资料介绍
In 2002, I wrote my first application note on brushless
motor control, AN857, which described the operation of
sensored and sensorless brushless motors. The basic
motor operation concepts described in that application
note still apply today, therefore, I will not repeat them
here. In the time since then, enhancements to two of
the microcontroller peripherals have been made that
dramatically improve the microcontroller capabilities for
sensorless motor control applications. This application
note will describe those enhancements and how they
are used to create a sensorless motor control solution
with an 8 MHz PIC16FXXX device that has truly stellar
performance with seamless operation from 100 RPM to
over 90,000 RPM.
AN1305
Sensorless 3-Phase Brushless Motor Control with the PIC16FXXX
Author: Ward Brown
TYPICAL MOTOR CONNECTION
Microchip Technology Inc. Figure 1 is a simplified block diagram of how a
sensorless, 3-phase brushless motor is configured with
the drive and control circuitry. Each phase of the motor
OVERVIEW is connected to three circuits:
In 2002, I wrote my first application note on brushles
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