CN103219807B - Self-adapting wireless electric energy transmission device - Google Patents

Abstract

The invention discloses an adaptive wireless power transmission device, which belongs to the technical field of wireless power transmission; the wireless power transmission device includes a transmitter, a receiver, a transmitting LC resonator, a relay LC resonator and a receiving LC resonator; The transmitter includes a transmitting coil, a microcontroller, an electronically controlled oscillator, a power amplifier and an impedance converter; the receiver includes a receiving coil, an impedance converter, a rectifier bridge and an output terminal; the transmitting LC resonator, the relay LC The resonant oscillator and the receiving LC resonant oscillator have the same structure, including a resonant coil, a frequency band electronic switch, a resonant capacitor and a control circuit; the self-adaptive wireless power transmission device has a simple structure and can automatically adjust the transmission frequency and resonance according to the electromagnetic frequency in the environment Frequency, with high transmission stability, and can include multiple relay resonators to achieve the purpose of long-distance transmission.

Description

An adaptive wireless power transmission device

technical field

The invention belongs to the technical field of wireless power transmission, and relates to an adaptive wireless power transmission device.

Background technique

Current electrical equipment generally uses wires to obtain electrical energy, but this will cause constraints on electrical equipment, especially for some mobile electrical equipment such as mobile phones, tablet computers, wireless sensors, etc., which will bring a lot of inconvenience.

Wireless power supply is an effective way to solve this problem. At present, some wireless power supply devices have also appeared on the market, but these wireless power supply devices have short power supply distance and low efficiency, so it is difficult to meet the demand for power supply equipment in actual production and life. For example, the patent "wireless power supply device" (patent number: 101345438) only converts electrical energy into electromagnetic waves and sends them into space, and then is coupled and received by the receiving coil. Although this method can improve efficiency, the resonant frequency of the coil will change dynamically with changes in environmental factors (such as temperature, location, medium), and changes in the resonant frequency will greatly reduce the transmission efficiency of the "wireless power supply device".

Contents of the invention

In view of this, the purpose of the present invention is to provide an adaptive wireless power transmission device, which transmits the electric energy in the DC power supply in the form of electromagnetic waves, has stable transmission efficiency, and is suitable for long-distance transmission.

To achieve the above object, the present invention provides the following technical solutions:

An adaptive wireless power transmission device is characterized in that: it includes a transmitter, a receiver, a transmitting LC resonator, a relay LC resonator and a receiving LC resonator; the transmitter includes a transmitting coil, a microcontroller, an electric control Oscillator, power amplifier and impedance converter; The receiver includes a receiving coil, an impedance converter, a rectifier bridge and an output terminal; The transmitting LC resonant oscillator, the relay LC resonant oscillator and the receiving LC resonant oscillator are used to oscillate according to the emission The frequency adaptively adjusts the LC resonant frequency. The above-mentioned resonant oscillators have the same structure, including a resonant coil, a frequency band electronic switch, a resonant capacitor and a control circuit. The control circuit detects the electromagnetic oscillation in the space, thereby determining the resonant frequency. According to the resonant frequency Control the electronic switch of the corresponding frequency band, and select resonant capacitors with different capacitances to connect to the circuit.

The DC power supply supplies power to the transmitter, the microcontroller in the transmitter generates a control signal, and the control signal controls the electronically controlled oscillator to generate an oscillating electrical signal of a certain frequency. The oscillating electrical signal is amplified by the power amplifier and then enters the impedance converter for boosting. The signal from the impedance converter is loaded into the transmitting coil, and the transmitting coil converts the AC energy into electromagnetic energy and emits it outward; the electromagnetic energy emitted through the transmitting coil passes through the transmitting LC resonator, the relay LC resonator and the receiving The LC resonator is coupled and resonated and transmitted to the receiver. The receiving coil in the receiver converts the received electromagnetic energy into AC power. The AC power enters the rectifier bridge after being stepped down by the impedance converter and is converted into DC power. Output terminal output.

Further, the transmitter also includes a detection coil, which is used to check the electromagnetic frequency in the current surrounding environment. When the detection coil detects that the current transmission frequency conflicts with the electromagnetic frequency in the surrounding environment, the microcontroller uses frequency hopping technology to automatically switch the resonance frequency to ensure that the transmission device is not affected by the surrounding environment.

