CN105024738B - Energy signal parallel transmission system based on sharing channel - Google Patents
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Abstract
The present invention discloses a kind of energy signal parallel transmission system based on sharing channel, including energy input devices, primary side electrical energy changer, energy coupling mechanism, secondary electrical energy changer and load, and energy coupling mechanism is by transmitting coil LpWith pick-up winding LsConstitute, it is characterised in that：In transmitting coil LpTwo ends be parallel with primary side signal transmission passage, in pick-up winding LsTwo ends be parallel with secondary side signal transmission channel, primary side high-frequency choke circuit is serially connected with energy-transmission channel between primary side electrical energy changer and primary side signal loading circuit, secondary high-frequency choke circuit is serially connected with the energy-transmission channel between secondary electrical energy changer and secondary side signal loaded circuit.The system does not set up signal coupling mechanism, signal transmission passage is directly parallel in energy coupling mechanism, signal transmission is realized while energy is transmitted using energy coupling mechanism, using high-frenquency current blocking device, it is ensured that the transmission of signal will not be impacted to the energy transmission performance of system.
Description
Technical field
The present invention relates to inductively coupled power transfer technology, more particularly to a kind of energy signal based on sharing channel are parallel
Transmission system.
Background technology
Inductively coupled power transfer (IPT) technology is a kind of by coupled magnetic field, realizes the new of electric energy contactless transmission
Type electric energy access technology.Because the receiving terminal that the transmitting terminal of energy is co-energy is not physically contacted directly, traditional electricity is overcome
The many disadvantages that can be transmitted so that the characteristics of transmitting procedure of electric energy has safe and reliable and strong flexibility, are received increasingly
Many concerns.Achieved at present in fields such as electric automobile, biological doctor's electricity, household electrical appliance, robots actual application with
Success.
Traditional IPT technologies are concentrated mainly on energy grade of transmission, efficiency, circuit topology and coupled structure to system
In terms of optimization design.With multi-energy transmitting terminal, pickup end, the appearance of the application demand such as energy two-way transmission is, it is necessary to root
According to energy transmitting terminal and the running status at energy acceptance end, controlled in real time；Meanwhile, for the application of sensing network, also need
The transmission of the detection signal of sensor is realized, this is accomplished by whole IPT systems with the signal parallel with energy transmission system
Transmission system.How to realize that the stabilization between IPT system capacities transmitting terminal and receiving terminal, reliable, easy signal transmission also turn into
Realize IPT technologies application institute urgent problem to be solved.
At present, for the energy transmitting terminal and the communication issue of receiving terminal of IPT systems, it is widely utilized that by increasing signal newly
Transmission coil, realizes the parallel transmission of energy and signal.Although solving energy transmitting terminal and receiving terminal communication to a certain extent
Demand, but newly-increased communication interface adds the destabilizing factor of whole system, while mutual crosstalk between the two is asked
Topic have impact on the performance and robustness of whole system.
There is scholar to propose to concatenate coupling transformer in energy transmission loop, high-frequency carrier signal is coupled to energy loop
In, realize the transmission of digital signal carrier wave.The introducing of high-frequency signal carrier wave can carry out harmonic wave interference in energy loop band, reduce energy
Transmission quality, and because system capacity transmits the presence of loop resonance compensation circuit, signal carrier, which can be weakened, to be difficult to smoothly lead to
Cross.
Chinese patent 201410016053.2 also discloses that a kind of wireless energy based on multi-resonant technology and signal are synchronous
Transmission system, the system is to solve the transmission energy of the synchronization transfer method of existing energy and signal by amplitude modulation(PAM)
Influence, it is impossible to the problem of obtaining stable power output.It has the LC series-parallel circuits of multiple resonance points humorous as original/secondary
Shake match circuit so that energy is transmitted and communicated uses different frequencies respectively, is realizing the same of energy and data synchronization transmissions
When, influencing each other for the two is reduced to minimum.But the signal transmission passage in the system is connected in parallel on energy coupling mechanism L harmonies
Outside the LC resonance compensation circuits that the electric capacity C that shakes is constituted, the signal of transmission has to pass through resonant capacitance, and the influence to signal is still compared
Seriously, while when energy is transmitted, also having and being partly into signal transmission passage, with adding for system capacity transimission power
Greatly, the electric current that signal extraction coil is born becomes big, the interference increase that energy transmission is demodulated to signal, influences the demodulation of signal.
