技术领域technical field
本实用新型属于电器件领域，尤其涉及一种多频工作的无线电能传输发射端电路。The utility model belongs to the field of electric devices, in particular to a multi-frequency working wireless energy transmission transmitter circuit.
背景技术Background technique
近场磁耦合式无线电能传输技术(Wireless Power Transfer，WPT)是一种新兴的电能传输技术，其利用耦合线圈间的电磁感应实现电能的无线传输。相比于传统的有线电能传输，无线电能传输技术具有安全、可靠、便捷、环境适应性强等优点。近场磁耦合式无线电能传输系统的结构如图1所示，其系统主要包含发射端的高频逆变器、耦合线圈及其补偿网络、接收端的整流调压电路等。Near-field magnetic coupling wireless power transfer technology (Wireless Power Transfer, WPT) is an emerging power transfer technology, which uses electromagnetic induction between coupling coils to realize wireless power transmission. Compared with traditional wired power transmission, wireless power transmission technology has the advantages of safety, reliability, convenience, and strong environmental adaptability. The structure of the near-field magnetically coupled wireless power transfer system is shown in Figure 1. The system mainly includes a high-frequency inverter at the transmitting end, a coupling coil and its compensation network, and a rectifying and voltage-regulating circuit at the receiving end.
近年来，随着电力电子技术的发展，该技术受到了越来越多的研究与应用。在现有的近场磁耦合式无线电能传输系统中，其发射端通常工作在一个频率附近。对于WPT系统，较低的工作频率有助于降低其发射端逆变器以及线路的损耗，但是其传输距离很短。另一方面，为了提高电能无线传输的距离，往往需要提高WPT系统的设计工作频率。根据法拉弟电磁感应定律，更高的工作频率有助于在耦合线圈互感较低的情况下提高感应电压。低频与高频的WPT系统具有其对应的应用场景。低频短距离的传输模式适合于如笔记本电脑等充电距离较近的应用，而高频中距离的传输模式则可用于智能手机等无线充电器与终端距离稍远的应用。In recent years, with the development of power electronics technology, the technology has been more and more researched and applied. In existing near-field magnetically coupled wireless power transfer systems, the transmitter usually works near one frequency. For the WPT system, the lower operating frequency helps to reduce the loss of the inverter and the line at the transmitting end, but its transmission distance is very short. On the other hand, in order to increase the distance of wireless power transmission, it is often necessary to increase the design operating frequency of the WPT system. According to Faraday's law of electromagnetic induction, a higher operating frequency helps to increase the induced voltage when the mutual inductance of the coupling coil is low. The low-frequency and high-frequency WPT systems have their corresponding application scenarios. The low-frequency short-distance transmission mode is suitable for applications such as laptops with a relatively short charging distance, while the high-frequency medium-distance transmission mode can be used for smartphones and other applications where the wireless charger is farther away from the terminal.
综上所述，在现有WPT系统中，其发射端工作在一个频率点附近，因此，仅能适配近距离或中距离的应用。从而使得不同类型的终端需要不同发射端进行适配，造成了适配器的重复浪费，不利于节能环保。To sum up, in the existing WPT system, its transmitter works near a frequency point, so it can only adapt to short-distance or medium-distance applications. As a result, different types of terminals need to be adapted by different transmitters, resulting in repeated waste of adapters, which is not conducive to energy saving and environmental protection.
实用新型内容Utility model content
为解决上述问题，本实用新型公布了一种多频工作的无线电能传输发射端电路。本实用新型的发射线圈可同时或分时工作于多个频率点，所涉及的发射端电路可以同时适配不同工作频率的接收端电路，从而减少发射端的数量，避免无线充电发射端的重复浪费，还可以同时适配不同工作频率的接收端电路，从而减少发射端的数量，避免无线充电发射端的重复浪费。In order to solve the above problems, the utility model discloses a multi-frequency working wireless power transmission transmitter circuit. The transmitting coil of the utility model can work at multiple frequency points at the same time or in time-sharing, and the involved transmitting end circuits can simultaneously adapt to receiving end circuits of different operating frequencies, thereby reducing the number of transmitting ends and avoiding repeated waste of wireless charging transmitting ends. It can also be adapted to receiver circuits with different operating frequencies at the same time, thereby reducing the number of transmitters and avoiding repeated waste of wireless charging transmitters.
