CN106549509B - Magnetic coupling resonant wireless energy transmission device and method - Google Patents

Abstract

The invention discloses a magnetic coupling resonant wireless energy transmission device and a magnetic coupling resonant wireless energy transmission method. The transmitting device comprises a high-frequency power supply, an impedance matching network, a detection system and a transmitting coil. The receiving device comprises a receiving coil, a rectifying and filtering circuit, a cascade conversion circuit, a control system and a load. The invention adds a real-time detection and automatic regulation device in a wireless energy transmission system. When the transmission distance and the load change, the transmission performance of the system is detected in real time, free automatic control and adjustment can be realized according to the requirements of people, and the system can realize high-power and high-efficiency transmission. The method has great significance for fully exerting the advantage of long distance in the technology and enhancing the practicability of the technology.

Description

Magnetic coupling resonant wireless energy transmission device and method

technical field

The invention relates to the technical field of wireless energy transmission, in particular to a magnetic coupling resonance wireless energy transmission device and method.

Background technique

At this stage, the transmission of electric energy is mainly carried out in a wired manner (that is, using cables as the electric energy transmission medium), so losses are prone to occur during electric energy transmission, which reduces transmission efficiency; the aging of lines and the occurrence of tip discharges will also affect power consumption. The life and safety of the equipment; at the same time, it is difficult to charge, maintain, and have poor flexibility in harsh environments such as rain and snow, human implanted medical devices, underwater, and mines. Many disadvantages of the above traditional wired charging can be effectively solved by wireless energy transmission technology. Wireless energy transmission, also known as non-contact power transmission, refers to the transfer of electric energy from the power supply side to the load side without any wire connection. Since the wire is omitted, it has stronger flexibility, higher safety and stability, and is more in line with the future social development trend.

Among the three common wireless energy transmission technologies electromagnetic induction, magnetic coupling resonance and microwave radiation, the magnetic coupling resonance has a longer transmission distance than the electromagnetic induction; compared with the microwave radiation, the transmission efficiency is higher and can Realizing high-power and high-efficiency transmission over medium and long distances, it has shown great application potential in many fields such as portable devices, human implantable medicine, smart homes, and electric vehicles, so it is more favored by people. However, magnetic coupling resonant wireless energy transfer technology also has two key problems: ① output power and transmission efficiency are often not compatible; ② sensitive to changes in distance and load. When the distance or load changes, the load of the system will deviate from the load with the best output power or the load with the best transmission efficiency, which will greatly reduce the output power and transmission efficiency of the system. Therefore, a real-time detection and automatic adjustment device is added to the wireless energy transmission system. When the transmission distance and load change, the transmission performance of the system can be detected in real time and can realize free automatic control and adjustment according to people's requirements to ensure that the system can achieve large energy consumption. Power, high-efficiency transmission. This is of vital significance to give full play to the long-distance advantages of the technology and enhance the practicability of the technology.

Contents of the invention

The technical problem to be solved by the present invention is that the existing magnetic coupling resonant wireless energy transmission cannot take into account both output power and transmission efficiency, and is sensitive to changes in distance and load. A magnetic coupling resonant wireless energy transmission device and method.

In order to solve the above problems, the present invention is achieved through the following technical solutions:

A magnetically coupled resonant wireless energy transmission device includes a transmitting device and a receiving device. The above-mentioned transmitting device includes a high-frequency power supply, an impedance matching network, a detection system and a transmitting coil; the detection system includes a first detection unit, a transmitting microcontroller and a wireless transmitting module; the output end of the high-frequency power supply passes through the input of the impedance matching network and the transmitting coil terminal connection; the input terminal of the first detection unit is connected with the output terminal of the high-frequency power supply, the output terminal of the first detection unit is connected with the transmitting microcontroller, and the output terminal of the transmitting microcontroller is connected with the input terminal of the wireless transmitting module. The receiving device includes a receiving coil, a rectification filter circuit, a cascade conversion circuit, a control system and a load; the cascade conversion circuit includes a Boost conversion circuit and a Buck conversion circuit; the control system includes a second detection unit, a third detection unit, a receiving micro-controller Receiver and wireless receiving module; the output end of the receiving coil is connected to the input end of the Boost conversion circuit through the rectification and filtering circuit, the output end of the Boost conversion circuit is connected to the input end of the Buck conversion circuit, and the output end of the Buck conversion circuit is connected to the load; the wireless receiving module The input end of the wireless transmission module is wirelessly connected with the output end of the wireless receiving module, and the output end of the wireless receiving module is connected with the input end of the receiving microcontroller; the input end of the second detection unit is connected with the output end of the rectification filter circuit, and the output end of the third detection unit The input end is connected to the output end of the Boost conversion circuit, and the output ends of the second detection unit and the third detection unit are connected to the input end of the receiving microcontroller at the same time; the output end of the receiving microcontroller is connected to the control of the Boost conversion circuit and the Buck conversion circuit end.

