Microwave wireless energy transfer rectification side characteristic simulator and simulation method

Abstract

The invention provides a microwave wireless energy transmission rectification side characteristic simulator and a simulation method, and particularly relates to the technical field of wireless electric energy transmission. The method comprises the following steps: 1, testing a general rectification network under different input powers and different loads to obtain the external characteristics of the rectification network; 2, constructing a rectification network physical characteristic model on the basis of the general rectification network; 3, performing parameter identification on the physical characteristic model of the rectification network by using a particle swarm optimization (PSO) algorithm based on the external characteristics measured by the rectification network to obtain a specific numerical model of the rectification network; 4, constructing a Boost circuit to simulate the output characteristics of the numerical model of the Boost circuit; and step 5, based on the Boost circuit, adopting a point-by-point approximation algorithm to enable the output characteristics of the Boost circuit to be consistent with the specific numerical model of the rectification network. The method has the beneficial effects that the parameters of the physical characteristic model of the rectification network are identified through the PSO algorithm, and the Boost circuit is constructed, so that the simulator can accurately simulate the external characteristics of the rectification network.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of wireless power transmission, and in particular to a microwave wireless power transmission rectifying side characteristic simulator and a simulation method. Background Art

[0002] Microwave Power Transmission (MPT) is a research hotspot in WPT systems. Microwave power transmission is the wireless transmission of a large amount of power from one location to another at microwave frequencies. It uses space electromagnetic waves as energy carriers to convert electrical energy into microwaves, and realizes energy transmission through transceiver antennas. Microwave wireless energy transmission (MPT), as a revolutionary and disruptive technology in the field of energy transmission, is the most important way to achieve high-power wireless energy transmission over long distances (tens of kilometers or even farther) in the atmosphere, and its military-civilian integration application prospects are broad and far-reaching. The research on MPT is mainly driven by the concept of space solar power generation proposed by Dr. Peter Glaser of Arthur D. Little. The application of WPT technology in short-distance and low-power microsystems began in the 1990s.

[0003] The microwave wireless energy transmission rectifier side characteristic simulator is mainly used for the platform support of the external characteristic research and convergence experiment of the multi-channel rectifier network. This technology aims to replace the expensive real rectifier network with a simulator, thereby realizing the external characteristic analysis of the multi-channel rectifier network and the energy convergence experiment platform support under different series and parallel connections. It has potential application value in the fields of microwave wireless energy transmission, so the present invention provides a microwave wireless energy transmission rectifier side characteristic simulator and a simulation method. Summary of the invention

[0004] In order to solve the deficiencies of the prior art, the present invention provides a microwave wireless energy transmission rectifier side characteristic simulator and a simulation method.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0006] A microwave wireless energy transmission rectifier side characteristic simulator and simulation method, comprising:

[0007] Step 1: Test the general rectifier network under different input powers and different loads to measure the external characteristics of the rectifier network;

[0008] Step 2: construct a rectifier network physical characteristic model based on the general rectifier network; Step 3:

[0009] Based on the external characteristics measured by the rectifier network, a particle swarm optimization algorithm (PSO) is used to perform parameter identification on the physical characteristic model of the rectifier network to obtain a specific numerical model of the rectifier network;

[0010] Step 4: Construct a Boost circuit to simulate the output characteristics of its numerical model;

[0011] Step 5: Based on the Boost circuit, a point-by-point approximation algorithm is used to make its output characteristics consistent with the specific numerical model of the rectifier network.

[0012] The energy conversion process of the microwave wireless energy transmission system includes a DC source, which is transmitted to the transmitting antenna through DC-RF conversion, receives microwave input through the receiving antenna through free space transmission, enters the rectifier network through a low-pass filter, and then enters the DC side through a DC filter to supply the load.

[0013] The single-channel rectifying unit comprises a low-pass filter, which receives the microwave energy from the receiving antenna through the low-pass filtering, and outputs the microwave energy through the rectifying network and the DC filter to connect to the DC side load.

[0014] In the step 2, under stable input power conditions, the external characteristic curve of the physical characteristic model of the rectifier network is measured, and the measured external characteristic data is matched with the physical model and formula 1:

[0015]

[0016] In the step 3, the particle swarm optimization algorithm (PSO) is used to optimize the model parameters I cs ,a,I0,R p , R s Identification is performed to achieve complete fitting of the external characteristic curve.

