Freescale Semiconductor, Inc.
Designer Reference Manual — 3-ph. ACIM Drive with DTC
Section 4. Software Design
4.1 Contents
4.2
4.3
4.4
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Data Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Algorithm of Dead Time Distortion Correction . . . . . . . . . . . . .43
4.2 Introduction
This section describes the design of the software blocks of the drive. The
software will be described in terms of -
• Software Data Flow
• Algorithm Dead Time Distortion Correction
4.3 Data Flow
The requirements of the drive dictate that software takes some values
from the user interface and sensors, processes them and generates
3-phase PWM signals for motor control.
The control algorithm of closed loop AC drive is described in Figure 4-1.
It consists of processes described in the following sub-sections. The
dead time distortion correction algorithm is described separately in the
successive section.
DRM019 — Rev 0
MOTOROLA
Designer Reference Manual
Software Design
37
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