Multi-level photonic inverter based on liquid crystal module and inverting method thereof

Abstract

The application discloses a multi-level photon inverter based on a liquid crystal module and an inverting method. The inverter controls the light flux between the LED and the PV by adjusting the liquid crystal module to change the permeability of the inverter, so as to realize the inverting output of the PV. The inverting method does not have a switching device on the main circuit. Compared with the traditional switching power supply, the multi-level photon inverter based on the liquid crystal module and the inverting method have the advantages of simple design, wide application field, excellent electrical isolation performance, small electromagnetic interference, low output ripple and low element power consumption. The application innovates an alternating current multi-level photon power converter to complete the conversion of direct current into alternating current, which not only widens the input and output modes and the application range of the photon power converter, but also introduces a multi-level generation technology which is fused with the liquid crystal electro-optic characteristics.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electric energy conversion, in particular to a multi-level photonic inverter based on a liquid crystal module and an inverting method thereof. BACKGROUND

[0002] Traditional switching converters have problems such as large volume, large output ripple and electromagnetic interference, and are difficult to apply to occasions requiring high-quality output; photonic transformers have high-quality electric energy output, but can only realize DC-DC electric energy conversion, cannot realize direct current input and alternating current output, the form of input and output is single, so that they can only be applied to direct current occasions of voltage increase or voltage decrease, and it is difficult to meet the working requirements of alternating current output, and the scope of application is limited.

[0003] The present application discloses a multi-level photonic inverter based on a liquid crystal module and an inverting method thereof. In view of the problems of difficulty in DC-AC conversion, high control requirements and the like of the existing photonic electric energy converter, in combination with the photoelectric characteristics and electrical output characteristics of the photoelectric material, the photoelectric characteristics of the liquid crystal material, a photonic electric energy converter capable of realizing direct current input and alternating current output is proposed, and the alternating current form is multi-level, and a plurality of levels are obtained by changing the transmittance of the liquid crystal module. Thus, a method for generating multi-level is provided, the input and output forms of the photonic electric energy converter and the application field thereof are expanded, and the photonic electric energy converter has the advantages of small volume, low electromagnetic interference, low output ripple and the like.

[0004] With the continuous optimization and development of light-emitting diode (LED) devices and photovoltaic thermal (PET) theory, photonic converters convert and transfer energy through LEDs and photovoltaic elements (PV), output high-quality electric energy, suppress the distortion rate of harmonics, and can be applied to medical devices, modern communication technologies and other occasions requiring high isolation power conversion. The photonic electric energy converter solves the problems of traditional switching converters such as large volume, large output ripple and electromagnetic interference, and in the world of energy shortage, the photonic electric energy converter will become a new type of energy conversion technology with potential application in various fields.

[0005] The present application discloses a multi-level photonic inverter based on a liquid crystal module and an inverting method thereof, which is aimed at the problems of low output voltage level, output voltage distortion and electromagnetic interference of traditional inverters, and combines the photoelectric characteristics of the photoelectric material, the photoelectric characteristics of the liquid crystal module and the electrical output characteristics. SUMMARY

[0006] The present application discloses a multi-level photonic inverter based on a liquid crystal module and an inverting method thereof, which is aimed at the problems of low output voltage level, output voltage distortion and electromagnetic interference of traditional inverters, and combines the photoelectric characteristics of the photoelectric material, the photoelectric characteristics of the liquid crystal module and the electrical output characteristics. ​The voltage changes, the light flux through the liquid crystal module is changed, so that the light intensity of the photovoltaic element PV is changed. It is applied to the occasion of direct current-alternating current conversion. The multi-level photon inverter based on the liquid crystal module and the inverting method thereof combine the characteristics of the photoelectric material and the electrical output characteristic, the photoelectric characteristic of the liquid crystal material, realize the photon electric energy converter DC-AC electric energy conversion; when the control voltage of the TN liquid crystal material is in the range of , the transmittance changes linearly with the voltage change curve; energy conversion and coupling are carried out, which has the advantages of small volume, low electromagnetic interference, low output ripple and the like, so as to solve the problems of large volume, large output ripple and electromagnetic interference of the traditional switching converter, expand the input and output forms of the photon electric energy converter and its application field, and simultaneously provide a new method for generating multi-level. Unlike the traditional switching inverter, a multi-level photon electric energy converter converts and transmits energy through photons, has the advantages of simple structure, low electromagnetic interference, low output ripple and low component power consumption, aims to solve the problems of complex structure, low output level number and being able to realize multi-level only by increasing the switching tube of the traditional inverter, and expand the application field of the photon electric energy converter;

[0007] The circuit unit comprises a direct current power supply DC, a first LED 1, a second LED 2, a first liquid crystal module 1, a second liquid crystal module 2, a control voltage source 1, a control voltage source 2, a photovoltaic element PV1 and a photovoltaic element PV2.

