A multi-level photonic inverter based on MEMS optical switch and inverting method

Abstract

This invention discloses a multilevel photonic inverter and its inversion method based on MEMS optical switches. Addressing the problems commonly found in traditional switching inverters, such as complex topology, numerous switching devices, limited number of output levels, and high output waveform distortion, this invention proposes a multilevel photonic inverter and its inversion method based on MEMS optical switches. This method switches the optical transmission path by controlling a micromirror array of MEMS optical switches, thereby achieving PV inversion output. This inversion method completely eliminates power switching devices in the main circuit. Compared to traditional switching converters, the photonic inverter of this invention exhibits advantages such as simple structure, no need for power switching devices, wide application range, and good electrical isolation, while also possessing the advantages of low electromagnetic interference and low output ripple.

Description

Technical Field

[0001] This invention relates to the field of power conversion, and in particular to a multilevel photonic inverter and inverter method based on MEMS optical switches. Background Technology

[0002] Traditional multilevel inverters have a large number of switching devices, complex control strategies, high output ripple, and electromagnetic interference problems. DC-DC photonic transformers without power switching devices have high-quality power output, but currently photonic transformers cannot achieve DC input and AC output without power switching devices, making it difficult to meet the working requirements of AC output and limiting their application scope.

[0003] This invention discloses a multilevel photonic inverter and its inversion method based on MEMS optical switches. Combining the characteristics of optoelectronic materials with electrical output requirements, it achieves energy conversion from DC input to AC output. By controlling the micromirror array of the MEMS optical switches to switch the optical transmission path, PV inverter output is achieved. This addresses the problems of traditional multilevel inverters, such as numerous switching devices, complex control strategies, voltage distortion, and electromagnetic interference. The photonic inverter of this invention, while achieving multilevel output, has advantages such as eliminating the need for power switching devices, simple control strategies, low output ripple, and low electromagnetic interference. It is particularly suitable for fields with high power quality requirements, such as medical equipment and modern communication technologies. Summary of the Invention

[0004] This invention discloses a multilevel photonic inverter and inverter method based on MEMS optical switches. By utilizing the unique characteristics of MEMS optical switches in switching optical paths and the electrical output characteristics of optoelectronic materials, the inverter can achieve multilevel output without the need for power switching devices. Compared with traditional multilevel inverters, it has a simple circuit structure, requires no power switching devices, has a simple control strategy, and good electrical isolation. At the same time, it also has the advantages of low electromagnetic interference and low output ripple, providing a new method for multilevel photonic inverters.

[0005] A multilevel photonic inverter based on a MEMS optical switch, characterized in that it includes: an input-side DC power supply U DC Input side: LD light source, optical fiber, MEMS optical switch; Output side: PV module group PV1, PV2, control module, output load Z;

[0006] The LD light source includes: laser diodes LD1, LD2, ..., LD2. n ;

[0007] The output-side PV module PV1 group: photovoltaic element PV 11 PV 12 , ..., PV 1n ;

[0008] The output-side PV module PV2 group: photovoltaic element PV 21 PV 22 , ..., PV 2n ;

[0009] The DC power supply U DC The positive electrode is connected to the positive electrode of the input-side LD1 light source;

[0010] The DC power supply U DC The negative terminal and the input side LD n Negative connection of the light source;

[0011] The input port of the optical fiber is connected to the output port of the LD beam;

[0012] The input port of the MEMS optical switch is connected to the output port of the optical fiber;

[0013] The output port of the MEMS optical switch is connected to the receiver of the PV module;

[0014] The output-side PV module PV 11 , ..., PV 1n Forward series connection;

[0015] The output-side PV module PV 21 , ..., PV 2n Forward series connection;

[0016] The positive terminal of the output load Z is connected to PV. 11 Positive electrode, PV 21 The negative terminal connection;

[0017] The negative terminal of the output load Z is connected to PV. 1n negative electrode, PV 2n The positive terminal connection;

[0018] Preferably, the input sides LD1, LD2, and LD n The emission wavelength of the light source is matched with the receiving wavelength of the PV1 and PV2 groups of the output-side PV modules, which helps to improve the transmission efficiency of photon energy.

[0019] An inverter method based on a MEMS optical switch and a multilevel photonic inverter includes the following steps:

[0020] S1: The MEMS optical switch has an n:2n micromirror array, where n is the number of input ports and 2n is the number of output ports. The n:2n micromirror array of the MEMS optical switch is defined as follows: the row of MEMS light source input port 1 is defined as [1, x]{x∈1,2,…,2n}, similarly, the row of MEMS light source input port 2 is defined as [2, x]{x∈1,2,…,2n}, and the row of MEMS light source input port n is defined as [n, x]{x∈1,2,…,2n}.