The content of the invention
For the defect of prior art, the present invention proposes a kind of energy signal parallel transmission system based on sharing channel,
Signal loading and detector circuit is in parallel with energy coupling structure, entered using LC band logical and band-stop response disabling signal carrier wave
Energy transmission loop, and block energy to be transferred into signal transmission passage, eliminate harmonic wave of the signal carrier transmission in energy loop
Interference, reduces influence of the energy transmission to signal transmission, on the basis of not influenceing energy to transmit, realizes the two-way biography of signal
It is defeated.
In order to achieve the above object, concrete technical scheme of the present invention is as follows：
A kind of energy signal parallel transmission system based on sharing channel, including energy input devices, primary side transformation of electrical energy
Device, energy coupling mechanism, secondary electrical energy changer and load, the energy coupling mechanism is by transmitting coil LpAnd pickup
Coil LsConstitute, primary side resonance compensation circuit is provided between energy coupling mechanism and primary side electrical energy changer, it is crucial
It is：In the transmitting coil LpTwo ends be parallel with primary side signal transmission passage, in the pick-up winding LsTwo ends be parallel with
Secondary side signal transmission channel, the primary side signal transmission passage is by coupling transformer T1A winding, tuning capacitance C1And coupling
Close transformer T3A windings in series form, the coupling transformer T1It is used as primary side signal loading circuit, its another winding
Load the signal sent to secondary, the coupling transformer T3It is used as primary side picking up signal element, the inspection of its another winding parallel
Ripple electric capacity C3Primary side detecting circuit is constituted afterwards, and the secondary side signal transmission channel is by coupling transformer T2A winding, tuning electricity
Hold C2And coupling transformer T4A windings in series form, the coupling transformer T2As secondary side signal loaded circuit, its
Another winding loads the signal sent to primary side, the coupling transformer T4As secondary side signal pickup device, its another
Winding parallel detection electric capacity C4Secondary detecting circuit is constituted afterwards, in the primary side electrical energy changer and the primary side signal loading
Primary side high-frequency choke circuit is serially connected with energy-transmission channel between circuit, in the secondary electrical energy changer and the pair
Secondary high-frequency choke circuit is serially connected with energy-transmission channel between the signal loading circuit of side.
As further describing, the primary side high-frequency choke circuit and the secondary high-frequency choke circuit be by inductance,
The rejector circuit that electric capacity is formed in parallel, its centre frequency is signal(-) carrier frequency.
Further describe, the primary side signal transmission passage and the coupling transformer and tune in secondary side signal transmission channel
Humorous electric capacity respectively constitutes a bandwidth-limited circuit, and its centre frequency is signal(-) carrier frequency.
For the ease of the modulation of the data signal of realization, the primary side signal loading circuit loads electricity with the secondary side signal
Road, which is connected to one, to be used to load the ON-OFF keying modulation module of data signal, by on-off keying by digital signal modulated
For carrier signal.
In order to ensure energy transmission efficiency, the primary side resonance compensation circuit is primary side resonant capacitance.
Similarly, secondary resonance compensation circuit, the pair are provided between energy coupling mechanism and secondary electrical energy changer
Side resonance compensation circuit is secondary resonant capacitance.Certainly, if the coefficient of coup of energy coupling mechanism is higher, secondary resonant capacitance
It can also omit.
