Alternating current line optimization energy taking device and method for open-close type installation

Abstract

The invention provides an alternating-current circuit optimized energy taking device for open-close type installation, which is characterized in that two ends of a first magnetic semi-ring and two ends of a second magnetic semi-ring are connected through piezoelectric elements, and the two piezoelectric elements are connected in series through a wire and are connected with a rectifying circuit; an insulated wire winding is wound on the second magnetic semi-ring, one end of the insulated wire winding is in short circuit with the serially connected piezoelectric element and is connected to the common ground end of the rectifying circuit, and the other end of the insulated wire winding is connected to the rectifying input end of the rectifying circuit. The invention further provides an energy taking method of the alternating current line optimization energy taking device for open-close type installation. According to the invention, the two magnetic-conductive semi-rings are adopted so as to be suitable for open-close type installation, the two magnetic-conductive semi-rings are connected through the piezoelectric element, the electricity taking efficiency of an alternating current line is improved through magnetic-piezoelectric-electricity conversion, mechanical vibration generated by the magnetic-conductive element due to the magnetic pressure effect can be reduced based on the magnetostrictive effect and the piezoelectric effect, and the reliability of the magnetic-conductive element is improved. Therefore, demagnetization of the magnetic conductive element caused by mechanical vibration is relieved.

Description

Technical Field

[0001] The present invention relates to the field of smart grid equipment energy acquisition technology, and in particular to an AC line optimization energy acquisition device and method for open-close installation. Background Art

[0002] With the widespread promotion and application of intelligent power grid monitoring equipment, power supply of intelligent power grid monitoring equipment has become an important supporting technology. Existing patent: Application No. CN201220674016.7 A device for realizing power supply of intelligent power grid equipment, in particular, a device for realizing power supply of intelligent power grid equipment that can reduce the magnetic induction intensity of a magnetic ring. It includes: a transmission line (101), a magnetic core (102), a winding (103) on the magnetic core, a magnetic core winding switch (104), and an induction coil (105); the magnetic core (102) is composed of two semicircular magnetic cores, which are combined together to form a ring and are sleeved on the transmission line (101); the winding (103) on the magnetic core is wound on the magnetic core (102), and a magnetic core winding switch (104) is installed on the winding (103) on the magnetic core. By controlling the winding (103) on the magnetic core to install a magnetic core winding switch (104), when the current in the transmission line is large, the magnetic core winding switch (104) is closed to reduce the magnetic field strength in the magnetic ring; when the current in the transmission line is small, the magnetic core winding switch (104) is opened, thereby ensuring the normal operation of the smart grid equipment power supply realization device. The above-mentioned traditional power supply realization device has low AC line power supply efficiency. At the same time, due to the integral magnetic conductive core, it is generally impossible to install it on a laid line, so it cannot be used for open-close installation. Summary of the invention

[0003] In order to solve the above problems, the present invention aims to propose an AC line optimization energy extraction device and method for open-and-close installation, which adopts a magnetic half-ring divided into two halves and is suitable for open-and-close installation. The two magnetic half-rings are connected by a piezoelectric element, and the efficiency of AC line power extraction is improved by utilizing the magneto-piezo-electric conversion. Based on the magnetostrictive effect and the piezoelectric effect, the mechanical vibration of the magnetic element caused by the magneto-piezoelectric effect can be reduced, thereby alleviating the demagnetization of the magnetic element caused by the mechanical vibration.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] An AC line optimization energy collection device for open-and-close installation includes a first magnetic conductive half ring and a second magnetic conductive half ring, wherein both ends of the first magnetic conductive half ring and the second magnetic conductive half ring are connected via a piezoelectric element, and the two piezoelectric elements are connected in series via a wire and are connected to a rectifier circuit; an insulated wire winding is wound around the second magnetic conductive half ring, one end of the insulated wire winding is short-circuited with the series-connected piezoelectric element and connected to the common ground end of the rectifier circuit, and the other end is connected to the rectifier input end of the rectifier circuit.

