A multi-frequency and multi-load wireless charging platform with load isolation characteristics is composed of AC current source, transmitting coil, LC multi-frequency tuning network and receivers with different operating frequencies. AC current source can generate AC current with N different frequency components. The transmitting coil adopts the structure of Helmholtz coil, which is placed in two coaxial axes and the center distance is equal to the radius of the coil. The LC multi-frequency tuning network consists of N parallel arm capacitors and N_1 series arm inductors; the receiver consists of receiving coils, tuning capacitors and loads; the AC inverting current source, transmitting coil L1 and LC multi-frequency tuning network are connected in series to form the transmitting part of the source end; the receiver can be placed at any position of the charging platform when working. The utility model has the advantages of simple structure and easy implementation, and can support multiple radio energy receivers with different working frequencies to charge simultaneously, and the receivers are isolated from each other and do not interfere with each other.
【技术实现步骤摘要】
一种具有负载隔离特性的多频多负载无线充电平台
本技术属于无线电能传输
技术介绍
无线电能传输技术因其干净，方便，安全的优点而广受青睐。目前，无线电能传输
已形成Qi、PMA、A4WP、SAE、PT61980等多个技术标准，然而遵循这些标准的无线电能传输系统通常工作在单一频率，且其工作频率并不统一，例如：Qi工作频段为110-205kHz、PMA工作频段为110-300kHz、A4WP工作频段为6.78Mhz±15kHz、SAE工作频段为81.38-90kHz。目前已有的单一工作频率的无线电能充电平台只能供与其工作频率相同的接收机进行充电，无法给多个不同工作频率的接收机充电。为了解决这一问题，文献“KimY,HaD,ChappellWJ,etal.SelectiveWirelessPowerTransferforSmartPowerDistributioninaMiniature-SizedMultiple-ReceiverSystem[J].IEEETransactionsonIndustrialElectronics,2016,63(3):185...
【技术保护点】
1.一种具有负载隔离特性的多频多负载无线充电平台，其特征是由交流电流源、发射线圈、LC多频调谐网络和多个不同工作频率的接收机组成；所述的交流电流源为可产生含有N个不同频率分量的交流电流源，由AC‑DC电路、逆变电路、FPGA控制电路构成；220V50/60Hz市电经AC‑DC变换后给逆变电路供电；逆变电路采用全桥电流型逆变电路，同时通过FPGA编程输出逆变器开关管的控制信号，得到交流电流源的输出电流波形包含所需的各正弦频率分量，各正弦频率分量的角频率按由小到大次序排列分别为ω1,ω2,…,ωN，角频率和频率的关系满足ωi＝2πfi(i＝1,2,…,N)，各正弦频率分量电流幅...
【技术特征摘要】
1.一种具有负载隔离特性的多频多负载无线充电平台，其特征是由交流电流源、发射线圈、LC多频调谐网络和多个不同工作频率的接收机组成；所述的交流电流源为可产生含有N个不同频率分量的交流电流源，由AC-DC电路、逆变电路、FPGA控制电路构成；220V50/60Hz市电经AC-DC变换后给逆变电路供电；逆变电路采用全桥电流型逆变电路，同时通过FPGA编程输出逆变器开关管的控制信号，得到交流电流源的输出电流波形包含所需的各正弦频率分量，各正弦频率分量的角频率按由小到大次序排列分别为ω1,ω2,…,ωN，角频率和频率的关系满足ω...
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