INTRODUCTION
This application note discusses the steps of developing
several controllers for brushless motors. We cover sensored,
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 characteristics
empirically.
The code in this application note was developed with
the Microchip PIC16F877 PICmicro® Microcontroller, in
conjuction with the In-Circuit Debugger (ICD). This
combination was chosen because the ICD is inexpensive,
and code can be debugged in the prototype hardware
without need for an extra programmer or
emulator. As the design develops, we program the tar