Brushless DC Motor Control Made Easy

2002 Microchip Technology 1AN857 INTRODUCTIONThis application note discusses the steps of developingseveral controllers for Brushless motors. We cover sen-sored, sensorless, open loop, and closed loop is even a controller with independent voltage andspeed controls so you can discover your Motor s char-acteristics code in this application note was developed withthe Microchip PIC16F877 PICmicro Microcontroller, inconjuction with the In-Circuit Debugger (ICD). Thiscombination was chosen because the ICD is inexpen-sive, and code can be debugged in the prototype hard-ware without need for an extra programmer oremulator. As the design develops, we program the tar-get device and exercise the code directly from theMPLAB environment. The final code can then beported to one of the smaller, less expensive, PICmicro microcontrollers.

control the six motor drive MOSFETS. Each sensor requires one pin, so three pins of PORTE will be used to read the current state of the motor’s three-output sensor. The sensor state will be linked to the drive state by using the sensor input code as a binary offset to the drive table index. The sensor states and motor drive

Loading..

Tags:

  Control, Motor, Motor control

Information

Related search queries