[0017] In step 5, after the model parameters are determined, a Boost circuit is used to replace the real rectifier network to simulate its output characteristics under different load conditions. The specific method is as follows:

[0018] (i) Real-time acquisition of Boost circuit output voltage U O , input it into the physical model of the rectifier network output characteristics, and calculate the current reference current I ref ;

[0019] (ii) Use the point-by-point approximation algorithm to calculate the output current I of the Boost circuit. o Approximation to reference current I ref , ensuring that the output characteristics of the Boost circuit under different loads are consistent with the rectification network.

[0020] In the step five, a physical simulator of the Boost circuit rectifier network is made, and finally the Boost circuit can simulate the characteristics of the rectifier network under different load conditions. It can replace the real rectifier network to complete the convergence experiment, save experimental costs and improve experimental efficiency, and provide support for the external characteristic research of multi-channel rectifier networks and the convergence experiment platform.

[0021] A microwave wireless energy transmission rectifier side characteristic simulator comprises a simulator chassis, a simulator array is arranged inside the simulator chassis, the simulator array is composed of a plurality of simulator modules, a control circuit board, a temperature monitoring sensor, a heat dissipation module and a display module are arranged inside the simulator chassis, the control circuit board and the temperature monitoring sensor, the heat dissipation module, the display module and the plurality of simulator modules are electrically connected, the plurality of simulator modules comprise an output interface, an input interface and an Ethernet interface, the output interface, the input interface, the Ethernet interface and the display screen of the display module are located on the side surface of the simulator chassis, a plurality of heat dissipation windows are evenly arranged on the side of the simulator chassis, a heat dissipation fan is installed on each of the heat dissipation windows, and the heat dissipation fan is installed inside the simulator chassis, a heat dissipation structure is arranged on the side of the simulator chassis, and the heat dissipation structure is a plurality of heat dissipation strips arranged on the side of the simulator chassis, and the plurality of heat dissipation strips are evenly distributed in parallel.

[0022] A control panel is arranged on the upper part of the simulator case, and operation buttons are arranged on the lower part of the control panel.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. The PSO algorithm is used to identify the parameters of the physical model of the rectifier network, so that the simulator can accurately reproduce the external characteristics of the rectifier network under different load conditions.

[0025] 2. Dynamic output control: Using a point-by-point approximation algorithm, the output current of the Boost circuit approaches the calculated reference current in real time, achieving consistency with the output characteristics of the actual rectifier network.

[0026] 3. Efficient and low-cost experimental alternative: The simulator can replace the real rectifier network for energy converging experiments, providing support for the platform for multi-channel rectifier network external characteristic research and converging experiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of an energy conversion and rectification unit of a microwave wireless energy transmission system of the present invention;

[0028] Figure 2 is the external characteristic curve of the rectifier network of the present invention;

[0029] Figure 3 A physical model of the output characteristics of the rectifier network of the present invention;

[0030] Figure 4 It is a schematic diagram of the three-dimensional structure of the simulator of the present invention;

[0031] Figure 5 It is a schematic diagram of the internal structure of the simulator of the present invention;

[0032] Figure 6 It is a schematic diagram of the structure of the simulator control system of the present invention;

[0033] Figure 7 It is a schematic diagram of the structure of the Boost control circuit of the present invention.

[0034] The numbers shown in the accompanying drawings are: 1. simulator chassis; 2. simulator array; 3. control circuit board; 4. temperature monitoring sensor; 5. heat dissipation module; 6. display module; 7. output interface; 8. input interface; 9. Ethernet interface; 10. display screen; 11. heat dissipation window; 12. heat dissipation fan; 13. heat dissipation structure. DETAILED DESCRIPTION

[0035] The present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope limited by the application.

[0036] A microwave wireless energy transmission rectifier side characteristic simulator and simulation method, comprising:

[0037] Step 1: Test the general rectifier network under different input powers and different loads to measure the external characteristics of the rectifier network;

[0038] Step 2: constructing a rectifier network physical characteristic model based on the general rectifier network;

[0039] Step 3: Based on the external characteristics measured by the rectifier network, a particle swarm optimization algorithm (PSO) is used to perform parameter identification on the physical characteristic model of the rectifier network to obtain a specific numerical model of the rectifier network;

[0040] Step 4: Construct a Boost circuit to simulate the output characteristics of its numerical model;

[0041] Step 5: Based on the Boost circuit, a point-by-point approximation algorithm is used to make its output characteristics consistent with the specific numerical model of the rectifier network.

