TMDSHVMTRPFCKIT: ACI Speed Estimator MACRO Definition

Part Number: TMDSHVMTRPFCKIT
Other Parts Discussed in Thread: CONTROLSUITE

Hi All,

I am working on HVACI_Sensorless project,

Could someone explain to me why in the ACISE macro slip is in per unit?

I cant see the idea behind the IQtoIQ21(v.Wslip), why we convert slip form qtoq21?

Is there any bloc diagram of the ACISE macro for more clarity ?

Thanks in advance,

S.Tarik,

#define ACISE_MACRO(v)															\
																				\
/*  Slip computation */															\
	v.SquaredPsi = _IQmpy(v.PsiDrS,v.PsiDrS)+_IQmpy(v.PsiQrS,v.PsiQrS);			\
																				\
	v.WSlip= _IQmpy(v.K1,(_IQmpy(v.PsiDrS,v.IQsS) - _IQmpy(v.PsiQrS,v.IDsS)));	\
	v.WSlip= _IQdiv(v.WSlip,v.SquaredPsi);										\
																				\
/*	Synchronous speed computation	*/											\
	if ((v.ThetaFlux < DIFF_MAX_LIMIT)&(v.ThetaFlux > DIFF_MIN_LIMIT))			\
/* 	Q21 = Q21*(GLOBAL_Q-GLOBAL_Q)*/												\
		  v.WSyn = _IQmpy(v.K2,(v.ThetaFlux - v.OldThetaFlux));					\
	else  v.WSyn = v.WPsi;														\
																				\
/* low-pass filter, Q21 = GLOBAL_Q*Q21 + GLOBAL_Q*Q21	*/						\
	v.WPsi = _IQmpy(v.K3,v.WPsi) + _IQmpy(v.K4,v.WSyn);							\
																				\
/* Q21 = Q21 - GLOBAL_Q */														\
	v.OldThetaFlux = v.ThetaFlux;												\
	v.WrHat = v.WPsi - _IQtoIQ21(v.WSlip);										\
																				\
/* Limit the estimated speed between -1 and 1 per-unit */						\
	v.WrHat=_IQsat(v.WrHat,_IQ21(1),_IQ21(-1));									\
	v.WrHat = _IQ21toIQ(v.WrHat);												\
																				\
/* Q0 = Q0*GLOBAL_Q => _IQXmpy(), X = GLOBAL_Q */								\
	v.WrHatRpm = _IQmpy(v.BaseRpm,v.WrHat);	

#endif // __ACI_SE_H__