AN1914 Freescale Semiconductor / Motorola, AN1914 Datasheet - Page 36

• Manufacturer Part Number: AN1914
• Description: 3-Phase BLDC Motor Control with Sensorless Back EMF Zero Crossing Detection Using DSP56F80x
• Manufacturer: Freescale Semiconductor / Motorola

SW Design
36
Protection processes are shown in
DC-Bus Current
I_Dc_Bus
(A/D)
Current PI Controller
Process
Cmd_Application
DSP56F80x MC PWM Module in Motor Control Applications
Omega_Required_Mech
Freescale Semiconductor, Inc.
Manual Speed
Setting
For More Information On This Product,
PVAL0,PVAL1
U_Desired
Figure 7-3. Data Flow - Part 1
Figure 7-4
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Omega_Desired_Mech
Application
State Machine
Process
Master
Speed PI Controller
and described in the following sub-sections.
PC
PVAL2,PVAL3
ApplicationMode
PWM Generation
Process
Process
Omega_Actual_Mech
START/STOP
Switch
Cmt_Drv_RqFlag
Status_Commutation
BldcMode
Step_Cmt,
PVAL4,PVAL5
Commutation Control
BEMF Zero Crossing
Process
Comparators