不等比例PWM脉冲技术在顶部振打器上的应用  

Application of inequality proportion PWM impulse in top magnetic shaker

作　　者：王涌[1] 郑博闻[1] 王威[1] 

机构地区：[1]浙江工业大学信息工程学院,浙江杭州310032

出　　处：《机电工程》2011年第12期1473-1477,共5页Journal of Mechanical & Electrical Engineering

基　　金：浙江省科技支撑和引导资助项目(2008C21096)

摘　　要：为解决顶部振打器中控制器的精度等问题,将不等比例脉冲技术应用于顶部振打器中。开展了不等比例PWM脉冲技术原理的分析,建立了占空比和波形之间的关系,提出了新型的采用不等比例插入技术产生的非均匀PWM脉冲的原理和实现方法。在数字式DC-DC基础开关电路上对通用的8位微处理器和场效应管开关器件进行了评价,并进行了不等比例PWM技术实验验证。研究结果表明,非均匀PWM脉冲具有明显降低输出平均电压稳态误差的作用,提高了输出平均电压的精度,考虑了实际应用中对提高输出精度存在的各种外部综合因素,给出了合理选择该技术方法的依据。In order to solve the problems of the accuracy of pulse in top magnetic shaker,the inequality proportion PWM impulse was investigated.After the analysis of inequality proportion PWM impulse,the relationship between duty cycle and waveform was established.A method was presented to the fundament and implementation method of the non-uniform pulse width modulation impulse.The universal 8-bit microcontroller and FET switching device were evaluated on the basis of the block diagram of digital DC-DC switched circuit,the inequality proportion PWM impulse technique were tested.The experimental results show that the theory is correct.Lastly,to practical application,the different exterior composite factor is analyzed,and the ways to select the new technique with appropriately are supplied.

关 键 词：稳态误差 非均匀PWM脉冲 精度 

分 类 号：TM46[电气工程—电器] TH43[机械工程—机械制造及自动化]