In particular, the first detection unit includes a first voltage detection unit and a first current detection unit. The first voltage detection unit is made up of a first voltage sensor, a first voltage signal conditioning circuit and a first voltage A/D conversion circuit; the first voltage sensor is arranged at the output end of the high-frequency power supply, and the input end of the first voltage signal conditioning circuit It is connected with the output terminal of the first voltage sensor, the output terminal of the first voltage signal conditioning circuit is connected with the input terminal of the first voltage A/D conversion circuit, and the output terminal of the first voltage A/D conversion circuit is connected with the transmitting microcontroller . The first current detection unit is made up of the first current sensor, the first current signal conditioning circuit and the first current A/D conversion circuit; the first current sensor is arranged at the output end of the high-frequency power supply, and the input end of the first current signal conditioning circuit Connected to the output terminal of the first current sensor, the output terminal of the first current signal conditioning circuit is connected to the input terminal of the first current A/D conversion circuit, and the output terminal of the first current A/D conversion circuit is connected to the transmitting microcontroller .

In particular, the second detection unit includes a second voltage detection unit and a second current detection unit. The second voltage detection unit is made up of a second voltage sensor, a second voltage signal conditioning circuit and a second voltage A/D conversion circuit; the second voltage sensor is arranged at the output end of the rectification filter circuit, and the input end of the second voltage signal conditioning circuit Connected to the output terminal of the second voltage sensor, the output terminal of the second voltage signal conditioning circuit is connected to the input terminal of the second voltage A/D conversion circuit, and the output terminal of the second voltage A/D conversion circuit is connected to the receiving microcontroller . The second current detection unit is made up of a second current sensor, a second current signal conditioning circuit and a second current A/D conversion circuit; the second current sensor is arranged at the output end of the rectification filter circuit, and at the input end of the second current signal conditioning circuit It is connected with the output terminal of the second current sensor, the output terminal of the second current signal conditioning circuit is connected with the input terminal of the second current A/D conversion circuit, and the output terminal of the second current A/D conversion circuit is connected with the receiving microcontroller .

In particular, the third detection unit is a third voltage detection unit. The third voltage detection unit is made up of a third voltage sensor, a third voltage signal conditioning circuit and a third voltage A/D conversion circuit; the third voltage sensor is arranged on the output end of the Boost conversion circuit, and the input end of the third voltage signal conditioning circuit Connected to the output terminal of the third voltage sensor, the output terminal of the third voltage signal conditioning circuit is connected to the input terminal of the third voltage A/D conversion circuit, and the output terminal of the third voltage A/D conversion circuit is connected to the receiving microcontroller .

Specifically, the transmitting microcontroller is a single chip microcomputer, and the receiving controller is a digital signal processor.

In particular, the structure of the transmitting coil and the receiving coil is the same, and the centers of the two are fixed on the same horizontal line.

A magnetic coupling resonance type wireless energy transmission method, comprising the following steps:

The high-frequency power supply outputs high-frequency AC power; the high-frequency AC power passes through the impedance matching network to form a conjugate match, maximize the output power of the high-frequency power supply, and then input the power to the transmitting coil; the transmitting coil resonates and generates AC around it. changing electromagnetic field;

The receiving coil resonates, generates an electromagnetic field resonating at the same frequency, forms an energy receiving channel, obtains coupling resonance energy, and then generates an alternating current at the same frequency; the rectifying and filtering circuit converts the energy received by the receiving coil into a stable direct current; cascaded conversion circuit Regulate and process the direct current to obtain a voltage or current suitable for load power supply, supply power to the load, and realize wireless transmission of electric energy;

