An energy saving device based on magnetoelectric resonance phenomenon

Abstract

The application discloses an energy-saving device based on magnetoelectric resonance, which comprises an electric energy optimization controller, a mutual inductor arranged on a three-phase circuit, and electric wires L1, L2, L3 and N connected in parallel with the existing three-phase circuit; a magnetoelectric resonance energy-saving circuit is connected in parallel between the electric wires L1, L2, L3 and N; the mutual inductor is electrically connected with the electric energy optimization controller, wherein the electric energy optimization controller controls the magnetoelectric resonance energy-saving circuit according to the electric signal received by the mutual inductor. The application balances the current on the spot, changes the voltage quality at the end of the line, improves the power factor, has the advantages of small investment, good effect, small size, simple installation, maintenance-free, stable performance and the like, effectively improves the stability and reliability of equipment operation, reduces equipment failure and accidents, prolongs the service life of the equipment, and has very significant effects on energy saving and energy loss reduction.

Description

Technical Field

[0001] This invention relates to the field of power grid energy-saving technology, specifically to an energy-saving device based on the phenomenon of magnetoelectric resonance. Background Technology

[0002] In recent years, China has actively pursued energy conservation and emission reduction, continuously pushing itself to take more concrete and effective actions to address climate change. Achieving carbon peaking and carbon neutrality is a broad and profound systemic transformation of the economy and society. Carbon peaking and carbon neutrality must be incorporated into the overall framework of ecological civilization construction, and we must demonstrate unwavering determination to achieve the goal of carbon neutrality. Therefore, we propose an energy-saving device based on the phenomenon of magnetoelectric resonance. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0004] This invention discloses an energy-saving device based on the phenomenon of magnetoelectric resonance, comprising an energy optimization controller, a current transformer installed on a three-phase circuit, and wires L1, L2, L3, and N connected in parallel with the existing three-phase circuit; a magnetoelectric resonance energy-saving circuit is connected in parallel between the wires L1, L2, L3, and N; the current transformer is electrically connected to the energy optimization controller, wherein the energy optimization controller controls the operation of the magnetoelectric resonance energy-saving circuit according to the electrical signal received from the current transformer;

[0005] The magnetoelectric resonance energy-saving circuit includes a first LRC circuit connected in parallel between wires L1 and L2; a second LRC circuit connected in parallel between wires L2 and L3; and a second LRC circuit connected in parallel between wires L1 and L3.

[0006] As a preferred embodiment of the present invention, the first LRC circuit includes a variable inductor. Variable capacitor Fixed capacitor C 1 resistance R 1 Fixed inductor L 1 ;

[0007] The variable inductor and variable capacitor The circuit is connected in parallel to form a first parallel circuit. One end of the first parallel circuit is electrically connected to wire L1, and the other end of the first parallel circuit is also electrically connected to wire L1. The fixed capacitor C 1 The resistor R is arranged in parallel between wires L1 and L2. 1 With fixed inductor L 1 The resistor R is connected in series to form a series circuit. 1 Not with fixed inductor L 1 One end of the connection is electrically connected to wire L1, and the inductor L is fixed. 1 Not with resistor R1 One end of the connection is electrically connected to wire L2.

[0008] As a preferred embodiment of the present invention, the second LRC circuit includes a variable inductor. Variable capacitor Fixed capacitor C 2 resistance R 2 Fixed inductor L 2 ;

[0009] The variable inductor and variable capacitor A second parallel circuit is formed, with one end of the second parallel circuit electrically connected to wire L2 and the other end of the second parallel circuit electrically connected to wire L3; the fixed capacitor C 2 The resistor R is arranged in parallel between wires L2 and L3; 2 With fixed inductor L 2 The resistor R is connected in series to form a series circuit. 2 Not with fixed inductor L 2 One end of the connection is electrically connected to wire L3, and the inductor L is fixed. 2 Not with resistor R 2 One end of the connection is electrically connected to wire L2.

[0010] As a preferred embodiment of the present invention, the third LRC circuit includes a variable inductor. Variable capacitor Fixed capacitor C 3 resistance R 3 Fixed inductor L 3 ;

[0011] The variable inductor and variable capacitor A parallel circuit is formed, with one end of the parallel circuit electrically connected to wire L1 and the other end of the parallel circuit electrically connected to wire L3; the fixed capacitor C 3 The resistor R is arranged in parallel between wires L1 and L3. 3 With fixed inductor L 3 The resistor R is connected in series to form a series circuit. 3 Not with fixed inductor L 3 One end of the connection is electrically connected to wire L1, and the inductor L is fixed. 3 Not with resistor R 3 One end of the connector is electrically connected to wire L3.

