Capacitive power taking device and capacitive voltage-dividing power taking circuit

Abstract

The utility model relates to a capacitance type electricity taking device and a capacitance voltage dividing type electricity taking circuit, electricity is taken and input from a high-voltage input end and output from a low-voltage output end, the capacitance type electricity taking device comprises a capacitance connecting body and a base, the capacitance connecting body is installed on the base, and one end of the capacitance connecting body is electrically connected with the input end. And the capacitor connector is formed by potting. One end of the base is electrically connected with the output end. And a plurality of layers of umbrella skirts surround the protective layer. The utility model also provides a capacitive voltage division type power taking circuit, which comprises an energy taking capacitor, a voltage transformation module and a conversion module, and the first end of the energy taking capacitor is connected with the input voltage of the high-voltage power supply. The second end of the energy-taking capacitor is connected with the first end of the voltage transformation module, and the voltage transformation module reduces the high voltage passing through the energy-taking capacitor to the required output voltage. The second end of the voltage transformation module is connected with the first end of the rectification unit, the second end of the rectification unit is connected with the voltage stabilization unit, and the rectification unit rectifies the voltage after voltage reduction into direct current; the voltage stabilizing unit forms direct-current voltage or alternating-current voltage through the rectifying unit.

Description

Technical Field

[0001] The utility model belongs to the field of electric power, and in particular relates to a capacitive power taking device and a capacitive voltage dividing power taking circuit. Background Art

[0002] With the intelligent transformation of my country's power transmission, power supply and distribution equipment, as an important part of the power grid, should fully reflect the characteristics and needs of "intelligence, automation and miniaturization". Therefore, electronic transformers, high-voltage electric energy meters, online temperature rise detection devices, etc. using advanced electronic technology have also come into being. In order to ensure the long-term safe, reliable and stable operation of the above equipment, the problem of high-voltage side power supply must be solved. At present, there are mainly the following ways to obtain power on the high-voltage side: 1. The current transformer (CT) senses the voltage from the busbar, and after rectification, filtering, voltage stabilization and other subsequent circuit processing, it provides power to the high-voltage side electronic equipment. 2. Laser is used to transmit light energy from the low-voltage side to the high-voltage side through optical fiber, and the equipment is powered after photoelectric conversion, AC-DC conversion and other processing. 3. A combined power supply system consisting of solar cells and rechargeable batteries is used. 4. High-power power supply devices obtain power.

[0003] In practice, when a high-power power supply device is used, the local discharge is too large, which causes large interference errors to the subsequent processing circuits and sensors. Summary of the invention

[0004] The purpose of the present invention is to provide a capacitive power taking device and a capacitive voltage dividing power taking circuit, aiming to solve the above problems.

[0005] To achieve the above-mentioned purpose, the present invention provides a capacitive power-taking device, which takes power input from a high-voltage input terminal and outputs power from a low-voltage output terminal, including a potted capacitor connector and a base, the capacitor connector is installed on the base, and one end of the capacitor connector is electrically connected to the input terminal. One end of the base is electrically connected to the output terminal. The outer surface of the capacitor connector is also covered with a protective layer. The protective layer is surrounded by several layers of umbrella skirts, which are evenly distributed up and down. The lower end of the capacitor connector is also expanded outward to form a connecting portion, and the outermost end of the connecting portion is shorter than the outermost end of the umbrella skirt.

[0006] Furthermore, a potting pressure ring is provided on the head of the capacitor connecting body, and the capacitor connecting body passes through the middle end of the pressure ring and is connected to the input end.

[0007] Furthermore, the capacitor connector is connected to the base via a fastener; the bottom of the capacitor connector is provided with a plurality of mounting holes, and the fastener passes through the top wall of the base from bottom to top and extends into the mounting holes to be locked and connected therewith.

[0008] Furthermore, the pressure ring is made of aluminum alloy or stainless steel.

[0009] Furthermore, a locking portion extends outward from the bottom end of the base, and a plurality of connecting grooves with notches are provided on the locking portion.

[0010] Further, the shielding layer is made of an insulating resin material.