When the system is running, the first detection unit of the detection system collects the input information of the system, that is, the output voltage and output current of the high-frequency power supply, and sends them to the transmitting microcontroller after signal conditioning and A/D conversion, and the transmitting microcontroller passes through The wireless transmitting module sends out the system input information; the wireless receiving module of the control system receives the system input information sent by the wireless transmitting module and sends it to the receiving microcontroller; at the same time, the second detection unit of the control system collects the system output The information, that is, the output voltage and output current of the rectification and filtering circuit, is sent to the receiving microcontroller after signal conditioning and A/D conversion; the third detection unit collects the working voltage of the cascaded conversion circuit, that is, the output voltage of the Boost conversion circuit , and sent to the receiving microcontroller after signal conditioning and A/D conversion;

When the load or distance of the system changes, the receiving microcontroller of the control system outputs a PWM signal with a certain disturbance to adjust the duty cycle of the Boost conversion circuit and the duty cycle of the Buck conversion circuit in the cascaded conversion circuit. The power of the system is compared to determine whether the disturbance direction is correct or not; if the disturbance direction is correct, continue to disturb the output signal in the original direction for adjustment; if the disturbance direction is wrong, perform disturbance adjustment in the opposite direction until two times before and after The adjustment of the system ensures that the variation of the power factor of the system is controlled within the allowable range. At this time, the system works under the ideal load condition that maximizes the power factor to achieve optimal load tracking.

Compared with prior art, the present invention has following characteristics:

1. In the control system, the evaluation index based on the power of efficacy is adopted, and the detection unit is set at the transmitting end to detect the input power of the system; the detection unit is set at the receiving end to detect the output power of the system (ignoring the energy loss of the cascaded circuit), Considering the output power and efficiency of the system at the same time, it can freely change the output power and transmission efficiency of the system to ensure that the system has good comprehensive performance, which makes up for the defect that only single optimal power and efficiency can be guaranteed in traditional control;

2. The cascaded Boost conversion circuit and Buck conversion circuit are used, which not only avoids the problems of traditional impedance matching network or large volume or low matching accuracy, but also facilitates the separate adjustment and control of the microcontroller, which improves the controllability and performance of the system. Stability of energy transmission;

3. Based on the electromagnetic coupling resonance technology to realize medium-distance wireless energy transmission, it has the advantages of high-efficiency and non-radiative energy transmission;

4. When the distance or load changes, the system cannot freely change the output power and transmission efficiency of the control system according to people's requirements, and the problem that the output power and transmission efficiency cannot be balanced.

Description of drawings

Figure 1 is the equivalent circuit model of the MCR-WPT system based on the string topology.

Fig. 2 is a structural block diagram of the present invention.

Fig. 3 is a schematic diagram of the structure of the detection unit of the present invention.

Fig. 4 is a schematic diagram of a cascaded transformation topology circuit at the receiving end of the present invention.

Detailed ways

The present invention will be further described below in conjunction with examples, but the present invention is not limited to these examples.

The MCR-WPT device based on the optimal load tracking of power power uses power power as the control concept. Combined with Figure 1, the concept is introduced as follows:

The equivalent circuit model of the MCR-WPT system using the string topology is shown in Figure 1. In the figure, L ₁ , L ₂ , C ₁ , C ₂ , R ₁ , and R ₂ are the equivalent inductance, equivalent capacitance, and equivalent resistance of the transmitting coil and receiving coil, respectively. I ₁ , I ₂ are the currents in the transmitting coil and the receiving coil respectively, M is the mutual inductance between the two coils, D is the distance between the two coils, _RL is the equivalent load, and U _S is the high-frequency power supply. From Figure 1, the calculation formulas of output power and transmission efficiency of the system are formula (1) and formula (2):

From equations (1) and (2), it can be seen that there are the maximum output power load R _LP and the best transmission efficiency load R _Lη to maximize the output power and transmission efficiency of the system respectively, but R _LP > R _Lη , that is, there is no optimal An optimal workload maximizes both system output power and efficiency. Therefore, within the load interval [R _Lη , R _LP ], the transmission performance of the system transitions from the maximum transmission efficiency to the maximum output power. When the load is closer to R _Lη , the system transmission efficiency is greater; when the load is closer to R _LP , the greater the output power of the system. In order to take into account the output power and transmission efficiency of the system and realize the free transformation of the two, the present invention proposes to adopt a new evaluation index of power efficiency, specifically as formula (3):