为达到上述技术效果，本实用新型的技术方案是：For reaching above-mentioned technical effect, the technical scheme of the utility model is:
一种多频工作的无线电能传输发射端电路，包括1个发射线圈和不少于2个的接收线圈，所述发射线圈连接有多个发射电路；所述发射电路包括一个将直流电变为交流电的逆变器，逆变器连接有将交流电进行合成的发射端补偿电路，各发射端补偿电路并联后与接收线圈连接；各逆变器之间发出的交流电的频率各不相同，以适应不同的传输距离；逆变器发出的交流电依次通过发射端补偿电路和发射线圈被接收对应频率交流电的接收线圈接收，接收线圈将交流电传递给接收端补偿电路，接收端补偿电路连接有将交流电进行整流并将交流电变为直流电然后与对应负载连接的整流器。A multi-frequency wireless power transmission transmitter circuit, including a transmitter coil and no less than 2 receiver coils, the transmitter coil is connected to a plurality of transmitter circuits; the transmitter circuit includes a DC to AC The inverter is connected with a transmitter compensation circuit that synthesizes alternating current, and each transmitter compensation circuit is connected in parallel to the receiving coil; the frequency of the alternating current sent by each inverter is different to adapt to different The transmission distance; the alternating current sent by the inverter is received by the receiving coil that receives the corresponding frequency alternating current through the transmitting end compensation circuit and the transmitting coil in turn, and the receiving coil transmits the alternating current to the receiving end compensation circuit, and the receiving end compensation circuit is connected to rectify the alternating current A rectifier that converts alternating current into direct current and then connects to the corresponding load.
进一步的改进，各逆变器传出的交流电频率至少相差5倍。As a further improvement, the frequency of the alternating current transmitted by each inverter differs by at least 5 times.
进一步的改进，所述逆变器的逆变拓扑为全桥逆变拓扑或半桥逆变拓扑或推挽逆变拓扑或E类逆变拓扑。As a further improvement, the inverter topology of the inverter is a full-bridge inverter topology, a half-bridge inverter topology, a push-pull inverter topology, or an E-type inverter topology.
进一步的改进，所述接收端补偿电路为串联谐振补偿电路或非串联谐振补偿电路。As a further improvement, the compensation circuit at the receiving end is a series resonance compensation circuit or a non-series resonance compensation circuit.
进一步的改进，所述发射端补偿电路包括电感器件与电容器件。As a further improvement, the transmitter compensation circuit includes an inductance device and a capacitor device.
本实用新型的优点:Advantage of the utility model:
本实用新型的发射线圈可同时或分时工作于多个频率点。当耦合线圈的距离较近时，系统工作于低频近距离模式，从而适配接收端工作频率较低的终端。当耦合线圈的距离较远时，系统工作在高频中距离模式，从而适配接收端工作频率较高的终端。本实用新型所涉及的发射端电路可以同时适配不同工作频率的接收端电路，从而减少发射端的数量，避免无线充电发射端的重复浪费。The transmitting coil of the utility model can work at multiple frequency points simultaneously or time-sharingly. When the distance between the coupling coils is relatively short, the system works in the low-frequency short-distance mode, thereby adapting to terminals with lower operating frequencies at the receiving end. When the distance of the coupling coil is relatively long, the system works in the high-frequency medium-distance mode, so as to adapt to the terminals with higher working frequency at the receiving end. The transmitter circuit involved in the utility model can adapt to receiver circuits with different working frequencies at the same time, thereby reducing the number of transmitters and avoiding repeated waste of wireless charging transmitters.
附图说明Description of drawings
图1现有的无线电能传输流程示意图；Fig. 1 is a schematic diagram of an existing wireless power transmission process;
图2实施例的无线电能传输流程示意图；The schematic diagram of the wireless power transmission process of the embodiment of Fig. 2;
图3实施例发射电路仿真电路图；Fig. 3 embodiment transmitting circuit emulation circuit diagram;
图4实施例发射电路的电流电压仿真波形示意图；The current and voltage simulation waveform schematic diagram of the transmitting circuit of Fig. 4 embodiment;
图5实施例接收电路仿真电路图；Fig. 5 embodiment receiving circuit simulation circuit diagram;
图6实施例发射线圈电流和接收线圈电流仿真波形示意图。Fig. 6 is a schematic diagram of simulation waveforms of transmitting coil current and receiving coil current in the embodiment.
