Motorola M68HC08 - Manual (Page 13)

DRM028 — Rev 0 Designer Reference Manual
MOTOROLA Introduction 13
Designer Reference Manual — Sensorless BLDC Motor Control
Section 1. Introduction
1.1 Contents
1.2 Application Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
1.3 Benefits of the Solution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
1.2 Application Functionality
This Reference Design describes the design of a low-cost sensorless
3-phase brushless dc (BLDC) motor control with back-EMF
(electromotive force) zero-crossing sensing. It is based on Motorola’s
MC68HC908MR32 microcontroller which is dedicated for motor control
applications. The system is designed as a motor drive system for
medium power three phase BLDC motors and is targeted for
applications in automotive, industrial and appliance fields (e.g.
compressors, air conditioning units, pumps or simple industrial drives).
The reference design incorporates both hardware and software parts of
the system including hardware schematics.
1.3 Benefits of the Solution
The design of very low cost variable speed BLDC motor control drives
has become a prime focus point for the appliance designers and
semiconductor suppliers.
Today more and more variable speed drives are put in appliance or
automotive products to increase the whole system efficiency and the
product performance. Using of the control systems based on
semiconductor components and MCUs is mandatory to satisfy
requirements for high efficiency, performance and cost of the system.
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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