In the formula, n and m are the powers of P and η respectively, which are used to represent the weight of the two in a system evaluation process. If n is much larger than m or m=0, it means that in this system evaluation process, only the output power of the system is concerned; if m is much larger than n or n=0, it means that in this evaluation process, only the system output power is concerned. Transmission efficiency; if m=n, it means that in this evaluation process, the output power and transmission efficiency of the system are paid attention to at the same time, and the importance of the two is at the same position; if m is slightly greater than n or n is slightly greater than m, it means that the evaluation The system is slightly biased towards the transmission efficiency or output power of the system. Equation (3) can be obtained by calculating the partial derivative with respect to the load. In the formula, Z _m =ω×M, and both m and n are not less than 1.

It can be seen from formula (4) that there is an optimal power load to maximize formula (3), as shown in formula (5):

The optimal load R _LΦ that maximizes the power efficiency is within the interval between the maximum output power load R _LP and the best transmission efficiency load R _Lη , namely: R _LΦ ∈[R _Lη , R _LP ]. Therefore, according to the formula (5), by setting the values of m and n reasonably, the optimal load R _LΦ can be adjusted so that the efficiency power can be maximized, and the workload of the system can be transformed to obtain the power efficiency through a certain conversion device. When the maximum load value is obtained, that is, dynamic tracking enables the power efficiency to obtain the maximum load, and the output power and transmission efficiency of the system can be freely controlled according to people's wishes, and high-power and high-efficiency transmission of the system can be guaranteed.

In order to convert the load _RL to the efficiency power to obtain the maximum optimal load _RLΦ , a DC-DC conversion method can be used. In order to realize the impedance transformation in any range from small to large load, the form of cascade connection of Boost transformation circuit and Buck transformation circuit can be adopted. Thus, the relationship between _RL and _RLΦ can be obtained as shown in formula (6). In the formula, D ₁ is the duty cycle of the Boost conversion circuit, and D ₂ is the duty cycle of the Buck conversion circuit.

A magnetically coupled resonant wireless energy transmission device based on maximum power load tracking, as shown in FIG. 2 , includes a transmitting device and a receiving device.

The transmitting device includes a high-frequency power supply, an impedance matching network, a detection system and a transmitting coil. The output end of the high-frequency power supply is connected with the input end of the transmitting coil through an impedance matching network. The detection system includes a first detection unit, a transmitting microcontroller and a wireless transmitting module. The input end of the first detection unit is connected to the output end of the high-frequency power supply, the output end of the first detection unit is connected to the transmitting microcontroller, and the output end of the transmitting microcontroller is connected to the input end of the wireless transmitting module.

The receiving device includes a receiving coil, a rectifying and filtering circuit, a cascaded conversion circuit, a control system and a load. The cascaded conversion circuit includes a Boost conversion circuit and a Buck conversion circuit. The output end of the receiving coil is connected to the input end of the Boost transformation circuit through the rectification and filtering circuit; the output end of the Boost transformation circuit is connected to the input end of the Buck transformation circuit; the output end of the Buck transformation circuit is connected to the load. The control system includes a second detection unit, a voltage detection unit, a receiving microcontroller and a wireless receiving module. The input end of the wireless receiving module is wirelessly connected with the output end of the wireless transmitting module, and the output end of the wireless receiving module is connected with the input end of the microcontroller. The input end of the second detection unit is connected with the output end of the rectification filter circuit, the input end of the voltage detection unit is connected with the output end of the Boost conversion circuit, and the output end of the second detection unit and the voltage detection unit are simultaneously connected to receive the input of the microcontroller end. The output terminal of the receiving microcontroller is connected to the control terminals of the Boost conversion circuit and the Buck conversion circuit.

