技术领域technical field
本发明涉及感应耦合电能传输技术，尤其涉及一种基于共享通道的能量信号并行传输系统。The invention relates to an inductively coupled electric energy transmission technology, in particular to an energy signal parallel transmission system based on a shared channel.
背景技术Background technique
感应耦合电能传输(IPT)技术是一种借助耦合磁场，实现电能非接触式传输的新型电能接入技术。因为能量的发射端同能量的接收端没有直接的物理接触，克服了传统电能传输的种种缺陷,使得电能的传输过程具有安全、可靠及灵活性强的特点，受到了越来越多的关注。目前已经在电动汽车、生物医电、家用电器、机器人等领域取得了实际的应用与成功。Inductively coupled power transfer (IPT) technology is a new type of power access technology that realizes non-contact transmission of power by means of coupled magnetic fields. Because there is no direct physical contact between the energy transmitting end and the energy receiving end, it overcomes various defects of traditional electric energy transmission, making the electric energy transmission process safe, reliable and flexible, and has received more and more attention. At present, it has achieved practical application and success in the fields of electric vehicles, biomedical appliances, household appliances, and robots.
传统的IPT技术主要集中在对系统的能量传输等级、效率、电路拓扑以及耦合结构等方面的优化设计。随着多能量发送端、拾取端，能量双向传输等应用需求的出现，需要根据能量发送端及能量接收端的运行状态，进行实时控制；同时，针对传感网络的应用，还需要实现传感器的检测信号的传递，这就需要整个IPT系统具有与能量传输系统并行的信号传输系统。如何实现IPT系统能量发送端和接收端间的稳定、可靠、简便的信号传递也成为实现IPT技术应用推广所亟待解决的问题。Traditional IPT technology mainly focuses on the optimal design of the system's energy transmission level, efficiency, circuit topology, and coupling structure. With the emergence of application requirements such as multi-energy transmitters, pick-up terminals, and energy bidirectional transmission, it is necessary to perform real-time control according to the operating status of energy transmitters and energy receivers; at the same time, for the application of sensor networks, it is also necessary to implement sensor detection. Signal transmission, which requires the entire IPT system to have a signal transmission system parallel to the energy transmission system. How to realize the stable, reliable and simple signal transmission between the energy sending end and the receiving end of the IPT system has also become an urgent problem to be solved for the application and promotion of IPT technology.
目前，针对IPT系统的能量发送端和接收端的通信问题，广泛使用是通过新增信号传输线圈，实现能量和信号的并行传输。虽然一定程度上解决了能量发送端和接收端通信的需求，不过新增的通信接口增加了整个系统的不稳定因素，同时两者之间的相互串扰问题影响了整个系统的性能及鲁棒性。At present, for the communication problem between the energy sending end and the receiving end of the IPT system, it is widely used to realize the parallel transmission of energy and signal by adding a signal transmission coil. Although it solves the communication needs of the energy sending end and the receiving end to a certain extent, the newly added communication interface increases the instability of the entire system, and the mutual crosstalk between the two affects the performance and robustness of the entire system. .
有学者提出在能量传输回路中串接耦合变压器，将高频载波信号耦合到能量回路中，实现数字信号载波的传输。高频信号载波的引入会在能量回路带来谐波干扰，降低能量传输品质，且由于系统能量传输回路谐振补偿电路的存在，信号载波会被削弱难以顺利通过。Some scholars propose to connect a coupling transformer in series in the energy transmission loop to couple the high-frequency carrier signal into the energy loop to realize the transmission of the digital signal carrier. The introduction of high-frequency signal carrier will bring harmonic interference in the energy circuit, reducing the quality of energy transmission, and due to the existence of the resonance compensation circuit of the system energy transmission circuit, the signal carrier will be weakened and difficult to pass through smoothly.
中国专利201410016053.2也公开了一种基于多谐振技术的无线能量和信号同步传输系统，该系统是为了解决现有的能量和信号的同步传输方法的传输能量受幅度调制的影响，不能获得稳定的功率输出的问题。它具有多个谐振点的LC串并联电路作为原/副边谐振匹配电路，使得能量传输和通信分别使用不同的频率，在实现能量和数据同步传输的同时，将二者的相互影响减至最低。但是该系统中的信号传输通道并联在能量耦合机构L和谐振电容C构成的LC谐振补偿电路外，传输的信号必须经过谐振电容，对信号的影响仍然比较严重，同时能量传输时，也会有一部分进入信号传输通道中，随着系统能量传输功率的加大，信号提取线圈承受的电流变大，能量传输对信号解调的干扰增加，影响信号的解调。Chinese patent 201410016053.2 also discloses a wireless energy and signal synchronous transmission system based on multi-resonance technology. This system is to solve the problem that the transmission energy of the existing energy and signal synchronous transmission method is affected by amplitude modulation and cannot obtain stable power. output problem. It has an LC series-parallel circuit with multiple resonance points as the primary/secondary side resonant matching circuit, so that energy transmission and communication use different frequencies, and while realizing synchronous transmission of energy and data, the mutual influence between the two is minimized . However, the signal transmission channel in this system is connected in parallel outside the LC resonant compensation circuit composed of the energy coupling mechanism L and the resonant capacitor C. The transmitted signal must pass through the resonant capacitor, which still has a serious impact on the signal. At the same time, when the energy is transmitted, there will be Part of it enters the signal transmission channel. With the increase of the energy transmission power of the system, the current borne by the signal extraction coil becomes larger, and the interference of energy transmission to signal demodulation increases, which affects the signal demodulation.
发明内容Contents of the invention
针对现有技术的缺陷，本发明提出一种基于共享通道的能量信号并行传输系统，将信号加载和检波回路与能量耦合结构并联，利用LC的带通和带阻特性阻断信号载波进入能量传输回路，并阻断能量传输进入信号传输通道，消除信号载波传输在能量回路的谐波干扰，降低了能量传输对信号传输的影响，在不影响能量传输的基础上，实现信号的双向传输。Aiming at the defects of the prior art, the present invention proposes a parallel energy signal transmission system based on a shared channel, which connects the signal loading and detection circuits in parallel with the energy coupling structure, and uses the band-pass and band-stop characteristics of LC to block the signal carrier from entering the energy transmission loop, and block the energy transmission from entering the signal transmission channel, eliminate the harmonic interference of the signal carrier transmission in the energy loop, reduce the impact of energy transmission on signal transmission, and realize two-way transmission of signals without affecting energy transmission.
为了达到上述目的，本发明所采用的具体技术方案如下：In order to achieve the above object, the concrete technical scheme adopted in the present invention is as follows:
一种基于共享通道的能量信号并行传输系统，包括能量输入装置、原边电能变换装置、能量耦合机构、副边电能变换装置以及负载，所述能量耦合机构由发射线圈Lp和拾取线圈Ls构成，在能量耦合机构与原边电能变换装置之间设置有原边谐振补偿电路，其关键在于：在所述发射线圈Lp的两端并联有原边信号传输通道，在所述拾取线圈Ls的两端并联有副边信号传输通道，所述原边信号传输通道由耦合变压器T1的一个绕组、调谐电容C1以及耦合变压器T3的一个绕组串联而成，所述耦合变压器T1作为原边信号加载电路，其另一个绕组加载向副边发送的信号，所述耦合变压器T3作为原边信号拾取元件，其另一个绕组并联检波电容C3后构成原边检波电路，所述副边信号传输通道由耦合变压器T2的一个绕组、调谐电容C2以及耦合变压器T4的一个绕组串联而成，所述耦合变压器T2作为副边信号加载电路，其另一个绕组加载向原边发送的信号，所述耦合变压器T4作为副边信号拾取元件，其另一个绕组并联检波电容C4后构成副边检波电路，在所述原边电能变换装置与所述原边信号加载电路之间的能量传输通道上串接有原边高频阻波电路，在所述副边电能变换装置与所述副边信号加载电路之间的能量传输通道上串接有副边高频阻波电路。