[0012] As a preferred technical solution of the present invention, the variable inductor Variable capacitor Variable Inductance Variable capacitor Variable Inductance and variable capacitor All are electrically connected to the power optimization controller.

[0013] As a preferred embodiment of the present invention, the energy-saving method of the energy-saving device based on the magnetoelectric resonance phenomenon is that the power optimization controller controls the variable inductor according to the electrical signal received from the current transformer. Variable capacitor Variable Inductance Variable capacitor Variable Inductance and variable capacitor The parameters are adjusted so that each circuit achieves a current resonance state, thereby achieving energy saving.

[0014] The beneficial effects of this invention are:

[0015] This energy-saving device, based on the phenomenon of magnetoelectric resonance, does not generate high harmonics, does not pollute the power grid, and provides excellent protection for the power grid. It is a highly effective and environmentally friendly energy-saving product. It can connect devices with capacitive power loads and inductive power loads in parallel in a circuit. When the capacitive load releases energy, the inductive load absorbs energy; when the inductive load releases energy, the capacitive load absorbs energy. Energy is exchanged between the two types of loads. In this way, the power absorbed by the inductive load can be compensated by the power output of the capacitive load. This is the principle of power compensation, which can effectively save 10%-20% of electricity and 10%-30% of electricity costs. The installation location should be as close as possible to your electrical equipment; the closer, the better. It balances the current locally, changes the voltage quality at the end of the line, and improves the power factor. It has advantages such as low investment, good effect, small size, simple installation, maintenance-free, and stable performance. It effectively improves the stability and reliability of equipment operation, reduces equipment failures and accidents, and extends equipment life. It has a very significant effect on energy saving and reducing energy loss. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a circuit diagram of an energy-saving device based on the magnetoelectric resonance phenomenon according to the present invention;

[0018] Figure 2 This is a schematic diagram of the general structure of the magnetoelectric resonance energy-saving circuit of an energy-saving device based on the magnetoelectric resonance phenomenon according to the present invention.

[0019] Figure 3 This is an equivalent circuit diagram of the magnetoelectric resonance energy-saving circuit of an energy-saving device based on the magnetoelectric resonance phenomenon of the present invention.

[0020] Figure 4 It is the equivalent LRC parallel loop circuit of the first LRC circuit, the second LRC circuit, and the third LRC circuit;

[0021] Figure 5 It is the impedance-frequency characteristic curve of a parallel resonant circuit;

[0022] Figure 6 This is the reactance frequency response diagram of a parallel circuit;

[0023] Figure 7 It is a graph of the resonance characteristic;

[0024] Figure 8 It is the inherent frequency curve when the circuit capacitance and inductance are very small;

[0025] Figure 9 It is a state diagram in a loop resonance.

[0026] In the diagram: 1. Current transformer; 2. Power optimization controller; 3. Magnetoelectric resonance energy-saving circuit. Detailed Implementation

[0027] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0028] Example: Figure 1-9 As shown, the present invention discloses an energy-saving device based on the phenomenon of magnetoelectric resonance, comprising an energy optimization controller 2, a current transformer 1 installed on a three-phase circuit, and wires L1, L2, L3 and N connected in parallel with the existing three-phase circuit; a magnetoelectric resonance energy-saving circuit 3 is connected in parallel between the wires L1, L2, L3 and N; the current transformer 1 is electrically connected to the energy optimization controller 2, wherein the energy optimization controller 2 controls the operation of the magnetoelectric resonance energy-saving circuit 3 according to the electrical signal received from the current transformer 1;

[0029] The magnetoelectric resonance energy-saving circuit includes a first LRC circuit connected in parallel between wires L1 and L2; a second LRC circuit connected in parallel between wires L2 and L3; and a second LRC circuit connected in parallel between wires L1 and L3.

[0030] like Figure 2 and Figure 3 The first LRC circuit includes a variable inductor. Variable capacitor Fixed capacitor C 1 resistance R 1 Fixed inductor L 1 ;

[0031] The variable inductor and variable capacitor The circuit is connected in parallel to form a first parallel circuit. One end of the first parallel circuit is electrically connected to wire L1, and the other end of the first parallel circuit is also electrically connected to wire L1. The fixed capacitor C 1 The resistor R is arranged in parallel between wires L1 and L2. 1 With fixed inductor L 1 The resistor R is connected in series to form a series circuit. 1 Not with fixed inductor L 1 One end of the connection is electrically connected to wire L1, and the inductor L is fixed. 1 Not with resistor R 1 One end of the connection is electrically connected to wire L2.

