Transcription of AN857 Brushless DC Motor Control Made Easy App. Note
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AN857 Brushless DC Motor Control Made Easy App. Note
2002-2011 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 PIC microcontroller, in con-jucntion with the In-Circuit Debugger (ICD). This com-bination was chosen because the ICD is inexpensive,and code can be debugged in the prototype hardwarewithout need for an extra programmer or emulator.
AN857 DS00857B-page 4 2002-2011 Microchip Technology Inc. TABLE 1: CW SENSOR AND DRIVE BITS BY PHASE ORDER Sorting Table 1 by sensor code binary weight results in Table 2 .
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