An energy signal parallel transmission system based on a shared channel, including an energy input device, a primary power conversion device, an energy coupling mechanism, a secondary power conversion device and a load, the energy coupling mechanism consists of a transmitting coil Lp and a pickup coil Ls Composition, a primary-side resonant compensation circuit is arranged between the energy coupling mechanism and the primary-side power conversion device, the key of which is: a primary-side signal transmission channel is connected in parallel at both ends of the transmitting coilLp , and a primary-side signal transmission channel is connected in parallel between the pickup coil L The two ends ofs are connected in parallel with a secondary signal transmission channel, and the primary signal transmission channel is formed in series by a windingof a coupling transformer T1,a tuning capacitorC1 and a winding ofa coupling transformer T3, and the coupling transformer T1 As the primary side signal loading circuit, the other winding loads the signal sent to the secondary side, the coupling transformerT3 is used as the primary side signal pickup element, and its other winding is connected in parallel with the detection capacitorC3 to form the primary side detection circuit, soThe secondary side signal transmission channel is formed by a winding of the coupling transformer T2, a tuning capacitorC2 and a winding of the coupling transformer T4 in series.The coupling transformer T2 is used as a secondary side signal loading circuit, and the other winding loads the primary The signal sent by the side, the coupling transformer T4 is used as a secondary side signal pick- up element, and its other winding is connected in parallel with the detection capacitorC4 to form a secondary side detection circuit, and the primary side power conversion device and the primary side signal are loaded The energy transmission channel between the circuits is connected in series with a primary side high-frequency wave blocking circuit, and the energy transmission channel between the secondary side power conversion device and the secondary side signal loading circuit is connected in series with a secondary side high frequency resistance circuit. wave circuit.
作为进一步描述，所述原边高频阻波电路与所述副边高频阻波电路均是由电感、电容并联而成的带阻滤波电路，其中心频率为信号载波频率。As a further description, both the primary-side high-frequency wave blocking circuit and the secondary-side high-frequency wave blocking circuit are band-stop filter circuits formed by parallel connection of inductors and capacitors, and their center frequency is the signal carrier frequency.
再进一步描述，所述原边信号传输通道与副边信号传输通道中的耦合变压器和调谐电容分别构成一个带通滤波电路，其中心频率为信号载波频率。To further describe, the coupling transformers and tuning capacitors in the primary-side signal transmission channel and the secondary-side signal transmission channel respectively constitute a band-pass filter circuit, the center frequency of which is the signal carrier frequency.
为了便于实现的数字信号的调制，所述原边信号加载电路与所述副边信号加载电路分别连接有一个用于加载数字信号的开关键控调制模块，通过开关键控将数字信号调制为载波信号。In order to facilitate the modulation of digital signals, the primary-side signal loading circuit and the secondary-side signal loading circuit are respectively connected with an on-off keying modulation module for loading digital signals, and the digital signal is modulated into a carrier wave through on-off keying Signal.
为了保证能量传输效率，所述原边谐振补偿电路为原边谐振电容。In order to ensure energy transmission efficiency, the primary side resonance compensation circuit is a primary side resonance capacitor.
同理，在能量耦合机构与副边电能变换装置之间设置有副边谐振补偿电路，该副边谐振补偿电路为副边谐振电容。当然，如果能量耦合机构的耦合系数较高，副边谐振电容也可以省略。Similarly, a secondary resonant compensation circuit is provided between the energy coupling mechanism and the secondary electric energy conversion device, and the secondary resonant compensation circuit is a secondary resonant capacitor. Of course, if the coupling coefficient of the energy coupling mechanism is relatively high, the secondary resonance capacitor can also be omitted.
