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无刷直流电机控制 AN857
资料介绍
无刷直流电机控制 AN857
部分文件列表
文件名 | 大小 |
无刷直流电机控制_AN857.pdf | 403K |
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(完整内容请下载后查看)AN857
Brushless DC Motor Control Made Easy
可以移植到更小更便宜的PIC控制器里
ment. The final code can then be ported to one of the
smaller, less expensive, PIC microcontrollers. The
porting takes minimal effort because the instruction set
Author:
Ward Brown
Microchip Technology Inc.
指令
is identical for all PIC 14-bit core devices.
完全相同的
INTRODUCTION
It should also be noted that the code was bench tested
This application note discusses the steps of developing
several controllers for brushless motors. We cover sen-
sored, sensorless, open-loop, and closed-loop design.
There is even a controller with independent voltage and
speed controls so you can discover your motor’s char-
and optimized for a Pittman N2311A011 brushless DC
motor. Other motors were also tested to assure that the
code was generally useful.
Anatomy of a BLDC
插图
实证
acteristics empirically.
Figure 1 is a simplified illustration of BLDC motor con-
struction. A brushless motor is constructed with a per-
manent magnet rotor and wire wound stator poles.
Electrical energy is converted to mechanical energy by
the magnetic attractive forces between the permanent
magnet rotor and a rotating magnetic field induced in
the wound stator poles.
The code in this application note was developed with
the Microchip PIC16F877 PIC® microcontroller, in con-
jucntion with the In-Circuit Debugger (ICD). This com-
bination was chosen because the ICD is inexpensive,廉价的
and code can be debugged in the prototype hardware
without need for an extra programmer or emulator. As
the design develops, we program the target device and
exercise the code directly from the MPLAB® environ-
FIGURE 1:
SIMPLIFIED BLDC MOTOR DIAGRAMS
100
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com
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c
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110
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4
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1
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com
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001
010
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com
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011
2002-2011 Microchip Technology Inc.
DS00857B-page 1
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