[0006] Furthermore, the rectifier circuit is composed of D1, D2 and C1, and the rectifier input end includes D1 and D2.

[0007] Furthermore, two piezoelectric elements are used to convert the mechanical vibrations generated by the first magnetic conductive half ring and the second magnetic conductive half ring into alternating voltages, and are connected in series to D1 and the common ground terminal of the rectifier circuit.

[0008] Furthermore, one end of the insulated wire winding is short-circuited with the piezoelectric element connected in series and connected to the common ground end of the rectifier circuit, and the other end is connected to D2 of the rectifier circuit.

[0009] In order to achieve the above object, the present invention also provides an energy collection method for an AC line optimization energy collection device for open-close installation, comprising the following steps:

[0010] S1: The AC power supply topology is composed of the first magnetic semi-ring, the second magnetic semi-ring, two piezoelectric elements, an insulated wire winding, and a rectifier circuit;

[0011] S2: The first magnetic conductive half ring and the second magnetic conductive half ring with magnetic conductive properties convert the alternating current flowing through the magnetic ring into an alternating voltage of the insulated wire winding;

[0012] S3: The first magnetic semi-ring and the second magnetic semi-ring undergo longitudinal mechanical expansion and contraction under the action of the alternating current flowing through the magnetic rings, and the piezoelectric element generates an alternating voltage under the longitudinal mechanical expansion and contraction stress;

[0013] S4: The rectifier circuit converts the alternating voltage generated by the insulated wire winding and the piezoelectric element under the longitudinal mechanical stretching stress into a direct current voltage;

[0014] S5: The phase difference between the alternating voltage of the insulated wire winding and the alternating voltage generated by the piezoelectric element under the longitudinal mechanical tensile stress can be adjusted by adjusting the gap between the first magnetic conductive half ring, the second magnetic conductive half ring and the piezoelectric element or by filling the gap with non-rigid material.

[0015] Furthermore, by adjusting the gap between the first magnetic half ring, the second magnetic half ring and the piezoelectric element or filling the gap with non-rigid material, the piezoelectric element generates an alternating voltage U1 under alternating mechanical force, which has a phase difference of 180 degrees with the alternating voltage generated by the insulated wire winding.

[0016] Beneficial effects: The present invention adopts a magnetic half ring divided into two halves, which is suitable for open-and-close installation. The two magnetic half rings are connected by a piezoelectric element. The magneto-piezo-electric conversion is used to improve the efficiency of AC line power supply. Based on the magnetostrictive effect and the piezoelectric effect, the mechanical vibration of the magnetic element caused by the magneto-piezoelectric effect can be reduced, thereby alleviating the demagnetization of the magnetic element caused by the mechanical vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It is a structural schematic diagram of an AC line optimization energy extraction device for retractable installation according to an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of an alternating magnetic field when an alternating current I is present in a conductor passing through a first magnetic conductive half ring and a second magnetic conductive half ring of an AC line optimization energy extraction device for retractable installation according to an embodiment of the present invention;

[0020] Figure 3 A schematic diagram showing that the gap between the first magnetic conductive half ring and the second magnetic conductive half ring of the AC line optimization energy extraction device for retractable installation according to an embodiment of the present invention will produce an alternating elongation and shortening along the magnetic field direction;

[0021] Figure 4 This is a voltage waveform diagram of an unrectified AC line optimization energy extraction device for split-type installation according to an embodiment of the present invention;

[0022] Figure 5 This is a waveform diagram of the output voltage of the piezoelectric element of the AC line optimization energy extraction device for retractable installation according to an embodiment of the present invention after being rectified by D1;

[0023] Figure 6 This is a waveform diagram of the output voltage of the insulated wire winding of the AC line optimization energy extraction device for split-type installation according to an embodiment of the present invention after being rectified by D2;

[0024] Figure 7 This is a waveform diagram of the AC line optimization energy extraction device for split-type installation according to an embodiment of the present invention after rectification by D1 and D2 of the rectification circuit;