[0008] The main circuit unit comprises a direct current power supply DC, a first LED 1, a second LED 2, a photovoltaic element PV1 and a photovoltaic element PV2.

[0009] The auxiliary control unit comprises a first liquid crystal module 1, a second liquid crystal module 2, a control voltage source 1 and a control voltage source 2.

[0010] The specific inverting method of the multi-level photon inverter based on the liquid crystal module and the inverting method thereof is as follows:

[0011] S1: the direct current power supply DC supplies power to the first LED and the second LED, the voltage of the control voltage source 1 and the control voltage source 2 is , the first liquid crystal module 1 and the second liquid crystal module 2 are in the light blocking state, the output of the photovoltaic element PV1 and the photovoltaic element PV2 is 0V, and the output voltage is 0V.

[0012] S2: the direct current power supply DC supplies power to the first LED and the second LED, the voltage of the control voltage source 1 is , the output voltage of the control voltage source 2 is , and the output voltage is

[0013] ​​​ ,

[0014] The second liquid crystal module 2 is in a light-transmitting state, with a transmittance of , the first liquid crystal module 1 is in a light-blocking state, and the transmittance , the output voltage of photovoltaic element PV2 is , the photovoltaic element PV1 output is 0V, the output voltage is

[0015] ;

[0016] S3: The DC power supply DC supplies power to the first LED 1 and the second LED 2, and the voltage of the control voltage source 1 and the control voltage source 2 are Both , the first liquid crystal module 1 and the second liquid crystal module 2 are both in the light blocking state, the outputs of the photovoltaic elements PV1 and PV2 are both 0V, and the output voltage is 0V;

[0017] S4: The DC power supply DC supplies power to the first LED 1 and the second LED 2, and the modulation voltage of the control voltage source 2 The output voltage is , the output voltage of the control voltage source 1 is for:

[0018] ,

[0019] The second liquid crystal module 1 is in a light-transmitting state, and the transmittance , the first liquid crystal module 2 is in a light-blocking state, and the transmittance , the output voltage of photovoltaic element PV1 is , the photovoltaic element PV2 output is 0V, the output voltage is

[0020] ;

[0021] S5: The DC power supply DC supplies power to the first LED 1 and the second LED 2, and the voltages of the control voltage sources 1 and 2 are controlled. Both , the first liquid crystal module 1 and the second liquid crystal module 2 are both in the light blocking state, the outputs of the photovoltaic elements PV1 and PV2 are both 0V, and the output voltage is 0V;

[0022] The photon energy emitted by the first LED1 and the second LED2 is a fixed value , the alternative operation of the first liquid crystal module 1 and the second liquid crystal module 2 changes the transmittance of itself, the photovoltaic element PV1 and the photovoltaic element PV2 alternately receive the changed photon energy, so that the output voltage produces a sinusoidal change.

[0023] From the above technical method, the case embodiment of the application has the following beneficial effects:

[0024] The application discloses a multi-level photonic inverter based on a liquid crystal module and an inverting method thereof, and proposes a corresponding control strategy, transmittance of a light flux transmission space is changed by controlling voltage at both ends of the liquid crystal module, so that the received light flux of the output side PV is changed, and the application is applied to a direct current-alternating current conversion occasion. N The multi-level photonic inverter based on the liquid crystal module and the inverting method thereof combine characteristics of photoelectric materials, electro-optical characteristics and electrical output characteristics of TN liquid crystal materials, realize DC-AC electric energy conversion theory of the photonic electric energy converter by using the liquid crystal module N The level output is greater than 1, and the application field of the photonic electric energy converter is expanded. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings in the embodiments will be briefly introduced below, and the technical solutions in the embodiments of the application will be clearly and completely described in combination with the drawings of the application. Obviously, the described embodiments are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor on the premise of the drawings.

[0026] Figure 1 It is a topological structure diagram of the multi-level photonic inverter based on the liquid crystal module and the inverting method thereof of the application.