本发明的显著效果是：Notable effect of the present invention is:
本发明提出的一种基于共享通道的能量信号并行传输系统，不需额外增加信号耦合机构，将信号传输通道直接并联在系统已有的能量耦合机构上，中间并没有谐振补偿电容，且在信号传输通道和能量变化装置串联了高频阻波电路，根据高频阻波电路并联谐振的阻抗特性，调节谐振频率等于信号载波频率，这样其特征阻抗对信号载波来说足够大，相当于断路，高频阻波电路可以将信号传输通道中的信号加载电路和信号检波电路同能量传输通道中的谐振电容阻断，信号载波不会再通过谐振电容，而是直接通过耦合机构，不会对信号载波造成衰减作用。其次，信号加载电路和检波电路中，调谐电容和耦合变的一个绕组串联，只需要调节其谐振频率等于信号载波的频率，根据串联谐振的阻抗特性，其特征阻抗在信号载波下极小，信号载波可以顺利通过，而对于能量频率而言，其阻抗却相当大，这样对于能量来说，相当于断路，该支路并不会对能量的传输造成影响，可以真正意义上的实验能量信号的无干扰并行传输。其次当能量的频率在一定范围内发生变化时，其阻抗依旧足够大，可以保证能量的软开关工作模式。The present invention proposes an energy signal parallel transmission system based on a shared channel, without additional signal coupling mechanism, and the signal transmission channel is directly connected in parallel to the existing energy coupling mechanism of the system, there is no resonant compensation capacitor in the middle, and the signal The transmission channel and the energy changing device are connected in series with a high-frequency wave blocking circuit. According to the impedance characteristics of the parallel resonance of the high-frequency wave blocking circuit, the resonance frequency is adjusted to be equal to the signal carrier frequency, so that its characteristic impedance is large enough for the signal carrier, which is equivalent to an open circuit. The high-frequency blocking circuit can block the signal loading circuit and signal detection circuit in the signal transmission channel from the resonant capacitor in the energy transmission channel. The signal carrier will not pass through the resonant capacitor, but directly through the coupling mechanism, which will not affect the signal. Carriers cause attenuation. Secondly, in the signal loading circuit and the detection circuit, the tuning capacitor and a winding of the coupling transformer are connected in series, and only need to adjust its resonant frequency to be equal to the frequency of the signal carrier. According to the impedance characteristics of the series resonance, its characteristic impedance is extremely small under the signal carrier, and the signal The carrier can pass through smoothly, but for the energy frequency, its impedance is quite large, so for the energy, it is equivalent to an open circuit. This branch will not affect the transmission of energy, and it can truly test the energy signal. Interference-free parallel transmission. Secondly, when the frequency of energy changes within a certain range, its impedance is still large enough to ensure the soft switching mode of energy.
附图说明Description of drawings
图1是本发明的电路原理框图；Fig. 1 is a block diagram of circuit principle of the present invention;
图2是传统IPT系统中增加高频阻波电路后的电路原理图；Figure 2 is a circuit schematic diagram after adding a high-frequency blocking circuit in a traditional IPT system;
图3是信号传输通道的电路原理图；Fig. 3 is a circuit schematic diagram of a signal transmission channel;
图4是无信号传输通道时系统能量传输的Bode图；Figure 4 is a Bode diagram of system energy transmission when there is no signal transmission channel;
图5是有信号传输通道时系统能量传输的Bode图；Figure 5 is a Bode diagram of system energy transmission when there is a signal transmission channel;
图6是能量传输对信号正向传输的影响Bode图；Figure 6 is a Bode diagram of the influence of energy transmission on the forward transmission of signals;
图7是能量传输对信号反向传输的影响Bode图；Figure 7 is a Bode diagram of the influence of energy transmission on signal reverse transmission;
图8是信号传输的Bode图；Fig. 8 is a Bode diagram of signal transmission;
图9是数字信号调制效果图；Fig. 9 is a digital signal modulation effect diagram;
图10是信号解调电路的原理框图。Fig. 10 is a functional block diagram of the signal demodulation circuit.
具体实施方式detailed description
下面结合附图对本发明的具体实施方式以及工作原理作进一步详细说明。The specific implementation manner and working principle of the present invention will be further described in detail below in conjunction with the accompanying drawings.
