An AC line optimized power supply device and method for open-close mounting

Abstract

The application provides an alternating current line optimized power taking device for open-close type installation, piezoelectric elements are connected between two ends of a first magnetic conducting half ring and a second magnetic conducting half ring, the two piezoelectric elements are connected in series through a wire and are connected with a rectifier circuit; an insulating wire winding is wound on the second magnetic conducting half ring, one end of the insulating wire winding is short-circuited with the piezoelectric elements connected in series and is connected with a common ground end of the rectifier circuit, and the other end is connected with a rectifier input end of the rectifier circuit. The application also provides a power taking method of the alternating current line optimized power taking device for open-close type installation. The application adopts two magnetic conducting half rings to be suitable for open-close type installation, the two magnetic conducting half rings are connected through piezoelectric elements, the conversion of magnetism-piezoelectricity-electricity is used to improve the efficiency of alternating current line power taking, and the mechanical vibration of the magnetic conducting element caused by the magnetic piezoelectric effect can be reduced based on the magnetostriction effect and the piezoelectric effect, and then the demagnetization of the magnetic conducting element caused by the mechanical vibration is relieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of smart grid device power taking, in particular to an alternating current line optimized power taking device and method for open-close type installation. BACKGROUND

[0002] With the wide promotion and application of smart grid intelligent monitoring devices, power taking of the smart grid intelligent monitoring devices becomes an important supporting technology. The existing patent: application number CN201220674016.7, an intelligent power grid device power taking implementation device, in particular to an intelligent power grid device power taking implementation device capable of reducing the magnetic induction intensity of a magnetic ring. It comprises: a power 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 half-circular magnetic cores combined to form a circular ring and is sleeved on the power transmission line (101). The winding (103) on the magnetic core is wound on the magnetic core (102), and the winding (103) on the magnetic core is provided with a magnetic core winding switch (104). By controlling the winding (103) on the magnetic core to be provided with a magnetic core winding switch (104), when the current in the power transmission line is large, the magnetic core winding switch (104) is closed to reduce the magnetic field intensity in the magnetic ring; when the current in the power transmission line is small, the magnetic core winding switch (104) is opened, thereby ensuring the normal work of the intelligent power grid device power taking implementation device. The above-mentioned traditional power taking implementation device has low efficiency of alternating current line power taking, and since it is a whole magnetic core, it is generally not possible to install on a laid line, thereby being unable to be used for open-close type installation. SUMMARY

[0003] To solve the above problems, the present application aims to provide an alternating current line optimized power taking device and method for open-close type installation, which adopts two half magnetic conductive rings to be suitable for open-close type installation, and piezoelectric elements are used to connect the two magnetic conductive half rings, the magnetic-piezoelectric-electric conversion is used to improve the efficiency of alternating current line power taking, and the magnetostriction effect and piezoelectric effect can reduce the mechanical vibration of the magnetic conductive element caused by the magnetic piezoelectric effect, thereby relieving the demagnetization of the magnetic conductive element caused by the mechanical vibration.

[0004] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0005] An alternating current line optimized power taking device for open-close type installation, comprising a first magnetic conductive half ring and a second magnetic conductive half ring, the two ends of the first magnetic conductive half ring and the second magnetic conductive half ring are connected by piezoelectric elements, the two piezoelectric elements are connected in series by a wire and are connected with a rectifier circuit; an insulating wire winding is wound on the second magnetic conductive half ring, one end of the insulating wire winding is short-circuited with the series-connected piezoelectric elements and is 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] Further, the rectifier circuit is composed of D1, D2 and C1, and the rectifier input end comprises D1 and D2.

[0007] Further, the two piezoelectric elements are used to convert the mechanical vibration generated by the first magnetic conduction half ring and the second magnetic conduction half ring into alternating voltage, and are connected in series and connected to the D1 of the rectifier circuit and the common ground end.

[0008] Further, 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 D2 of the rectifier circuit.

