CN207559699U - A kind of magnetic coupling parallel resonance formula wireless electric energy transmission device - Google Patents

Abstract

The utility model is related to a kind of magnetic coupling parallel resonance formula wireless electric energy transmission devices, and there are three parts to be formed, and 1, power module；2, frequency following inverter circuit module；3, EMR electromagnetic resonance system in parallel.Employ a kind of frequency following high-frequency inverter circuit, the drive signal of the inverter circuit switching tube is generated by circuit itself, without high-frequency signal generation module, and reverse frequency can follow the natural resonance frequency of the LC networks in parallel of output terminal automatically, whole system always works in resonant condition, detuning system is prevented without designing, so as to efficiently solve the problems, such as the frequency-tracking in magnetic coupling resonator system, and whole system is simple in structure, and cost is relatively low.

Description

A kind of magnetic coupling parallel resonance formula wireless electric energy transmission device

Technical field

The invention belongs to wireless power transmission technical fields, are related to a kind of magnetic coupling parallel resonance formula wireless power transmission dress It puts, and in particular to a kind of magnetic coupling parallel resonance formula wireless electric energy transmission device based on frequency following high-frequency inverter circuit is set Meter.

Background technology

Radio energy transmission system does not need to can be carried out electric energy transmission by medium of cable, has obtained recent years Quick development.Three kinds of radio energy transmission systems of mainstream are induction, microwave type and magnetic coupling in society at present Resonant mode.Wherein magnet coupled resonant type long transmission distance, transimission power and efficiency are all higher, have started research boom in recent years. Magnet coupled resonant type is that covibration is applied on the basis of electromagnetic induction principle, so as to realize longer-distance power Transmission, generally higher than 30cm, and have good penetrability, energy only transmits in resonator system, to the object except resonator system Body is without influence.The magnet coupled resonant type wireless power transfer mentality of designing in society is at present:A high frequency is designed first AC power, the mode that design bridge inverter main circuit may be used either obtain high frequency to high frequency small-signal progress power amplification AC power, then redesigns Electro-magnetic Launcher System and electromagnetism receives system, controls the frequency of high-frequency ac power, Electromagnetic Launching The resonant frequency three that system resonance frequencies receive system with electromagnetism is identical, while is the stability of guarantee system, also to design Frequency servo system, the resonant frequency of moment detection EMR electromagnetic resonance system make the frequency of high frequency electric source and EMR electromagnetic resonance system Resonant frequency, prevent detuning.The design of radio energy transmission system, but whole device can be realized according to more than design procedure There are many component, system complex, larger, and design cost is high.Wherein anti-detuning system, the design of closed loop frequency tracking system, Difficulty is larger, and system job stability is difficult to ensure that, and many magnet coupled resonant type wireless electric energy transmission systems are designed to more Serial-resonant, it is rare to use parallel resonance.

Invention content

Technical problems to be solved

In order to avoid the shortcomings of the prior art, the present invention proposes a kind of magnetic coupling parallel resonance formula wireless power transmission Device.

Technical solution

A kind of magnetic coupling parallel resonance formula wireless electric energy transmission device, it is characterised in that including power module, frequency following Inverter circuit module and EMR electromagnetic resonance system in parallel；The frequency following inverter circuit module includes two identical MOS pipes Q1 And Q2, inductive choke coil RFC1 and RFC2, clamp diode D₃And D₄, biasing resistor R₁, R₂, R₃And R₄；The parallel connection electromagnetism is humorous Vibrating system includes L1, C1 and L2, C2；Specifically connection relation is：Both ends of power four series circuits of parallel connection：R₁With R₂Series connection, R₃With R₄Series connection, RFC1 connect with metal-oxide-semiconductor Q1, and RFC2 connects with metal-oxide-semiconductor Q2, D₁For the parasitic diode of metal-oxide-semiconductor Q1, D₂For metal-oxide-semiconductor The parasitic diode of Q2；The gate pole and R of metal-oxide-semiconductor Q1₁With R₂The midpoint connection of series circuit, the gate pole and R of metal-oxide-semiconductor Q2₃With R₄ The midpoint connection of series circuit, clamp diode D₃Drain electrode with metal-oxide-semiconductor Q2 is connect, clamp diode D₄With the leakage of MOS pipes Q1 Pole connects, and L1 inductance is connect with after C1 capacitance parallel connections with the drain electrode of metal-oxide-semiconductor Q1 and the drain electrode of metal-oxide-semiconductor Q2, L2 inductance and C2 capacitances It is connected after parallel connection with load；The D₁And D₂Parasitic diode for metal-oxide-semiconductor Q1 and Q2；The diode D₃And D₄Using identical Diode；The high-frequency inductor choke coil RFC₁And RFC₂Using identical high-frequency inductor choke coil；The R₂With R₄Resistance value It is identical；The L1 inductance is identical with L2 inductance inductance value；The C1 capacitances are identical with C2 capacitor's capacities.

Described two identical metal-oxide-semiconductor Q1 and Q2 use silicon carbide switches pipe C2M0040120D.