如图1-图3所示，一种基于共享通道的能量信号并行传输系统，包括能量输入装置、原边电能变换装置、能量耦合机构、副边电能变换装置以及负载，所述能量耦合机构由发射线圈Lp和拾取线圈Ls构成，在能量耦合机构与原边电能变换装置之间设置有原边谐振补偿电路，其特征在于：在所述发射线圈Lp的两端并联有原边信号传输通道，在所述拾取线圈Ls的两端并联有副边信号传输通道，所述原边信号传输通道由耦合变压器T1的一个绕组、调谐电容C1以及耦合变压器T3的一个绕组串联而成，所述耦合变压器T1作为原边信号加载电路，其另一个绕组加载向副边发送的信号，所述耦合变压器T3作为原边信号拾取元件，其另一个绕组并联检波电容C3后构成原边检波电路，所述副边信号传输通道由耦合变压器T2的一个绕组、调谐电容C2以及耦合变压器T4的一个绕组串联而成，所述耦合变压器T2作为副边信号加载电路，其另一个绕组加载向原边发送的信号，所述耦合变压器T4作为副边信号拾取元件，其另一个绕组并联检波电容C4后构成副边检波电路，在所述原边电能变换装置与所述原边信号加载电路之间的能量传输通道上串接有原边高频阻波电路，在所述副边电能变换装置与所述副边信号加载电路之间的能量传输通道上串接有副边高频阻波电路。As shown in Figures 1-3, an energy signal parallel transmission system based on a shared channel includes an energy input device, a primary-side power conversion device, an energy coupling mechanism, a secondary-side power conversion device, and a load. The energy coupling mechanism consists of The transmission coilLp and the pick-up coilLs are formed, and a primary side resonant compensation circuit is arranged between the energy coupling mechanism and the primary side power conversion device, and it is characterized in that: a primary side signal is connected in parallel at both ends of the transmission coilLp A transmission channel, a secondary side signal transmission channel is connected in parallel at both ends of the pickup coil Ls , and the primary side signal transmission channel is connected in series by a windingof the coupling transformer T1, a tuning capacitorC1 anda winding of the coupling transformer T3The coupling transformer T1 is used as the primary side signal loading circuit, and its other winding loads the signal sent to the secondary side, and the coupling transformerT3 is used as the primary side signal pickup element, and its other winding is connected in parallel with the detection capacitorC3Afterwards , the primary side detection circuit is formed, and the secondary side signal transmission channel is formed in series by a winding of the coupling transformer T2, a tuning capacitorC2 and a winding of the coupling transformerT4 , and the coupling transformerT2 is used as the secondary side signal Loading circuit, its other winding loads the signal sent to the primary side, the coupling transformer T4 is used as a secondary signal pickup element, and its other winding is connected in parallel with the detection capacitor C4 to form a secondary detection circuit. The energy transmission channel between the conversion device and the primary side signal loading circuit is connected in series with a primary side high frequency wave blocking circuit, and the energy transmission channel between the secondary side power conversion device and the secondary side signal loading circuit A secondary high-frequency wave blocking circuit is connected in series.
通过图3可以看出，所述原边高频阻波电路与所述副边高频阻波电路均是由电感、电容并联而成的带阻滤波电路，其中心频率为信号载波频率，所述原边信号传输通道与副边信号传输通道中的耦合变压器和调谐电容分别构成一个带通滤波电路，其中心频率为信号载波频率，所述原边谐振补偿电路为原边谐振电容，由于能量耦合机构的耦合系数较高，本例中未设置副边谐振电容。As can be seen from Fig. 3, the high-frequency wave blocking circuit of the primary side and the high-frequency wave blocking circuit of the secondary side are all band-stop filter circuits formed by inductance and capacitor connected in parallel, and its center frequency is the signal carrier frequency, so The coupling transformer and tuning capacitor in the primary side signal transmission channel and the secondary side signal transmission channel respectively constitute a bandpass filter circuit, the center frequency of which is the signal carrier frequency, and the primary side resonant compensation circuit is the primary side resonant capacitor, due to energy The coupling coefficient of the coupling mechanism is relatively high, and the secondary resonance capacitor is not set in this example.