[0027] Figure 2 It is a working principle diagram of the multi-level photonic inverter based on the liquid crystal module and the inverting method thereof in the embodiments of the application.

[0028] Figure 3 It is a transmittance change curve diagram of the TN liquid crystal module of the multi-level photonic inverter based on the liquid crystal module and the inverting method thereof in the embodiments of the application under different voltages.

[0029] Figure 4 It is an inverting flowchart and input and output waveform diagram of the multi-level photonic inverter based on the liquid crystal module and the inverting method thereof in the embodiments of the application. DETAILED DESCRIPTION

[0030] In order to clearly illustrate the objectives, technical solutions and characteristics of the embodiments of the present application, the technical solutions of the embodiments of the present application will be described further and clearly below with reference to the drawings of prior art and the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor should belong to the protection scope of the present application.

[0031] Please refer to Figure 1 , Figure 1 The topological structure diagram of the liquid crystal module-based multi-level photonic inverter and the inverting method thereof of the present application comprises a main circuit unit and a main control unit.

[0032] The main circuit unit comprises a direct current power supply DC, a first LED 1, a second LED 2, a photovoltaic element PV1 and a photovoltaic element PV2, and the specific connection mode is as follows:

[0033] The positive pole of the direct current power supply DC is connected with the positive poles of the first LED 1 and the second LED 2.

[0034] The negative pole of the direct current power supply DC is connected with the negative poles of the first LED 1 and the second LED 2.

[0035] The first LED 1 and the second LED 2 are connected in parallel.

[0036] The photovoltaic elements PV1 and PV2 are both connected in series by n PV elements.

[0037] The photovoltaic element PV1 comprises a photovoltaic element PV 11 , a photovoltaic element PV 12 , a photovoltaic element PV 1n , and so on.

[0038] The photovoltaic element PV2 comprises a photovoltaic element PV 21 , a photovoltaic element PV 22 , a photovoltaic element PV 2n , and so on.

[0039] The positive pole of the photovoltaic element PV 11 is connected with the negative pole of the photovoltaic element PV 21 .

[0040] The negative pole of the photovoltaic element PV 11 is connected with the positive pole of the photovoltaic element PV 12 , the negative pole of the photovoltaic element PV 12 is connected with the positive pole of the photovoltaic element PV 13 , and so on.1(n-1) The negative electrode and the photovoltaic element PV 1n The positive connection of

[0041] The photovoltaic element PV 1n The negative electrode and the photovoltaic element PV 2n The positive connection of

[0042] The photovoltaic element PV 21 The positive electrode and the photovoltaic element PV 22 The negative pole of the photovoltaic element PV 22 The positive electrode and the photovoltaic element PV 23 The negative pole of the photovoltaic element PV is connected, ..., 2(n-1) The positive electrode and the photovoltaic element PV 2n Negative connection;

[0043] The auxiliary control unit includes: a first liquid crystal module 1, a second liquid crystal module 2, a control voltage source 1, and a control voltage source 2;

[0044] The first end of the control voltage source 1 is connected to the positive electrode of the first liquid crystal module 1 , and the second end of the control voltage source 1 is connected to the negative electrode of the first liquid crystal module 1 ;

[0045] A first end of the control voltage source 2 is connected to the positive electrode of the second liquid crystal module 2 , and a second end of the control voltage source 2 is connected to the negative electrode of the second liquid crystal module 2 .

[0046] Preferably, the liquid crystal module is a TN type liquid crystal module;

[0047] Preferably, the first LED1 and the second LED2 are 845nm infrared LEDs;

[0048] Please refer to Figure 1 , Figure 1 The schematic diagram of the working principle of the multi-level photon inverter based on liquid crystal module and its inversion method of the present invention is combined with Figure 3 TN liquid crystal electro-optical characteristic curve, Figure 4 The flow chart and working waveform analysis of the DC-AC photon power converter described in this article, the specific inversion method is:

[0049] S1: Figure 2 (a) The DC power supply DC supplies power to the first LED 1 and the second LED 2, and the voltage of the control voltage source 1 and the control voltage source 2 is Both , the first liquid crystal module 1 and the second liquid crystal module 2 are both in the light blocking state, the outputs of the photovoltaic elements PV1 and PV2 are both 0V, and the output voltage is 0V;

[0050] S2: Figure 2 (b) the direct current power supply DC powers the first LED 1 and the second LED 2, the voltage of the control voltage source 1 is , , and the voltage of the control voltage source 2 is :