The diode D₃And D₄Using diode 1N4148.

The C1 capacitances and C2 capacitances use identical CBB electric capacity.

The R₁With R₃Resistance value be all mutually 200 ohm.

Advantageous effect

A kind of magnetic coupling parallel resonance formula wireless electric energy transmission device proposed by the present invention, there are three parts to be formed, and 1, electricity Source module；2, frequency following inverter circuit module；3, EMR electromagnetic resonance system in parallel.Employ a kind of frequency following high-frequency inversion electricity Road, the drive signal of the inverter circuit switching tube are generated by circuit itself, without high-frequency signal generation module, and reverse frequency The natural resonance frequency of the LC networks in parallel of output terminal can be followed automatically, and whole system always works in resonant condition, without setting Meter prevents detuning system, so as to efficiently solve the problems, such as the frequency-tracking in magnetic coupling resonator system, and whole system structure Simply, cost is relatively low.

1, do not need to closed loop frequency control.Magnet coupled resonant type wireless electric energy transmission system common at present, it is typically sharp The high-frequency alternating current of a high intensity light source generation certain frequency is designed with high-frequency inverter circuit, makes the frequency of high-frequency alternating current The resonant frequency that system is received with Electro-magnetic Launcher System resonant frequency and electromagnetism is identical, but also want design frequency detection device with Closed loop frequency control system makes the signal source frequency moment follow EMR electromagnetic resonance system frequency, prevents detuning, apparatus structure complexity, Of high cost, volume is big.The present invention high-frequency inverter circuit generate high-frequency ac power frequency always with Electro-magnetic Launcher System Resonant frequency is identical, does not need to design frequency closed-loop control system, and circuit structure is very simple.

2, it does not need to generate high-frequency signal generation device.Either bridge type inverting power supply or E power-like amplifiers all needs One or more high-frequency signal is generated to control turning on and off for switching tube, the drive signal of switching tube of the invention is by electricity Road generates in itself, without outer signal source, reduces circuit cost, reduces structure complexity.

3, circuit structure is simple, at low cost.

Description of the drawings

Fig. 1：Radio energy transmission system structure chart；

Fig. 2：Radio energy transmission system physical circuit design drawing figure；

Fig. 3：Wireless power transmission equivalent topologies figure.

Specific embodiment

In conjunction with embodiment, attached drawing, the invention will be further described：

Part is formed there are three the present invention is main, and 1, power module；2, frequency following inverter circuit module；3, electromagnetism in parallel Resonator system.Overall system architecture figure is referring to attached drawing 1, and the magnetic coupling parallel resonance formula wireless electric energy transmission device is mainly by power supply Module, inverter circuit module and EMR electromagnetic resonance system composition in parallel.Attached drawing 2 be the present invention physical circuit design, system it is each Partial corresponding circuits can be found in attached drawing 2.

External input 24V direct currents are the power power-supplies of the present invention.

Frequency following inverter topology such as Fig. 2, the high-frequency inverter circuit are powered by external dc power, using two phases Same metal-oxide-semiconductor Q₁And Q₂, RFC₁And RFC₂It is inductive choke coil, is equivalent to constant-current source.Metal-oxide-semiconductor structure is variant, simultaneously as two Pole pipe D₃, D₄Clamping action, make the two metal-oxide-semiconductors can not possibly and meanwhile it is open-minded, can be only under complementary duty state, with for the moment It inscribes, one is in opening state, then another is off state, D₁, D₂It is the parasitic diode of metal-oxide-semiconductor.Do not consider first Electromagnetism receives system, works as Q₁Manage open-minded, Q₂When pipe turns off, D at this time₃Shutdown, D₄It is open-minded, RFC₂To L₁, C₁Series resonant network is filled Electricity, L₁, C₁Resonance occurs, works as C₁Both end voltage U_C1By positive voltage first increases and then decreases when resonance is zero or is lower, diode D₃It is open-minded, by Q₁Gate potentials drag down, Q₁It turns off, therewith diode D₄It is also switched off, Q₂Gate potentials increase, Q₂It is open-minded, RFC₁ Start L₁, C₁Series resonant network reverse charging, at this time C₁Both end voltage U_C1It is negative, works as U_C1By negative voltage, resonance is 0V again When, diode D₄It is open-minded, diode D₃Shutdown, makes Q₂Shutdown, Q₁It is open-minded, complete a harmonic period.According to the above-mentioned course of work It is found that the reverse frequency of the circuit depends on L₁, C₁The resonant frequency of resonant network, and follow matching Electro-magnetic Launcher System automatically Intrinsic frequency, it is only necessary to the resonant frequency for making reception system is consistent with the resonant frequency of emission system, and system can generate humorous It shakes.

EMR electromagnetic resonance system in parallel is referring to Fig. 2, mainly by L₁, C₁And L₂, C₂Series resonant network is formed, power power-supply mould Block and frequency following inverter circuit module can be equivalent to ac current source, and system can be equivalent into attached drawing 3 at this time, the I in attached drawing 3_s It is made of the power power-supply module in attached drawing 2 and frequency following inverter circuit module.