[0025] Figure 8 The AC line optimization energy acquisition device for retractable installation according to the embodiment of the present invention is filtered by C1 of the rectifier circuit to obtain a DC voltage;

[0026] Fig. 9 is a circuit schematic diagram of an insulated wire winding in a full-wave rectification mode in an embodiment of the present invention;

[0027] Fig.10 A circuit schematic diagram of the insulated wire winding and the piezoelectric element of the AC line optimization energy extraction device for split installation according to an embodiment of the present invention working in a rectification mode;

[0028] Fig.11 for Fig. 9 The output voltage waveform of the circuit in;

[0029] Fig.12 for Fig.10 The output voltage waveform of the circuit in . DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0031] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0032] Example 1

[0033] See also Figure 1 : An AC line optimization energy collection device for open-close installation, comprising a first magnetic half ring 1 and a second magnetic half ring 2, wherein both ends of the first magnetic half ring 1 and the second magnetic half ring 2 are connected via a piezoelectric element 3, and the two piezoelectric elements 3 are connected in series via a wire and are connected to a rectifier circuit 5; an insulated wire winding 4 is wound around the second magnetic half ring 2, one end of the insulated wire winding 4 is short-circuited with the series-connected piezoelectric element 3 and connected to the common ground end of the rectifier circuit 5, and the other end is connected to the rectifier input end of the rectifier circuit 5.

[0034] This embodiment uses a magnetic half ring divided into two halves, which is suitable for open-and-close installation. The two magnetic half rings are connected by a piezoelectric element. The magneto-piezo-electric conversion is used to improve the efficiency of power supply in the AC line. Based on the magnetostrictive effect and the piezoelectric effect, the mechanical vibration of the magnetic element caused by the magneto-piezoelectric effect can be reduced, thereby alleviating the demagnetization of the magnetic element caused by the mechanical vibration.

[0035] In a specific example, the rectifier circuit 5 is composed of D1, D2 and C1, and the rectifier input end includes D1 and D2.

[0036] In a specific example, two piezoelectric elements 3 are used to convert the mechanical vibrations generated by the first magnetic semi-ring 1 and the second magnetic semi-ring 2 into alternating voltages, and are connected in series to D1 and the common ground terminal of the rectifier circuit 5 .

[0037] In a specific example, one end of the insulated wire winding 4 is short-circuited with the piezoelectric element 3 connected in series and connected to the common ground end of the rectifier circuit 5 , and the other end is connected to D2 of the rectifier circuit 5 .

[0038] Example 2

[0039] In order to achieve the above-mentioned purpose, the present embodiment further provides an energy collection method for an AC line optimization energy collection device installed in a retractable manner, comprising the following steps:

[0040] S1: An AC power supply topology is composed of a first magnetic conductive half ring 1, a second magnetic conductive half ring 2, two piezoelectric elements 3, an insulated wire winding 4, and a rectifier circuit 5;

[0041] S2: The first magnetic conductive half ring 1 and the second magnetic conductive half ring 2 with magnetic conductive properties convert the alternating current flowing through the magnetic ring into an alternating voltage of the insulated wire winding 4;

[0042] S3: The first magnetic half ring 1 and the second magnetic half ring 2 undergo longitudinal mechanical expansion and contraction under the action of the alternating current flowing through the magnetic rings, and the piezoelectric element 3 generates an alternating voltage under the longitudinal mechanical expansion and contraction stress;

[0043] S4: the rectifier circuit 5 converts the alternating voltage of the insulated wire winding 4 and the alternating voltage generated by the piezoelectric element 3 under the longitudinal mechanical stretching stress into a direct current voltage;

[0044] S5: The phase difference between the alternating voltage of the insulated wire winding 4 and the alternating voltage generated by the piezoelectric element 3 under the longitudinal mechanical tensile stress can be adjusted by adjusting the gap between the first magnetic conductive half ring 1, the second magnetic conductive half ring 2 and the piezoelectric element 3 or filling the gap with non-rigid material.

