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Old Dec 01, 2003, 02:36 PM
jeffs555 is offline
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"Simplify, then add lightness"
Raleigh,NC
Joined Nov 2000
2,701 Posts
I just looked at the Microchip AN857 design, and their sensorless version gets its timing by sensing the back emf on only one phase. All the other designs I have looked at, sense back emf on all three phases. Does anyone have any experience with the microchip design? I am using a different processor, and not a pic, but it would make for a smaller/lighter design to eliminate emf sensing on two of the phases. Anyone have enough experience to know if this would effect performance or efficiency?

Jeff
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