terminal of the reverse protection module. The output terminal of the reverse protection module serves as the output terminal of the Ethernet power supply module.
[0012] In one embodiment, the DC-DC voltage conversion module includes:
[0013] The system comprises a first DC-DC converter submodule, a second DC-DC converter submodule, a third DC-DC converter submodule, and a fourth DC-DC converter submodule. The input terminal of the first DC-DC converter submodule serves as the first input terminal of the DC-DC voltage converter module. The first output terminal of the first DC-DC converter submodule is used to output a first power supply signal. The second output terminal of the first DC-DC converter submodule is connected to the input terminal of the second DC-DC converter submodule. The output terminal of the second DC-DC converter module is used to output a second power supply signal.
[0014] The input terminal of the third DC-DC conversion submodule serves as the first input terminal of the DC-DC voltage conversion module. The first output terminal of the third DC-DC conversion submodule is used to output a third power supply signal. The second output terminal of the third DC-DC conversion submodule is connected to the input terminal of the fourth DC-DC conversion submodule. The input terminal of the fourth DC-DC conversion submodule serves as the second input terminal of the DC-DC voltage conversion module. The output terminal of the fourth DC-DC conversion submodule is used to output a fourth power supply signal.
[0015] In one embodiment, the short-circuit self-locking circuit includes:
[0016] The system comprises a first switching transistor, a first resistor module, a second resistor module, and a latching module. One end of the first resistor module is connected to the output of the power receiving controller and serves as the input of the short-circuit self-locking circuit. The other end of the first resistor module is connected to the input of the first switching transistor. The output of the first switching transistor serves as the output of the short-circuit self-locking circuit. The output of the first switching transistor is connected to the input of the second resistor module. The output of the second resistor module is connected to the first input of the latching module. The second input of the latching module is connected to the output of the power receiving controller. The output of the latching module is connected to the control terminal of the first switching transistor.
[0017] In one embodiment, the latch module includes:
[0018] The second switching transistor and the delay module are configured such that the input terminal of the second switching transistor serves as the second input terminal of the latch module, the output terminal of the second switching transistor is connected to the input terminal of the delay module, and the output terminal of the second switching transistor serves as the output terminal of the latch module. The control terminal of the second switching transistor serves as the first input terminal of the latch module, and the output terminal of the delay module is connected to ground.
[0019] In one embodiment, the short-circuit self-locking circuit further includes:
[0020] A filter capacitor module, the two ends of which are respectively connected to the output terminal of the power receiving controller and the control terminal of the second switching transistor;
[0021] The delay module includes:
[0022] A charging capacitor module and a third resistor module are connected in parallel. One end of the charging capacitor module and one end of the third resistor module serve as the input terminals of the delay module, and the other end of the charging capacitor module and the other end of the third resistor module serve as the output terminals of the delay module.
[0023] In one embodiment, the short-circuit self-locking circuit further includes:
[0024] An interference isolation module is provided, with its two ends connected to the negative terminal of the power receiving controller and the negative terminal of the DC voltage conversion module, respectively.
[0025] In one embodiment, the interference isolation module includes:
[0026] An absorption capacitor module and a current limiting protection element are provided, wherein the absorption capacitor module and the current limiting protection element are connected in parallel, and one end of the absorption capacitor module and one end of the current limiting protection element both serve as one end of the interference isolation module, and the other end of the current limiting protection element and the other end of the current limiting protection element both serve as the other end of the interference isolation module.
[0027] In one embodiment, a snow removal device is provided, wherein the power supply system of the snow removal device adopts the power supply system described above.
[0028] The aforementioned power supply system and snow removal equipment include a DC-DC voltage conversion module and an Ethernet power supply module. The DC-DC voltage conversion module processes a first power signal and a second power signal, outputting a power supply signal with a preset voltage for use by different electrical loads. The Ethernet power supply module incorporates a short-circuit self-locking circuit. In the event of a load failure, the short-circuit self-locking circuit promptly cuts off the power supply, thus protecting the power supply system. The power supply system includes two modules: a DC-DC voltage conversion module and an Ethernet power supply module. Even if one of the power supply modules fails, the power supply system can still supply power to the loads, thereby improving the stability and safety of the power supply system. Attached Figure Description
[0029] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0030] Figure 1 This is a schematic diagram of the power supply system in one embodiment of the present invention;
[0031] Figure 2 This is a schematic diagram of another power supply system in one embodiment of the present invention;
[0032] Figure 3 This is a detailed block diagram of the power supply system in one embodiment of the present invention;
[0033] Figure 4 This is a schematic diagram of a short-circuit self-locking circuit in one embodiment of the present invention;
[0034] Figure 5 This is a schematic diagram of the latching module in a short-circuit self-locking circuit according to one embodiment of the present invention;
[0035] Figure 6 This is a schematic diagram of the delay module and the filter capacitor module in a short-circuit self-locking circuit according to one embodiment of the present invention;
[0036] Figure 7 This is a schematic diagram of the interference isolation module in a short-circuit self-locking circuit according to one embodiment of the present invention.
