AN1931D Freescale Semiconductor / Motorola, AN1931D Datasheet - Page 39

• Manufacturer Part Number: AN1931D
• Description: 3-Phase PM Synchronous Motor Vector Control
• Manufacturer: Freescale Semiconductor / Motorola

MOTOROLA
coefBEMF, coefBEMFShift
omega_actual_mech
The Feed Forward process provides the following calculations:
u_LimitF16
i_SDQ_desired.q_axis
u_SDQ.q_axis
Figure 6-7. Data Flow - PMSM Control - Current Control
sinCos_theta_el
pwmABC
=
coefBEMF 2
Freescale Semiconductor, Inc.
3-Phase PM Synchronous Motor Vector Control
Voltage Transformation
i_Sabc_comp
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i_SDQ.q_axis
u_SDQ.d_axis
u_SDQ_lin.q_axis
d-q -> alpha, beta
Regulator
Compensation
Current q
DCBus Ripple
Space Vector
u_Salpha_RipElim
Current Transformation
Modulation
u_SAlphaBeta
coefBEMFShft
Scaling
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a,b,c -> d-q
Feed Forward
=
u_SDQ_lin.d_axis
omega_actual_mech
i_SDQ.d_axis
u_SDQ
svmSector
u_SDQ_lin.d_axis
Regulator
Current d
sinCos_theta_el
u_dc_bus_filt
+
u_SDQ_lin.q_axis
i_SDQ_desired.d_axis
u_LimitF16
SVM_INV_INDEX/2*
*u_dc_bus_filt +
+u_OverMax
SVM_INV_INDEX,
I_SDQ_MAX_F16
pmsmCtrlStatus
u_OverMax
Software Design
(EQ 6-1.)
(EQ 6-2.)
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