AN1931D Freescale Semiconductor / Motorola, AN1931D Datasheet - Page 45

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

MOTOROLA
6.3.4 Fault Control State Diagram
alignment state provides current control and timeout search. When alignment timeout occurs, End
Alignment is entered. In that state, the Position Sensing Zero Position is set, so the position sensor is
aligned with the real vector of the rotor flux. When the End Alignment state ends, the PMSM Control
enters a regular Run state, where the motor is running at the required speed. If the Application Control
state is set to Begin Stop or Begin Fault, the PMSM Control enters the Begin Stop or Fault, then the
Stop or Fault.
The state diagram of the Fault Control subprocess is illustrated in
the fault conditions are searched. If any fault occurs, the appFaultStatus variable is set according to
detected error; PWM is switched on (PWMEN bit = 0); the Fault state is entered. This state also causes
Application Control: Fault state. If the faults are successfully cleared, this is signaled to the
Application Control process. The Fault state is left when the Application Control Init state is entered.
Application Control: Init
Freescale Semiconductor, Inc.
Figure 6-11. State Diagram Fault Control
3-Phase PM Synchronous Motor Vector Control
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Application Control Begin Fault
setting of appFaultStatus
Application Initialization
clear appFaultStatus
DSP Initialization
pcb identification
searching faults
PWMEN bit = 0
clear/test faults
Fault Control:
Fault Control:
Fault Control:
Fault Control:
Fault Control:
Begin Fault
No Fault
Fault
Reset
done
done
Fault:
Undervoltage (filtered)
Overheating (filtered)
Overcurrent (fault pin)
Overvoltage (fault pin)
wrong PCB
Position Sensing fault
Figure
6-11. After the initialization,
Software Design
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