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TMS320F28335: C2000ware Digital Power里的锁相环使用接口

Part Number: TMS320F28335
Other Parts Discussed in Thread: C2000WARE, C2000WARE-DIGITALPOWER-SDK, TIDM-02008

如图,稍微有点糊。

说明文档的意思就是将结构体和采样到的电压,以固定的中断频率执行锁相环运算。文档说这里的ac_vol_sensed是测量交流电压的pu值,也就是标幺值吧。我在实际开发过程中计算得到了交流电压的有名值之后,以何值为基准来得到pu值呢?