[0021] S2: The control module controls the micromirror array of the MEMS optical switch in a timing manner. When the micromirror is in state 1, the micromirror reflects the incident light beam from the output port to the output port. When the micromirror is in state 0, the micromirror allows the light beam to pass through, and the output port receives no optical power. By changing the light beam transmission path in this way, different voltage levels and positive and negative output levels can be achieved.

[0022] As can be seen from the above technical methods, the embodiments of the present invention have the following beneficial effects:

[0023] This invention discloses a multilevel photonic inverter and inverter method based on MEMS optical switches. By leveraging the freely switchable optical channel characteristics of MEMS optical switches, it achieves multilevel output without power switching devices. Different output levels can be achieved by selecting the number of input and output ports of the MEMS optical switches, making it applicable to DC-AC conversion applications. The multilevel photonic inverter of this invention uses photons as the energy transmission medium. Compared with traditional switching converters, it has advantages such as simple structure, no need for switching devices, simple control strategy, and low electromagnetic interference, thus expanding the application fields of photonic power converters. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings used in the prior art and embodiments. The following drawings are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This invention provides a topology and control flowchart of a multilevel inverter based on a MEMS optical switch.

[0026] Figure 2 The present invention provides a flowchart and schematic diagrams of input and output waveforms for a multilevel inverter and inverter method based on a MEMS optical switch.

[0027] Figure 3 This is a schematic diagram of a seven-level inverter topology based on a MEMS optical switch in an embodiment of the present invention;

[0028] Figure 4 The present invention provides a modal analysis diagram and output waveform diagram of a seven-level inverter based on a MEMS optical switch in an embodiment of the present invention. Detailed Implementation

[0029] To make the objectives, technical solutions, and features of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments that can be obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Specifically, the multi-level photonic inverter provided in this invention can output multiple levels. In practical applications, users can select the number of input and output ports of the MEMS optical switch and the number of PV elements in the PV module according to actual needs to obtain multiple levels. In this application, a seven-level output is taken as an example, namely, a group of photovoltaic elements PV1 and a group of photovoltaic elements PV2, each containing 3 photovoltaic elements.

[0031] Please refer to Figure 3 , Figure 3 This is a schematic diagram of a seven-level photonic inverter topology based on a MEMS optical switch according to the present invention, including: an input-side DC power supply U. DC Input side: LD light source, optical fiber, MEMS optical switch; Output side: PV module group PV1, PV2, control module, output load Z;

[0032] The LD light source includes: laser diodes LD1, LD2, and LD3;

[0033] The output-side PV module PV1 group: photovoltaic element PV 11 PV 12 PV 13 ;

[0034] The output-side PV module PV2 group: photovoltaic element PV 21 PV 22 PV 23 ;

[0035] The DC power supply U DC The positive electrode is connected to the positive electrode of the input-side LD1 light source;

[0036] The DC power supply U DC The negative terminal is connected to the negative terminal of the input-side LD3 light source;

[0037] The input port of the optical fiber is connected to the output port of the LD beam;

[0038] The input port of the MEMS optical switch is connected to the output port of the optical fiber;

[0039] The output port of the MEMS optical switch is connected to the receiver of the PV module;

[0040] The output-side PV module PV 11 PV 12 PV 13 Forward series connection;

[0041] The output-side PV module PV 21 PV 22 PV 23 Forward series connection;

[0042] The positive terminal of the output load Z is connected to PV. 11 Positive electrode, PV 21 The negative terminal connection;

[0043] The negative terminal of the output load Z is connected to PV. 13 negative electrode, PV 23 The positive terminal connection;

[0044] Preferably, the emission wavelengths of the input-side LD1, LD2, and LD3 light sources are matched with the receiving wavelengths of the output-side photovoltaic element groups PV1 and PV2, which helps to improve the transmission efficiency of photon energy.

[0045] An inversion method for a seven-level photonic inverter based on a MEMS optical switch includes the following steps:

[0046] S1: The MEMS optical switch has a [3:6] micromirror array, that is, the MEMS optical switch has 3 input ports and 6 output ports. The [3:6] micromirror array of the MEMS optical switch is defined as follows: the row of MEMS light source input port 1 is defined as [1, x]{x∈1,2,…,6}, similarly, the row of MEMS light source input port 2 is defined as [2, x],{x∈1,2,…,6}, and the row of MEMS light source input port 3 is defined as [3, x]{x∈1,2,…,6}.

[0047] S2: The control module controls the micromirror array of the MEMS optical switch in a timing manner. When the micromirror is in state 1, the micromirror reflects the incident light beam from the output port to the output port. When the micromirror is in state 0, the micromirror allows the light beam to pass through, and the output port receives no optical power. By changing the light beam transmission path in this way, different voltage levels and positive and negative output levels can be achieved.