[0045] In the specific implementation, Figure 2 As shown in FIG. 1 , when there is an alternating current I passing through the conductor of the first magnetic semi-ring and the second magnetic semi-ring, according to Ampere's law, the alternating magnetic field generated by the conductor at a certain moment is as follows: Figure 2 As shown in B. Since the direction of the current in the conductor changes alternately, the direction of the magnetic field B also changes alternately.

[0046] Since the magnetic material has a higher magnetic conductivity than the air medium, the alternating magnetic field strength in the first and second magnetic semi-rings is also higher than the magnetic field strength in the air. At the same time, according to the magnetostrictive effect, the gap between the first and second magnetic semi-rings will produce an alternating elongation and shortening along the direction of the magnetic field, such as Figure 3 If the two ends of the first magnetic half ring and the second magnetic half ring are fixed by mechanical means, the two piezoelectric elements clamped between the first magnetic half ring and the second magnetic half ring will generate an alternating voltage under the alternating mechanical force.

[0047] According to Ampere's law, under the action of an alternating magnetic field, an alternating voltage will be generated at the terminals of the insulated wire windings. Since the mechanical deformation of the first and second magnetic semi-rings along the magnetic field lags behind the change of the magnetic field, there is a phase difference between the alternating voltage generated by the piezoelectric element and the alternating voltage generated by the insulated wire windings, and the phase difference can be adjusted by adjusting the gap between the magnetic semi-rings and the piezoelectric element or filling the gap with non-rigid materials.

[0048] It is now assumed that by adjusting the gap between the first magnetic semi-ring, the second magnetic semi-ring and the piezoelectric element or filling the gap with non-rigid material, the alternating voltage U1 generated by the piezoelectric element under the alternating mechanical force has a phase difference of 180 degrees with the alternating voltage generated by the insulated wire winding. Figure 4 is the unrectified voltage waveform, Figure 5 is the waveform of the piezoelectric element output voltage after rectification by D1, Figure 6 The waveform of the output voltage of the insulated wire winding after being rectified by D2 becomes as follows after being rectified by D1 and D2 of the rectifier circuit: Figure 7 As shown, the DC voltage obtained after filtering by C1 of the rectifier circuit is as follows Figure 8 shown.

[0049] In a specific example, the gap between the first magnetic half ring 1, the second magnetic half ring 2 and the piezoelectric element 3 is adjusted or a non-rigid material is filled in the gap so that the piezoelectric element 3 generates an alternating voltage U1 under alternating mechanical force and there is a phase difference of 180 degrees between the alternating voltage generated by the insulated wire winding 4.

[0050] When the alternating voltage U1 generated by the piezoelectric element under the alternating mechanical force has a phase difference of 180 degrees with the alternating voltage generated by the insulated wire winding, the energy extraction efficiency of the AC line optimization energy extraction device for open-close installation is the highest.

[0051] The energy collection method of the AC line optimization energy collection device for retractable installation in this embodiment is verified to have better energy collection efficiency than the prior art as follows:

[0052] Assume that by adjusting the number of turns of the insulated wire winding and the gap between the piezoelectric elements, the amplitude of the output voltage of both is 20V. Due to the influence of parasitic parameters between the insulated wire winding and the first magnetic semi-ring, the second magnetic semi-ring and the wire, the output waveform of the insulated wire winding can be obtained through simulation to obtain the rectified DC voltage value.

[0053] Fig. 9 and Fig.10 It is a circuit schematic diagram of the insulated wire winding in full-wave rectification mode, and a circuit schematic diagram of the insulated wire winding and the piezoelectric element working in rectification mode.

[0054] Through simulation, we can get Fig.11 and Fig.12 The waveform of Fig.11 The output voltage Uo is the rectified output voltage Uc of the insulated wire winding, and its value is about 8.70V. Fig.12 The voltage Uo after rectification of the output voltage Uc and Up of the insulated wire winding and the piezoelectric element is about 18.95V. Fig. 9 D1~D2 and Fig.10 D1~D4 are all 1N1183, C1 is 680uF, and the load is 500 ohms.