[0037] Reference numerals: 1. DC-DC voltage conversion module; 11. First DC-DC conversion sub-module; 12. Second DC-DC conversion sub-module; 13. Third DC-DC conversion sub-module; 14. Fourth DC-DC conversion sub-module; 2. Power over Ethernet module; 21. Power receiver controller; 22. Voltage regulator module; 23. Short-circuit self-locking circuit; 231. First switching transistor; 232. First resistor module; 233. Second resistor module; 234. Latch module; 2341. Second switching transistor; 2342. Delay module; 4. Charging capacitor module; 5. Third resistor module; 235. Filter capacitor module; 236. Interference isolation module; 2361. Absorption capacitor module; 23 62. Current limiting protection element; 24. Reverse protection module; 6. External power supply; 7. Ethernet power supply device; L1. First input terminal of DC voltage conversion module 1; L2. Second input terminal of DC voltage conversion module 1; L3. Output terminal of DC voltage conversion module 1; P1. First output terminal of first DC conversion submodule 11; P2. Second output terminal of first DC conversion submodule 11; P3. First output terminal of third DC conversion submodule 13; P4. Second output terminal of third DC conversion submodule 13; D1. First input terminal of latch module 234; D2. Second input terminal of latch module 234; D3. Output terminal of latch module 234. Detailed Implementation
[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.
[0039] It should be understood that this invention can be embodied in various forms and should not be construed as being limited to the embodiments set forth herein. Rather, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of this invention to those skilled in the art. In the drawings, for clarity, the dimensions of layers and regions, as well as their relative dimensions, may be exaggerated. The same reference numerals denote the same elements throughout.
[0040] It should be understood that when an element or layer is referred to as "on," "adjacent to," "connected to," or "coupled to" other elements or layers, it may be directly on, adjacent to, connected to, or coupled to other elements or layers, or there may be intervening elements or layers. Conversely, when an element is referred to as "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc., may be used to describe various elements, components, areas, layers, and / or portions, these elements, components, areas, layers, and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, area, layer, or portion from another element, component, area, layer, or portion. Therefore, without departing from the teachings of this utility model, the first element, component, area, layer, or portion discussed below may be referred to as the second element, component, area, layer, or portion.
[0041] Spatial relation terms such as “below,” “under,” “below,” “under,” “above,” “above,” etc., are used herein for convenience of description to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms are intended to also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, then the element or feature described as “below,” “under,” or “below” other elements or features will be oriented “above” other elements or features. Therefore, the exemplary terms “below” and “under” can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or otherwise) and the spatial descriptive terms used herein will be interpreted accordingly.
[0042] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. When used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising” and / or “including,” when used in this specification, identify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.
[0043] To fully understand this utility model, detailed structures and steps will be presented in the following description to illustrate the technical solution proposed by this utility model. Preferred embodiments of this utility model are described in detail below; however, in addition to these detailed descriptions, this utility model may have other embodiments.
[0044] In one embodiment, such as Figure 1 As shown, a power supply system is provided, the power supply system comprising:
[0045] The DC voltage conversion module 1 and the Ethernet power supply module 2 are provided. The first input terminal L1 of the DC voltage conversion module 1 is used to connect to an external power supply 6. The second input terminal L2 of the DC voltage conversion module 1 is connected to the output terminal of the Ethernet power supply module 2. The input terminal of the Ethernet power supply module 2 is used to connect to an Ethernet power supply device 7.
[0046] The Ethernet power supply module 2 is used to acquire the first power signal sent by the Ethernet power supply device 7, and output the first power signal after voltage regulation and step-down processing to the second input terminal L2 of the DC voltage conversion module 1. The DC voltage conversion module 1 is used to acquire the first power signal after voltage regulation and step-down processing and the second power signal sent by the external power supply 6, and output the power supply signal from the output terminal L3 of the DC voltage conversion module 1. The Ethernet power supply module 2 is provided with a short-circuit self-locking circuit.
[0047] For example, the DC voltage conversion module 1 may include two DC-DC modules to output two different voltage power supply signals to supply power to different electrical loads. It may also output three, four or more different voltage power supply signals, which can be adjusted according to the actual electrical loads that need to be powered. All of these are within the protection scope of this utility model.
[0048] The working process of the above power system is as follows:
[0049] The first input terminal L1 of the DC voltage conversion module 1 receives the second power signal through the external power supply 6, converts the second power signal into a power supply signal with a preset voltage, and then outputs the power supply signal through the output terminal L3 of the DC voltage conversion module 1 to supply power to the electrical load.
[0050] The Ethernet power supply module 2 receives the first power signal sent by the Ethernet power supply device 7. After processing, the first power signal after voltage regulation and step-down processing is output to the second input terminal L2 of the DC voltage conversion module 1 through the output terminal of the Ethernet power supply module 2. The DC voltage conversion module 1 receives the first power signal after voltage regulation and step-down processing, converts the first power signal after voltage regulation and step-down processing into a power supply signal with a preset voltage, and then outputs the power supply signal through the output terminal L3 of the DC voltage conversion module 1 to supply power to the electrical load.
[0051] When the electrical load fails, the short-circuit self-locking circuit in the Power over Ethernet module 2 disconnects the Power over Ethernet module 2 and stops outputting the first power signal after voltage regulation and step-down processing to the second input terminal L2 of the DC voltage conversion module 1.