具体实施方式Detailed ways
实施例Example
如图2-6所示的一种多频工作的无线电能传输发射端电路，包括一个发射线圈11和两个接收线圈，两个接收线圈分别为接收线圈一12和接收线圈二13，发射线圈12连接有两个并联的发射电路，一个发射电路包括将直流电变为高频交流电的逆变器一1，逆变器一1连接有将高频交流电进行合成的发射端补偿电路一2；另一个发射电路包括将直流电变为低频交流电的逆变器二6，逆变器二6连接有将低频交流电进行合成的发射端补偿电路二7；发射端补偿电路一2和发射端补偿电路二7并联后与发射线圈11连接；接收线圈一12接收到逆变器一1发出的高频电流后，将高频电流传递给接收端补偿电路一3，接收端补偿电路一3连接有将高频交流电进行整流并将交流电变为直流电并与工作频率较高的负载一5连接的整流器一4；接收线圈二13接收到逆变器二6发出的低频电流后，将低频电流传递给接收端补偿电路二8，接收端补偿电路二8连接有将低频交流电进行整流并将低频交流电变为直流电并与工作频率较低的负载二10连接的整流器二9；逆变器一1发出的高频交流电的频率是逆变器二6发出的低频交流电的频率的5倍。所述接收端补偿电路一3为串联谐振补偿电路。As shown in Figure 2-6, a multi-frequency wireless power transmission transmitter circuit includes a transmitting coil 11 and two receiving coils, the two receiving coils are receiving coil one 12 and receiving coil two 13, and the transmitting coil 12 is connected with two parallel transmission circuits, one transmission circuit includes an inverter-1 that converts direct current into high-frequency alternating current, and inverter-1 is connected with a transmission end compensation circuit-2 that synthesizes high-frequency alternating current; the other A transmitting circuit includes an inverter 2 6 for converting direct current into low-frequency alternating current, and the inverter 2 6 is connected with a transmitting end compensation circuit 2 7 for synthesizing low-frequency alternating current; transmitting end compensation circuit 1 2 and transmitting end compensation circuit 2 7 After being connected in parallel, it is connected with the transmitting coil 11; after receiving the high-frequency current sent by the inverter-1, the receiving coil-12 transmits the high-frequency current to the receiving-end compensation circuit-3, and the receiving-end compensation circuit-3 is connected with the high-frequency Rectifier 1 4 that rectifies the alternating current and converts the alternating current into direct current and is connected to the load 5 with higher operating frequency; after the receiving coil 2 13 receives the low-frequency current from the inverter 2 6, it transmits the low-frequency current to the receiving end for compensation Circuit two 8, receiving end compensation circuit two 8 is connected with a rectifier two 9 that rectifies the low-frequency alternating current and converts the low-frequency alternating current into direct current and connects to the load two 10 with a lower working frequency; the high-frequency alternating current generated by the inverter one 1 The frequency is 5 times of the frequency of the low-frequency alternating current that the inverter 2 6 sends. The receiver compensation circuit one 3 is a series resonance compensation circuit.
如图2所示发射端补偿电路一2与发射端补偿电路二7共用一个发射线圈。逆变器的输出电压或电流经过相应的补偿电路后给发射线圈11馈电，接收线圈的感应电动势经过相应的接收端补偿电路后进行整流并给各自的负载进行直流供电。As shown in FIG. 2 , the transmitter compensation circuit 1 2 and the transmitter compensation circuit 2 7 share a transmitter coil. The output voltage or current of the inverter feeds the transmitting coil 11 after passing through the corresponding compensation circuit, and the induced electromotive force of the receiving coil passes through the corresponding receiving end compensation circuit to rectify and supply DC power to the respective loads.