Further, the transmitting LC resonator, the relaying LC resonator and the receiving LC resonator also include a resonant frequency fine-tuning capacitor, and the resonant frequency fine-tuning capacitor is used to adjust the resonant frequency when the frequency fluctuation range is small.

Further, the receiver also includes a DC voltage regulator, which is used to adjust the output DC voltage.

Further, the transmitter and the transmitting LC resonator are assembled in one body, and the receiver and the receiving LC resonator are assembled in one body, so that the resonance strength as large as possible can be obtained.

Further, the number of the relay LC resonators is two or more. When the transmission distance is long, multiple relay LC resonators are used to realize long-distance wireless power transmission.

The beneficial effect of the present invention is that: the adaptive wireless power transmission device described in the present invention has a simple structure, can automatically adjust the transmission frequency and resonance frequency according to the electromagnetic frequency in the environment, has high transmission stability, and can include multiple Inheriting the harmonic oscillator to achieve the purpose of long-distance transmission.

Description of drawings

In order to make the purpose, technical scheme and beneficial effect of the present invention clearer, the present invention provides the following drawings for illustration:

Fig. 1 is the structural representation of this device;

Fig. 2 is the structural representation of transmitter;

Fig. 3 is a structural schematic diagram of the receiver;

FIG. 4 is a schematic structural diagram of an LC resonator.

Detailed ways

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in the drawings, the device includes a transmitter 1, a receiver 2, a transmitting LC resonator 3, a relay LC resonator 4 and a receiving LC resonator 5; the transmitter 1 includes a transmitting coil 12, a microcontroller 13 , an electronically controlled oscillator 14, a power amplifier 15 and an impedance converter 16; the receiver 2 includes a receiving coil 21, an impedance converter 22, a rectifier bridge 23 and an output terminal 25; the transmitting LC resonator 3, the relay LC The resonant oscillator 4 and the receiving LC resonant oscillator 5 are used to adaptively adjust the LC resonant frequency according to the transmitting oscillation frequency. The above-mentioned resonant oscillators have the same structure, including a resonant coil 41, a frequency band electronic switch 42, a resonant capacitor 43 and a control circuit 45. Control The circuit 45 detects the electromagnetic oscillation in the space to determine the resonant frequency, controls the corresponding frequency band electronic switch 42 according to the resonant frequency, and selects the resonant capacitor 43 with different capacitance to connect to the circuit.

The DC power supply supplies power to the transmitter 1, the microcontroller 13 in the transmitter 1 generates a control signal, and the control signal controls the electronically controlled oscillator 14 to generate an oscillating electrical signal of a certain frequency, and the oscillating electrical signal enters impedance transformation after being amplified by the power amplifier 15 The voltage converter 16 boosts the voltage, and the signal from the impedance converter 16 is loaded into the transmitting coil 12, and the transmitting coil 12 converts the alternating current energy into electromagnetic energy and emits it outward; the electromagnetic energy emitted outward through the transmitting coil 12 passes through the transmitting LC The resonator 3, the relay LC resonator 4 and the receiving LC resonator 5 are coupled and resonated and transmitted to the receiver 2. The receiving coil 21 in the receiver 2 converts the received electromagnetic energy into AC power, and the AC power passes through the impedance After the converter 22 steps down the voltage, it enters the rectifier bridge 23 to be converted into DC power, and is output through the output terminal 25 . In this embodiment, the receiver 2 further includes a DC voltage regulator 24 for adjusting the output DC voltage.

As an improvement, the transmitter 1 also includes a detection coil 11, which is used to check the electromagnetic frequency in the current surrounding environment. When the detection coil 11 detects that the current transmission frequency conflicts with the electromagnetic frequency in the surrounding environment, the microcontroller 13 uses frequency hopping technology to automatically switch the resonant frequency to ensure that the transmission device is not affected by the surrounding environment.

As another improvement, the transmitting LC resonator 3, the relay LC resonator 4 and the receiving LC resonator 5 also include a resonant frequency trimming capacitor 44, which is used to adjust the resonant frequency when the frequency fluctuation range is small. Make adjustments.

As a further improvement, the transmitter 1 and the transmitting LC resonator 3 are assembled together, and the receiver 2 and the receiving LC resonator 5 are assembled together, so that the resonance strength as large as possible can be obtained.