[0052] In this embodiment, a DC-DC voltage conversion module 1 and an Ethernet power supply module 2 are provided in the power supply system. The DC-DC voltage conversion module 1 processes the first and second power signals after voltage regulation and step-down processing, and outputs a power supply signal with a preset voltage for use by different electrical loads. A short-circuit self-locking circuit is provided in the Ethernet power supply module 2. When an electrical load fails, the short-circuit self-locking circuit cuts off the power supply in time, thereby protecting the power supply system. The power supply system includes two power supply modules, DC-DC voltage conversion module 1 and Ethernet power supply module 2. Even if one of the power supply modules in the power supply system fails, the power supply system can still supply power to the electrical loads, improving the stability and safety of the power supply system.
[0053] In one embodiment, such as Figure 2 As shown, the Ethernet power supply module 2 further includes:
[0054] The power receiving controller 21 and the voltage regulator module 22 are configured such that the input terminal of the power receiving controller 21 serves as the input terminal of the Ethernet power supply module 2, the output terminal of the power receiving controller 21 is connected to the input terminal of the short-circuit self-locking circuit 23, the output terminal of the short-circuit self-locking circuit 23 is connected to the input terminal of the voltage regulator module 22, and the output terminal of the voltage regulator module 22 serves as the output terminal of the Ethernet power supply module 2.
[0055] The working process of the above power system is as follows:
[0056] The first input terminal L1 of the DC voltage conversion module 1 receives the second power signal through the external power supply 6, converts the second power signal into a power supply signal with a preset voltage, and then outputs the power supply signal through the output terminal L3 of the DC voltage conversion module 1 to supply power to the electrical load.
[0057] The input terminal of the power receiving end controller 21 receives the first power signal sent by the Ethernet power supply device 7, performs voltage reduction processing on the first power signal to obtain the voltage-reduced first power signal, and then outputs it to the input terminal of the short-circuit self-locking circuit 23 through the output terminal of the power receiving end controller 21. The output terminal of the short-circuit self-locking circuit 23 is then output to the input terminal of the voltage regulator module 22. The voltage regulator module 22 performs voltage regulation and further voltage reduction processing on the voltage-reduced first power signal, and then outputs it to the second input terminal L2 of the DC voltage conversion module 1 through the output terminal of the voltage regulator module 22. The DC voltage conversion module 1 converts the voltage-reduced and voltage-reduced first power signal into a power supply signal with a preset voltage, and then outputs the power supply signal through the output terminal L3 of the DC voltage conversion module 1 to supply power to the electrical load.
[0058] When the power load fails, the short-circuit self-locking circuit 23 in the Ethernet power supply module 2 disconnects the path from the voltage regulator module 22, stopping the output of the voltage regulator module 22 from outputting the first power signal after voltage regulation and step-down processing to the second input terminal L2 of the DC voltage conversion module 1.
[0059] In this embodiment, a DC-DC voltage conversion module 1 and an Ethernet power supply module 2 are provided in the power supply system. The DC-DC voltage conversion module 1 processes the second power signal and outputs a power supply signal with a preset voltage for use by different electrical loads. The Ethernet power supply module 2 is equipped with a power receiving controller 21, a voltage regulator module 22, and a short-circuit self-locking circuit 23. After the power receiving controller 21 steps down the first power signal, it is output to the voltage regulator module 22 through the short-circuit self-locking circuit 23. The voltage regulator module 22 performs voltage regulation and step-down processing before outputting it to the DC-DC voltage conversion module 1 for further processing and supplying power to the electrical loads. When the electrical load fails, the short-circuit self-locking circuit 23 promptly cuts off the second power signal, thus protecting the power supply system. The power supply system includes two power supply modules: the DC-DC voltage conversion module 1 and the Ethernet power supply module 2. Even if one of the power supply modules fails, the power supply system can still supply power to the electrical loads, improving the stability and safety of the power supply system.
[0060] In one embodiment, such as Figure 3 As shown, the Ethernet power supply module 2 further includes:
[0061] The system comprises a power receiving controller 21, a voltage regulator module 22, and a reverse polarity protection module 24. The input terminal of the power receiving controller 21 serves as the input terminal of the Ethernet power supply module 2. The output terminal of the power receiving controller 21 is connected to the input terminal of the short-circuit self-locking circuit 23. The output terminal of the short-circuit self-locking circuit 23 is connected to the input terminal of the voltage regulator module 22. The output terminal of the voltage regulator module 22 is connected to the input terminal of the reverse polarity protection module 24. The output terminal of the reverse polarity protection module 24 serves as the output terminal of the Ethernet power supply module 2.
[0062] The working process of the above power system is as follows:
[0063] The first input terminal L1 of the DC voltage conversion module 1 receives the second power signal through the external power supply 6, converts the second power signal into a power supply signal with a preset voltage, and then outputs the power supply signal through the output terminal L3 of the DC voltage conversion module 1 to supply power to the electrical load.
