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TMS320F28335: 软件锁相环

Other Parts Discussed in Thread: C2000WARE

采用PWM中断(开关频率为10kHz),用软件锁相环计算电网电压角频率,得到的结果最开始在314附近波动,但每隔一段时间(约3.7s左右)后角频率会增大一点,最后增大到无穷大。可能是什么原因导致的呢?

角频率波形是这样的,一段时间后又会增加一点。

已解决:相位积分溢出。