Freescale Semiconductor, Inc.

Freescale Semiconductor, Inc.

Software Design

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 3.3.1.5

Starting — Commutation Time Calculation.

Measurements Handler

As explained in Scheduler and Over-Current Detection, the dc-bus current is scanned and over-current condition is evaluated. Where there is an over-current, the control enters the fault state (see Fault 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.

Designer Reference Manual

 

DRM028 — Rev 0

 

 

 

96

Software Design

MOTOROLA

 

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Go to: www.freescale.com

 

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Motorola M68HC08 manual Freescale Semiconductor, Inc