[0009] In order to achieve the above purpose, the application also provides a power taking method of an open-close mounted alternating current line optimized power taking device, comprising the following steps:

[0010] S1: the alternating current power taking topology is composed of the first magnetic conduction half ring, the second magnetic conduction half ring, the two piezoelectric elements, the insulated wire winding and the rectifier circuit;

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

[0012] S3: the first magnetic conduction half ring and the second magnetic conduction half ring generate longitudinal mechanical expansion and contraction under the action of the alternating current flowing through the magnetic ring, and the piezoelectric element generates alternating voltage under the longitudinal mechanical expansion and contraction stress;

[0013] S4: the rectifier circuit converts the alternating voltage of the insulated wire winding and the alternating voltage generated by the piezoelectric element under the longitudinal mechanical expansion and contraction stress into 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 expansion and contraction stress can be adjusted by adjusting the gap between the first magnetic conduction half ring, the second magnetic conduction half ring and the piezoelectric element or filling non-rigid material in the gap.

[0015] Further, the gap between the first magnetic conduction half ring, the second magnetic conduction half ring and the piezoelectric element is adjusted or non-rigid material is filled in the gap to make the piezoelectric element generate alternating voltage U1 under the alternating mechanical force and the alternating voltage generated by the insulated wire winding have a 180-degree phase difference.

[0016] Beneficial effects: the application adopts two magnetic conduction half rings, which are suitable for open-close installation, the two magnetic conduction half rings are connected by piezoelectric elements, the magnetic-piezoelectric-electric conversion is used to improve the efficiency of alternating current line power taking, and the mechanical vibration of the magnetic conduction element due to the magnetic pressure effect can be reduced based on the magnetostriction effect and the piezoelectric effect, thereby relieving the demagnetization of the magnetic conduction element caused by the mechanical vibration. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which form a part of this specification, are included to provide a further understanding of the application, illustrate preferred embodiments of the present application, and assist in explaining the application. In the drawings:

[0018] Figure 1 Structure diagram of the power taking device for open-close mounted AC line optimization according to the embodiments of the present application;

[0019] Figure 2 Alternating magnetic field diagram of the first and second magnetic conductive half-rings of the power taking device for open-close mounted AC line optimization according to the embodiments of the present application when the conductors passing through the half-rings have alternating current I;

[0020] Figure 3 Diagram of the gap between the first and second magnetic conductive half-rings of the power taking device for open-close mounted AC line optimization according to the embodiments of the present application, which produces elongation and shortening along the magnetic field direction alternately;

[0021] Figure 4 Voltage waveform diagram of the power taking device for open-close mounted AC line optimization according to the embodiments of the present application without rectification;

[0022] Figure 5 Waveform diagram of the output voltage of the piezoelectric element of the power taking device for open-close mounted AC line optimization according to the embodiments of the present application after D1 rectification;

[0023] Figure 6 Waveform diagram of the output voltage of the insulated wire winding of the power taking device for open-close mounted AC line optimization according to the embodiments of the present application after D2 rectification;

[0024] Figure 7 Waveform diagram of the power taking device for open-close mounted AC line optimization according to the embodiments of the present application after D1 and D2 rectification in the rectification circuit;

[0025] Figure 8 Direct current voltage obtained by the power taking device for open-close mounted AC line optimization according to the embodiments of the present application after filtering by C1 in the rectification circuit;

[0026] Figure 9 Circuit principle diagram of the insulated wire winding in full-wave rectification mode according to the embodiments of the present application;

[0027] Figure 10 Circuit principle diagram of the insulated wire winding and piezoelectric element of the power taking device for open-close mounted AC line optimization according to the embodiments of the present application working in rectification mode;

[0028] Figure 11 is Figure 9 the output voltage waveform diagram of the circuit in

[0029] Figure 12 is Figure 10 the output voltage waveform diagram of the circuit in DETAILED DESCRIPTION

