磁耦合共振及负载并联谐振式无线供电设计

Design of Wireless Power Supply based on Magnetic Coupling Resonance and Load Parallel Resonance

设计了基于并联谐振原理的磁耦合谐振式高效无线输电装置,电路由能量转换模块、谐波生成模块、并联无线输电模块、无线接收模块及负载模块构成。通过对电源中的电能进行调制,用谐振的方式通过开关电源电路提供到无线发射端的电源部分,并且高效地传输转化得到的能量。谐波生成模块频率与金属线圈刚好匹配,用来调制线圈电流。无线输电模块中的发射线圈的前端采用全桥逆变,通过对线圈等效电感的计算,选择合适的谐振电容,可使传输能力最大化。实验验证了接受端线圈可实现50cm的范围内10W的功率传输,效果符合要求。

A magnetic coupling resonant high-efficiency wireless transmission device based on parallel resonance principle is designed.The circuit is composed of energy conversion module,harmonic generation module,parallel wireless transmission module,wireless receiving module and load module.By modulating the electric energy in the power supply,it is provided to the power supply part of the wireless transmitting end through the switching power supply circuit in a resonant manner,and the converted energy is transmitted efficiently.The frequency of the harmonic generation module is just matched with the metal coil to modulate the coil current.The front end of the transmitting coil in the wireless transmission module adopts full bridge inverter.Through the calculation of the coil equivalent inductance and the selection of appropriate resonant capacitance,the transmission capacity can be maximized.Experiments show that the receiving end coil can realize 10W power transmission in the range of 50cm,and the effect meets the requirements.