The present invention remarkable result be：
A kind of energy signal parallel transmission system based on sharing channel proposed by the present invention, is not required to additionally increase signal coupling
Mechanism is closed, signal transmission passage is directly parallel in the existing energy coupling mechanism of system, centre does not have resonance compensation electricity
Hold, and connected high-frequency choke circuit in signal transmission passage and energy variation device, according to high-frequency choke circuit parallel resonance
Impedance operator, regulation resonant frequency is equal to signal(-) carrier frequency, and so its characteristic impedance is sufficiently large for signal carrier, phase
When in open circuit, high-frequency choke circuit can be by the co-energy biography of the signal loading circuit and signal demodulator circuit in signal transmission passage
Resonant capacitance in defeated passage is blocked, and signal carrier will not be again by resonant capacitance, but directly by coupling mechanism, will not be right
Signal carrier causes attenuation.Secondly, in signal loading circuit and detecting circuit, the winding that tuning capacitance and coupling become
Series connection, it is only necessary to the frequency that its resonant frequency is equal to signal carrier is adjusted, according to the impedance operator of series resonance, its characteristic impedance
Minimum under signal carrier, signal carrier can be passed through, and for energy frequency, its impedance is but quite big, so
For energy, equivalent to open circuit, the branch road can't be impacted to the transmission of energy, experiment that can be truly
The noiseless parallel transmission of energy signal.Secondly when the frequency of energy changes within the specific limits, its impedance remains unchanged foot
It is enough big, it is ensured that the Sofe Switch mode of operation of energy.
Brief description of the drawings
Fig. 1 is the schematic block circuit diagram of the present invention；
Fig. 2 is the circuit theory diagrams after increase high-frequency choke circuit in Traditional IP T systems；
Fig. 3 is the circuit theory diagrams of signal transmission passage；
The Bode figures that system capacity is transmitted when Fig. 4 is no signal transmission channel；
Fig. 5 is the Bode figures that system capacity is transmitted when having signal transmission passage；
Fig. 6 is that energy transmission is schemed to the influence Bode of signal forward direction transmission；
Fig. 7 is that energy transmission is schemed to the influence Bode that signals reverse is transmitted；
Fig. 8 is the Bode figures of signal transmission；
Fig. 9 is digital signal modulated design sketch；
Figure 10 is the theory diagram of signal demodulating circuit.
Embodiment
The embodiment and operation principle to the present invention are described in further detail below in conjunction with the accompanying drawings.
As shown in Figure 1-Figure 3, a kind of energy signal parallel transmission system based on sharing channel, including energy input dress
Put, primary side electrical energy changer, energy coupling mechanism, secondary electrical energy changer and load, the energy coupling mechanism by
Transmitting coil LpWith pick-up winding LsConstitute, primary side resonance is provided between energy coupling mechanism and primary side electrical energy changer
Compensation circuit, it is characterised in that：In the transmitting coil LpTwo ends be parallel with primary side signal transmission passage, in the pickup leads
Enclose LsTwo ends be parallel with secondary side signal transmission channel, the primary side signal transmission passage is by coupling transformer T1A winding,
Tuning capacitance C1And coupling transformer T3A windings in series form, the coupling transformer T1It is used as primary side signal loading
Circuit, its another winding loads the signal sent to secondary, the coupling transformer T3As primary side picking up signal element, its
Another winding parallel detection electric capacity C3Primary side detecting circuit is constituted afterwards, and the secondary side signal transmission channel is by coupling transformer T2
A winding, tuning capacitance C2And coupling transformer T4A windings in series form, the coupling transformer T2It is used as pair
Side signal loading circuit, its another winding loads the signal sent to primary side, the coupling transformer T4It is used as secondary side signal
Pickup device, its another winding parallel detection electric capacity C4Secondary detecting circuit is constituted afterwards, in the primary side electrical energy changer
Primary side high-frequency choke circuit is serially connected with energy-transmission channel between the primary side signal loading circuit, in secondary electricity
Secondary high-frequency choke circuit can be serially connected with energy-transmission channel between converting means and the secondary side signal loaded circuit.
