基于谐振升压的小型超声波电机驱动器

The Micro Ultrasonic Motor Driver Based on Resonant Boost Circuit

针对小型化超声波电机应用前景,重点解决超声波电机驱动电路小型化难题,采用谐振升压驱动原理,完成超声波电机驱动器小型化。小型超声波电机驱动器应用谐振升压驱动技术和半桥逆变技术优化了驱动方案,减省了难以小型化的变压器,有效地缩减了驱动电路体积。从超声波电机等效电路建模与LC谐振电路分析出发,研究了驱动电路输出波形、最佳匹配电感的选取以及真实电感对驱动输出的影响,并借助Matlab/Simulink仿真平台分析了谐振升压输出波形。最后通过实验验证了谐振升压电路对柱状行波型超声波电机的驱动性能。实验结果表明,谐振升压驱动电路驱动器性能达标,且比传统变压器式驱动电路体积大幅降低。

According to the application prospect of the miniaturized ultrasonic motor,and focusing on the miniaturization problem of the ultrasonic motor driving circuit,a miniaturized driving circuit based on resonant boost principle is designed.To reduce the colume of the driving circuit,the resonant boost and micro half-bridge inverter are applied to exclude the transformers which are difficult to be miniaturized.Based on the modeling of the ultrasonic motor equivalent circuit and the analysis of the LC resonant circuit,the driving circuit output waveform,the selection of the best matching inductor and the influence of real inductance are researched.The resonant boost output waveform is analyzed based on Matlab/Simulink simulation platform.The driving performance of the resonant boost circuit on the columnar traveling wave type ultrasonic motor is verified by experiments.The experimental results show that the performance meets expectation,and the size is much smaller than the traditional driving circuit with transformers.