AN1913D Freescale Semiconductor / Motorola, AN1913D Datasheet - Page 35

• Manufacturer Part Number: AN1913D
• Description: 3-phase BLDC Motor Control with Sensorless Back-EMF ADC Zero Crossing Detection using DSP 56F80x
• Manufacturer: Freescale Semiconductor / Motorola

7.2 Data Flow
The control algorithm process values obtained from the user interface and sensors, generates 3-phase
PWM signals for motor control (as can be seen on the data flow analysis).
DC-Bus Current
I_Dc_Bus
(A/D)
Current PI Controller
Process
Cmd_Application
Omega_Required_Mech
BLDC control with BEMF Zero Crossing using ADC
Freescale Semiconductor, Inc.
Manual Speed
Setting
PVAL0,PVAL1
For More Information On This Product,
U_Desired
Figure 7-3. Data Flow - Part 1
Omega_Desired_Mech
Go to: www.freescale.com
State Machine
Application
Process
Master
Speed PI Controller
PC
PVAL2,PVAL3
ApplicationMode
PWM Generation
Process
Process
Omega_Actual_Mech
START/STOP
Switch
Status_Commutation
Cmt_Drv_RqFlag
Step_Cmt,
PVAL4,PVAL5
Commutation Control
Process
Software Design
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