[0042] In step one, the energy conversion process of the microwave wireless energy transmission system includes a DC source, which is transmitted to the transmitting antenna through DC-RF conversion, receives microwave input through the receiving antenna through free space transmission, enters the rectifier network through a low-pass filter, and then enters the DC side through a DC filter to supply the load.

[0043] The single-channel rectifier unit includes a low-pass filter, which receives the microwave energy from the receiving antenna and outputs it through a rectifier network and a DC filter to connect to the DC side load.

[0044] like Figure 3 As shown, in step 2, under stable input power conditions, the external characteristic curve of the rectifier network physical characteristic model is measured, and the measured external characteristic data is matched with the physical model and formula 1:

[0045]

[0046] The resistor includes a fixed value resistor R S and R p , fixed value resistor R S and R p Series, u r is the resistance across the circuit, i r For R S The current, I cs , a is a constant value.

[0047] In step 3, the particle swarm optimization algorithm (PSO) is used to optimize the model parameters I cs ,a,I0,R p , R s Identification is performed to achieve complete fitting of the external characteristic curve.

[0048] like Figure 3 As shown, in step 5, after the model parameters are determined, the Boost circuit is used to replace the real rectifier network to simulate its output characteristics under different load conditions. The specific method is:

[0049] (i) Real-time acquisition of Boost circuit output voltage U O , input it into the physical model of the rectifier network output characteristics, and calculate the current reference current I ref ;

[0050] (ii) Use the point-by-point approximation algorithm to calculate the output current I of the Boost circuit. o Approximation to reference current I ref , ensuring that the output characteristics of the Boost circuit under different loads are consistent with the rectification network.

[0051] In step five, a physical simulator of the Boost circuit rectifier network is made, and finally the Boost circuit can simulate the characteristics of the rectifier network under different load conditions. It can replace the real rectifier network to complete the convergence experiment, save experimental costs and improve experimental efficiency, and provide support for the external characteristic research of multi-channel rectifier networks and the convergence experiment platform.

[0052] A microwave wireless energy transmission rectifier side characteristic simulator comprises a simulator case 1, a simulator array 2 is arranged inside the simulator case 1, the simulator array 2 is composed of a plurality of simulator modules, a control circuit board 3, a temperature monitoring sensor 4, a heat dissipation module 5 and a display module 6 are arranged inside the simulator case 1, the control circuit board 3 and the temperature monitoring sensor 4, the heat dissipation module 5, the display module 6 and the plurality of simulator modules are electrically connected, the plurality of simulator modules 2 respectively comprise an output interface 7, an input interface 8 and an Ethernet interface 9, the output interface 7, the input interface 8, the Ethernet interface 9 and a display screen 10 of the display module 6 are located on the side surface of the simulator case 1, a plurality of heat dissipation windows 11 are evenly arranged on the side of the simulator case 1, a heat dissipation fan 12 is installed on each heat dissipation window 12, and the heat dissipation fan 12 is installed inside the simulator case 1, a heat dissipation structure 13 is arranged on the side of the simulator case 1, the heat dissipation structure 13 is a plurality of heat dissipation strips arranged on the side of the simulator case 1, and the plurality of heat dissipation strips are evenly distributed in parallel, among which only one of the output interface 7, the input interface 8 and the Ethernet interface 9 is shown, and the others are not shown.

[0053] Specifically, the simulator array includes multiple simulator modules, each of which includes an independent Boost circuit. The Boost circuit is as follows: Figure 7 As shown, it has its own independent power input and output interfaces. The main task of the simulator is to simulate the characteristics of the microwave rectifier side, generate corresponding output power after receiving the control signal, dissipate the internal heat through multiple cooling fans and cooling structures while ensuring good air circulation, and monitor the internal temperature through the temperature monitoring sensor. The temperature sensor is a device for real-time monitoring of the ambient temperature. The temperature monitoring sensor can monitor the temperature of various places inside the simulator chassis by setting multiple ones, and display the monitoring data on the display screen in real time.

[0054] Furthermore, a control panel 14 is provided on the upper part of the simulator chassis 1, and control buttons 15 are provided on the lower part of the control panel. The control panel is located on the front of the chassis, and the corresponding control status can be displayed through the control panel. The internal power input of the simulator chassis, the display system status and the operation status of each simulator are controlled through the control buttons.