[0051] ,

[0052] The second liquid crystal module 2 is in a light transmission state, the transmittance is , the first liquid crystal module 1 is in a light blocking state, the transmittance is , the output voltage of the photovoltaic element PV2 is , the output of the photovoltaic element PV1 is 0V, and the output voltage is

[0053] ;

[0054] S3: Figure 2 (a) the direct current power supply DC powers the first LED 1 and the second LED 2, the voltage of the control voltage source 1 and the control voltage source 2 is , , the first liquid crystal module 1 and the second liquid crystal module 2 are both in a light blocking state, the output of the photovoltaic element PV1 and the photovoltaic element PV2 is both 0V, and the output voltage is 0V;

[0055] S4: Figure 2 (c) the direct current power supply DC powers the first LED 1 and the second LED 2, the voltage of the control voltage source 2 is , the voltage of the control voltage source 1 is :

[0056] ,

[0057] The second liquid crystal module 1 is in a light transmission state, the transmittance is , the first liquid crystal module 2 is in a light blocking state, the transmittance is , the output voltage of the photovoltaic element PV1 is , the output of the photovoltaic element PV2 is 0V, and the output voltage is

[0058] ;

[0059] S5: Figure 2 (a) the direct current power supply DC powers the first LED 1 and the second LED 2, the voltage of the control voltage source 1 and the control voltage source 2 is , , the first liquid crystal module 1, the second liquid crystal module 2 are both in the light blocking state, the photovoltaic element PV1, the photovoltaic element PV2 output are both 0V, the output voltage is 0V.

Claims

1. The multi-level photon inverter topology based on liquid crystal modules is characterized by: include: Main circuit unit and main control unit; The circuit unit includes: a direct current power supply DC, a first LED 1, a second LED 2, a first liquid crystal module 1, a second liquid crystal module 2, a control voltage source 1, a control voltage source 2, a photovoltaic element PV1, and a photovoltaic element PV2; The positive electrode of the direct current power supply DC is connected to the positive electrodes of the first LED 1 and the second LED 2; The negative electrode of the direct current power supply DC is connected to the negative electrodes of the first LED 1 and the second LED 2; The first LED1 and the second LED2 are connected in parallel; The photovoltaic elements PV1 and PV2 are each composed of n PV elements connected in series; The photovoltaic element PV1 includes: a photovoltaic element PV 11 、Photovoltaic elements PV 12 、...、Photovoltaic components PV 1n ; The photovoltaic element PV2 includes: a photovoltaic element PV 21 、Photovoltaic elements PV 22 、...、Photovoltaic components PV 2n ; The photovoltaic element PV 11 The positive electrode and the photovoltaic element PV 21 Negative connection; The photovoltaic element PV 11 The negative electrode and the photovoltaic element PV 12 The positive connection of the photovoltaic element PV 12 The negative electrode and the photovoltaic element PV 13 The positive connection of the photovoltaic element PV 1(n-1) The negative electrode and the photovoltaic element PV 1n The positive connection of The photovoltaic element PV 1n The negative electrode and the photovoltaic element PV 2n The positive connection of The photovoltaic element PV 21 The positive electrode and the photovoltaic element PV 22 The negative pole of the photovoltaic element PV 22 The positive electrode and the photovoltaic element PV 23 The negative pole of the photovoltaic element PV is connected, ..., 2(n-1) The positive electrode and the photovoltaic element PV 2n Negative connection; The first end of the control voltage source 1 is connected to the positive electrode of the first liquid crystal module 1 , and the second end of the control voltage source 1 is connected to the negative electrode of the first liquid crystal module 1 ; A first end of the control voltage source 2 is connected to the positive electrode of the second liquid crystal module 2 , and a second end of the control voltage source 2 is connected to the negative electrode of the second liquid crystal module 2 .