[0032] 4. The second LRC circuit includes a variable inductor. Variable capacitor Fixed capacitor C 2 resistance R 2 Fixed inductor L 2 ;

[0033] The variable inductor and variable capacitor A second parallel circuit is formed, with one end of the second parallel circuit electrically connected to wire L2 and the other end of the second parallel circuit electrically connected to wire L3; the fixed capacitor C 2 The resistor R is arranged in parallel between wires L2 and L3; 2 With fixed inductor L 2 The resistor R is connected in series to form a series circuit. 2 Not with fixed inductor L 2 One end of the connection is electrically connected to wire L3, and the inductor L is fixed. 2 Not with resistor R 2 One end of the connection is electrically connected to wire L2.

[0034] The third LRC circuit includes a variable inductor. Variable capacitor Fixed capacitor C 3 resistance R 3 Fixed inductor L 3 .

[0035] The variable inductor and variable capacitor A parallel circuit is formed, with one end of the parallel circuit electrically connected to wire L2 and the other end of the parallel circuit electrically connected to wire L3; the fixed capacitor C 3 The resistor R is arranged in parallel between wires L1 and L3. 3 With fixed inductor L 3The resistor R is connected in series to form a series circuit. 3 Not with fixed inductor L 3 One end of the connection is electrically connected to wire L1, and the inductor L is fixed. 3 Not with resistor R 3 One end of the connector is electrically connected to wire L3.

[0036] The variable inductor Variable capacitor Variable Inductance Variable capacitor Variable Inductance and variable capacitor All are electrically connected to the power optimization controller.

[0037] The energy-saving method of the energy-saving device based on the magnetoelectric resonance phenomenon is that the power optimization controller controls the variable inductor according to the electrical signal received from the current transformer. Variable capacitor Variable Inductance Variable capacitor Variable Inductance and variable capacitor The parameters are adjusted so that each circuit achieves a current resonance state, thereby achieving energy saving.

[0038] The first LRC circuit, the second LRC circuit, and the third LRC circuit can be equivalent to the following in the magnetoelectric resonance energy-saving circuit: Figure 4 The LRC parallel loop circuit shown, wherein the impedance in the equivalent LRC parallel loop circuit,

[0039]

[0040] Where L0 is the load inductance, C is the variable capacitor, L is the variable inductance, and the output voltage obtained across the circuit is... , where r is the resistance.

[0041] Assuming that, then we have:

[0042]

[0043] Then the admittance of the loop:

[0044]

[0045] in:

[0046] Where L e The parallel equivalent result of L and L0 is given by L0. e The smaller the value, the better, and it can be rewritten as L, that is, L can be understood as the equivalent inductance of the system;

[0047] When the circuit resonates, ω = ω0, that is, ω0 is the resonant frequency, and at this time we have:

[0048]

[0049]

[0050]

[0051]

[0052]

[0053] On the other hand, due to:

[0054]

[0055]

[0056] When impedance reaches its maximum value, admittance will reach its minimum value, and current will find it most difficult to pass through.

[0057]

[0058] At this point, the system's equivalent resistance reaches its maximum value:

[0059]

[0060] Or, resonance can achieve the minimum conductivity value:

[0061]

[0062] The impedance characteristics of the circuit are as follows:

[0063]

[0064] in:

[0065]

[0066] or:

[0067]

[0068] make:

[0069]

[0070] When the circuit is in resonance:

[0071] ξ=0

[0072] but:

[0073]

[0074] Impedance amplitude-frequency characteristics:

[0075]

[0076] Impedance phase frequency characteristics:

[0077]

[0078] Voltage across the circuit:

[0079]

[0080] or

[0081]

[0082] like Figure 5 As shown, due to Z P The circuit achieves its maximum value at ω0 and its minimum value at ω0. This means that the circuit operates with the minimum current under a constant voltage, thereby greatly reducing the external current supply. The external current decreases rapidly and significantly, saving external energy. By adjusting C0 or L0, the circuit reaches a resonant state, which greatly reduces the current outside the circuit, thereby greatly reducing the energy loss of the line and achieving energy saving.