[0064] The input terminal of the power receiving end controller 21 receives the first power signal sent by the Ethernet power supply device 7, performs voltage reduction processing on the first power signal to obtain the voltage-reduced first power signal, and then outputs it to the input terminal of the short-circuit self-locking circuit 23 through the output terminal of the power receiving end controller 21. The output terminal of the short-circuit self-locking circuit 23 is then output to the input terminal of the voltage regulator module 22. The voltage regulator module 22 performs voltage regulation and further voltage reduction processing on the voltage-reduced first power signal, and then outputs it to the input terminal of the anti-reverse module 24 through the output terminal of the voltage regulator module 22. The output terminal of the anti-reverse module 24 is then output to the second input terminal L2 of the DC voltage conversion module 1. The DC voltage conversion module 1 converts the voltage-reduced and voltage-reduced first power signal into a power supply signal with a preset voltage, and then outputs the power supply signal through the output terminal L3 of the DC voltage conversion module 1 to supply power to the electrical load.
[0065] When the power load fails, the short-circuit self-locking circuit 23 in the Ethernet power supply module 2 disconnects the path from the voltage regulator module 22, stopping the output of the voltage regulator module 22 from outputting the first power signal after voltage regulation and step-down processing to the second input terminal L2 of the DC voltage conversion module 1. The anti-reverse module 24 is used to prevent the current of the power load from flowing back into the voltage regulator module 22 and causing damage to the voltage regulator module 22.
[0066] In this embodiment, a DC-DC voltage conversion module 1 and an Ethernet power supply module 2 are provided in the power supply system. The DC-DC voltage conversion module 1 processes the second power signal and outputs a power supply signal with a preset voltage for use by different electrical loads. The Ethernet power supply module 2 includes a power receiving controller 21, a voltage regulator module 22, a reverse protection module 24, and a short-circuit self-locking circuit 23. After the power receiving controller 21 steps down the first power signal, it is output to the voltage regulator module 22 through the short-circuit self-locking circuit 23. The voltage regulator module 22 performs voltage regulation and step-down processing, and then outputs the signal to the DC-DC voltage conversion module 1 through the reverse protection module 24 for processing and supply to the electrical loads. When a fault occurs in the electrical load, the short-circuit self-locking circuit 23 promptly cuts off the second power signal and prevents the current from flowing back into the voltage regulator module 22 and damaging it, thus protecting the power supply system and improving its stability and safety.
[0067] In one embodiment, such as Figure 3 As shown, the DC voltage conversion module 1 includes:
[0068] The DC-DC converter consists of a first DC-DC conversion submodule 11, a second DC-DC conversion submodule 12, a third DC-DC conversion submodule 13, and a fourth DC-DC conversion submodule 14. The input terminals of the first DC-DC conversion submodule 11 and the third DC-DC conversion submodule 13 both serve as the first input terminal L1 of the DC-DC voltage conversion module 1. The first output terminal P1 of the first DC-DC conversion submodule 11 is used to output a first power supply signal. The second output terminal P2 of the first DC-DC conversion submodule 11 is connected to the input terminal of the second DC-DC conversion submodule 12, and the output terminal of the second DC-DC conversion submodule 12 is used to output a second power supply signal. The first output terminal P3 of the third DC-DC conversion submodule 13 is used to output a third power supply signal. The second output terminal P4 of the third DC-DC conversion submodule 13 is connected to the input terminal of the fourth DC-DC conversion submodule 14, and the input terminal of the fourth DC-DC conversion submodule 14 serves as the second input terminal L2 of the DC-DC voltage conversion module 1. The output terminal of the fourth DC-DC conversion submodule 14 is used to output a fourth power supply signal.
[0069] In this embodiment, the DC voltage conversion module 1 is equipped with four DC conversion sub-modules, each outputting four different power supply signals to supply power to different electrical loads. Two, three, or more DC conversion sub-modules can also be used, adjusted according to the actual electrical load, all within the protection scope of this utility model. When four DC conversion sub-modules are used, the voltage of the first power supply signal output by the first DC conversion sub-module 11 is greater than the voltage of the second power supply signal output by the second DC conversion sub-module 12, the voltage of the second power supply signal output by the second DC conversion sub-module 12 is greater than the voltage of the third power supply signal output by the third DC conversion sub-module 13, and the voltage of the third power supply signal output by the third DC conversion sub-module 13 is greater than the voltage of the fourth power supply signal output by the fourth DC conversion sub-module 14.
[0070] The working process of the above power system is as follows:
[0071] The input terminal of the first DC-DC converter submodule 11 receives the first power signal from the external power supply 6. After step-down conversion, the first output terminal P1 of the first DC-DC converter submodule 11 outputs the first power supply signal to the electrical load. At the same time, the first power supply signal is output to the input terminal of the second DC-DC converter submodule 12 through the second output terminal P2 of the first DC-DC converter submodule 11.
[0072] After the second DC-DC conversion submodule 12 performs step-down conversion on the first power supply signal, it outputs the second power supply signal to the electrical load through the output terminal of the second DC-DC conversion submodule 12.
[0073] The input terminal of the third DC-DC converter submodule 13 receives the second power signal output by the Ethernet power supply module 2, performs step-down conversion on the second power signal, and then outputs the third power supply signal to the electrical load through the first output terminal P3 of the third DC-DC converter submodule 13. At the same time, the second output terminal P4 of the third DC-DC converter submodule 13 outputs the third power supply signal to the input terminal of the fourth DC-DC converter submodule 14; the output terminal of the Ethernet power supply module 2 outputs the first power signal after voltage regulation and step-down processing to the input terminal of the fourth DC-DC converter submodule 14.