As seen in Figure 3, the primary side high-frequency choke circuit and the secondary high-frequency choke circuit be by inductance,
The rejector circuit that electric capacity is formed in parallel, its centre frequency is signal(-) carrier frequency, the primary side signal transmission passage and pair
Coupling transformer and tuning capacitance in the signal transmission passage of side respectively constitute a bandwidth-limited circuit, and its centre frequency is letter
Number carrier frequency, the primary side resonance compensation circuit is primary side resonant capacitance, because the coefficient of coup of energy coupling mechanism is higher,
Secondary resonant capacitance is not provided with this example.
For a further understanding of the performance of the system, the influence transmitted below to the by-pass channel of addition to energy, and
Influence of the energy transport to signals transmission is analyzed, during specific implementation, with reference to each element in Fig. 2, Fig. 3
Mark, systematic parameter is as shown in table 1.
The systematic parameter of table 1
Influence of the addition of signal Analysis transmission channel to system capacity transmitting procedure first, leads to to add signal transmission
During road, system architecture is as illustrated in fig. 2, it is assumed that system inverter output voltage is Vin, system equivalent load is Re, system load end electricity
Press as Vout, resonant frequency is ω, ignores influence of the high-frequency choke circuit to system impedance, then energy pickup terminal impedance is：z2=
jωLs+Rs+Re；
Its reflected umpedance is：
The then impedance of energy transmitting terminal is：
Then the electric current of energy transmitting terminal is：
Energy picks up the voltage picked up at end：v2=j ω Mi1；
The load output voltage that system can be obtained is：
It then can obtain system capacity and be input to the gain of load end and be：
After by-pass channel is added, the impedance at energy pickup end is：
zsFor the impedance of by-pass channel：
z42For detection channel reflected umpedance：
By the symmetrical of channel, transmitting terminal channel impedance zp'=zs', the reflected umpedance at energy pickup end is z21', energy hair
The impedance of sending end is：
Then the electric current of energy transmitting terminal is：
Then the terminal voltage of energy transmitting terminal is：
The electric current for then flowing through energy coupling mechanism is：
Energy pickup terminal voltage, which can be obtained, is：v2'=j ω Mi1'；
Then the voltage of load end is：
Likewise it is possible to obtain adding the gain that system capacity after signal transmission passage is input to output end, two kinds are obtained
In the case of the Bode diagram that transmits of system capacity, shown in respectively Fig. 4 and Fig. 5, compare what energy before and after loading by-pass channel was transmitted
Bode diagram understands, the gain, phase under low frequency section (be less than 1000kHz), the trend and corresponding frequencies of Bode diagram almost one
Cause, it is known that by-pass channel can almost be ignored for the influence of system capacity transmitting procedure.
Next the influence that our analysing energy transmission are transmitted to signal forward direction, as shown in figure 3, signal forward direction transmitting procedure
By coupling transformer T1Injection Signal carrier wave, T4Signal carrier is extracted from channel, energy high-frequency harmonic may seal in channel, shadow
Ring the demodulation of signal.Here relation of the system inversion output with signal demodulator circuit output is set up, system capacity transmission pair is determined
The influence of signal forward direction transmission.
Energy pickup terminal voltage is v2'=j ω Mi1', then the electric current of channel is：
The output voltage of signal demodulator is：Vout1'=j ω M3is；
It then can obtain signal demodulator output voltage Vout1Same VinBode diagram it is as shown in Figure 6.
By Bode diagram of Fig. 6 signal demodulators to energy input, during signal forward direction transmission, high-frequency electrical energy to signal receiving end is examined
The gain of wave circuit can reach -95.5dB, energy transport signals transmission interference by very big weakening；Even if right
In its higher hamonic wave (being higher than 1.48MHz), its gain remains unchanged can reach -39.3dB, minimum in the interference of signal demodulator circuit.
