旋转超声加工中的频率跟踪技术研究  

Research on Frequency Tracking in Rotary Ultrasonic Machining

作　　者：姚震[1] 郭钟宁[1] 张永俊[1] 张伟涛[1] 

机构地区：[1]广东工业大学,广东广州510006

出　　处：《机床与液压》2013年第21期5-7,共3页Machine Tool & Hydraulics

基　　金：国家自然科学基金资助项目(51275097);机械系统与振动国家重点实验室开放基金资助项目(MSV-2013-08)

摘　　要：针对旋转超声加工的特点,设计旋转超声电源的匹配电路,分析换能器的阻抗特性和频率特性。提出利用最大电流法进行扫频、利用锁相环技术进行频率跟踪的方法和动态调整匹配电感和驱动频率的控制策略。并通过实验验证提出的频率跟踪方法可行有效,能消除温度、负载变化对换能器谐振工作的影响。According to the characteristics of rotary ultrasonic machining,rotary ultrasonic power matching circuit was designed. The frequency tracking method was presented that PLL was utilized on fine frequency tracking and maximum current method on frequen-cy scanning. A control strategy of frequency tracking based on adjusting matching inductance and driving frequency was described. The experimental results verify the proposed compound frequency tracking method is feasible and effective. It can be used to eliminate the effects of temperature,load changes on the transducer resonance.

关 键 词：旋转超声加工 频率跟踪 感应供电 动态匹配 

分 类 号：TM402[电气工程—电器]