TW201906277A - Solar power supply wireless power conversion system - Google Patents

Abstract

The invention relates to a solar power supply wireless power conversion system. Primarily, it comprises a switching circuit and a rectifier circuit connected in series and resonance. Thereby when it is operated in a high-frequency environment, the circuits have the characteristics of small size, light weight and low cost. Furthermore, it has more flexibility to achieve different nature of the converter. Meanwhile, it has a characteristic of flexibility switching to reduce the loss in the process to significantly enhance the overall conversion efficiency.

Description

Solar powered wireless power conversion system

The invention relates to a solar-powered wireless power conversion system, in particular to an operation in a high-frequency environment, which has the characteristics of small circuit size, light weight and low cost, and can have more flexibility adjustment space and can achieve different The nature of the converter, while having flexible switching characteristics, reduces the loss during the process, can greatly improve the overall conversion efficiency, and more practical performance characteristics in its overall implementation.

In recent years, science and technology have been changing with each passing day. For the development of science and technology civilization, human beings consume the resources of nature at an extremely fast rate to obtain the energy we need. This process makes the limited resources gradually exhausted. Many wastes that harm the global environment have been created. Due to the lack of demand for various energy sources, energy consumption continues to increase by 2 to 3% per year, causing the existing fossil energy on the planet [Fossil Energy] to face the exhaustion of the environment. However, the large amount of pollutants produced by the burning of fossil energy destroys the ozone layer in the atmosphere, causing the greenhouse effect to warm the global climate, natural disasters continue to occur, the environment is rapidly deteriorating; frequent windstorms, floods, and climate variability, Many factors such as changes in the natural environment and the impact of environmental pollution on people's health.

In the current situation that all kinds of energy are gradually depleted, human beings must find new alternative energy sources, and this new energy must have inexhaustible characteristics. Therefore, actively seeking new energy and solving this crisis is a top priority. At present, many advanced countries have invested in the development and utilization of renewable energy [Renewable Energy]. In terms of natural conditions, renewable energy that may be put into practical use has solar, wind, tidal, geothermal, biomass and so on. Energy, which is most suitable for solar photovoltaic conversion; this kind of energy conversion system, the most important is solar power system that converts solar energy into electric energy by solar cells, and the input sunlight is unlimited as long as the weather conditions are good. There is no need for any energy costs. Due to the lack of self-produced energy in Taiwan, it must rely on energy imports. Due to the geographical advantage of Taiwan, the amount of sunshine is quite abundant and the sunshine time is long. It is quite suitable for solar power generation, and solar energy has zero pollution and pollution-free characteristics. The most promising renewable energy in the century.

In view of this, the inventor has provided a solar-powered wireless power conversion system for the purpose of achieving better practical value by adhering to the rich experience in design, development and actual production of the relevant industry for many years, and researching and improving the existing structure and defects. The purpose of the person.

The main object of the present invention is to provide a solar-powered wireless power conversion system, which is mainly operated in a high-frequency environment, has the characteristics of small circuit size, light weight and low cost, and can have more flexibility adjustment space, and can achieve different The nature of the converter, while having flexible switching characteristics, reduces the loss during the process, can greatly improve the overall conversion efficiency, and more practical performance characteristics in its overall implementation.

The main purpose and effect of the solar-powered wireless power conversion system of the present invention are achieved by the following specific technical means:

The main system includes a switching circuit and a rectifying circuit with series resonance; wherein:

The switching circuit is tied to the input voltage Positive extremes with the first power switch First end and third power switch The first end is connected, and the first power switch is Second end and fourth power switch The first end is connected and the third power switch is made Second end and second power switch The first end is connected, and the input voltage The negative terminal is respectively connected to the fourth power switch The second end and the second power switch The second end is connected to the third power switch The second end and the second power switch A first end of the primary side resonant capacitor is connected between the first end, the second end of the primary side resonant capacitor is connected to the first end of the primary side resonant inductor, and the second end of the primary side resonant inductor is connected To the first power switch The second end and the fourth power switch Between the first ends;

The rectifier circuit is connected to the first end of the secondary side resonant inductor and has a first end of the secondary side resonant capacitor, and the second end of the secondary side resonant capacitor is respectively connected to the first diode Second end and second diode The first end is connected, and the second end of the secondary side resonant inductor is respectively connected to the first capacitor Second end and second capacitor The first end is connected, and then the first diode First end and the first capacitor The first end is connected with an output filter capacitor The first end and the first end of the load, and the second diode Second end and second capacitor The second end is connected with an output filter capacitor The second end and the second end of the load;

The primary side resonance inductance, the primary side resonance capacitance, the secondary side resonance inductance, and the secondary side resonance capacitance are caused to resonate in series.