[0083] Resonant voltage across the circuit

[0084]

[0085] When the circuit is in resonance (ω=ω0) The circuit impedance is at its maximum and is purely resistive R. e0 ;

[0086] When the circuit is detuned (ω≠ω0), the impedance of the parallel circuit decreases, the current increases, energy is not saved, the phase shift value increases, that is, the power factor decreases.

[0087] When ω < ω0 The impedance of the parallel circuit is inductive.

[0088] When ω>ω0 The impedance of the parallel circuit is capacitive;

[0089] If we ignore the loss resistance (r) of a simple parallel resonant circuit, we can then plot the reactance-frequency characteristic curve of the parallel circuit as follows: Figure 6 As shown.

[0090] The resonant resistance R of the parallel circuit with current characteristics at resonance e0 For ω0L or The current in each branch of a parallel circuit is inversely proportional to its impedance. Therefore, the current in the inductor and capacitor is Q0 times the external current, i.e.:

[0091] I L =I C =Q0I S

[0092] and: and The phases are opposite. Therefore, the external current required to maintain the circuit is 1 / Q0 of the current required by the motor, and the heat dissipation power of the external circuit is RI. S 2 R is the total resistance of the external circuit. If a circuit is not formed using capacitor C, assuming the load achieves equal current flow, the external current will be approximately I. L The heating power at this time is RI L 2 The ratio of the two is

[0093]

[0094] In other words, the heat generated now is only the same as before. If Q0 = 3, then the heat generation is reduced to 1 / 9. By adjusting C0 or L0, the circuit can reach a resonant state, and the current outside the circuit is greatly reduced.

[0095] Voltage characteristics: The voltage across the circuit is maximum at resonance. It is in phase with the excitation current, and the power factor is equal to 1.0. Before adding C, assume the power supply voltage is V. y The original circuit should have included:

[0096] V y =I y ·R+I y ·jωL

[0097]

[0098] The voltage across the load is:

[0099] V yL =V y -I y ·R

[0100] After adding C:

[0101] V y =I s ·R+I L ·jωL=I S ·R+Q0I S ·jωL=I S (R+Q0·jωL)

[0102]

[0103] When R is very small, meaning the line is very good, then:

[0104] I y =Q0I S

[0105] At resonance, the voltage across the load is:

[0106]

[0107] This also shows that by optimizing the circuit, a larger voltage can be applied across the load, thereby increasing the load's operating capacity, since power is proportional to the square of the voltage.

[0108] The slope of the phase frequency response curve

[0109]

[0110] The phase frequency characteristic of a parallel resonant circuit has a negative slope, and the higher the Q0, the greater the slope and the steeper the curve.

[0111] Linear phase frequency range when At this time, the phase frequency characteristic can be approximated as:

[0112]

[0113] at this time The frequency range in which a linear relationship exists between Q0 and ω, and where the phase frequency response exhibits a linear relationship, is inversely proportional to Q0. For example... Figure 7 As shown.

[0114] Clearly, the curve shape is related to Q0. As shown in the graph, the larger Q0 is, the sharper the curve and the better the selectivity.

[0115] When the frequency of the power falls within the (ω1, ω2) region, the circuit is in a good energy-saving state. Adjusting C0 or L0 so that the frequency of the mains power 50 Hz falls within this region can achieve the purpose of energy saving. Moreover, the closer ω0 is to 100π, the better the energy-saving effect.

[0116] By employing the principle of magnetoelectric resonance, the power factor is effectively altered, and transient surges in the power grid circuit are filtered. The circuit has overvoltage, undervoltage, overcurrent, and short-time protection functions to ensure that the equipment is not affected or damaged by transient surges, thereby improving power efficiency, delaying the aging of electrical equipment, and minimizing the power consumption of the civil power system.

[0117] Parameter adjustment based on magnetoelectric resonance energy saving

[0118] From the above, we know that the resonant frequency of the circuit is:

[0119]

[0120] or

[0121]

[0122] Since loads such as motors are mostly inductive loads, L will not be zero. Therefore:

[0123]

[0124] It will not be zero.

[0125] However, since C=0, or it has inherent capacitive characteristics but with a small parameter, the natural frequency is... It is very large, and the impedance characteristic curve is approximately as follows: Figure 8 When the capacitance and inductance of the circuit are very small, the natural frequency is relatively high, and the circuit exhibits inductive characteristics.

