A phase-to-phase wireless energy harvesting device

Abstract

The present invention discloses a wireless energy acquisition device, comprising: a high-voltage capacitor; a transmitting coil connected to the voltage capacitor; a receiving coil arranged opposite to the transmitting coil; and an isolation transformer connected to the receiving coil. The embodiment of the present invention is installed between the two-phase conductors of the transmission and distribution line, and the voltage and current levels applied to the transmitting coil are adjusted by cooperating with the high-voltage capacitors at both ends and the transmitting coil in the middle, so that a strong spatial electromagnetic field is generated in the transmitting coil. The energy of this electromagnetic field is then received by the low-voltage receiving coil, and after the voltage is adjusted by the isolation transformer, the primary high-voltage electric energy is transmitted to the secondary low-voltage electrical equipment for use. The present invention is a small-sized, high-precision wireless energy acquisition device that can obtain the electric energy required by the electrical equipment from the overhead distribution line. It is small in size, light in weight, easy to install and maintain, and meets the needs of the intelligent development of the power system.

Description

Technical Field

[0001] The present invention relates to the field of electrical equipment, and in particular to an inter-phase wireless energy harvesting device. Background Art

[0002] With the expansion of smart grid and condition-based maintenance technologies, future power grids will incorporate more information collection, transmission, and processing devices in addition to traditional power equipment. Power equipment condition monitoring devices, installed in high-voltage environments with strong magnetic and electric field radiation, offer powerful data detection, processing, and communication capabilities, but their power supply methods are relatively underdeveloped. Although many field devices are located near the power grid, they cannot directly draw power from the high-voltage grid due to voltage level limitations. The difficulty in finding the right power supply entry point or feeding method poses significant obstacles to the application of power equipment condition monitoring devices.

[0003] Voltage transformers based on electromagnetic sensing principles have an internal iron core, and their design incorporates overcurrent protection. This core's weight accounts for a significant portion of the product. Traditional voltage transformers are particularly heavy and bulky, making installation and maintenance more difficult. Long-term operation of switches under these loads can significantly impact mechanical life and safety. Furthermore, the presence of the iron core often causes ferromagnetic resonance, which can burn out the transformer and cause line failures.

[0004] Therefore, a technical solution for an energy-taking device is currently needed to solve the problems of heavy weight and bulky size of traditional voltage transformers, which make installation and maintenance inconvenient. The long-term operation of the switch under such load conditions has a great adverse impact on the mechanical life and safety, as well as the problems of ferromagnetic resonance and increased line leakage current caused by single-phase-to-ground capacitance lines. Summary of the Invention

[0005] The object of the present invention is to provide a phase-to-phase wireless energy harvesting device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a wireless energy harvesting device, comprising: a high-voltage capacitor; a transmitting coil connected to the voltage capacitor; a receiving coil arranged opposite to the transmitting coil; and an isolation transformer connected to the receiving coil.

[0007] Preferably, the transmitting coil is used to connect to a transmitting component.

[0008] Preferably, the transmitting coil is connected to the transmitting assembly via a connecting fitting.

[0009] Preferably, the high-voltage capacitor and the transmitting coil are molded by epoxy resin casting.

[0010] Preferably, the transmitting component is a transmitting component whose voltage is higher than a first preset value.

[0011] Preferably, the transmitting coil is arranged opposite to the receiving coil via a cylindrical pin.

[0012] Preferably, the cylindrical pin is made of insulating material.

[0013] Preferably, the receiving coil outputs electrical energy through an isolation transformer.

[0014] Preferably, the receiving coil and the isolation transformer are molded by epoxy resin casting.

[0015] The present invention has the following advantages and effects compared to the prior art:

[0016] Compared with the prior art, the embodiments of the present invention are a small, high-precision wireless energy harvesting device. This energy harvesting device has a unique and exquisite appearance and can obtain the electric energy required by the electrical device from the distribution overhead line. It is small in size, light in weight, easy to install and maintain, and meets the needs of the intelligent development of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 Schematic diagram of the circuit principle of the present invention;

[0019] In the figure: 1. High-voltage capacitor; 2. Transmitter coil; 3. Receiving coil; 4. Isolation transformer; 5. Connecting hardware; 6. Cylindrical pin. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] The technical problem to be solved by the present invention is to provide a technical solution for an energy-taking device to solve the problems of heavy weight and bulky volume of traditional voltage transformers, which make installation and maintenance inconvenient, and long-term operation of switches under such load conditions, which has a great adverse effect on mechanical life and safety, as well as the problems of ferromagnetic resonance and increased line leakage current caused by single-phase-to-ground capacitance lines.