A preferred embodiment of the solar-powered wireless power conversion system of the present invention further includes a solar photovoltaic array [PV Array], a maximum power tracking system, and a single wafer; the solar photovoltaic array is composed of a plurality of solar photovoltaic modules. a combination of the group [PV Module], the maximum power tracking system is connected to the output end of the solar photovoltaic array, and the single wafer is connected to the maximum power tracking system, and the single wafer receives the solar photovoltaic array The data detected by the feedback circuit disposed between the maximum power tracking system generates a trigger signal to be transmitted to the maximum power tracking system, and the maximum power tracking system outputs an appropriate voltage And to the input end of the connected switching circuit, the switching circuit generates a high-frequency alternating magnetic field, the high-frequency alternating magnetic field is coupled to the rectifying circuit via air, and the rectified DC power supply is supplied by the rectifying circuit The load used for the connection.

A preferred embodiment of the solar powered wireless power conversion system of the present invention, wherein the feedback circuit is provided with a Hall sensor as a switching element.

For a more complete and clear disclosure of the technical content, the purpose of the invention and the effects thereof achieved by the present invention, it is explained in detail below, and please refer to the drawings and drawings:

First, please refer to the first diagram of the system architecture diagram of the present invention. The present invention mainly includes a solar photovoltaic array [PV Array] (1), a maximum power tracking system (2), a single chip (3), a switching circuit. (4), a rectifier circuit (5), a load (6); the solar photovoltaic array (1) is composed of a plurality of solar photovoltaic modules [PV Module] (11) combined in series and parallel, and The maximum power tracking system (2) is connected to the output end of the solar photovoltaic array (1), and the single wafer (3) is connected to the maximum power tracking system (2). Receiving voltage and current data detected by the feedback circuit (31) disposed between the solar photovoltaic array (1) and the maximum power tracking system (2), and the feedback circuit (31) is provided with The [Hall Sensor] (311) is used as a switching element, so that the feedback circuit (31) detects the solar photovoltaic array. 1) outputting voltage and current data, and then generating a trigger signal via the single chip (3), transmitting to the maximum power tracking system (2), and calculating to generate a trigger signal for transmission to the maximum power tracking system (2), Maximum power tracking system (2) outputs an appropriate voltage To the input end of the connected switching circuit (4), the switching circuit (4) generates a high-frequency alternating magnetic field, which is coupled to the rectifying circuit (5) via air, and then uses the The rectifier circuit (5) supplies the rectified DC power to the connected load (6); please refer to the second diagram of the circuit diagram of the present invention, wherein:

The switching circuit (4) is connected to the voltage input by the maximum power tracking system (2) Positive extremes with the first power switch First end and third power switch The first end is connected, and the first power switch is Second end and fourth power switch The first end is connected and the third power switch is made Second end and second power switch The first end is connected, and the voltage input by the maximum power tracking system (2) The negative terminal is respectively connected to the fourth power switch The second end and the second power switch The second end is connected to the third power switch The second end and the second power switch A first end of the primary side resonant capacitor is connected between the first end, the second end of the primary side resonant capacitor is connected to the first end of the primary side resonant inductor, and the second end of the primary side resonant inductor is connected To the first power switch The second end and the fourth power switch Between the first ends.

The rectifier circuit (5) is connected to the first end of the secondary side resonant inductor and has a first end of the secondary side resonant capacitor, and the second end of the secondary side resonant capacitor is respectively connected to the first diode Second end and second diode The first end is connected, and the second end of the secondary side resonant inductor is respectively connected to the first capacitor Second end and second capacitor The first end is connected, and then the first diode First end and the first capacitor The first end is connected with an output filter capacitor The first end and the first end of the load, and the second diode Second end and second capacitor The second end is connected with an output filter capacitor The second end is connected to the second end of the load.