[0011] Further, the shed is made of insulating resin material.

[0012] Furthermore, the capacitor connecting body is integrally formed of ceramic material.

[0013] The present invention also provides a capacitor voltage-dividing power-taking circuit, including an energy-taking capacitor, a transformer module, and a conversion module. The first end of the energy-taking capacitor is connected to a high-voltage power supply. The second end of the energy-taking capacitor is connected to the first end of the transformer module, and the transformer module reduces the high voltage passing through the energy-taking capacitor to a required voltage. The conversion module includes a rectifier unit and a voltage stabilizing unit. The second end of the transformer module is connected to the first end of the rectifier unit, and the second end of the rectifier unit is connected to the voltage stabilizing unit. The rectifier unit rectifies the stepped-down voltage into direct current; the voltage stabilizing unit forms a direct current voltage waveform or an alternating current voltage waveform after being stabilized by the rectifier unit.

[0014] Furthermore, the transformer module uses a voltage transformer for isolation transformer.

[0015] The above one or more technical solutions in a capacitive power taking device and a capacitive voltage dividing power taking circuit provided by the embodiment of the utility model have at least the following technical effects:

[0016] In the present invention, the capacitive power taking device takes power at the high voltage input end. By setting a protective layer on the capacitor connector and surrounding a plurality of layers of shed skirts on the protective layer, the insulation performance and mechanical strength of the device can be effectively improved to prevent electrical breakdown or leakage in a high voltage environment, thereby enhancing the safety of the equipment. In addition, the capacitive voltage-dividing power taking circuit takes power from the high voltage power supply, divides the voltage of the energy-taking capacitor, and then rectifies the AC voltage into DC power through a rectifying unit, and then stabilizes the waveform by a voltage stabilizing unit to ensure that the output is at the rated voltage and the power output of the temperature is guaranteed, providing a reliable energy supply for the secondary control circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 A structural diagram of a capacitive power extraction device provided in an embodiment of the utility model.

[0019] Figure 2 A cross-sectional view of a capacitive power extraction device provided in an embodiment of the utility model.

[0020] Figure 3 A top view of a capacitive power extraction device provided in an embodiment of the utility model.

[0021] Figure 4 This is a structural principle diagram of a capacitive voltage-dividing power-taking circuit provided in an embodiment of the utility model.

[0022] Figure 5 A flow chart of a capacitive voltage-dividing power-taking circuit provided in an embodiment of the utility model.

[0023] Explanation of main figure numerals: 100, input end; 110, output end; 120, capacitor connector; 130, base; 140, protective layer; 150, umbrella skirt; 160, pressure ring; 170, mounting hole; 180, connecting groove; 190, connecting part. DETAILED DESCRIPTION

[0024] The following describes the embodiments of the present invention in detail. Figures 1 to 5 , wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. Figures 1 to 5 The described embodiments are exemplary and are intended to be used to explain the embodiments of the present invention, but should not be construed as limiting the present invention.

[0025] In the description of the embodiments 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 embodiments of the present invention and simplifying the description, rather than indicating or implying 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.

[0026] 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 embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0027] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" 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 embodiments of the present invention can be understood according to specific circumstances.

[0028] In the embodiment of the utility model, this case provides a capacitive power taking device, such as Figures 1 to 3 As shown, the power input is taken from the high-voltage input terminal 100 and outputted from the low-voltage output terminal 110, including a capacitor connector 120 and a base 130, the capacitor connector 120 is mounted on the base 130, and one end of the capacitor connector 120 is electrically connected to the input terminal 100. The capacitor connector 120 is potted. One end of the base 130 is electrically connected to the output terminal 110. The outer surface of the capacitor connector 120 is also covered with a protective layer 140. The protective layer 140 is surrounded by several layers of umbrella skirts 150, and the umbrella skirts 150 are evenly distributed up and down. The lower end of the capacitor connector 120 is also expanded outward to form a connecting portion 190, and the outermost end of the connecting portion 190 is shorter than the outermost end of the umbrella skirt 150. Specifically, the low-voltage output terminal 110 is a capacitive power-taking device that takes power at high voltage and outputs at low voltage. By providing a protective layer 140 on the capacitor connector 120, the wear resistance and anti-aging ability of the protective layer 140 can be enhanced, so that the capacitive power-taking device can maintain good performance during long-term use. Several layers of umbrella skirts 150 are surrounded on the protective layer 140. The umbrella skirts 150 can effectively improve the insulation performance and mechanical strength of the device, prevent electrical breakdown or leakage in a high-voltage environment, thereby enhancing the safety of the device. A connecting portion 190 is provided, and the contact area between the connecting portion 190 and the base 130 is wider, providing a stable connection structure, making the connection more secure, thereby improving the stability of the entire system.