[0074] The fourth DC-DC conversion submodule 14 performs step-down conversion on the third power supply signal and the first power supply signal after voltage regulation and step-down processing, and then outputs the fourth power supply signal to the power load through the output terminal of the fourth DC-DC conversion submodule 14.
[0075] Optionally, the first power supply signal can be 24V, the second power supply signal can be 12V, the third power supply signal can be 5V, and the fourth power supply signal can be 3.3V. The voltage of the power supply signal can be adjusted according to actual needs, all of which are within the protection scope of this utility model.
[0076] In this embodiment, the DC-DC conversion module 1 includes a first DC-DC conversion submodule 11, a second DC-DC conversion submodule 12, a third DC-DC conversion submodule 13, and a fourth DC-DC conversion submodule 14. These submodules process the first and second power supply signals and then output different power supply signals to supply power to different electrical loads. The system can be adjusted and optimized according to the needs of different loads, improving the power supply efficiency and meeting the requirements of various loads. When a submodule malfunctions, it can be easily replaced and maintained, improving maintenance efficiency.
[0077] In one embodiment, such as Figure 4 As shown, the short-circuit self-locking circuit 23 includes:
[0078] The first switching transistor 231, the first resistor module 232, the second resistor module 233, and the latch module 234;
[0079] One end of the first resistor module 232 serves as the input terminal of the short-circuit self-locking circuit 23 and is connected to the output terminal of the power receiving controller 21. The other end of the first resistor module 232 is connected to the input terminal of the first switching transistor 231. The output terminal of the first switching transistor 231 serves as the output terminal of the short-circuit self-locking circuit 23. The output terminal of the first switching transistor 231 is also connected to the first input terminal D1 of the latch module 234 through the second resistor module 233. The second input terminal D2 of the latch module 234 is connected to the output terminal of the power receiving controller 21. The output terminal D3 of the latch module 234 is connected to the control terminal of the first switching transistor 231.
[0080] The first switching transistor 231 is a PNP transistor, but it can also be other types of switching transistors. The input terminal, output terminal, and control terminal of the first switching transistor 231 correspond to the emitter, collector, and base of the PNP transistor, respectively. The first resistor module 232 and the second resistor module 233 can be a single resistor or multiple resistors connected in series, and can be adjusted according to the actual situation, all of which are within the protection scope of this utility model.
[0081] The latch module 234 is used to cut off the power supply path and maintain the power-off state in the event of a load short circuit or overcurrent, until manual intervention is required to release the power. The following is a description of the working principle of the latch module 234:
[0082] When the power system is running normally, the control terminal of the first switching transistor 231 is connected to ground through the latch module 234, and the first switching transistor 231 is turned on.
[0083] The input terminal of the first resistor module 232 receives the power signal (12VB) output by the power receiving terminal controller 21, and outputs it to the input terminal of the first switching transistor 231 through the output terminal of the first resistor module 232. The first resistor module 232 provides the bias of the control terminal of the first switching transistor 231, and then outputs it to the voltage regulator module 22 through the output terminal of the first switching transistor 231.
[0084] When the electrical load connected to the power system fails, the current from the input terminal to the output terminal of the first switching transistor 231 increases, the voltage difference rises rapidly, and the voltage at the output terminal drops rapidly. At this time, the latch module 234 is turned on, and a high voltage signal is output through the output D3 terminal of the latch module 234.
[0085] When the voltage at the control terminal of the first switch 231 rises, the voltage difference between the input terminal and the control terminal of the first switch 231 is less than the threshold voltage of the first switch 231, causing the first switch 231 to be turned off, thus forming a self-locking mechanism.
[0086] During the conduction period of the latch module 234, the voltage at the control terminal of the first switch transistor 231 is close to the voltage at the input terminal, so that the first switch transistor 231 is always in the off state. Even if the electrical load is restored to normal, the signal output by the output terminal D3 of the latch module 234 is still a high voltage signal, and the off state of the first switch transistor 231 cannot be changed. Only after the set delay time, when the signal output by the output terminal D3 of the latch module 234 becomes a low voltage signal, can the first switch transistor 231 be turned on and normal power supply resume.
[0087] In this embodiment, a first switching transistor 231, a first resistor module 232, a second resistor module 233, and a latching module 234 are configured in the short-circuit self-locking circuit 23. When the power system is operating normally, the power signal output by the power receiving controller 21 is output to the voltage regulator module 22 through the first switching transistor 231. When a fault occurs in the electrical load, the first switching transistor 231 is turned off, forming a self-locking mechanism to protect the circuit and improve the stability and safety of the power system.