As a result, in the operation of the present invention, since the output voltage and power of the solar photovoltaic array [PV Array] (1) are not fixed values, they change with the change of the sunlight intensity, so that the solar energy is utilized. The maximum power tracking system (2) connected to the output end of the photovoltaic array (1) for optimal use of the solar photovoltaic array (1), and receiving the feedback circuit by using the single chip (3) (31) The detected voltage and current data are calculated to generate a trigger signal for transmission to the maximum power tracking system (2), so that the maximum power tracking system (2) outputs an appropriate voltage. To the input end of the connected switching circuit (4), the switching circuit (4) utilizes the first power switch The second power switch The third power switch The fourth power switch Forming a bridge rectifier to DC voltage Converting into a square wave signal, operating in a zero voltage switching state, converting the square wave voltage into the high frequency sinusoidal voltage and current via the primary side resonant inductor and the primary side resonant capacitor, and the high frequency sinusoidal current flows through the primary side resonance The inductor generates a high frequency alternating magnetic field, and the high frequency alternating magnetic field is coupled to the secondary side resonant inductor of the rectifier circuit (5) via air, so that a high frequency alternating current voltage is induced in the secondary side resonant inductor. Then, the DC power rectified by the high-frequency AC voltage is supplied to the load for use.

Referring to the third diagram of the present invention as shown in the timing chart, the present invention is divided into six working modes for analysis and discussion:

Working mode one [ ]: Please refer to the fourth diagram of the working mode of the present invention as shown in the equivalent circuit diagram. In this working mode, the first power switch And the second power switch Drive signal and High level, the current of the primary side resonant inductor Negative, the current path of the switching circuit (4) is the input voltage →Second power switch Parasitic second switch diode →Primary resonance inductor→primary resonance capacitor→first power switch Parasitic first switch diode . The primary side resonance inductance, the primary side resonance capacitance, the secondary side resonance inductance, and the secondary side resonance capacitance generate series resonance, thereby causing an input voltage The energy is transmitted to the rectifier circuit (5), and the current path through the rectifier circuit (5) is a secondary side resonance capacitor → a secondary side resonance inductor → a second capacitor →Second diode . Double the second capacitance Voltage That is equal to the load voltage . When the power switch is switched, it switches to the next mode.

Working mode two [ ]: Please refer to the fifth diagram of the working mode of the present invention as shown in the schematic diagram of the equivalent circuit. In this working mode, the first power switch And the second power switch Drive signal and High level, the current of the primary side resonant inductor Positive, the current path of the switching circuit (4) is the input voltage →First power switch →Primary resonance inductor→primary resonance capacitor→second power switch . The primary side resonance inductance, the primary side resonance capacitance, the secondary side resonance inductance, and the secondary side resonance capacitance generate series resonance, thereby causing an input voltage The energy is transmitted to the rectifier circuit (5), and the current path through the rectifier circuit (5) is a secondary side resonance capacitor → a secondary side resonance inductor → a second capacitor →Second diode . Double the second capacitance Voltage That is equal to the load voltage . When the power switch is switched, it switches to the next mode.

Working mode three [ ]: Please refer to the sixth diagram of the working mode three equivalent circuit diagram of the present invention. In this working mode, the first power switch And the second power switch Drive signal and High level, the current of the primary side resonant inductor Positive, the current path of the switching circuit (4) is the input voltage →First power switch →Primary resonance inductor→primary resonance capacitor→second power switch . The primary side resonance inductance, the primary side resonance capacitance, the secondary side resonance inductance, and the secondary side resonance capacitance generate series resonance, thereby causing an input voltage The energy is transmitted to the rectifier circuit (5), and the current path through the rectifier circuit (5) is a secondary side resonance inductor → a secondary side resonance capacitor → a first diode →First capacitor . Double the first capacitor Voltage That is equal to the load voltage . When the power switch is switched, it switches to the next mode.

Working mode four [ ]: Please refer to the seventh diagram of the working mode of the present invention as shown in the fourth equivalent circuit diagram. In this working mode, the third power switch And the fourth power switch Drive signal and High level, the current of the primary side resonant inductor Positive, the current path of the switching circuit (4) is the input voltage →Fourth power switch Parasitic fourth switch diode →Primary side resonance inductance→primary side resonance capacitor→third power switch Parasitic third switching diode . The primary side resonance inductance, the primary side resonance capacitance, the secondary side resonance inductance, and the secondary side resonance capacitance generate series resonance, thereby causing an input voltage The energy is transmitted to the rectifier circuit (5), and the current path through the rectifier circuit (5) is a secondary side resonance inductor → a secondary side resonance capacitor → a first diode →First capacitor . Double the first capacitor Voltage That is equal to the load voltage . When the power switch is switched, it switches to the next mode.

