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280X的DMC库文件f280xileg_vdc.h(电流、电压采样头文件)疑问,求解!



下面是从f280xileg_vdc.h文件摘录的注释:

// Note: Assuming the base DC-bus voltage is 24 volt
// - ADC input for Vdc_bus range is 24*1/(24.9+1) = 0.927 volt on DMC550
// - Then, Vdc_bus gain = 3.0/0.927 = 3.2375(or 0x675C in Q13)

放大系数的除数为什么是3.0?3.2375的Q13格式应该是0x3799吧?还有就是3.0/0.927 应该是3.2362 。