Claims

1. A method for simulating the characteristics of a microwave wireless energy transmission rectifier, characterized in that: include Step 1: Test the general rectifier network under different input powers and different loads to measure the external characteristics of the rectifier network; Step 2: constructing a rectifier network physical characteristic model based on the general rectifier network; Step 3: Based on the external characteristics measured by the rectifier network, a particle swarm optimization algorithm (PSO) is used to perform parameter identification on the physical characteristic model of the rectifier network to obtain a specific numerical model of the rectifier network; Step 4: Construct a Boost circuit to simulate the output characteristics of its numerical model; Step 5: Based on the Boost circuit, a point-by-point approximation algorithm is used to make its output characteristics consistent with the specific numerical model of the rectifier network.

2. A microwave wireless energy transmission rectification side characteristic simulation method according to claim 1, characterized in that: In the step 1, the energy conversion process of the microwave wireless energy transmission system includes a DC source, which is transmitted to the transmitting antenna through DC-RF conversion, receives microwave input through the receiving antenna through free space transmission, enters the rectifier network through a low-pass filter, and then enters the DC side through a DC filter to supply the load.

3. A microwave wireless energy transmission rectification side characteristic simulation method according to claim 2, characterized in that: The single-channel rectifying unit comprises a low-pass filter, which receives the microwave energy from the receiving antenna through the low-pass filtering, and outputs the microwave energy through the rectifying network and the DC filter to connect to the DC side load.

4. The method for simulating the characteristics of the microwave wireless energy transmission rectification side according to claim 1, characterized in that: In the step 2, under stable input power conditions, the external characteristic curve of the physical characteristic model of the rectifier network is measured, and the measured external characteristic data is matched with the physical model and formula 1:

5. The method for simulating the characteristics of the microwave wireless energy transmission rectification side according to claim 1, characterized in that: In the step 3, the particle swarm optimization algorithm (PSO) is used to optimize the model parameters I cs ,a,I0,R p , R s Identification is performed to achieve complete fitting of the external characteristic curve.

6. The method for simulating the characteristics of the microwave wireless energy transmission rectification side according to claim 1, characterized in that: In step 5, a Boost circuit is used to replace a real rectifier network to simulate its output characteristics under different load conditions. The specific method is as follows: (i) Real-time acquisition of Boost circuit output voltage U O , input it into the physical model of the rectifier network output characteristics, and calculate the current reference current I ref ; (ii) Use the point-by-point approximation algorithm to calculate the output current I of the Boost circuit. o Approximation to reference current I ref , ensuring that the output characteristics of the Boost circuit under different loads are consistent with the rectification network.

7. The method for simulating the characteristics of the microwave wireless energy transmission rectification side according to claim 1, characterized in that: In the step five, a physical simulator of the Boost circuit rectifier network is made, and finally the Boost circuit can simulate the characteristics of the rectifier network under different load conditions. It can replace the real rectifier network to complete the convergence experiment, save experimental costs and improve experimental efficiency, and provide support for the external characteristic research of multi-channel rectifier networks and the convergence experiment platform.

8. A microwave wireless energy transmission rectifier side characteristic simulator, comprising a simulator chassis (1), characterized in that: The simulator case (1) is provided with a simulator array (2) inside, the simulator array (2) is composed of a plurality of simulator modules, the simulator case (1) is provided with a control circuit board (3), a temperature monitoring sensor (4), a heat dissipation module (5) and a display module (6), the control circuit board (3) and the temperature monitoring sensor (4), the heat dissipation module (5), the display module (6) and the plurality of simulator modules are electrically connected, the plurality of simulator modules include an output interface (7), an input interface (8) and an Ethernet interface (9), the output interface (7) , an input interface (8), an Ethernet interface (9) and a display screen (10) of a display module (6) are located on the side surface of the simulator case (1); a plurality of heat dissipation windows (11) are evenly arranged on the side of the simulator case (1); a heat dissipation fan (12) is installed on each of the heat dissipation windows (11), and the heat dissipation fan (12) is installed inside the simulator case (1); a heat dissipation structure (13) is arranged on the side of the simulator case (1); the heat dissipation structure (13) is a plurality of heat dissipation strips arranged on the side of the simulator case (1), and the plurality of heat dissipation strips are evenly distributed in parallel.

9. A microwave wireless energy transmission rectifier side characteristic simulator according to claim 8, characterized in that: A control panel (14) is arranged on the upper part of the simulator case (1), and an operation button (15) is arranged on the lower part of the control panel.

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