[0029] In another embodiment of the utility model, Figures 1 to 3 As shown, the head of the capacitor connector 120 is provided with a pressure ring 160, and the capacitor connector 120 passes through the middle end of the pressure ring 160 and is connected to the input end 100. The pressure ring 160 provides a limiting space, thereby ensuring a tight connection between the capacitor connector 120 and the input end 100, and preventing rainwater from penetrating while stably connecting to the input end 100. The pressure ring 160 is made of aluminum alloy or stainless steel, and the stainless steel material is known for its high corrosion resistance, high strength and heat resistance. The pressure ring 160 made of stainless steel can ensure stable performance in harsh environments and extend the service life.

[0030] In another embodiment of the utility model, Figures 1 to 3 As shown, the capacitor connector 120 is connected to the base 130 through a fastener; the bottom of the capacitor connector 120 is formed with a plurality of mounting holes 170, and the fastener passes through the top wall of the base 130 from bottom to top, and extends into the mounting hole 170 to be locked and connected thereto. By having the fastener pass through the top wall of the base 130 from bottom to top and extend into the mounting hole 170 of the capacitor connector 120, this connection method can ensure a tight connection between the capacitor connector 120 and the base 130, and enhance the stability of the connection. In harsh working environments such as high pressure and high vibration, this stable connection can ensure long-term stable operation of the system. In addition, the design allows the fastener to be passed through the base 130 from below and locked with the mounting hole 170 above, making the installation and disassembly process simple and quick.

[0031] In another embodiment of the utility model, Figures 1 to 3 As shown, a locking portion extends outward from the bottom end of the base 130, and a connecting groove 180 with a plurality of notches is provided on the locking portion. Installation through the connecting groove 180 can make the installation process more intuitive and simple. The installer only needs to pass the fastener through the connecting groove 180 and fix it to the installation surface, without complicated installation steps or tools, thereby improving the installation efficiency.

[0032] In another embodiment of the utility model, Figures 1 to 3 As shown, the protective layer 140 and the shed 150 are both made of insulating resin material. The insulating resin material has excellent insulation performance. When the protective layer 140 and the shed 150 are both made of insulating resin material, they can effectively isolate the current and prevent current leakage or short circuit, thereby ensuring the safe operation of the equipment.

[0033] In another embodiment of the utility model, Figures 1 to 3 As shown, the capacitor connection body is integrally formed of ceramic material. High-quality ceramic material has low dielectric loss, which helps to reduce energy loss in the capacitor and improve circuit efficiency.

