文档介绍：3-Phase BLDC Motor Sensorless
Control using MC56F8013
Designer Reference Manual
56F801x
Hybrid Controller
DRM070
Rev. 0
5/2005
3-Phase BLDC Motor Sensorless Control using MC56F8013
Designer Reference Manual
by: Ozan Sadi Sihmanoglu
Freescale Czech Systems Laboratories
Roznov pod Radhostem, Czech Republic
To provide the most up-to-date information, the revision of our documents on the World Wide Web will be
the most current. Your printed copy may be an earlier revision. To verify that you have the latest
information available, refer to
3-Phase BLDC Motor Sensorless Control using MC56F8013, Rev. 0
Freescale Semiconductor 3
3-Phase BLDC Motor Sensorless Control using MC56F8013, Rev. 0
4 Freescale Semiconductor
Contents
Chapter 1
Introduction
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Pump, Fan pressor Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Why Sensorless Control?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Freescale Hybrid Controller Advantages and Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Chapter 2
Control Theory
The Brushless DC Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Power Stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Mathematical Description of the BLDC Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Power Stage — Motor System Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Mathematical Model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .