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为提高超声振动系统的非接触式电能传输效率,对系统的电路补偿网络进行了研究和设计。结合压电振子的等效电路和松耦合系统的互感模型,阐明了电路补偿的理论依据,提出各自独立地对原、副边回路进行补偿,以消除互感的影响。结合理论和仿真计算的结果,设计并建立了超声振动系统非接触式电能传输的电路补偿网络。对系统的输出振幅进行实验测量,结果显示:补偿后的振幅得到了大幅提升,且气隙值越大、电功率越大,补偿效果越显著。对于超声振动系统的非接触式电能传输,所建立的补偿方法能够显著地减小无功损耗,提高能量传输效率,补偿网络设计合理、有效。
In order to improve the non-contact power transmission efficiency of ultrasonic vibration system, the circuit compensation network of the system is studied and designed. Based on the mutual inductance model of piezoelectric oscillator and the loosely coupled system, the theoretical basis of circuit compensation is expounded, and the compensation of the primary and secondary circuits are proposed separately to eliminate the influence of mutual inductance. Combined with the theoretical and simulation results, a circuit compensation network for non-contact power transmission of ultrasonic vibration system was designed and established. The experimental results show that the amplitude after compensation has been greatly improved, and the larger the air gap value, the larger the electric power, the more significant the compensation effect. For non-contact power transmission of ultrasonic vibration system, the established compensation method can significantly reduce the reactive power loss and improve the energy transmission efficiency, and the compensation network design is reasonable and effective.