为了进一步理解本系统的性能，下面对添加的并联信道对能量传输的影响，以及能量传输过程对信号传输过程的影响进行了分析，具体实施时，结合图2、图3中各个元件的标识，系统参数如表1所示。In order to further understand the performance of this system, the impact of the added parallel channel on energy transmission and the impact of the energy transmission process on the signal transmission process are analyzed below. In the specific implementation, combined with the identification of each component in Figure 2 and Figure 3 , the system parameters are shown in Table 1.
表1系统参数Table 1 System parameters
首先分析信号传输通道的加入对系统能量传输过程的影响，在为加入信号传输通道时，系统结构如图2所示，假设系统逆变输出电压为Vin，系统等效负载为Re，系统负载端电压为Vout，谐振频率为ω，忽略高频阻波电路对系统阻抗的影响，则能量拾取端阻抗为：z2＝jωLs+Rs+Re；First, analyze the influence of the addition of signal transmission channels on the energy transmission process of the system. When adding signal transmission channels, the system structure is shown in Figure 2. Assume that the system inverter output voltage is Vin , and the system equivalent load is Re . The voltage at the load terminal is Vout , the resonant frequency is ω, and the influence of the high-frequency blocking circuit on the system impedance is ignored, then the impedance of the energy pickup terminal is: z2 =jωLs +Rs +Re ;
其反射阻抗为：Its reflection impedance is:
则能量发射端的阻抗为：Then the impedance of the energy transmitting end is:
则能量发射端的电流为：Then the current at the energy transmitter is:
能量拾取端拾取到的电压为：v2＝jωMi1；The voltage picked up by the energy pickup end is: v2 =jωMi1 ;
可以得到系统的负载输出电压为：The load output voltage of the system can be obtained as:
则可得到系统能量输入到负载端的增益为：Then the gain of the system energy input to the load can be obtained as:
当加入并联信道后，能量拾取端的阻抗为：When the parallel channel is added, the impedance of the energy pickup end is:
zs为并联信道的阻抗：zs is the impedance of the parallel channel:
z42为检波在信道的反射阻抗：z42 is the reflection impedance of the detection channel:
由信道的对称，发送端信道阻抗zp'＝zs'，能量拾取端的反射阻抗为z21'，能量发送端的阻抗为：According to the symmetry of the channel, the channel impedance zp '=zs ' at the sending end, the reflection impedance at the energy pickup end is z21 ', and the impedance at the energy sending end is:
则能量发送端的电流为：Then the current at the energy sending end is:
则能量发送端的端电压为：Then the terminal voltage of the energy transmitting terminal is:
则流过能量耦合机构的电流为：Then the current flowing through the energy coupling mechanism is:
可得能量拾取端电压为：v2'＝jωMi1'；The available energy pickup terminal voltage is: v2 '=jωMi1 ';
则负载端的电压为：Then the voltage at the load terminal is:
同样地，可以得到加入信号传输通道后系统能量输入到输出端的增益，得到两种情况下系统能量传输的波特图，分别为图4和图5所示，比较加载并联信道前后能量传输的波特图可知，在低频率段(低于1000kHz)，波特图的趋势及相应频率下的增益、相位几乎一致，可知并联信道对于系统能量传输过程的影响几乎可以忽略。Similarly, the gain of the system energy input to the output after adding the signal transmission channel can be obtained, and the Bode diagrams of the system energy transmission in the two cases are obtained, as shown in Figure 4 and Figure 5, respectively. It can be seen from the special figure that in the low frequency band (below 1000kHz), the trend of the Bode figure and the gain and phase at the corresponding frequency are almost the same. It can be seen that the influence of the parallel channel on the energy transmission process of the system is almost negligible.
接下来我们分析能量传输对信号正向传输的影响，如图3所示，信号正向传输过程由耦合变压器T1注入信号载波，T4从信道中提取信号载波，能量高频谐波可能串入信道，影响信号的解调。这里建立系统逆变输出同信号检波电路输出的关系，确定系统能量传输对信号正向传输的影响。Next, we analyze the impact of energy transmission on the forward transmission of the signal. As shown in Figure3 , during the forward transmission of the signal, the signal carrier is injected into the signal carrier by the coupling transformer T1, and the signal carrier is extracted from the channel by T4. into the channel and affect the demodulation of the signal. Here, the relationship between the system inverter output and the output of the signal detection circuit is established to determine the influence of system energy transmission on the forward transmission of the signal.
