AN1931D Freescale Semiconductor / Motorola, AN1931D Datasheet - Page 31
AN1931D
Manufacturer Part Number
AN1931D
Description
3-Phase PM Synchronous Motor Vector Control
Manufacturer
Freescale Semiconductor / Motorola
Datasheet
1.AN1931D.pdf
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Freescale Semiconductor, Inc.
Software Design
Position and Speed Measurement processes are provided by hardware Timer modules and the
functions giving the actual speed and position; see
Figure
4.3.1.
LED Indication Processing is called from Quadrature Timer D0 Interrupt, which provides the time
base for LED flashing.
The Fault Control process is split into Background and PWM Fault ISR. Background (see
Figure
6-1)
checks the Overheating, Undervoltage and Position Sensing Faults. The PWM Fault ISR part (see
Figure
6-2) takes care of Overvoltage and Overcurrent Faults, which causes a PWM A Fault interrupt.
The Brake Control process is dedicated to the brake transistor control, which maintains the DCBus
voltage level. It is called from Main (see
Figure
6-1).
The Up/Down Button and Switch Control processes are subprocesses of Application Control and are
described in
Section
7.4.
The Up/Down Button processes are split into Button Processing Interrupt, called from Quadrature
Timer D0 Interrupt (see
Figure
6-3); Button Processing BackGround (inside Analog Sensing);
Interrupt Up Button; and Interrupt Down Button (see
Figure
6-2).
MOTOROLA
3-Phase PM Synchronous Motor Vector Control
31
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