As shown in Figure 4, the transmitting LC resonator 3, the receiving LC resonator 5, and the relay LC resonator 4 have the same structure, and the functions of the transmitting LC resonator 3, receiving LC resonator 5, and relaying LC resonator 4 are Adjust the resonant frequency of the LC resonator to be consistent with the emitted electromagnetic oscillation frequency, so that the LC circuit is in a resonant state. When the transmitting, receiving, and relaying LC resonators reach full resonance, a strong magnetic oscillation will be formed around the coil to form a magnetic Coupling the resonant energy transmission channel to transmit energy to the receiver 2 . The working process is as follows: the control circuit detects the electromagnetic oscillation in the space, thereby determining the electromagnetic oscillation frequency of emission, and controls the corresponding channel electronic switch according to the emission electromagnetic oscillation frequency, and selects resonant capacitors with different capacitances to be connected to the loop. The frequency fluctuation of the resonant frequency is adjusted by adjusting the resonant trimmer capacitor.

In addition, when the adaptive wireless power transmission device is applied to short-distance wireless power supply, the relay LC resonator can be omitted. If long-distance wireless power supply is required, one or more relay LC resonators can be added.

Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that it can be described in terms of form and Various changes may be made in the details without departing from the scope of the invention defined by the claims.

Claims (4)

1. an adaptive wireless electric energy transmitting device, is characterized in that: comprise reflector (1), receiver (2), transmitting LC harmonic oscillator (3), relaying LC harmonic oscillator (4) and receive LC harmonic oscillator (5);

Described reflector (1) comprises transmitting coil (12), microcontroller (13), voltage controlled oscillator (14), power amplifier (15) and impedance transformer (16);

Described receiver (2) comprises receiving coil (21), impedance transformer (22), rectifier bridge (23) and lead-out terminal (25);

Described transmitting LC harmonic oscillator (3), relaying LC harmonic oscillator (4) and receive LC harmonic oscillator (5) for according to transmitting frequency of oscillation self-adaptative adjustment LC resonance frequency, above-mentioned harmonic oscillator has identical structure, comprise resonance coil (41) respectively, frequency range electronic switch (42), resonant capacitance (43) and control circuit (45), electromagnetic viscosimeter in control circuit (45) detecting space, determine resonance frequency thus, corresponding frequency range electronic switch (42) is controlled according to resonance frequency, select resonant capacitance (43) the access loop of different capacitance,

DC power supply is powered to reflector (1), microcontroller (13) in reflector (1) produces control signal, control signal controls the electric oscillation signal that voltage controlled oscillator (14) produces certain frequency, this electric oscillation signal is amplified into impedance transformer (16) through power amplifier (15) and boosts, be loaded into transmitting coil (12) from impedance transformer (16) signal out, AC energy is converted to electromagnetic energy and outwards launches by transmitting coil (12); The electromagnetic energy of outwards launching through transmitting coil (12) is transferred into receiver (2) after launching LC harmonic oscillator (3), relaying LC harmonic oscillator (4) and reception LC harmonic oscillator (5) coupled resonance, receiving coil (21) in receiver (2) is converted to AC energy the electromagnetic energy received, this AC energy enters rectifier bridge (23) and is converted into direct current energy after impedance transformer (22) step-down, and is exported by lead-out terminal (25);

Reflector (1) also comprises detecting coil (11), and this detecting coil (11) is for checking the electromagnetic frequency in current ambient environmental;

Launch LC harmonic oscillator (3), relaying LC harmonic oscillator (4) and receive in LC harmonic oscillator (5) and also comprise resonance frequency trimmer (44), this resonance frequency trimmer (44) is for adjusting resonance frequency when frequency fluctuation scope is less.

2. adaptive wireless electric energy transmitting device according to claim 1, it is characterized in that: receiver (2) also comprises direct current stabilizer (24), this direct current stabilizer (24) is for adjusting the direct voltage of output.

3. adaptive wireless electric energy transmitting device according to claim 2, it is characterized in that: described reflector (1) and transmitting LC harmonic oscillator (3) are assemblied in one, described receiver (2) and reception LC harmonic oscillator (5) are assemblied in one.

4. adaptive wireless electric energy transmitting device according to claim 3, is characterized in that: the number of described relaying LC harmonic oscillator (4) be two and more than.