[0088] In one embodiment, such as Figure 5 As shown, the latch module 234 includes:
[0089] The second switch 2341 and the delay module 2342 are used to determine the duration of the latch state and the recovery response, thereby achieving stable power-off and manually controllable reset after a fault. The input terminal of the second switch 2341 serves as the second input terminal D2 of the latch module 234, and the output terminal of the second switch 2341 is connected to the input terminal of the delay module 2342, serving as the output terminal D3 of the latch module 234. The control terminal of the second switch 2341 serves as the first input terminal D1 of the latch module 234, and the output terminal of the delay module 2342 is connected to ground. The delay module 2342 is used to determine the duration of the latch state and the recovery response, thereby achieving stable power-off and manually controllable reset after a fault.
[0090] The second switching transistor 2341 is a PNP transistor, but it can also be other types of switching transistors. It can be adjusted according to the actual situation, and all of them are within the protection scope of this utility model. The input terminal, output terminal and control terminal of the second switching transistor 2341 correspond to the emitter, collector and base of the PNP transistor, respectively.
[0091] The working process of the above power system is as follows:
[0092] When the power system is running normally, the control terminal of the first switching transistor 231 is connected to ground through the latch module 234, and the first switching transistor 231 is turned on.
[0093] The input terminal of the first resistor module 232 receives the power signal output by the power receiving terminal controller 21, outputs it to the input terminal of the first switching transistor 231 through the output terminal of the first resistor module 232, and then outputs it to the voltage regulator module 22 through the output terminal of the first switching transistor 231.
[0094] When a fault occurs in the electrical load connected to the power system, the current from the input to the output of the first switch 231 increases, the voltage difference rises rapidly, and the voltage at the output terminal drops rapidly; the voltage at the control terminal of the second switch 2341 drops rapidly, and the second switch 2341 begins to conduct until saturation; the voltage at the control terminal of the first switch 231 rises, and the voltage difference between the input and control terminals of the first switch 231 is less than the threshold voltage of the first switch 231, causing the first switch 231 to turn off, forming a self-locking mechanism;
[0095] The second switch 2341 is turned on, maintaining the bias current of the first switch 231. During this period, the voltage at the control terminal of the first switch 231 is close to the voltage at the input terminal, so that the first switch 231 is always in the off state and the electrical load has no voltage. Even if the electrical load returns to normal and the second switch 2341 is turned off, the signal output by the output terminal D3 of the latch module 234 is still a high voltage signal, and the off state of the first switch 231 cannot be changed. Only after the set delay time, when the signal output by the output terminal D3 of the latch module 234 becomes a low voltage signal, can the first switch 231 be turned on and normal power supply resume.
[0096] In this embodiment, a second switch 2341 and a delay module 2342 are configured in the short-circuit self-locking circuit 23. When a fault occurs in the electrical load, the power signal is led to ground through the second switch 2341, while the first switch 231 is turned off, forming a self-lock. Power can only be restored after the delay module 2342 has completely discharged. The short-circuit self-locking circuit 23 protects the power system, preventing the power system from operating with faults and improving the stability and safety of the power system.
[0097] In one embodiment, such as Figure 6 As shown, the short-circuit self-locking circuit 23 further includes:
[0098] The filter capacitor module 235 is connected at both ends to the output terminal of the power receiving controller 21 and the control terminal of the second switching transistor 2341, respectively.
[0099] The delay module 2342 includes:
[0100] The charging capacitor module 4 and the third resistor module 5 are connected in parallel. One end of the charging capacitor module 4 serves as the input terminal of the delay module 2342, and the other end of the charging capacitor module 4 serves as the output terminal of the delay module 2342.
[0101] Specifically, the filter capacitor module 235 includes capacitor C1 and may also include other components; the charging capacitor module 4 includes capacitor C2 and may also include other components; the third resistor module 5 includes resistor R2 and may also be several resistors connected in series, all of which can be adjusted as needed and are all within the protection scope of this utility model.
[0102] The working process of the above power system is as follows:
[0103] When the power system is running normally, the control terminal of the first switching transistor 231 is connected to ground through the third resistor module 5, and the first switching transistor 231 is turned on.
[0104] The filter capacitor module 235 filters the power signal (12VB) output by the power receiving controller 21 and buffers the conduction of the first switching transistor 231.
[0105] The input terminal of the first resistor module 232 receives the power signal output by the power receiving terminal controller 21, outputs it to the input terminal of the first switching transistor 231 through the output terminal of the first resistor module 232, and then outputs it to the voltage regulator module 22 through the output terminal of the first switching transistor 231.
[0106] When a fault occurs in the electrical load connected to the power system, the current from the input to the output of the first switch 231 increases, the voltage difference rises rapidly, and the voltage at the output terminal drops rapidly; the voltage at the control terminal of the second switch 2341 drops rapidly, and the second switch 2341 begins to conduct until saturation; the voltage at the control terminal of the first switch 231 rises, and the voltage difference between the input and control terminals of the first switch 231 is less than the threshold voltage of the first switch 231, causing the first switch 231 to turn off, forming a self-locking mechanism;
[0107] When the second switch 2341 is turned on, the voltage at the control terminal of the first switch 231 is close to the voltage at the input terminal and is in the off state. Even when the electrical load is restored to normal, the second switch 2341 is turned off, and the signal output by the output terminal D3 of the latch module 234 is still a high-voltage signal. The off state of the first switch 231 cannot be changed. Only after the set delay time, when the signal output by the output terminal D3 of the latch module 234 becomes a low-voltage signal, can the first switch 231 be turned on and normal power supply can resume.
