Transcription of 3-Phase BLDC Motor Control with Sensorless Back EMF Zero ...
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3-Phase BLDC Motor Control with Sensorless Back EMF Zero ...
Freescale SemiconductorApplication NoteAN1914 Rev. 1, 11/2005 Freescale Semiconductor, Inc., 2001, 2005. All rights BLDC Motor Control with Sensorless Back EMF Zero Crossing Detection Using 56F80x Design of 3-Phase BLDC Motor Control Application Based on the Software Development Kit Libor Prokop, Leos Chalupa1. IntroductionThis Application Note describes the design of a 3-Phase Sensorless BLDC Motor drive with Back-EMF Zero Crossing. It is based on Freescale s 56F80x family dedicated for Motor Control applications. The concept of the application is that of a speed-closed loop drive using Back-EMF Zero Crossing technique for position detection.
Three phase Brushless DC (BLDC) motors are good candidates because of their high efficiency capability and easy to drive features. The disadvantage of this kind of motor is the fact that commutation of motor phases relies on its rotor position. Although the rotor position is usually sensed by sensors, there are applications that
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