由于传统的压电作动器驱动易造成严重发热、波形欠佳以及处理速度要求较高等问题,本文提出了一种新型的基于压电作动器的非共振型直线电机及其驱动方式.为满足作动器大容性负载特性及其驱动器对高频率的需求,通过电路匹配分析,提出了直流升压变换器和谐振变换的驱动方案,设计了偏压电路使输出驱动波形满足作动器驱动电压的要求.采用傅里叶变换对设计的电路波形及电路功率进行了分析与计算,结果显示采用新驱动方式电路消耗的功率仅是线性驱动方式的61.7％.将设计的新驱动电路用于双作动器驱动的新型非共振型直线电机驱动实验表明,电机运转平稳,电路功耗小,实现了变频和变压驱动.%Aiming at the shortcomings of traditional drivers by piezoelectric actuators in overheating, driving signal distortion and high speed requirements, this paper researches a driving method for a new motor based on the piezoelectric actuator. A driving circuit for the piezoelectric actuator based on a direct current step-up converter and a resonant circuit was proposed according to the circuit analysis of large capacitive load characteristic of a multilayer piezoelectric actuator. An offset circuit was presented to meet the demand of unbalanced voltage driving of the piezoelectric actuator. The Fourier method was used for the circuit wave analysis and power saving. Experiments show that the power consumption of the new driving circuit is 61. 7% that of traditional linear drive circuits. It proved that the presented method is reliable for the drive of a new type of non-resonant piezoelectric motor. The experimental results indicate that the developed circuit could drive the motor smoothly with lower power losses, and the variable frequency and drive voltage have been realized.
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