Select suitable signal carrier so that the signal carrier amplitude V that signal demodulator is obtainedout1More than energy transmission in signal carrier electricity
The interference V on roadout1', influence of the energy transmission to signal forward direction transmission can also be ignored.
Next we again analysing energy transmission to signals reverse transmit influence, signals reverse transmit when, interference
Essentially from coupling transformer T3What is be coupled to comes from high-frequency electrical energy harmonic wave.Terminal voltage by energy transmitting terminal is：Understand transmitting terminal channel electric current be：
Then the terminal voltage of signal demodulator circuit is：Vout2'=j ω M3it'；
It then can obtain Vout2’-VinBode diagram, be illustrated in fig. 7 shown below.
In signals reverse transmitting procedure, gain of the high-frequency electrical energy in signal receiving circuit can reach -85.7dB, and energy is passed
The defeated influence to signals transmission by very big weakening, the gain of its higher hamonic wave (being higher than 1.32MHz) also reaches-
27.1dB, energy transmits the influence transmitted to system signal also very little.
In signals transmission, high-frequency choke circuit disabling signal carrier wave enters energy transmission loop, and energy is transmitted back to
Road is for signal carrier equivalent to short circuit.The symmetry of channel, here decay only to the positive transmitting procedure signal carrier of signal
Situation is introduced.Carrier wave input is Vin1, detection is output as Vout1, obtain its Bode diagram curve as shown in Figure 8.
By analysis chart 8, signal carrier is in transmission process, and gain has three peak values, and frequency is 1.48MHz
When, gain reaches 5.89dB.The Bode diagram influenceed with reference to the transmission of, energy on signal transmission, selects suitable signal(-) carrier frequency,
The transmitted in both directions of signal carrier is realized, while the influence of energy transmission is preferably minimized, the real-time synchronization transmission of energy signal is realized.
In order to preferably realize signal transmission, the primary side signal loading circuit is distinguished with the secondary side signal loaded circuit
It is connected with an ON-OFF keying modulation module for being used to load data signal.Signal loading uses on-off keying OOK (On-Off-
Keying modulation system), when data signal is 1, exports continuous carrier wave, when data signal is 0, closes carrier wave defeated
Go out, the modulation of signal is completed by on-off circuit, obtain the carrier signal with numerical characteristic in output end, modulated process is as schemed
Shown in 9.
The complex carrier with digital carrier and energy harmonic wave obtained from detecting circuit, by bandpass filter, selection
Suitable comparator threshold, obtains digital carrier signal, by monostable trigger, restores data signal, completes the solution of signal
Adjust, its structure is as shown in Figure 10.
In summary, the pattern of this sharing channel proposed by the present invention realizes the energy signal real-time synchronization of IPT systems
Transmission.It is not required to additionally increase signal coupling mechanism, signal loading and detecting circuit is connected in parallel on the existing energy coupling machine of system
On structure, realize on the premise of not influenceing system capacity to transmit, the one-way transmission of energy, the half-duplex bidirectional transmission of signal,
It can realize that signal carrier is injected into coupling coil, and the extraction letter from coupling coil by the channel in parallel with coupling coil
Number carrier wave, energy transmission can be operated in sofe switch pattern, the radiation interference to signal transmission be reduced, while will not be by signal
The influence of transmission；The speed of signal transmission is minimum can to reach 19.2Kbps, and is half-duplex, transmitted in both directions, its bit error rate
The requirement less than a ten thousandth is fully achieved, is had great application prospect.