The first detection unit and the second detection unit have the same structure, and both include a voltage detection unit and a current detection unit, as shown in FIG. 3 . The voltage detection unit is composed of a voltage sensor, a voltage signal conditioning circuit and a voltage A/D conversion circuit. The input terminal of the voltage signal conditioning circuit is connected to the voltage sensor, the output terminal of the voltage signal conditioning circuit is connected to the input terminal of the voltage A/D conversion circuit, and the output terminal of the voltage A/D conversion circuit is connected to the corresponding microcontroller. The current detection unit is composed of a current sensor, a current signal conditioning circuit and a current A/D conversion circuit. The input terminal of the current signal conditioning circuit is connected to the current sensor, the output terminal of the current signal conditioning circuit is connected to the input terminal of the current A/D conversion circuit, and the output terminal of the current A/D conversion circuit is connected to the corresponding microcontroller.

The third detection unit is also composed of a voltage sensor, a voltage signal conditioning circuit and a voltage A/D conversion circuit. The input terminal of the voltage signal conditioning circuit is connected to the voltage sensor, the output terminal of the voltage signal conditioning circuit is connected to the input terminal of the voltage A/D conversion circuit, and the output terminal of the voltage A/D conversion circuit is connected to the receiving microcontroller.

In the present invention, the transmitting microcontroller of the detection system is a single chip microcomputer, and the receiving microcontroller of the control system is a digital signal processor (Digital Signal Processor, DSP). The evaluation index adopted by the receiving microcontroller is power power, and the times m and n in the power power can be freely set according to people's requirements. The structure of the transmitting coil and the receiving coil is the same, and both are made of copper wire. The centers of the transmitting coil and the receiving coil are on the same horizontal line to improve power transmission efficiency. The load can be a purely resistive load or a load whose impedance changes due to external conditions, such as a battery or a supercapacitor.

The invention adds a real-time detection and automatic adjustment device to the wireless energy transmission system. When the transmission distance and load change, the transmission performance of the system is detected in real time, and free automatic control and adjustment can be realized according to people's requirements, so as to ensure that the system can realize high-power and high-efficiency transmission. This is of vital significance to give full play to the long-distance advantages of the technology and enhance the practicability of the technology.

The working principle of the present invention is as follows:

The high-frequency power supply of the transmitting device outputs high-frequency AC power, forms a conjugate match through an impedance matching network, maximizes the output power of the high-frequency power supply, and then inputs the power to the transmitting coil. The transmitting coil resonates, creating an alternating electromagnetic field around it. The structural parameters of the receiving coil and the transmitting coil are basically the same, and resonance also occurs, generating an electromagnetic field resonant at the same frequency, forming an energy receiving channel, obtaining coupling resonance energy, and generating an alternating current at the same frequency in the transmitting coil. The energy received by the receiving coil is transformed into a stable direct current through the rectification and filtering circuit, and after being regulated and processed by the control system, the voltage or current suitable for the load power supply is obtained, and the load is supplied with power to realize the wireless transmission of electric energy.

When the system is running, the detection unit of the detection system collects the input voltage and current signal of the system through the voltage sensor and current sensor respectively; the detection unit of the control system collects the input of the cascade conversion circuit through the voltage sensor and current sensor respectively The voltage V _in and the input current signal I _in are used as the output voltage and output current signal of the system, and the above signals are transmitted to the corresponding microcontroller after the signal conditioning and A/D conversion circuits respectively. The microcontroller of the detection device transmits the system input information to the microcontroller of the control system through the wireless transmitting module and the wireless receiving module. The micro-controller of the control system obtains the transmission efficiency and the power of the system through information processing according to the pre-set times of power power.

When the load or distance of the system changes, the microcontroller of the control system outputs a PWM signal with a certain disturbance to adjust the duty cycle D ₁ and D ₂ of the cascaded conversion circuit. By comparing with the power of the system before adjustment, Determine whether the disturbance direction is correct or not. If the disturbance direction is correct, continue to disturb the output signal for adjustment according to the original direction; if the disturbance direction is wrong, perform disturbance adjustment in the opposite direction until the two adjustments before and after ensure that the variation of the power of the system is controlled within the allowable range , then the system will work under the ideal load condition that maximizes the power-efficiency power to achieve optimal load tracking. Before the system works, first set the buffer voltage V _bf at both ends of the buffer capacitor _C2 to be k times the load operating voltage (k is slightly greater than 1 to ensure the safety of the load), and the microprocessor of the control system outputs a PWM signal to adjust the Boost conversion The duty cycle of the circuit ensures that V _bf is greater than V _in ; a voltage detection unit is set at the input end of the Buck conversion circuit to detect V _bf in real time to ensure that the buffer voltage V _bf is always greater than the rated operating voltage V at both ends of the load when the load or distance changes _out , to ensure the effectiveness of the Buck conversion circuit and improve the stability of the system output. The specific working principle of the system is shown in Figure 4. Through the above control and adjustment, the system can transmit both high power and high efficiency when the load or distance changes. The load of the system can be a purely resistive load or a load whose impedance changes due to external conditions, such as a battery or a supercapacitor.

