摘要
本文介绍了一种低成本、高性能的三相交流电源信号发生模块的设计方法。根据DDS原理,在CPLD内构建逻辑,通过外部RAM的分时复用产生了三路频率变化范围为30 Hz～15 kHz、幅值变化范围为0～20 V、相位可调范围为0°～360°的同步正弦信号,同时对输出的三相正弦信号进行实时反馈监测,从而进一步提高了输出的精确度。可根据需要对该模块的输出信号进行功率放大,然后通过监测功放的输出信号调节偏差,保证输出精度。
This paper introduces a kind of three-phase AC power source signal module with high performance, low cost. According to the DDS principle, constructing logic in the CPLD and sharing the external RAM in different time, the three-phase AC power source is realized of which the value（0-20 V） ,the frequency（30 Hz-15 kHz） and the phase（0°- 360°） can adjust at will. At the same time, using feedback measurement circuit to meet the high accuracy of source output. The output signal of this module can be amplified to meet need of the power amplifier, and through adjusting deviation, a higher accuracy can be gotten by monitoring the output of the power amplifier.
出处
《国外电子测量技术》
2008年第11期29-32,共4页
Foreign Electronic Measurement Technology
关键词
三相交流电源
分时复用
CPLD
反馈监测
three-phase AC power source
sharing in different time
CPLD
feedback measurement