Claims (4)
1. a kind of energy signal parallel transmission system based on sharing channel, including energy input devices, primary side transformation of electrical energy dress
Put, energy coupling mechanism, secondary electrical energy changer and load, the energy coupling mechanism is by transmitting coil LpAnd pickup leads
Enclose LsConstitute, primary side resonance compensation circuit is provided between energy coupling mechanism and primary side electrical energy changer, its feature exists
In：In the transmitting coil LpTwo ends be parallel with primary side signal transmission passage, in the pick-up winding LsTwo ends be parallel with pair
Side signal transmission passage, the primary side signal transmission passage is by coupling transformer T1A winding, tuning capacitance C1And coupling
Transformer T3A windings in series form, the coupling transformer T1As primary side signal loading circuit, its another winding adds
Carry the signal sent to secondary, the coupling transformer T3It is used as primary side picking up signal element, its another winding parallel detection
Electric capacity C3Primary side detecting circuit is constituted afterwards, and the secondary side signal transmission channel is by coupling transformer T2Winding, a tuning capacitance
C2And coupling transformer T4A windings in series form, the coupling transformer T2As secondary side signal loaded circuit, its is another
One winding loads the signal sent to primary side, the coupling transformer T4As secondary side signal pickup device, its another around
Group detection electric capacity C in parallel4Secondary detecting circuit is constituted afterwards, in the primary side electrical energy changer and primary side signal loading electricity
Primary side high-frequency choke circuit is serially connected with energy-transmission channel between road, in the secondary electrical energy changer and the secondary
Secondary high-frequency choke circuit is serially connected with energy-transmission channel between signal loading circuit；
The primary side high-frequency choke circuit is that the band being formed in parallel by inductance, electric capacity hinders filter with the secondary high-frequency choke circuit
Wave circuit, its centre frequency is signal(-) carrier frequency；
The primary side signal transmission passage respectively constitutes one with the coupling transformer and tuning capacitance in secondary side signal transmission channel
Individual bandwidth-limited circuit, its centre frequency is signal(-) carrier frequency.
2. the energy signal parallel transmission system according to claim 1 based on sharing channel, it is characterised in that：The original
Side signal loading circuit is connected to an on-off keying for being used to load data signal with the secondary side signal loaded circuit
Modulation module.
3. the energy signal parallel transmission system according to claim 1 based on sharing channel, it is characterised in that：The original
Side resonance compensation circuit is primary side resonant capacitance.
4. the energy signal parallel transmission system according to claim 3 based on sharing channel, it is characterised in that：In energy
Secondary resonance compensation circuit is provided between coupling mechanism and secondary electrical energy changer, the secondary resonance compensation circuit is secondary
Resonant capacitance.
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| CN105846684B (en) * | 2016-03-23 | 2018-02-23 | 中国矿业大学 | A kind of non-contact electric energy and signal synchronous transmission system and its control method |
| CN105680577B (en) * | 2016-04-12 | 2017-11-21 | 中国矿业大学 | A kind of wide range of power is adjustable radio energy transmission system and its control method |
| CN107592140B (en) * | 2017-07-13 | 2021-05-25 | 重庆大学 | ICPT bidirectional data transmission system based on partial energy coil |
| CN107612347A (en) * | 2017-09-29 | 2018-01-19 | 哈尔滨工业大学 | Wireless energy and data synchronization transmissions system based on bilateral LCC compensation |
| CN107749772B (en) * | 2017-12-04 | 2020-12-11 | 哈尔滨工业大学 | Wireless energy information synchronous transmission system |
| CN108390472B (en) * | 2018-03-09 | 2021-07-16 | 中国矿业大学 | Non-contact energy and signal synchronous transmission system and transmission method |
| CN110571875A (en) * | 2019-10-30 | 2019-12-13 | 广东电网有限责任公司 | Uninterrupted wireless power supply device |
| CN112713666B (en) * | 2021-01-13 | 2023-08-18 | 重庆大学 | Dual-frequency dual-load multi-relay MC-WPT system based on shared energy channel |
| CN112701800B (en) * | 2021-01-19 | 2022-11-01 | 重庆大学 | Shared channel type single-capacitor coupling wireless electric energy and signal parallel transmission system |
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