The present invention adopts the control strategy with the efficacy power as the evaluation index and combines the boost conversion circuit and the Buck conversion circuit cascaded conditioning circuit to ensure that when the distance or load changes, the transmission performance of the system can be monitored in real time, and the working of the system The load is adjusted to the ideal load that maximizes the power multiplier, and the output power and transmission efficiency of the system can be freely changed according to people's wishes, and it can not only ensure that the system has a higher output power, but also ensure that the system has a greater transmission efficiency , which overcomes the defect that the traditional control strategy can only guarantee a single optimal output power and transmission efficiency. The utility model has the characteristics of simple structure, easy realization, superior comprehensive performance of the system and the like.

Claims (7)

1. The magnetic coupling resonant type wireless energy transmission method is characterized in that, comprising the steps: The high-frequency power supply outputs high-frequency AC power; the high-frequency AC power passes through the impedance matching network to form a conjugate match, maximize the output power of the high-frequency power supply, and then input the power to the transmitting coil; the transmitting coil resonates and generates AC around it. changing electromagnetic field; The receiving coil resonates, generates an electromagnetic field resonating at the same frequency, forms an energy receiving channel, obtains coupling resonance energy, and then generates an alternating current at the same frequency; the rectifying and filtering circuit converts the energy received by the receiving coil into a stable direct current; cascaded conversion circuit Regulate and process the direct current to obtain a voltage or current suitable for load power supply, supply power to the load, and realize wireless transmission of electric energy; When the system is running, the first detection unit of the detection system collects the input information of the system, that is, the output voltage and output current of the high-frequency power supply, and sends them to the transmitting microcontroller after signal conditioning and A/D conversion, and the transmitting microcontroller passes through The wireless transmitting module sends out the system input information; the wireless receiving module of the control system receives the system input information sent by the wireless transmitting module and sends it to the receiving microcontroller; at the same time, the second detection unit of the control system collects the system output The information, that is, the output voltage and output current of the rectification and filtering circuit, is sent to the receiving microcontroller after signal conditioning and A/D conversion; the third detection unit collects the working voltage of the cascaded conversion circuit, that is, the output voltage of the Boost conversion circuit , and sent to the receiving microcontroller after signal conditioning and A/D conversion; When the load or distance of the system changes, the receiving microcontroller of the control system outputs a PWM signal with a certain disturbance to adjust the duty cycle of the Boost conversion circuit and the duty cycle of the Buck conversion circuit in the cascaded conversion circuit. The power of the system is compared to determine whether the disturbance direction is correct or not; if the disturbance direction is correct, continue to disturb the output signal in the original direction for adjustment; if the disturbance direction is wrong, perform disturbance adjustment in the opposite direction until two times before and after The adjustment of the system ensures that the variation of the power factor of the system is controlled within the allowable range. At this time, the system works under the ideal load condition that maximizes the power factor to achieve optimal load tracking. 2. The magnetically coupled resonant wireless energy transmission device realizing the method of claim 1, comprising a transmitting device and a receiving device, is characterized in that: The above-mentioned transmitting device includes a high-frequency power supply, an impedance matching network, a detection system and a transmitting coil; the detection system includes a first detection unit, a transmitting microcontroller and a wireless transmitting module; The output end of the high-frequency power supply is connected to the input end of the transmitting coil through the impedance matching network; the input end of the first detection unit is connected to the output end of the high-frequency power supply, and the output end of the first detection unit is connected to the transmitting microcontroller, and the transmitting microcontroller The output end of the device is connected to the input end of the wireless transmitting module; The receiving device includes a receiving coil, a rectification filter circuit, a cascade conversion circuit, a control system and a load; the cascade conversion circuit includes a Boost conversion circuit and a Buck conversion circuit; the control system includes a second detection unit, a third detection unit, a receiving micro-controller device and wireless receiver module; The output end of the receiving