[0108] The set delay time is related to the parameters of the charging capacitor module 4 and the third resistor module 5. During the set delay time, the charging capacitor module 4 discharges through the third resistor module 5.
[0109] In this embodiment, a filter capacitor module 235 is set in the short-circuit self-locking circuit 23 to filter the power signal output by the power receiving controller 21 and buffer the conduction of the first switching transistor 231. When the fault of the electrical load is restored, the power supply of the Ethernet power supply module 2 needs to be actively disconnected. Power supply can only be restored after the charging capacitor module 4 is fully discharged. The short-circuit self-locking circuit 23 protects the power system, prevents the power system from operating with faults, and improves the stability and safety of the power system.
[0110] In one embodiment, such as Figure 7 As shown, the short-circuit self-locking circuit 23 further includes:
[0111] Interference isolation module 236, the two ends of which are respectively connected to the negative terminal GNDB of the power receiving controller 21 and the negative terminal of the DC voltage conversion module 1.
[0112] The working process of the short-circuit self-locking circuit 23 is as follows:
[0113] When the electrical load fails or a component in the short-circuit self-locking circuit 23 is damaged, the current rises to the preset protection threshold of the interference isolation module 236 and disconnects, cutting off the input of the entire Ethernet power supply module 2.
[0114] Or, when the negative terminal of DC voltage conversion module 1 is not connected or is not connected sufficiently, the current from the negative terminal of DC voltage conversion module 1 will flow to the negative terminal of external Ethernet power supply device 7 because the current of the power supply system and the pulsating current generated by the electrical load need to flow back to ground, causing damage to the power supply system. The interference isolation module 236 cuts off the input of the entire Ethernet power supply module 2.
[0115] In this embodiment, an interference isolation module 236 is provided in the short-circuit self-locking circuit 23. When the electrical load fails or the negative terminal of the DC voltage conversion module 1 is not connected or is not sufficiently connected, the input of the entire Ethernet power supply module 2 is cut off. The interference isolation module 236 protects the power supply system and improves the stability and safety of the power supply system.
[0116] In one embodiment, such as Figure 7 As shown, the interference isolation module 236 includes:
[0117] An absorption capacitor module 2361 and a current limiting protection element 2362 are connected in parallel. One end of the absorption capacitor module 2361 and one end of the current limiting protection element 2362 both serve as one end of the interference isolation module 236, and the other end of the absorption capacitor module 2361 and the other end of the current limiting protection element 2362 both serve as the other end of the interference isolation module 236.
[0118] The absorption capacitor module 2361 may include capacitor C3 or other components; the current limiting protection element 2362 may be a self-resetting fuse S, or a circuit breaker and a fusible resistor, etc., as long as the requirements are met, all of which are within the protection scope of this utility model.
[0119] The working process of the above short-circuit self-locking circuit 23 is as follows:
[0120] The absorption capacitor module 2361 isolates part of the power supply oscillation, so that the negative terminal of the DC voltage conversion module 1 and the negative terminal of the Ethernet power supply device 7 do not interfere with each other.
[0121] When the electrical load fails or a component in the short-circuit self-locking circuit 23 is damaged, and the current rises to the preset protection threshold of the interference isolation module 236, the current limiting protection element 2362 disconnects, cutting off the input of the entire Ethernet power supply module 2.
[0122] Or, when the negative terminal of DC voltage conversion module 1 is not connected or is not connected sufficiently, the current from the negative terminal of DC voltage conversion module 1 will flow to the negative terminal of external Ethernet power supply device 7 because the current of the power supply system and the pulsating current generated by the load need to flow back to ground, causing damage to the power supply system. At this time, the current limiting protection element 2362 will also disconnect, cutting off the input of the entire Ethernet power supply module 2.
[0123] In this embodiment, an absorption capacitor module 2361 and a current-limiting protection element 2362 are provided in the short-circuit self-locking circuit 23. The absorption capacitor module 2361 isolates part of the power supply oscillation. When the electrical load fails or the negative terminal of the DC voltage conversion module 1 is not connected or is not sufficiently connected, the current-limiting protection element 2362 cuts off the input of the entire Ethernet power supply module 2. The interference isolation module 236 protects the power supply system, improving the stability and safety of the power supply system.
[0124] In one embodiment, a snow removal device is provided, wherein the power supply system of the snow removal device adopts the power supply system described above.
[0125] In addition to the power supply system, snow removal equipment may also include a motor module, a camera module, and a lighting module, all of which are powered by the power supply system.
[0126] In this embodiment, a power supply system is provided in the snow removal equipment. This system includes a DC-DC voltage conversion module and an Ethernet power supply module. The DC-DC voltage conversion module processes the first and second power signals, outputting a preset voltage power supply signal for use by different electrical loads. The Ethernet power supply module incorporates a short-circuit self-locking circuit. In the event of a load failure, the short-circuit self-locking circuit promptly cuts off the power supply, protecting the power supply system and improving its stability and safety.
[0127] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.