In specific embodiment：

Power module is mainly the driving power source of the present invention, and external input 24V DC power supplies are the power electricity of the present invention Source.

In frequency following inverter circuit, the requirement of selecting switch pipe is the working frequency according to radio energy transmission system, Here metal-oxide-semiconductor uses silicon carbide switches pipe C2M0040120D, D₃And D₄Using diode 1N4148, RFC₁And RFC₂It is identical High-frequency inductor choke coil, L₁And L₂It is identical inductive emitter coil, C₁, C₂Using the CBB electric capacity of identical capacitance, R₁With R₃Resistance Value is all mutually 200 ohm, R₂With R₄Resistance value is all mutually 2000 ohm.Specific implementation process is as follows：

After power supply electrifying, Q₁, Q₂Circuit structure it is full symmetric, but because of Q₁, Q₂Chip differences, two switching tubes can not It can simultaneously turn on.Assuming that Q₁Manage open-minded, Q₂When pipe turns off, D at this time₃Shutdown, D₄It is open-minded, RFC₂To L₁, C₁Series resonant network is filled Electricity, L₁, C₁Resonance occurs, works as C₁When both end voltage resonance is zero or is lower, diode D3 is open-minded, by Q₁Gate potentials drag down, Q₁It turns off, therewith diode D₄It is also switched off, Q₂Gate potentials increase, Q₂It is open-minded, RFC₁Start L₁, C₁Series resonant network is reversely filled Electricity, at this time C₁Both end voltage U_C1It is negative, works as U_C1When resonance is 0V again, diode D₄Open-minded, diode D3 shutdowns make Q₂It closes It is disconnected, Q₁It is open-minded, complete a work period.

Circuit stability work when, Electro-magnetic Launcher System both end voltage be high-frequency ac voltage, alternating current voltage frequency C₁With L₁Parallel resonance frequency,Realize frequency following, electric energy transmission process as shown in figure 3, the present invention Power power-supply and inverter circuit can be equivalent into a high-frequency ac current source, and high-frequency ac power follows transmitting and receives system automatically The resonant frequency of system makes transmitting coil L₁With C₁Resonance, transmitting coil L₂With C₂Resonance, the magnetic field generated between coil is most strong, leads to Magnetic coupling effect is crossed, energy is transmitted to receiving terminal from transmitting terminal.

Claims (5)

1. a kind of magnetic coupling parallel resonance formula wireless electric energy transmission device, it is characterised in that inverse including power module, frequency following Become circuit module and EMR electromagnetic resonance system in parallel；The frequency following inverter circuit module include two identical metal-oxide-semiconductor Q1 and Q2, inductive choke coil RFC1 and RFC2, clamp diode D₃And D₄, biasing resistor R₁, R₂, R₃And R₄；The parallel connection EMR electromagnetic resonance System includes inductance L1, capacitance C1 and inductance L2, capacitance C2；Specifically connection relation is：Both ends of power four series circuits of parallel connection： R₁With R₂Series connection, R₃With R₄Series connection, RFC1 connect with metal-oxide-semiconductor Q1, and RFC2 connects with metal-oxide-semiconductor Q2, D₁Two pole of parasitism for metal-oxide-semiconductor Q1 Pipe, D₂Parasitic diode for metal-oxide-semiconductor Q2；The gate pole and R of metal-oxide-semiconductor Q1₁With R₂The midpoint connection of series circuit, the door of metal-oxide-semiconductor Q2 Pole and R₃With R₄The midpoint connection of series circuit, clamp diode D₃Drain electrode with metal-oxide-semiconductor Q2 is connect, clamp diode D₄With MOS The drain electrode connection of pipe Q1, inductance L1 are connect with after capacitance C1 parallel connections with the drain electrode of metal-oxide-semiconductor Q1 and the drain electrode of metal-oxide-semiconductor Q2, inductance L2 It is connected after in parallel with capacitance C2 with load；The D₁And D₂Parasitic diode for metal-oxide-semiconductor Q1 and Q2；The diode D₃And D₄ Using identical diode；The inductive choke coil RFC₁And RFC₂Using identical high-frequency inductor choke coil；The R₂With R₄Resistance It is worth identical；The inductance L1 is identical with inductance L2 inductance value；The capacitance C1 is identical with capacitance C2 capacitances.

2. magnetic coupling parallel resonance formula wireless electric energy transmission device according to claim 1, it is characterised in that：Described two phases Same metal-oxide-semiconductor Q1 and Q2 uses silicon carbide switches pipe C2M0040120D.

3. magnetic coupling parallel resonance formula wireless electric energy transmission device according to claim 1, it is characterised in that：The diode D₃And D₄Using diode 1N4148.

4. magnetic coupling parallel resonance formula wireless electric energy transmission device according to claim 1, it is characterised in that：The capacitance C1 Identical CBB electric capacity is used with capacitance C2.

5. magnetic coupling parallel resonance formula wireless electric energy transmission device according to claim 4, it is characterised in that：The resistance R₁ With resistance R₃Resistance value be all mutually 200 ohm.