[0055] Can be obtained, Fig. 9 The output power of the circuit is

[0056] P=U 2 / R=8.7 2 / 500 = 0.1514W

[0057] Fig.10 The output power of the circuit is

[0058] P=U 2 / R=18.95 2 / 500=0.7182W

[0059] It can be seen from the simulation waveform that due to the parasitic parameters between the insulated wire winding, the magnetic semi-ring and the wire, the output voltage of the insulated wire winding is seriously distorted, which restricts its energy extraction efficiency. The energy extraction method of this embodiment effectively improves the energy extraction efficiency under the AC line.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An AC line optimization energy extraction device for open-close installation, characterized in that: The invention comprises a first magnetic conductive half ring (1) and a second magnetic conductive half ring (2), wherein both ends of the first magnetic conductive half ring (1) and the second magnetic conductive half ring (2) are connected via a piezoelectric element (3), and the two piezoelectric elements (3) are connected in series via a wire and are connected to a rectifier circuit (5); an insulated wire winding (4) is wound around the second magnetic conductive half ring (2), one end of the insulated wire winding (4) is short-circuited with the piezoelectric element (3) connected in series and connected to the common ground end of the rectifier circuit (5), and the other end is connected to the rectifier input end of the rectifier circuit (5).

2. The AC line optimization energy extraction device for retractable installation according to claim 1, characterized in that: The rectifier circuit (5) is composed of D1, D2 and C1, and the rectifier input end includes D1 and D2.

3. The AC line optimization energy extraction device for retractable installation according to claim 2, characterized in that: The two piezoelectric elements (3) are used to convert the mechanical vibration generated by the first magnetic conductive half ring (1) and the second magnetic conductive half ring (2) into an alternating voltage, and are connected in series to D1 and a common ground terminal of a rectifier circuit (5).

4. The AC line optimization energy extraction device for retractable installation according to claim 2, characterized in that: One end of the insulated wire winding (4) is short-circuited with the piezoelectric element (3) connected in series and connected to the common ground end of the rectifier circuit (5), and the other end is connected to D2 of the rectifier circuit (5).

5. A method for obtaining energy from an AC line optimized energy obtaining device for open-close installation, characterized in that: The following steps are involved: S1: An AC power supply topology is composed of a first magnetic conductive half ring (1), a second magnetic conductive half ring (2), two piezoelectric elements (3), an insulated wire winding (4), and a rectifier circuit (5); S2: The first magnetic conductive half ring (1) and the second magnetic conductive half ring (2) with magnetic conductive properties convert the alternating current flowing through the magnetic ring into an alternating voltage of the insulated wire winding (4); S3: the first magnetic semi-ring (1) and the second magnetic semi-ring (2) undergo longitudinal mechanical expansion and contraction under the action of the alternating current flowing through the magnetic rings, and the piezoelectric element (3) generates an alternating voltage under the longitudinal mechanical expansion and contraction stress; S4: The rectifier circuit (5) converts the alternating voltage of the insulated wire winding (4) and the alternating voltage generated by the piezoelectric element (3) under longitudinal mechanical stretching stress into a direct current voltage; S5: The phase difference between the alternating voltage of the insulated wire winding (4) and the alternating voltage generated by the piezoelectric element (3) under longitudinal mechanical expansion and contraction stress can be adjusted by adjusting the gap between the first magnetic conductive half ring (1), the second magnetic conductive half ring (2) and the piezoelectric element (3) or by filling the gap with a non-rigid material.

6. The energy collection method of the AC line optimization energy collection device for open-close installation according to claim 5, characterized in that: The gap between the first magnetic conductive half ring (1), the second magnetic conductive half ring (2) and the piezoelectric element (3) is adjusted or a non-rigid material is filled in the gap so that the alternating voltage U1 generated by the piezoelectric element (3) under the alternating mechanical force has a phase difference of 180 degrees with the alternating voltage generated by the insulated wire winding (4).

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