能量拾取端电压为v2'＝jωMi1'，则信道的电流为：The voltage at the energy pickup terminal is v2 '=jωMi1 ', then the channel current is:
信号检波的输出电压为：Vout1'＝jωM3is；The output voltage of signal detection is: Vout1 '=jωM3 is ;
则可得到信号检波输出电压Vout1同Vin的波特图如图6所示。Then the Bode diagram of the signal detection output voltage Vout1 and Vin can be obtained as shown in FIG. 6 .
由图6信号检波对能量输入的波特图，信号正向传输时，高频电能到信号接收端检波电路的增益可达到-95.5dB，能量传输过程在信号传输过程的干扰被很大的削弱；即使对于其高次谐波(高于1.48MHz)其增益依旧可以达到-39.3dB，在信号检波电路的干扰极小。选择合适的信号载波，使得信号检波得到的信号载波幅值Vout1大于能量传输在信号载波电路的干扰Vout1’，能量传输对信号正向传输的影响也可以忽略。According to the Bode diagram of signal detection versus energy input in Figure 6, when the signal is transmitted in the forward direction, the gain of the high-frequency power to the detection circuit at the signal receiving end can reach -95.5dB, and the interference during the energy transmission process is greatly weakened during the signal transmission process. ; Even for its higher harmonics (higher than 1.48MHz), its gain can still reach -39.3dB, and the interference in the signal detection circuit is minimal. Select an appropriate signal carrier so that the signal carrier amplitude Vout1 obtained by signal detection is greater than the interference Vout1 ′ of the energy transmission in the signal carrier circuit, and the influence of energy transmission on the forward transmission of the signal can also be ignored.
接下来我们再分析能量传输对信号反向传输的影响，信号反向传输时，干扰主要来自耦合变压器T3耦合到的来自高频电能谐波。由能量发送端的端电压为：可知发送端信道的电流为：Next, we will analyze the impact of energy transmission on the reverse transmission of the signal. When the signal is transmitted in the reverse direction, the interference mainly comes from the high- frequency power harmonics coupled by the coupling transformer T3. The terminal voltage of the energy transmitting terminal is: It can be seen that the current of the channel at the sending end is:
则信号检波电路的端电压为：Vout2'＝jωM3it'；Then the terminal voltage of the signal detection circuit is: Vout2 '=jωM3 it ';
则可得到Vout2’-Vin的波特图，如下图7所示。Then the Bode diagram of Vout2 '-Vin can be obtained, as shown in Figure 7 below.
信号反向传输过程中，高频电能在信号接收电路上的增益可达到-85.7dB，能量传输对信号传输过程的影响被很大的削弱，其高次谐波(高于1.32MHz)的增益也达到-27.1dB，能量传输对系统信号传输的影响也很小。In the process of signal reverse transmission, the gain of high-frequency power on the signal receiving circuit can reach -85.7dB, and the influence of energy transmission on the signal transmission process is greatly weakened, and the gain of its high-order harmonics (higher than 1.32MHz) It also reaches -27.1dB, and the energy transmission has little influence on the signal transmission of the system.
在信号传输过程中，高频阻波电路阻断信号载波进入能量传输回路，能量传输回路对于信号载波相当于短路。信道的对称性，这里只对信号正向传输过程信号载波的衰减情况进行介绍。载波输入为Vin1，检波输出为Vout1，得到其波特图曲线如图8所示。During the signal transmission process, the high-frequency blocking circuit blocks the signal carrier from entering the energy transmission loop, and the energy transmission loop is equivalent to a short circuit for the signal carrier. The symmetry of the channel, here only introduces the attenuation of the signal carrier during the forward transmission of the signal. The carrier input is Vin1 , and the detection output is Vout1 , and the obtained Bode plot curve is shown in FIG. 8 .