[0022] See also Figures 1 to 2 , the present invention provides a technical solution:

[0023] A wireless energy harvesting device includes: a high-voltage capacitor 1; a transmitting coil 2 connected to the voltage capacitor 1; a receiving coil 3 disposed opposite the transmitting coil 2; and an isolation transformer 4 connected to the receiving coil 3. An external primary high-voltage transmitting assembly is installed between two phase conductors of a power transmission and distribution line via a connecting fitting 5. The voltage and current applied to the transmitting coil 2 are regulated and controlled by the high-voltage capacitor 1, ensuring that the transmitting coil 2 operates at normal levels. A low-voltage receiving coil 3 is installed on a crossarm of an iron frame, isolating the primary high-voltage transmitting assembly from the circuit and allowing for replacement at any time based on line operating conditions.

[0024] In the embodiment of the present invention, a primary high-voltage transmitting assembly is formed by casting a connecting hardware 5, a high-voltage capacitor 1, and a transmitting coil 2 with epoxy resin 7; the receiving coil 3 and the isolation transformer 5 are also cast with epoxy resin 7; the use of a single casting molding between the various components will improve the connection performance of the components, will not cause poor contact due to human installation problems, and has good safety.

[0025] In the embodiment of the present invention, the electric energy received by the low-voltage receiving coil 3 is regulated and outputted through the isolation transformer 4 ; when in use, the high-voltage current can be converted into a low-voltage current through the regulation of the isolation transformer 4 , making the current more stable.

[0026] In the embodiment of the present invention, the primary high-voltage transmitting assembly and the low-voltage receiving coil 3 are positioned and connected by an insulating cylindrical pin 6, and the position is precise and not easy to move, making the wireless energy acquisition process more stable and causing no additional waste of energy during the transmission process.

[0027] The electrical principle of the embodiment of the present invention is as follows Figure 2 As shown, it is installed between the two-phase conductors of the transmission and distribution line. The high-voltage capacitors at both ends work in conjunction with the transmitting coil in the middle to regulate the voltage and current levels applied to the transmitting coil, generating a strong spatial electromagnetic field in the transmitting coil. This electromagnetic field is then received by the low-voltage receiving coil, and after voltage regulation through the isolation transformer, the primary high-voltage electrical energy is transmitted to the secondary low-voltage electrical equipment for use.

[0028] Compared with the prior art, the embodiments of the present invention are a small, high-precision wireless energy harvesting device. This energy harvesting device has a unique and exquisite appearance and can obtain the electric energy required by the electrical device from the distribution overhead line. It is small in size, light in weight, easy to install and maintain, and meets the needs of the intelligent development of the power system.

[0029] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends", 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, 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.

[0030] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one such feature.

[0031] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0032] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A wireless energy harvesting device, characterized in that: include: A high-voltage capacitor (1); a transmitting coil (2) connected to the high-voltage capacitor (1); a receiving coil (3) disposed opposite to the transmitting coil (2); and an isolation transformer (4) connected to the receiving coil (3); The transmitting coil (2) is used to be connected to the transmitting component; The transmitting coil (2) is connected to the transmitting component via a connecting hardware (5); The high-voltage capacitor (1) and the transmitting coil (2) are molded by epoxy resin casting; The transmitting component has a voltage higher than a first preset value; The transmitting coil (2) is arranged relative to the receiving coil (3) via a cylindrical pin (6); The cylindrical pin (6) is made of insulating material; The receiving coil (3) outputs electric energy through an isolation transformer (4); the high-voltage current received by the receiving coil (3) is adjusted to a low-voltage current through the isolation transformer (4) for output; The receiving coil (3) and the isolation transformer (4) are cast by epoxy resin; The high-voltage transmitting assembly is formed by epoxy resin casting from a connecting hardware (5), a high-voltage capacitor (1), and a transmitting coil (2); the high-voltage transmitting assembly and the receiving coil (3) are positioned and connected by a cylindrical pin (6); The external primary high-voltage transmitting assembly is installed between the two-phase conductors of the power transmission and distribution line through a connecting hardware (5), and the voltage and current applied to the transmitting coil (2) are regulated and controlled by a high-voltage capacitor (1); the low-voltage receiving coil (3) is installed on the cross arm of the iron frame to form a circuit isolation with the primary high-voltage transmitting assembly; Among them, the wireless energy acquisition device is installed between the two-phase conductors of the transmission and distribution line. The high-voltage capacitors at both ends cooperate with the transmitting coil in the middle to adjust the voltage and current levels applied to the transmitting coil, so that a spatial electromagnetic field is generated in the transmitting coil. The energy of this electromagnetic field is received by the receiving coil, and after the voltage is adjusted by the isolation transformer, the primary high-voltage electric energy is transmitted to the secondary low-voltage electrical equipment for use.

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