TI中文支持网Part Number:TMS320F28034
#ifndef __SVGEN_MF_H__
#define __SVGEN_MF_H__
typedef struct { _iq Gain; // Input: reference gain voltage (pu) _iq Offset; // Input: reference offset voltage (pu)
_iq Freq; // Input: reference frequency (pu)
_iq FreqMax; // Parameter: Maximum step angle = 6*base_freq*T (pu)
_iq Alpha; // History: Sector angle (pu)
_iq NewEntry; // History: Sine (angular) look-up pointer (pu)
Uint32 SectorPointer; // History: Sector number (Q0) – independently with global Q
_iq Ta; // Output: reference phase-a switching function (pu) _iq Tb; // Output: reference phase-b switching function (pu)
_iq Tc; // Output: reference phase-c switching function (pu)
_iq StepAngle; // Variable
_iq EntryOld; // Variable
_iq dx; // Variable
_iq dy; // Variable
} SVGENMF;
/*—————————————————————————–
Default initalizer for the SVGENMF object.
—————————————————————————–*/#define SVGENMF_DEFAULTS { 0,0,0,0,0,0,0,0,0,0,0,0,0,0 }
/*——————————————————————————
SVGENMF Macro Definitions
——————————————————————————*/
#define PI_THIRD _IQ(1.04719755119660) /* This is 60 degree */
#define SVGENMF_MACRO(v) \
/* Normalise the freq input to appropriate step angle */ \
/* Here, 1 pu. = 60 degree */ \
v.StepAngle = _IQmpy(v.Freq,v.FreqMax); \
/* Calculate new angle alpha */ \
v.EntryOld = v.NewEntry; \
v.Alpha = v.Alpha + v.StepAngle; \
if (v.Alpha >= _IQ(1.0)) \
v.Alpha = v.Alpha-_IQ(1.0); \
v.NewEntry = v.Alpha; \
v.dy = _IQsin(_IQmpy(v.NewEntry,PI_THIRD)); /* v.dy = sin(NewEntry) */ \
v.dx = _IQsin(PI_THIRD-_IQmpy(v.NewEntry,PI_THIRD)); /* v.dx = sin(60-NewEntry) */ \
/* Determine which sector */ \
if (v.NewEntry-v.EntryOld<0) \
{ \
if (v.SectorPointer==5) \
v.SectorPointer = 0; \
else \
v.SectorPointer = v.SectorPointer + 1; \
} \
if (v.SectorPointer==0) /* Sector 1 calculations – a,b,c -. a,b,c*/ \
{ \
v.Ta = (_IQ(1.0)-v.dx-v.dy)>>1; \
v.Tb = v.Ta + v.dx; \
v.Tc = _IQ(1.0) – v.Ta; \
} \
else if (v.SectorPointer==1) /* Sector 2 calculations – a,b,c -. b,a,c & v.dx <-. v.dy*/ \
{ \
v.Tb = (_IQ(1.0)-v.dx-v.dy)>>1; \
v.Ta = v.Tb + v.dy; \
v.Tc = _IQ(1.0) – v.Tb; \
} \
else if (v.SectorPointer==2) /* Sector 3 calculations – a,b,c -. b,c,a */ \
{ \
v.Tb = (_IQ(1.0)-v.dx-v.dy)>>1; \
v.Tc = v.Tb + v.dx; \
v.Ta = _IQ(1.0) – v.Tb; \
} \
else if (v.SectorPointer==3) /* Sector 4 calculations – a,b,c -. c,b,a & v.dx <-. v.dy*/ \
{ \
v.Tc = (_IQ(1.0)-v.dx-v.dy)>>1; \
v.Tb = v.Tc + v.dy; \
v.Ta = _IQ(1.0) – v.Tc; \
} \
else if (v.SectorPointer==4) /* Sector 5 calculations – a,b,c -. c,a,b */ \
{ \
v.Tc = (_IQ(1.0)-v.dx-v.dy)>>1; \
v.Ta = v.Tc + v.dx; \
v.Tb = _IQ(1.0) – v.Tc; \
} \
else if (v.SectorPointer==5) /* Sector 6 calculations – a,b,c -. a,c,b & v.dx <-. v.dy*/ \
{ \
v.Ta = (_IQ(1.0)-v.dx-v.dy)>>1; \
v.Tc = v.Ta + v.dy; \
v.Tb = _IQ(1.0) – v.Ta; \
} \
/* Convert the unsigned GLOBAL_Q format (ranged (0,1)) . signed GLOBAL_Q format (ranged (-1,1)) */ \
/* Then, multiply with a gain and add an offset. */ \
v.Ta = (v.Ta-_IQ(0.5))<<1; \
v.Ta = _IQmpy(v.Gain,v.Ta) + v.Offset; \
\
v.Tb = (v.Tb-_IQ(0.5))<<1; \
v.Tb = _IQmpy(v.Gain,v.Tb) + v.Offset; \
\
v.Tc = (v.Tc-_IQ(0.5))<<1; \
v.Tc = _IQmpy(v.Gain,v.Tc) + v.Offset; \
#endif // __SVGEN_MF_H__
不太明白 这段算法 原理 ，请指教 不胜感谢！
Green Deng：
你好，为你将问题升级到英文E2E论坛了，还请留意论坛回复：e2e.ti.com/…/tms320f28034-detailed-description-of-svgenmf-h