[0034] This embodiment also provides a capacitor voltage-dividing power circuit, such as Figures 4-5As shown, it includes an energy-taking capacitor, a transformer module and a conversion module. The first end of the energy-taking capacitor is connected to the input voltage of the high-voltage power supply. The second end of the energy-taking capacitor is connected to the first end of the transformer module, and the transformer module reduces the high voltage passing through the energy-taking capacitor to the required output voltage. The energy-taking capacitor is a CL capacitor. The conversion module includes a rectifier unit and a voltage stabilizing unit. The second end of the transformer module is connected to the first end of the rectifier unit, and the second end of the rectifier unit is connected to the voltage stabilizing unit. The rectifier unit rectifies the stepped-down voltage into direct current; the voltage stabilizing unit forms a stable direct current voltage waveform or alternating current voltage waveform through the rectifier unit. Specifically, the standard voltage of the high-voltage input power supply is 10KV. The energy-taking capacitor has a high withstand voltage and is not easy to break down. The CL voltage-dividing principle is adopted to appropriately attenuate the larger input voltage to obtain an output voltage smaller than the input voltage. The output voltage is then isolated and divided by the transformer module to form an alternating current voltage of 28V. The transformer module is not an ordinary transformer, but a voltage transformer. The main purpose is not to facilitate the transmission of electric energy, but to power measuring instruments and relay protection devices. The 28V AC voltage is rectified by the rectifier unit to become a 28V DC voltage. The rectifier unit can select different rectifier circuits according to the current characteristics, such as half-wave rectification, bridge rectification, full-wave rectification, voltage doubling rectification, etc. Then, the output DC voltage or AC voltage is stabilized by the voltage stabilizing unit to ensure that the output is at the rated voltage and the power output at the temperature, providing a reliable energy supply for the secondary control circuit. The effects achieved in this way are: optimizing the electric field interference between the power taking device and the sensor, ensuring that the voltage sampling signal is not distorted, and the voltage sampling and power taking capacitors are built into the same module without being affected.

[0035] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A capacitive power supply device, which takes power from a high voltage input terminal and outputs power from a low voltage output terminal, characterized in that: It comprises a potting-molded capacitor connector and a base, wherein the capacitor connector is mounted on the base, and the capacitor connector is electrically connected to the input end; the base is electrically connected to the output end; the outer surface of the capacitor connector is also covered with a protective layer; the protective layer is surrounded by a plurality of layers of umbrella skirts, and the umbrella skirts are evenly distributed up and down; the lower end of the capacitor connector is also expanded outward to form a connecting portion, and the outermost end of the connecting portion is shorter than the outermost end of the umbrella skirt.

2. The capacitive power extraction device according to claim 1, characterized in that: The capacitor connecting body is connected to the base through a fastener; the bottom of the capacitor connecting body is provided with a plurality of mounting holes, and the fasteners pass through the top wall of the base in sequence from bottom to top and extend into the mounting holes to be locked and connected therewith.

3. The capacitive power extraction device according to claim 1, characterized in that: A locking portion is extended outwardly from the bottom end of the base, and a plurality of connecting grooves with notches are arranged on the locking portion.

4. The capacitive power extraction device according to claim 1, characterized in that: The head of the capacitor connecting body is provided with a potting pressure ring, and the capacitor connecting body passes through the middle end of the pressure ring and is connected to the input end.

5. The capacitive power extraction device according to claim 4, characterized in that: The pressing ring is made of aluminum alloy or stainless steel.

6. The capacitive power extraction device according to any one of claims 1 to 5, characterized in that: The protective layer is made of insulating resin material, and the umbrella skirt is made of insulating resin material.

7. The capacitive power extraction device according to any one of claims 1 to 5, characterized in that: The capacitor connecting body is integrally formed of ceramic material.

8. A capacitive voltage-dividing power-taking circuit, characterized in that: It also includes the capacitive power extraction device according to any one of claims 1-7.

9. The capacitive voltage division power taking circuit according to claim 8, characterized in that: It includes an energy-taking capacitor, a transformer module and a conversion module, wherein the first end of the energy-taking capacitor is connected to a high-voltage power supply; the second end of the energy-taking capacitor is connected to the first end of the transformer module, and the transformer module reduces the high voltage passing through the energy-taking capacitor to a required voltage; the conversion module includes a rectifier unit and a voltage stabilizing unit, the second end of the transformer module is connected to the first end of the rectifier unit, the second end of the rectifier unit is connected to the voltage stabilizing unit, and the rectifier unit rectifies the reduced voltage into direct current; the voltage stabilizing unit forms a stable direct current voltage waveform or alternating current voltage waveform after passing through the rectifier unit.

10. The capacitive voltage division power taking circuit according to claim 9, characterized in that: The transformer module uses a voltage transformer to perform isolation transformer.

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