[0048] Please refer to Figure 4 The working principle and output waveform of a seven-level photonic power converter are described, and its modulation method is as follows:

[0049] According to the definition of the micromirror in S1, when only the [3, 1] micromirror is in state 1, the output positive voltage is: When the micromirrors [3,1] and [2,2] are in state 1, the output positive voltage is: Similarly, when the micromirrors [3,1], [2,2], and [1,3] are in state 1, the output positive voltage is: Positive half-cycle multi-level voltage U O1 The formula for (t) is:

[0050]

[0051] in , This corresponds to the voltage value of a single PV.

[0052] According to the micromirror definition of S1, when only the [3, 4] micromirrors are in state 1, the output negative voltage is: When the micromirrors [3,4] and [2,5] are in state 1, the output negative voltage is: Similarly, when the micromirrors [3,4], [2,5], and [1,6] are in state 1, the output negative voltage is: The negative half-cycle outputs a multi-level voltage. formula:

[0053]

[0054] in , This corresponds to the voltage value of a single PV.

[0055] A multilevel photonic inverter based on MEMS optical switches has a complete output voltage in a single cycle. for:

[0056]

[0057]

[0058] Where T1…T 12 The operating time for each state is T, where T is the time per cycle and N is the number of levels.

[0059] In summary, this invention discloses a multilevel photonic inverter and inverter method based on MEMS optical switches, combining the unique characteristics of MEMS optical switches in switching optical paths and the electrical output characteristics of optoelectronic materials. It completely eliminates power switching devices to achieve DC input and AC output in a photonic inverter, providing a method for realizing multilevel switching and expanding the application areas of photonic converters.

[0060] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them; the description of the embodiments disclosed in this invention enables those skilled in the art to use or implement this invention, and they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these substitutions or modifications do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A multilevel photonic inverter based on a MEMS optical switch, characterized in that, include: Input-side DC power supply U DC Input side: LD light source, optical fiber, MEMS optical switch, control module; Output side: PV module group PV1, PV2, output load Z; The LD light source includes: laser diodes LD1, LD2, ..., LD2. n ; The output-side PV module PV1 group: photovoltaic element PV 11 PV 12 , ..., PV 1n ; The output-side PV module PV2 group: photovoltaic element PV 21 PV 22 , ..., PV 2n ; The DC power supply U DC The positive electrode is connected to the positive electrode of the input-side LD1 light source; The DC power supply U DC The negative terminal and the input side LD n Negative connection of the light source; The input port of the optical fiber is connected to the output port of the LD beam; The input port of the MEMS optical switch is connected to the output port of the optical fiber; The output port of the MEMS optical switch is connected to the receiving port of the PV module; The output-side PV module PV 11 , ..., PV 1n Forward series connection; The output-side PV module PV 21 , ..., PV 2n Forward series connection; The positive terminal of the output load Z is connected to PV. 11 Positive electrode, PV 21 The negative terminal connection; The negative terminal of the output load Z is connected to PV. 1n negative electrode, PV 2n The positive terminal connection; The specific inversion method of the multilevel photonic inverter based on MEMS optical switches is as follows: S1: The MEMS optical switch has an n:2n micromirror array. The n:2n micromirror array of the MEMS optical switch is defined as follows: the row to which the MEMS light source input port 1 belongs is defined as [1, x]{x∈1,2,…,2n}. Similarly, the row to which the MEMS light source input port 2 belongs is defined as [2, x]{x∈1,2,…,2n}, and the row to which the MEMS light source input port n belongs is defined as [n, x]{x∈1,2,…,2n}. S2: The control module controls the micromirror array of the MEMS optical switch in a timing manner. When the micromirror is in state 1, the micromirror reflects the incident light beam from the output port to the output port. When the micromirror is in state 0, the micromirror allows the light beam to pass through, and the output port does not receive any optical power. By changing the light beam transmission path in this way, different voltage levels and positive and negative output levels can be achieved. According to the definition of the S1 micromirror, the micromirror is time-controlled to achieve a multi-level positive voltage output. The specific method is as follows: When only the [1, n] micromirrors are in state 1, the output positive voltage is: When the micromirrors [1, n] and [2, n-1] are in state 1, the output positive voltage is: Similarly, when the micromirrors [1, 1], [2, n-1], ..., [n, 1] are in state 1, the output positive voltage is: ; According to the definition of the S1 micromirror, the micromirror is time-controlled to achieve multi-level negative voltage output. The specific method is as follows: When only the [n, n+1] micromirrors are in state 1, the output negative voltage is: When the micromirrors [n, n+1] and [2, 2n-1] are in state 1, the output negative voltage is: Similarly, when the micromirrors [n, n+1], [2, 2n-1]...[1, 2n] are in state 1, the output negative voltage is: .

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