[0030] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

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

[0032] Embodiment 1

[0033] Referring to Figure 1 : An alternating current line optimized power taking device for open-close installation, comprising a first magnetic conducting half ring 1 and a second magnetic conducting half ring 2, both ends of the first magnetic conducting half ring 1 and the second magnetic conducting half ring 2 are connected through piezoelectric elements 3, two piezoelectric elements 3 are connected in series through a wire and connected with a rectifier circuit 5; an insulated wire winding 4 is wound on the second magnetic conducting half ring 2, one end of the insulated wire winding 4 is short-circuited with the series-connected piezoelectric elements 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] The two magnetic conducting half rings in this embodiment are used for open-close installation, the two magnetic conducting half rings are connected through piezoelectric elements, the conversion of magnetic-piezoelectric-electricity is used to improve the efficiency of alternating current line power taking, and the magnetostriction effect and piezoelectric effect can reduce the mechanical vibration of the magnetic conducting element caused by the magnetostriction effect, thereby relieving the demagnetization of the magnetic conducting 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, the two piezoelectric elements 3 are used to convert the mechanical vibration generated by the first magnetic conducting half ring 1 and the second magnetic conducting half ring 2 into alternating voltage, and are connected in series to the D1 and the common ground end of the rectifier circuit 5.

[0037] In a specific example, one end of the insulated wire winding 4 is short-circuited with the series-connected piezoelectric elements 3 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] Embodiment 2

[0039] In order to achieve the above-mentioned purpose, the present embodiment also provides a power taking method of an alternating current line optimized power taking device for open-close installation, comprising the following steps:

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

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

[0042] S3: The first magnetic conductive half ring 1 and the second magnetic conductive half ring 2 generate longitudinal mechanical expansion and contraction under the alternating current flowing through the magnetic ring, and the piezoelectric elements 3 generate 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 elements 3 under the longitudinal mechanical expansion and contraction stress into 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 elements 3 under the 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 elements 3 or filling non-rigid material in the gap.

[0045] In a specific implementation, as shown in Figure 2 When the conductor passing through the first magnetic conductive half ring and the second magnetic conductive half ring has an alternating current I, according to Ampere's law, the alternating magnetic field generated by the conductor at a certain moment is as shown in B of Figure 2 Due to the alternating change of the current direction in the conductor, the direction of the magnetic field B also alternately changes.

[0046] Since the magnetic conductive material has higher magnetic conductivity than air medium, the alternating magnetic field intensity in the first magnetic conductive half ring and the second magnetic conductive half ring is also higher than that in the air. At the same time, according to the magnetostriction effect, the gap of the first magnetic conductive half ring and the second magnetic conductive half ring will generate elongation and shortening along the direction of the magnetic field, which alternately changes, such as the y-axis direction of Figure 3 If the first magnetic conductive half ring and the second magnetic conductive half ring are fixed at both ends by mechanical methods, and the two piezoelectric elements clamped between the first magnetic conductive half ring and the second magnetic conductive half ring generate alternating voltage under the alternating mechanical force.

[0047] According to Ampere's law, it can be known that the insulated wire winding terminals will generate alternating voltage under the action of the alternating magnetic field. Since the mechanical deformation of the first magnetic conductive half ring and the second magnetic conductive half ring along the direction of the magnetic field lags behind the change of the magnetic field, there is a phase difference between the alternating voltage generated by the piezoelectric elements and the alternating voltage generated by the insulated wire winding, and the phase difference can be adjusted by adjusting the gap between the magnetic conductive half ring and the piezoelectric elements or filling non-rigid material in the gap.

[0048] Suppose that by adjusting the gap between the first magnetic conductive half ring, the second magnetic conductive half ring and the piezoelectric element or filling the gap with non-rigid material, the piezoelectric element generates an alternating voltage U1 under the alternating mechanical force and the alternating voltage generated by the insulated wire winding has a 180-degree phase difference. Figure 4 for the voltage waveform without rectification, Figure 5 for the voltage waveform after the piezoelectric element output voltage is rectified by D1, Figure 6 for the voltage waveform after the insulated wire winding output voltage is rectified by D2, and after the rectification of D1 and D2 in the rectification circuit, it becomes as shown in Figure 7 After filtering by C1 in the rectification circuit, the obtained DC voltage is as shown in Figure 8

[0049] In a specific example, 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 to adjust so that the piezoelectric element 3 generates an alternating voltage U1 under the alternating mechanical force and the alternating voltage generated by the insulated wire winding 4 has a 180-degree phase difference.