通过分析图8可知，信号载波在信道传输过程，增益有三个峰值，频率为1.48MHz时，增益达到5.89dB。结合、能量传输对信号传输影响的波特图，选择合适的信号载波频率，实现信号载波的双向传输，同时能量传输的影响降到最低，实现能量信号的实时同步传输。Through the analysis of Figure 8, it can be seen that the signal carrier has three peaks in the gain during the channel transmission process, and when the frequency is 1.48MHz, the gain reaches 5.89dB. Combined with the Bode diagram of the impact of energy transmission on signal transmission, select the appropriate signal carrier frequency to realize two-way transmission of signal carrier, while minimizing the impact of energy transmission, and realize real-time synchronous transmission of energy signals.
为了更好的实现信号传输，所述原边信号加载电路与所述副边信号加载电路分别连接有一个用于加载数字信号的开关键控调制模块。信号加载采用开关键控OOK(On-Off-Keying)的调制方式，当数字信号为1时，输出连续的载波，当数字信号为0时，关闭载波输出，通过开关电路完成信号的调制，在输出端得到带有数字特征的载波信号，调制过程如图9所示。In order to better realize signal transmission, the primary-side signal loading circuit and the secondary-side signal loading circuit are respectively connected with an on-off keying modulation module for loading digital signals. Signal loading adopts on-off keying OOK (On-Off-Keying) modulation method. When the digital signal is 1, the continuous carrier is output. When the digital signal is 0, the carrier output is turned off, and the signal modulation is completed through the switching circuit. The carrier signal with digital characteristics is obtained at the output end, and the modulation process is shown in Figure 9.
从检波电路得到的带有数字载波和能量谐波的复合载波，经过带通滤波器，选择合适的比较器阈值，得到数字载波信号，经过单稳触发器，复原出数字信号，完成信号的解调，其结构如图10所示。The composite carrier with digital carrier and energy harmonics obtained from the detection circuit passes through a band-pass filter, selects an appropriate threshold of the comparator to obtain a digital carrier signal, and restores the digital signal through a monostable trigger to complete the solution of the signal tune, and its structure is shown in Figure 10.
综上所述，本发明提出的这种共享通道的模式实现IPT系统的能量信号实时同步传输。不需额外增加信号耦合机构，将信号加载和检波电路并联在系统已有的能量耦合机构上，实现了在不影响系统能量传输的前提下，能量的单向传输，信号的半双工双向传输，可通过与耦合线圈并联的信道，实现信号载波注入到耦合线圈，以及从耦合线圈中提取信号载波，能量传输可以工作在软开关模式，降低对信号传输的辐射干扰，同时不会受到信号传输的影响；信号传输的速率最低都能能达到19.2Kbps，且为半双工、双向传输，其误码率完全可以达到低于万分之一的要求，具有很大的应用前景。To sum up, the sharing channel mode proposed by the present invention realizes the real-time synchronous transmission of the energy signal of the IPT system. There is no need to add additional signal coupling mechanisms, and the signal loading and detection circuits are connected in parallel to the existing energy coupling mechanisms of the system, realizing the one-way transmission of energy and the half-duplex bidirectional transmission of signals without affecting the energy transmission of the system , the signal carrier can be injected into the coupling coil through the channel connected in parallel with the coupling coil, and the signal carrier can be extracted from the coupling coil. The energy transmission can work in the soft switching mode, which reduces the radiation interference to the signal transmission and will not be affected by the signal transmission. impact; the minimum rate of signal transmission can reach 19.2Kbps, and it is half-duplex, two-way transmission, and its bit error rate can fully meet the requirements of less than one ten thousandth, which has great application prospects.
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| CN201510361920.0ACN105024738B (en) | 2015-06-26 | 2015-06-26 | Energy signal parallel transmission system based on sharing channel |
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| CN201510361920.0ACN105024738B (en) | 2015-06-26 | 2015-06-26 | Energy signal parallel transmission system based on sharing channel |
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