Working mode five [ ]: Please refer to the eighth diagram of the working mode of the present invention as shown in the fifth equivalent circuit diagram. In this working mode, the third power switch And the fourth power switch Drive signal and High level, the current of the primary side resonant inductor Negative, the current path of the switching circuit (4) is the input voltage →third power switch →Primary resonance inductor→primary resonance capacitor→fourth power switch . The primary side resonance inductance, the primary side resonance capacitance, the secondary side resonance inductance, and the secondary side resonance capacitance generate series resonance, thereby causing an input voltage The energy is transmitted to the rectifier circuit (5), and the current path through the rectifier circuit (5) is a secondary side resonance inductor → a secondary side resonance capacitor → a first diode →First capacitor . Double the first capacitor Voltage That is equal to the load voltage . When the power switch is switched, it switches to the next mode.

Working mode six [ ]: Please refer to the ninth diagram of the working mode six equivalent circuit diagram of the present invention. In this working mode, the third power switch And the fourth power switch Drive signal and High level, the current of the primary side resonant inductor Negative, the current path of the switching circuit (4) is the input voltage →third power switch →Primary resonance inductor→primary resonance capacitor→fourth power switch . The primary side resonance inductance, the primary side resonance capacitance, the secondary side resonance inductance, and the secondary side resonance capacitance generate series resonance, thereby causing an input voltage The energy is transmitted to the rectifier circuit (5), and the current path through the rectifier circuit (5) is a secondary side resonance inductor → a secondary side resonance capacitor → a first diode →First capacitor . Double the first capacitor Voltage That is equal to the load voltage . When the power switch is switched, it switches to the next mode.

The present invention utilizes the IsSpice simulation software to simulate and analyze the circuit, and finally, in conjunction with the hardware circuit test, compares the actual measured waveform and data with the waveform of the software simulation to compare whether the two meet the requirements. . Set the parameters as follows: input voltage 150V, input current 14.1A, output voltage 425.5V, output current 3.7A, switching frequency f _s =82.1kHz, duty cycle Duty=0.45, mutual inductance M=0.6μH, coupling coefficient k= 0.42, two coil distance 15cm, primary side resonance inductance = 178μH, primary side resonance capacitance = 21nF, primary side resonance frequency f _r1 = 82.1kHz, secondary side resonance inductance = 116μH, secondary side resonance capacitance = 32.3nF, secondary Side resonance frequency f _r2 = 82.2 kHz, load resistance 115 Ω; the following test with analog waveform and implementation results:

Please refer to the tenth figure, the first and second power switch driving voltage signals and the switching voltage measured waveform diagram of the present invention, and the eleventh figure, the first and second power switch driving voltage signals and the switching voltage analog waveform diagram of the present invention, Figure 12 is a third and fourth power switch driving voltage signal and switching voltage measured waveform diagram of the present invention, and a thirteenth diagram of the third and fourth power switch driving voltage signal and switching voltage analog waveform diagram of the present invention, which is represented by a waveform The results show that the measured and simulated waveforms are almost identical. Please refer to the fourteenth embodiment of the present invention, the first and second power switch switching voltage and the flow through the switch current measured waveform diagram, the fifteenth figure of the present invention, the first and second power switch switching voltage and flow through the switch current simulation Waveform diagram, the sixteenth figure, the third and fourth power switch switching voltages and the measured current waveforms flowing through the switch current, the seventeenth figure, the third and fourth power switch switching voltages and the flow current through the switch current waveforms of the present invention As shown, the first power switch The second power switch The third power switch The fourth power switch Both operate at zero current and zero voltage switching conduction, making the present invention highly efficient Please refer to the eighteenth embodiment of the present invention, the primary side resonance capacitor voltage and current measured waveform diagram, the nineteenth embodiment of the present invention, the primary side resonance capacitor voltage and current analog waveform diagram, the twentieth diagram of the first side of the present invention Resonance inductor voltage and current measured waveform diagram, twenty-first diagram of the present invention, the primary side resonant inductor voltage and current analog waveform diagram, the twenty-second diagram of the present invention, the primary side resonant tank voltage and current measured waveform diagram, twentieth The present invention is a secondary side resonant tank voltage and current analog waveform diagram, the twenty-fourth embodiment of the present invention, the secondary side resonant inductor voltage and current measured waveform diagram, the twenty-fifth figure of the present invention, the secondary side resonant inductor voltage And current simulation waveform diagram, twenty-sixth embodiment of the present invention, the secondary side resonance capacitor voltage and current measured waveform diagram, the twenty-seventh diagram of the present invention, the secondary side resonance capacitor voltage and current analog waveform diagram, twenty-eighth The second embodiment of the present invention, the secondary side resonant tank voltage and current measured waveform diagram, the twenty-ninth figure of the present invention, the secondary side resonant tank voltage and current analog waveform diagram, shown by the waveform results Almost as an analog waveform. Please refer to the thirty-first diagram of the first diode voltage and current measured waveform diagram of the present invention, and the thirty-first diagram. The first diode voltage and current analog waveform diagram of the present invention, the thirty-second diagram The second diode voltage and current measured waveform diagram of the invention, and the thirty-third graph, the first diode of the second diode voltage and current of the present invention, the first diode And the second diode Both operate in a zero current switching condition with low switching loss characteristics. Please refer to the thirty-fourth embodiment of the present invention, the first capacitor voltage and current measured waveform diagram, the thirty-fifth graph of the present invention, the first capacitor voltage and current analog waveform diagram, the thirty-sixth figure of the present invention Two capacitor voltage and current measured waveform diagram, thirty-seventh diagram The second capacitor voltage and current analog waveform diagram of the present invention, thirty-eighth diagram The measured voltage waveform of the output voltage and output current of the present invention and the thirty-ninth figure The analog waveform diagram of the output voltage and the output current of the present invention shows that the output voltage is 425.5V, the output current is 3.7A, and the output power is 1574W. The input voltage is 150V, the input current is 14.1A, the input power is 2115W, and the conversion efficiency is calculated to be 74.42%.