coil is connected to the input end of the Boost conversion circuit through the rectification and filtering circuit, the output end of the Boost conversion circuit is connected to the input end of the Buck conversion circuit, and the output end of the Buck conversion circuit is connected to the load; the input end of the wireless receiving module is connected to the wireless transmitter The output end of the module is connected wirelessly, the output end of the wireless receiving module is connected to the input end of the receiving microcontroller; the input end of the second detection unit is connected to the output end of the rectification filter circuit, and the input end of the third detection unit is connected to the Boost conversion circuit The output terminals of the second detection unit and the third detection unit are connected to the input terminals of the receiving microcontroller at the same time; the output terminals of the receiving microcontroller are connected to the control terminals of the Boost conversion circuit and the Buck conversion circuit. 3. The magnetic coupling resonant wireless energy transmission device according to claim 2, wherein the first detection unit comprises a first voltage detection unit and a first current detection unit; The first voltage detection unit is made up of a first voltage sensor, a first voltage signal conditioning circuit and a first voltage A/D conversion circuit; the first voltage sensor is arranged at the output end of the high-frequency power supply, and the input end of the first voltage signal conditioning circuit It is connected with the output terminal of the first voltage sensor, the output terminal of the first voltage signal conditioning circuit is connected with the input terminal of the first voltage A/D conversion circuit, and the output terminal of the first voltage A/D conversion circuit is connected with the transmitting microcontroller ; The first current detection unit is made up of the first current sensor, the first current signal conditioning circuit and the first current A/D conversion circuit; the first current sensor is arranged at the output end of the high-frequency power supply, and the input end of the first current signal conditioning circuit Connected to the output terminal of the first current sensor, the output terminal of the first current signal conditioning circuit is connected to the input terminal of the first current A/D conversion circuit, and the output terminal of the first current A/D conversion circuit is connected to the transmitting microcontroller . 4. The magnetic coupling resonant wireless energy transmission device according to claim 2, wherein the second detection unit comprises a second voltage detection unit and a second current detection unit; The second voltage detection unit is made up of a second voltage sensor, a second voltage signal conditioning circuit and a second voltage A/D conversion circuit; the second voltage sensor is arranged at the output end of the rectification filter circuit, and the input end of the second voltage signal conditioning circuit Connected to the output terminal of the second voltage sensor, the output terminal of the second voltage signal conditioning circuit is connected to the input terminal of the second voltage A/D conversion circuit, and the output terminal of the second voltage A/D conversion circuit is connected to the receiving microcontroller ; The second current detection unit is made up of a second current sensor, a second current signal conditioning circuit and a second current A/D conversion circuit; the second current sensor is arranged at the output end of the rectification filter circuit, and at the input end of the second current signal conditioning circuit It is connected with the output terminal of the second current sensor, the output terminal of the second current signal conditioning circuit is connected with the input terminal of the second current A/D conversion circuit, and the output terminal of the second current A/D conversion circuit is connected with the receiving microcontroller . 5. The magnetic coupling resonant wireless energy transmission device according to claim 2, wherein the third detection unit is a third voltage detection unit; The third voltage detection unit is made up of a third voltage sensor, a third voltage signal conditioning circuit and a third voltage A/D conversion circuit; the third voltage sensor is arranged on the output end of the Boost conversion circuit, and the input end of the third voltage signal conditioning circuit Connected to the output terminal of the third voltage sensor, the output terminal of the third voltage signal conditioning circuit is connected to the input terminal of the third voltage A/D conversion circuit, and the output terminal of the third voltage A/D conversion circuit is connected to the receiving microcontroller . 6. The magnetic coupling resonant wireless energy transmission device according to claim 2, wherein the transmitting microcontroller is a single-chip microcomputer, and the receiving controller is a digital signal processor. 7. The magnetic coupling resonant wireless energy transmission device according to claim 2, wherein the structure of the transmitting coil and the receiving coil is the same, and the centers of the two are fixed on the same horizontal line.

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