Claims
1. A power supply system characterized by comprising: The power supply system includes: A DC-DC voltage conversion module and an Ethernet power supply module are provided. The first input terminal of the DC-DC voltage conversion module is used to connect to an external power supply, and the second input terminal of the DC-DC voltage conversion module is connected to the output terminal of the Ethernet power supply module. The input terminal of the Ethernet power supply module is used to connect to an Ethernet power supply device. The Ethernet power supply module is used to acquire the first power signal sent by the Ethernet power supply device and output the first power signal to the second input terminal of the DC voltage conversion module. The DC voltage conversion module is used to acquire the first power signal and the second power signal sent by the external power supply and output a power supply signal from the output terminal of the DC voltage conversion module. The Ethernet power supply module is provided with a short-circuit self-locking circuit for detecting whether the output is short-circuited.
2. The power supply system according to claim 1, characterized by The Power over Ethernet module also includes: The system includes a power receiving controller and a voltage regulator module. The input terminal of the power receiving controller serves as the input terminal of the Ethernet power supply module. The output terminal of the power receiving controller is connected to the input terminal of the short-circuit self-locking circuit. The output terminal of the short-circuit self-locking circuit is connected to the input terminal of the voltage regulator module. The output terminal of the voltage regulator module serves as the output terminal of the Ethernet power supply module.
3. The power supply system of claim 1, wherein The Power over Ethernet module also includes: The system includes a power receiving controller, a voltage regulator module, and a reverse protection module. The input terminal of the power receiving controller serves as the input terminal of the Ethernet power supply module. The output terminal of the power receiving controller is connected to the input terminal of the short-circuit self-locking circuit. The output terminal of the short-circuit self-locking circuit is connected to the input terminal of the voltage regulator module. The output terminal of the voltage regulator module is connected to the input terminal of the reverse protection module. The output terminal of the reverse protection module serves as the output terminal of the Ethernet power supply module.
4. The power supply system according to any one of claims 1 to 3, characterized by, The DC voltage conversion module includes: The system comprises a first DC-DC converter submodule, a second DC-DC converter submodule, a third DC-DC converter submodule, and a fourth DC-DC converter submodule. The input terminal of the first DC-DC converter submodule serves as the first input terminal of the DC-DC voltage converter module. The first output terminal of the first DC-DC converter submodule is used to output a first power supply signal. The second output terminal of the first DC-DC converter submodule is connected to the input terminal of the second DC-DC converter submodule. The output terminal of the second DC-DC converter module is used to output a second power supply signal. The input terminal of the third DC-DC conversion submodule serves as the first input terminal of the DC-DC voltage conversion module. The first output terminal of the third DC-DC conversion submodule is used to output a third power supply signal. The second output terminal of the third DC-DC conversion submodule is connected to the input terminal of the fourth DC-DC conversion submodule. The input terminal of the fourth DC-DC conversion submodule serves as the second input terminal of the DC-DC voltage conversion module. The output terminal of the fourth DC-DC conversion submodule is used to output a fourth power supply signal.
5. The power supply system according to claim 2 or 3, characterized by The short-circuit self-locking circuit includes: The system comprises a first switching transistor, a first resistor module, a second resistor module, and a latching module. One end of the first resistor module is connected to the output of the power receiving controller and serves as the input of the short-circuit self-locking circuit. The other end of the first resistor module is connected to the input of the first switching transistor. The output of the first switching transistor serves as the output of the short-circuit self-locking circuit. The output of the first switching transistor is connected to the input of the second resistor module. The output of the second resistor module is connected to the first input of the latching module. The second input of the latching module is connected to the output of the power receiving controller. The output of the latching module is connected to the control terminal of the first switching transistor.
6. The power supply system of claim 5, wherein The latch module includes: The second switching transistor and the delay module are configured such that the input terminal of the second switching transistor serves as the second input terminal of the latch module, the output terminal of the second switching transistor is connected to the input terminal of the delay module, and the output terminal of the second switching transistor serves as the output terminal of the latch module. The control terminal of the second switching transistor serves as the first input terminal of the latch module, and the output terminal of the delay module is connected to ground.
7. The power supply system of claim 6, wherein The short-circuit self-locking circuit also includes: A filter capacitor module, the two ends of which are respectively connected to the output terminal of the power receiving controller and the control terminal of the second switching transistor; The delay module includes: A charging capacitor module and a third resistor module are connected in parallel. One end of the charging capacitor module and one end of the third resistor module serve as the input terminals of the delay module, and the other end of the charging capacitor module and the other end of the third resistor module serve as the output terminals of the delay module.
8. The power supply system of claim 5, wherein The short-circuit self-locking circuit also includes: An interference isolation module is provided, with its two ends connected to the negative terminal of the power receiving controller and the negative terminal of the DC voltage conversion module, respectively.
9. The power supply system of claim 8, wherein, The interference isolation module includes: An absorption capacitor module and a current limiting protection element are provided, and the absorption capacitor module and the current limiting protection element are connected in parallel. One end of the absorption capacitor module and one end of the current limiting protection element both serve as one end of the interference isolation module, and the other end of the absorption capacitor module and the other end of the current limiting protection element both serve as the other end of the interference isolation module.
10. A snow removing apparatus characterized by comprising: The power supply system of the snow removal equipment adopts the power supply system described in any one of claims 1 to 9.