两个逆变器分别输出高频与低频的交流电压(电流)，这两者的功率传输是相互独立的。发射端补偿电路将两者进行合成，接收端补偿电路将两者进行分离。整流器一4与整流器二9分别对不同频率的交流电进行整流，从而利用为各自的负载进行直流供电。由此可见，本实用新型所提出的方案与现有技术的明显区别在于，其WPT系统的发射电路工作于两个频率，传输功率的方式与现有的技术方案有明显区别。The two inverters respectively output high-frequency and low-frequency AC voltage (current), and the power transmission of the two is independent of each other. The compensation circuit at the transmitting end synthesizes the two, and the compensation circuit at the receiving end separates the two. The first rectifier 4 and the second rectifier 9 respectively rectify alternating currents of different frequencies, so as to provide direct current power for respective loads. It can be seen that the obvious difference between the solution proposed by the utility model and the prior art lies in that the transmission circuit of the WPT system works at two frequencies, and the way of transmitting power is obviously different from the existing technical solution.
如图3所示，是本实施例的发射电路仿真电路图。三相电经过桥式整流后输出稳定的直流电，逆变器一1与逆变器二6分别将其输入直流电转换为交流电。在实施例中，逆变器均为全桥逆变器。根据不同的系统，其逆变拓扑也可以为半桥、推挽、E类等等。发射端补偿电路一2的电容一14与电感一15的谐振频率为逆变器一1的输出频率，发射端补偿电路二7的电容二16与电感二17的谐振频率为逆变器二6的输出频率。通过谐振环节的滤波作用，逆变器的输出电流近似为正弦。逆变器一1与逆变器二6的输出电流在发射线圈进行叠加。发射端补偿电路一2还包含电容三18，发射端补偿电路二7还包含电容四19，电容三18与电容四19用于调解逆变器一与逆变器二的负载阻抗。As shown in FIG. 3 , it is a simulation circuit diagram of the transmitting circuit of this embodiment. After the three-phase power is bridge-type rectified, it outputs stable direct current, and the inverter one 1 and the second inverter 6 respectively convert the input direct current into alternating current. In an embodiment, the inverters are all full-bridge inverters. According to different systems, its inverter topology can also be half-bridge, push-pull, class E and so on. The resonant frequency of the capacitor 14 and the inductor 15 of the transmitter compensation circuit 1 is the output frequency of the inverter 1, and the resonance frequency of the capacitor 16 and the inductor 17 of the transmitter compensation circuit 2 7 is the inverter 2 6 output frequency. Through the filtering effect of the resonance link, the output current of the inverter is approximately sinusoidal. The output currents of inverter one 1 and inverter two 6 are superimposed in the transmitting coil. The transmitter compensation circuit 1 2 further includes a capacitor 3 18 , and the transmitter compensation circuit 2 7 further includes a capacitor 4 19 . The capacitor 3 18 and the capacitor 4 19 are used to adjust the load impedance of the inverters 1 and 2 .
图4为实施例中电流的仿真波形，从上至下分别为发射线圈11电流、逆变器一1输出电流、逆变器二6输出电流、逆变器一1输出电压、逆变器二6输出电压；如图6所示，至上而下分别为发射线圈11电流、接收线圈一12的电流仿真波形。由实施例仿真波形可知，发射线圈11的电流波形与传统的WPT系统不同。其最大的区别在于，其交流电流包含两个频率的谐波。发射线圈11的高频与低频谐波分量均能传输电能。根据不同的工作模式，逆变器一1与逆变器二6可以同时工作或者仅有一个进行工作。Fig. 4 is the simulation waveform of the electric current in the embodiment, and from top to bottom is the current of transmitting coil 11, the output current of inverter one 1, the output current of inverter two 6, the output voltage of inverter one 1, the output voltage of inverter two 6. Output voltage; as shown in FIG. 6, from top to bottom are the current simulation waveforms of the transmitting coil 11 and the receiving coil 12 respectively. It can be known from the simulation waveform of the embodiment that the current waveform of the transmitting coil 11 is different from that of the traditional WPT system. Its biggest difference is that its alternating current contains harmonics of two frequencies. Both the high-frequency and low-frequency harmonic components of the transmitting coil 11 can transmit electric energy. According to different working modes, the first inverter 1 and the second inverter 6 can work at the same time or only one can work.
如图5所示，实施例中接收电路使用串联谐振补偿，谐振频率为逆变器一1的输出频率。根据不同的应用，其补偿电路也可以非串联谐振补偿。As shown in FIG. 5 , the receiving circuit in the embodiment uses series resonance compensation, and the resonance frequency is the output frequency of the inverter-1. According to different applications, its compensation circuit can also be non-series resonance compensation.
