Sensorless BLDC motor and a manufacturing method thereof

Electricity: motive power systems – Switched reluctance motor commutation control

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318439, H02P 618

Patent

active

058864857

ABSTRACT:
Disclosed is a control system for detecting a rotor position in a sensorless brushless direct-current (BLDC) motor including a switching element for changing current flow direction between each phase and for performing a switching operation; a dividing circuit for dividing counter-electromotive force generated in an open phase when the switching element is operating; and an A/D converter for converting analogue values of the dividing circuit into digital values.

REFERENCES:
patent: 5134349 (1992-07-01), Kruse
patent: 5635810 (1997-06-01), Goel

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