摘要
超声振动系统中,匹配电路的设计是根据换能器自身参数来确定的,通常并未考虑换能器与振动系统中其他设备连接时所引起的问题。实际上,压电换能器与整个超声振动系统连接后将引起动态电阻R1的变化,最初确定的匹配电路的匹配效果不佳。因此,利用动态电阻R1与T型网络电参数间的影响关系及匹配电路的2个匹配条件,重新优化调整T型匹配电路中的3个电参量,并用Multisim软件对优化后的电路进行仿真。结果表明,静态匹配条件下,优化后的T型匹配电路起到了更好的调谐作用,超声振动系统的输出功率和振动效率较优化前的匹配状态有较大提升,实现了最佳匹配效果。
In the ultrasonic vibration system, matching circuit is often determined by parameters of the transducer, but it does not take into account the connection problems between the transducer and other equipment in the vibration system. In fact, dynamic resistor R1 will be changed when piezoelectric transducer is connected with the ultrasonic vibration system, the initial matching circuit can not make a good effect. Therefore, by using the two matching circuit condition and the relationship between R1 and the parameters, three electrical parameters of T-type matching circuits are reoptimized,and use Multisim software to simulate the optimized T matching circuit. The results indicate that the optimized T matching circuit makes the whole efficiency and active power of ultrasonic vibration system hotter than initial matching status under the condition of static matching.
出处
《压电与声光》
CAS
CSCD
北大核心
2014年第5期861-864,共4页
Piezoelectrics & Acoustooptics
基金
国家自然科学基金资助项目(50975191)
关键词
压电换能器
匹配电路
调谐
动态电阻
电参数
piezoelectric transducer
matching circuit
tuning
dynamic resistance
electrical parameter