2. An inversion method of a multi-level photon inverter based on a liquid crystal module, characterized in that: Using the multi-level photon inverter topology based on the liquid crystal module as claimed in claim 1, the inversion method includes the following steps: S1: The first liquid crystal module 1 and the second liquid crystal module 2 are both in a completely light-blocking state, and the photovoltaic elements PV1 and PV2 are both inoperative; S2: The first liquid crystal module 1 is in a light-blocking state, and the second liquid crystal module 2 is in a light-transmitting state. The transmittance of the input side liquid crystal module 2 changes with the voltage of the control voltage source 2. The photovoltaic element PV1 does not work and the photovoltaic element PV2 works; S3: The first liquid crystal module 1 and the second liquid crystal module 2 are both in a completely light-blocking state, and the photovoltaic elements PV1 and PV2 are both inoperative; S4: The second liquid crystal module 2 is in a light-blocking state, the first liquid crystal module 1 is in a light-transmitting state, and the transmittance of the first liquid crystal module 1 changes with the voltage of the control voltage source 1. The photovoltaic element PV2 does not work and the photovoltaic element PV1 works; S5: The first liquid crystal module 1 and the second liquid crystal module 2 are both in a completely light-blocking state, and the photovoltaic elements PV1 and PV2 are not working.

3. The inversion method of the multi-level photon inverter based on the liquid crystal module according to claim 2, wherein the output mode of the inversion method is: S1: output voltage U oc (t) The value of is 0; S2: The photovoltaic element PV2 works and outputs AC multi-level positive half cycle. The number of levels depends on the transparency of the second liquid crystal module 2. T 2 (t) changes with the changes, The output positive half-cycle sine wave is: ， In the formula is the absolute temperature, is the elementary charge, K is the Boltzmann constant, is the reverse saturation current of photovoltaic elements PV1 and PV2, T 1 (t) is the transmittance of the liquid crystal module 1, is the photocurrent coefficient; S3: output voltage U oc (t) The value of is 0; S4: The photovoltaic element PV1 works and outputs an AC multi-level negative half cycle. The number of levels is determined by the transmittance of the first liquid crystal module 1 on the input side. T 1 (t) The sine changes, The output negative half-cycle sine wave is: ， In the formula is the absolute temperature, is the elementary charge, K is the Boltzmann constant, is the reverse saturation current of output side PV1 and output side PV2, T 2 (t) is the transmittance of the second liquid crystal module 2, is the photocurrent coefficient; S5: output voltage U oc (t) The value of is 0.

4. The inversion method of the multi-level photon inverter based on the liquid crystal module according to claim 3, wherein the modulation mode of the liquid crystal module is: S1: Transmittance of the first liquid crystal module 1 T 1 (t) , the second liquid crystal module 2 transmittance T 2 (t) The output result is 0; S2: Transmittance of the first liquid crystal module 1 T 1 (t) is 0, the transmittance of the second liquid crystal module 2 T 2 (t) The formula for permeability is: ， In the formula is the absolute temperature, is the elementary charge, K is the Boltzmann constant, is the reverse saturation current of output side PV1 and output side PV2, is the photocurrent coefficient, S is the surface area of ​​an LED unit; S3: Transmittance of the first liquid crystal module 1 T 1 (t) , the second liquid crystal module 2 transmittance T 2 (t) The output result is 0; S4: Transmittance of the second liquid crystal module 2 T 1 (t) is 0, the transmittance of the first liquid crystal module 1 is T 1 (t) The formula for permeability is: ， In the formula is the absolute temperature, is the elementary charge, K is the Boltzmann constant, is the reverse saturation current of output side PV1 and output side PV2, is the photocurrent coefficient, S is the surface area of ​​an LED unit, is the output photon flux of the LED; S5: Transmittance of the first liquid crystal module 1 T 1 (t) , the second liquid crystal module 2 transmittance T 2 (t) The output is 0.

5. The inversion method of the multi-level photon inverter based on the liquid crystal module according to claim 4, wherein the voltages of the control voltage sources 1 and 2 of the first liquid crystal module 1 and the second liquid crystal module 2 are The modulation method, when When the transmittance of the liquid crystal module is T 1 (t) 、 T 2 (t) With the control voltage source voltage A linear relationship is characterized by: S1: The voltage of the control voltage source 1 and the control voltage source 2 Both ; S2: The voltage of the control voltage source 1 for , the voltage of the control voltage source 2 The formula is: In the formula is the voltage value when the transmittance of the liquid crystal module reaches 90%, is the voltage value when the transmittance of the liquid crystal module reaches 10%; S3: The voltage of the control voltage source 1 , Control voltage source 2 voltage The voltage values ​​are ; S4: the voltage value of the control voltage source 2 for , the voltage value of the control voltage source 1 The formula is: In the formula is the voltage value when the transmittance of the liquid crystal module reaches 90%, is the voltage value when the transmittance of the liquid crystal module reaches 10%; S5: The voltage of the control voltage source 1 , Control voltage source 2 voltage The voltage values ​​are .

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