Please refer to the graph of the measured efficiency at different input voltages under the condition of fixed load resistance. The lower the input voltage, the lower the converter efficiency. The lower the input voltage, the lower the output power. And most of the power loss is consumed in the reluctance of the primary side resonant inductor and the secondary side resonant inductor air gap, which causes the main cause of low conversion efficiency.

As described above, the implementation of the present invention shows that the present invention is mainly operated in a high frequency environment, and has the characteristics of small circuit size, light weight, and low cost, and the like. It can have more flexible adjustment space, can achieve converters with different properties, and has flexible switching characteristics, which reduces the loss during the process, can greatly improve the overall conversion efficiency, and has more practical functions in its overall implementation. By.

However, the above-described embodiments or drawings are not intended to limit the structure or the use of the present invention, and any suitable variations or modifications of the invention will be apparent to those skilled in the art.

In summary, the embodiments of the present invention can achieve the expected use efficiency, and the specific structure disclosed therein has not been seen in similar products, nor has it been disclosed before the application, and has completely complied with the provisions of the Patent Law. And the request, the application for the invention of a patent in accordance with the law, please forgive the review, and grant the patent, it is really sensible.

(1) ‧‧‧Solar Photovoltaic Array

(11)‧‧‧Solar photovoltaic modules

(2) ‧‧‧Maximum power tracking system

(3) ‧ ‧ single chip

(31)‧‧‧Responsive circuit

(311)‧‧‧ Hall Sensor

(4) ‧‧‧Switching circuit

(5) ‧‧‧Rectifier circuit

(6) ‧ ‧ load

First: Schematic diagram of the system architecture of the present invention

Second picture: schematic diagram of the circuit of the present invention

Third figure: Timing diagram of the present invention

Fourth: Schematic diagram of an equivalent circuit of the working mode of the present invention

Figure 5: Schematic diagram of the equivalent circuit of the working mode of the present invention

Figure 6: Schematic diagram of the three equivalent circuit of the working mode of the present invention

Figure 7: Schematic diagram of the four equivalent circuit of the working mode of the present invention

Figure 8: Schematic diagram of the five equivalent circuit of the working mode of the present invention

Ninth diagram: schematic diagram of the equivalent circuit of the working mode of the present invention

The tenth figure: the measured waveforms of the driving voltage signal and the switching voltage of the first and second power switches of the present invention

Figure 11: Analog waveform diagram of the first and second power switch driving voltage signals and switching voltages of the present invention

Twelfth figure: The measured waveforms of the driving voltage signal and the switching voltage of the third and fourth power switches of the present invention

Thirteenth figure: analog waveform diagram of driving voltage signal and switching voltage of the third and fourth power switches of the present invention

Figure 14: The measured waveforms of the first and second power switch switching voltages and the current flowing through the switch of the present invention

The fifteenth figure: the first and second power switch switching voltages of the present invention and the flow waveforms through the switch current

Figure 16: The measured voltage of the third and fourth power switch switching voltages and the current through the switch current of the present invention

