摘要
为在较大的转速范围内准确测量转速而又不过多地占用DSP的硬、软件资源,深入分析传统测量方法应用于定点DSP存在的问题,提出了一种适合于定点DSP测速方法,该方法通过设定最小计数脉冲和最小测速时间来限制最大相对和绝对误差。使用乘法和移位运算取代除法,从而节省DSP的运算时间。将之用于直驱式永磁同步风力机转速的测量,实验结果表明,该方法可以在较大的转速范围内实现准确测速。
The problems of the traditional speed measurement methods applied to fixed-pointed DSP were analyzed and a novel method fit for fixed-pointed DSP was proposed,which can measure the speed accurately in a large speed range but needn′t occupy too much hardware and software of the DSP.The new method has two advantages.Firstly,the absolute and relative errors of the speed measurement are limited by setting the minimum pulse number and measurement time.Secondly the division is replaced by multiplication and shift to save calculation time of the DSP.The proposed method was applied to measure the speed of the permanent magnet synchronous generator in the direct driven wind energy system.The validity of the proposed method is proved by the experimental results.
出处
《电气传动》
北大核心
2010年第6期72-74,共3页
Electric Drive
基金
青岛市科技计划项目(07-2-3-15-jch-4)
关键词
测速
光电编码器
电机控制
speed measurement
optical encoder
motor control