如图6所示，至上而下分别为发射线圈1电流、接收线圈一12电流。因此，接收线圈一12仅接收由逆变器一1输出的有功功率，而自动滤除低次谐波。同样的，接收线圈二1的谐振频率也为逆变器二6的输出频率，从而仅接收逆变器二6输出的有功功率。As shown in FIG. 6 , the current from the top to the bottom is the current of the transmitting coil 1 and the current of the receiving coil 12 respectively. Therefore, the receiving coil-12 only receives the active power output by the inverter-1, and automatically filters out low-order harmonics. Similarly, the resonant frequency of the second receiving coil 1 is also the output frequency of the second inverter 6, so that only the active power output by the second inverter 6 is received.
从实施例中可明显推断出，发射电路和接收电路均可为多个。It can be clearly inferred from the embodiments that there may be multiple transmitting circuits and receiving circuits.
本实用新型中逆变器的逆变拓扑可为为全桥逆变拓扑或半桥逆变拓扑或推挽逆变拓扑或E类逆变拓扑等各种结构，并不限于上述几种。The inverter topology of the inverter in the present invention can be various structures such as full-bridge inverter topology, half-bridge inverter topology, push-pull inverter topology or E-type inverter topology, and is not limited to the above-mentioned types.
以上实例的说明只是用于帮助理解本实用新型的核心思想；同时，对于本领域的一般技术人员，依据本实用新型的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本实用新型的限制。The description of the above examples is only used to help understand the core idea of the present utility model; meanwhile, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation and application range, in summary As stated above, the contents of this specification should not be construed as limiting the present utility model.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520350850.4UCN204633480U (en) | 2015-05-27 | 2015-05-27 | A wireless power transmission transmitter circuit with multi-frequency operation |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520350850.4UCN204633480U (en) | 2015-05-27 | 2015-05-27 | A wireless power transmission transmitter circuit with multi-frequency operation |
| Publication Number | Publication Date |
|---|---|
| CN204633480Utrue CN204633480U (en) | 2015-09-09 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520350850.4UExpired - Fee RelatedCN204633480U (en) | 2015-05-27 | 2015-05-27 | A wireless power transmission transmitter circuit with multi-frequency operation |
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|---|---|---|---|---|
| CN104967222A (en)* | 2015-05-27 | 2015-10-07 | 福建工程学院 | A wireless power transmission transmitter circuit with multi-frequency operation |
| CN105958611A (en)* | 2016-06-16 | 2016-09-21 | 上海阪辉新能源科技有限公司 | Non-contact charging device for improving charging efficiency by employing different working frequencies |
| CN106300580A (en)* | 2016-08-31 | 2017-01-04 | 上海阪辉新能源科技有限公司 | A kind of non-contact charging device controls the method for output |
| CN107104613A (en)* | 2017-06-29 | 2017-08-29 | 同济大学 | A kind of synchronous electric motor rotor exciting method and device |
| CN112928828A (en)* | 2021-02-05 | 2021-06-08 | 郑州轻工业大学 | Frequency-adjustable device for outputting multi-frequency sine waves by single inverter |
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104967222A (en)* | 2015-05-27 | 2015-10-07 | 福建工程学院 | A wireless power transmission transmitter circuit with multi-frequency operation |
| CN105958611A (en)* | 2016-06-16 | 2016-09-21 | 上海阪辉新能源科技有限公司 | Non-contact charging device for improving charging efficiency by employing different working frequencies |
| CN106300580A (en)* | 2016-08-31 | 2017-01-04 | 上海阪辉新能源科技有限公司 | A kind of non-contact charging device controls the method for output |
| CN107104613A (en)* | 2017-06-29 | 2017-08-29 | 同济大学 | A kind of synchronous electric motor rotor exciting method and device |
| CN112928828A (en)* | 2021-02-05 | 2021-06-08 | 郑州轻工业大学 | Frequency-adjustable device for outputting multi-frequency sine waves by single inverter |
| CN112928828B (en)* | 2021-02-05 | 2024-11-26 | 浙江水利水电学院 | A device for outputting multi-frequency sine waves from a single inverter with adjustable frequency |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | Granted publication date:20150909 Termination date:20180527 | |
| CF01 | Termination of patent right due to non-payment of annual fee |