Motorola M68HC08 Reference Manual page 96

Software Design
Designer Reference Manual
96
Freescale Semiconductor, Inc.
Second Commutation
The commutation time (T2) is calculated from the previous
commutation time and the start commutation period (Per_CmtStart).
This time is set to timer 2. Then, the new PWM multiplexer logic data
is readied for when the commutation interrupt performs the next
commutation.
The calculation of the commutation time is explained in
Starting — Commutation Time
Measurements Handler
As explained in Scheduler
current is scanned and over-current condition is evaluated. Where
there is an over-current, the control enters the fault state (see
State). The voltage and the speed commands are scanned too. When
this state is finished, the values of dc-bus current, dc-bus voltage, and
speed command are updated.
Software Design
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Calculation.
and Over-Current Detection, the dc-bus
3.3.1.5
Fault
DRM028 — Rev 0
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