[0126] When the value of C is increased, the natural frequency will decrease significantly, which is represented in the graph as moving closer to 50Hz (100π). Alternatively, it can be understood as the left vertical line moving to the right, closer to ω0. It can be seen that if the distance between the two is large, the initial movement of the position will result in a very slow increase in the value on the vertical axis. The following graph illustrates the phase angle hysteresis; the movement process can be understood as a correction of the phase difference. It can be seen that the phase difference correction effect changes slowly at the beginning, but becomes significant when a certain position is reached.

[0127] As the value of C is continuously increased, the left line will reach the position of the right line. At this point, the circuit resonates at the power frequency, the circuit impedance reaches its maximum, the external current flow is minimal, and the internal current circulates itself and reaches its maximum. At this time, from... Figure 9 As can be seen, the external current and voltage are in phase at resonance. The powerful internal current can drive the load. Figure 9 As shown in the diagram. Calculations show that the heat generated on the line will be greatly reduced, so energy saving is certain. However, if resonance is not achieved, the effect will not be as good. In this case, the role of the power optimizer will mainly be to improve the power factor.

[0128] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An energy-saving device based on the phenomenon of magnetoelectric resonance, characterized in that: Includes an energy optimization controller (2), a transformer (1) installed on a three-phase circuit, and wires L1, L2, L3 and N connected in parallel with the existing three-phase circuit; a magnetoelectric resonance energy-saving circuit (3) is connected in parallel between the wires L1, L2, L3 and N; the transformer (1) is electrically connected to the energy optimization controller (2), wherein the energy optimization controller (2) controls the operation of the magnetoelectric resonance energy-saving circuit (3) according to the electrical signal received from the transformer (1); The equivalent circuit of the magnetoelectric resonance energy-saving circuit includes a first LRC circuit connected in parallel between wires L1 and L2, a second LRC circuit connected in parallel between L2 and L3, and a third LRC circuit connected in parallel between L1 and L3. The first LRC circuit includes a variable inductor. Variable capacitor Fixed capacitor ,resistance Fixed inductor The variable inductor and variable capacitor The circuit is connected in parallel to form a first parallel circuit. One end of the first parallel circuit is electrically connected to wire L1, and the other end of the first parallel circuit is electrically connected to wire L2; the fixed capacitor The resistors are arranged in parallel between wires L1 and L2; With fixed inductor The resistors are connected in series to form a series circuit. Not with fixed inductor One end of the connector is electrically connected to wire L1 to fix the inductor. Not with resistor One end of the connector is electrically connected to wire L2; The second LRC circuit includes a variable inductor. Variable capacitor Fixed capacitor ,resistance Fixed inductor The variable inductor and variable capacitor A second parallel circuit is formed by connecting the two circuits in parallel. One end of the second parallel circuit is electrically connected to wire L2, and the other end of the second parallel circuit is electrically connected to wire L3; the fixed capacitor... The resistors are arranged in parallel between wires L2 and L3; With fixed inductor The resistors are connected in series to form a series circuit. Not with fixed inductor One end of the connector is electrically connected to wire L3 to fix the inductor. Not with resistor One end of the connector is electrically connected to wire L2; The third LRC circuit includes a variable inductor. Variable capacitor Fixed capacitor ,resistance Fixed inductor The variable inductor and variable capacitor A parallel circuit is formed, with one end of the parallel circuit electrically connected to wire L1 and the other end of the parallel circuit electrically connected to wire L3; the fixed capacitor The resistors are connected in parallel between wires L1 and L3; With fixed inductor The resistors are connected in series to form a series circuit. Not with fixed inductor One end of the connector is electrically connected to wire L1 to fix the inductor. Not with resistor One end of the connector is electrically connected to wire L3.

2. The energy-saving device based on magnetoelectric resonance phenomenon according to claim 1, characterized in that, The variable inductor Variable capacitor Variable inductor Variable capacitor Variable inductor and variable capacitor All are electrically connected to the power optimization controller.

3. The energy-saving device based on magnetoelectric resonance phenomenon according to claim 2, characterized in that, The energy-saving method of the energy-saving device based on the magnetoelectric resonance phenomenon is that the power optimization controller controls the variable inductor according to the electrical signal received from the current transformer. Variable capacitor Variable inductor Variable capacitor Variable inductor and variable capacitor The parameters are adjusted so that each circuit achieves a current resonance state, thereby achieving energy saving.

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