[0050] When the piezoelectric element generates an alternating voltage U1 under the alternating mechanical force and the alternating voltage generated by the insulated wire winding has a 180-degree phase difference, at this time, the power taking efficiency of the AC line optimization power taking device for open-close installation is the highest.

[0051] The verification of the power taking method of the AC line optimization power taking device for open-close installation of the present embodiment is more superior to the power taking efficiency of the prior art as follows:

[0052] Suppose that by adjusting the gap between the number of turns of the insulated wire winding and the piezoelectric element, the amplitude of the output voltage of both is 20V. Due to the parasitic parameter influence between the insulated wire winding and the first magnetic conductive half ring, the second magnetic conductive half ring and the wire, the output waveform form of the insulated wire winding can be obtained by simulation. The rectified DC voltage value.

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

[0054] The waveforms obtained by simulation are as shown in Figure 11 and Figure 12 , wherein Figure 11 Uo is the output voltage of the insulated wire winding output alternating voltage Uc after rectification, and the value is about 8.70V. Figure 12 Uo is the voltage of the insulated wire winding and the piezoelectric element output voltage Uc and Up after rectification, and the value is about 18.95V. Among them, Figure 9 D1-D2 in and​Figure 10 D1-D4 are all IN1183, C1 is 680uF, and the load is 500 ohms.

[0055] It can be obtained that, Figure 9 The output power of the circuit is

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

[0057] Figure 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 influence of the parasitic parameters between the insulated wire windings, the magnetic conducting half ring and the wires, the output voltage of the insulated wire winding is seriously distorted, which restricts the energy taking efficiency. The energy taking method of the embodiment effectively improves the energy taking efficiency under the AC line.

[0060] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An AC line optimization energy harvesting device for open-type installation, characterized in that, It includes a first magnetic half-ring (1) and a second magnetic half-ring (2). The two ends of the first magnetic half-ring (1) and the second magnetic half-ring (2) are connected by piezoelectric elements (3). The two piezoelectric elements (3) are connected in series by wires and a rectifier circuit (5). An insulated wire winding (4) is wound on the second magnetic half-ring (2). One end of the insulated wire winding (4) is short-circuited to the piezoelectric element (3) connected in series and connected to the common ground terminal of the rectifier circuit (5). The other end is connected to the rectifier input terminal of the rectifier circuit (5).

2. The AC line optimization energy harvesting device for open-type installation according to claim 1, characterized in that, The rectifier circuit (5) consists of D1, D2 and C1, and the rectifier input terminal includes D1 and D2.

3. The AC line optimization energy harvesting device for open-type installation according to claim 2, characterized in that, Two piezoelectric elements (3) are used to convert the mechanical vibration generated by the first magnetic half-ring (1) and the second magnetic half-ring (2) into alternating voltage, and are connected in series to the D1 and ground terminal of the rectifier circuit (5).

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

5. A method for energy harvesting from an AC line optimization energy harvesting device with a retractable installation, characterized in that, Includes the following steps: S1: Composed of a first magnetic half-ring (1), a second magnetic half-ring (2), two piezoelectric elements (3), an insulated wire winding (4), and a rectifier circuit (5), forming an AC power supply topology; S2: The first magnetic half-ring (1) and the second magnetic half-ring (2) with magnetic permeability convert the alternating current flowing through the magnetic ring into the alternating voltage of the insulated wire winding (4); S3: The longitudinal mechanical expansion and contraction of the first magnetic half-ring (1) and the second magnetic half-ring (2) under the action of the alternating current flowing through the magnetic ring, 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 DC 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 stretching stress can be adjusted by adjusting the gap between the first magnetic half-ring (1), the second magnetic half-ring (2) and the piezoelectric element (3) or by filling the gap with non-rigid material.

6. The energy harvesting method for the AC line optimization energy harvesting device for open-type installation according to claim 5, characterized in that, Adjustments can be made by adjusting the gap between the first magnetic half-ring (1), the second magnetic half-ring (2) and the piezoelectric element (3) or by filling the gap with non-rigid material so that the alternating voltage U1 generated by the piezoelectric element (3) under the alternating mechanical force has a 180-degree phase difference with the alternating voltage generated by the insulated wire winding (4).

Images