Figure 17: Analog waveform diagram of the third and fourth power switch voltages and currents flowing through the switch of the present invention

Figure 18: The measured waveform of the primary side resonant capacitor voltage and current of the present invention

Figure 19: Analog waveform diagram of the primary side resonant capacitor voltage and current of the present invention

Figure 20: The measured waveform of the primary side resonant inductor voltage and current of the present invention

Twenty-first graph: analog waveform diagram of the primary side resonant inductor voltage and current of the present invention

Twenty-second graph: the measured waveform of the voltage and current of the primary side resonant tank of the present invention

Twenty-third graph: analog waveform diagram of voltage and current of the primary side resonant tank of the present invention

Figure 24: The measured waveform of the secondary side resonant inductor voltage and current of the present invention

Figure 25: Analog waveform diagram of the secondary side resonant inductor voltage and current of the present invention

Figure 26: The measured waveform of the secondary side resonant capacitor voltage and current of the present invention

Figure 27: Analog waveform diagram of the secondary side resonance capacitor voltage and current of the present invention

Twenty-eighth Figure: The measured waveform of the voltage and current of the secondary side resonant tank of the present invention

Twenty-ninth Figure: Analog waveform diagram of voltage and current of the secondary side resonant tank of the present invention

Thirty-fifth: the measured waveform of the first diode of the present invention

Thirty-first graph: analog waveform diagram of voltage and current of the first diode of the present invention

Figure 32: Measured waveform of voltage and current of the second diode of the present invention

Thirty-third figure: analog waveform diagram of voltage and current of the second diode of the present invention

Figure 34: The measured waveform of the first capacitor voltage and current of the present invention

Figure 35: Analog waveform diagram of the first capacitor voltage and current of the present invention

Figure 36: The measured waveform of the second capacitor voltage and current of the present invention

Figure 37: Analog waveform diagram of the second capacitor voltage and current of the present invention

Thirty-eighth Figure: Actual measured waveform of output voltage and output current of the present invention

Thirty-ninth Figure: Analog waveform diagram of output voltage and output current of the present invention

40th map: The measured efficiency curve of the present invention with different input voltages under the condition of fixed load resistance

Claims (3)

A solar-powered wireless power conversion system mainly includes a switching circuit and a rectifier circuit having series resonance; wherein: the switching circuit is connected to the input voltage Positive extremes with the first power switch First end and third power switch The first end is connected, and the first power switch is Second end and fourth power switch The first end is connected and the third power switch is made Second end and second power switch The first end is connected, and the input voltage The negative terminal is respectively connected to the fourth power switch The second end and the second power switch The second end is connected to the third power switch The second end and the second power switch A first end of the primary side resonant capacitor is connected between the first end, the second end of the primary side resonant capacitor is connected to the first end of the primary side resonant inductor, and the second end of the primary side resonant inductor is connected To the first power switch The second end and the fourth power switch The first end of the secondary side resonant inductor is connected to the first end of the secondary side resonant capacitor, and the second end of the secondary side resonant capacitor is respectively connected with the first two Polar body Second end and second diode The first end is connected, and the second end of the secondary side resonant inductor is respectively connected to the first capacitor Second end and second capacitor The first end is connected, and then the first diode First end and the first capacitor The first end is connected with an output filter capacitor The first end and the first end of the load, and the second diode Second end and second capacitor The second end is connected with an output filter capacitor The second end and the second end of the load; the primary side resonant inductor, the primary side resonant capacitor, the secondary side resonant inductor, and the secondary side resonant capacitor are caused to resonate in series. The solar-powered wireless power conversion system of claim 1, further comprising a solar photovoltaic array [PV Array], a maximum power tracking system, and a single wafer; the solar photovoltaic array is composed of several pieces of solar photovoltaic The power module [PV Module] is combined with the maximum power tracking system connected to the output end of the solar photovoltaic array, and the single chip is connected to the maximum power tracking system, and the single chip receives the solar photovoltaic The data detected by the feedback circuit disposed between the electrical array and the maximum power tracking system generates a trigger signal to be transmitted to the maximum power tracking system, and the maximum power tracking system outputs an appropriate voltage And to the input end of the connected switching circuit, the switching circuit generates a high-frequency alternating magnetic field, the high-frequency alternating magnetic field is coupled to the rectifying circuit via air, and the rectified DC power supply is supplied by the rectifying circuit The load used for the connection. The solar-powered wireless power conversion system according to claim 2, wherein the feedback circuit is provided with a Hall sensor as a switching element.