Method and circuit for producing rotor position signals and for the commutation of brushless direct-current motors, without using sensors
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United States of America Patent
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Mar 27, 2012
Grant Date -
Oct 28, 2010
app pub date -
Nov 30, 2008
filing date -
Nov 30, 2007
priority date (Note) -
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Abstract
A method and a circuit are provided for the commutation of brushless direct-current motors (BLDC motors), without using sensors, and especially to a method and a circuit for producing rotor position signals, without using sensors, for the commutation of brushless direct-current motors. In the method and the circuit Hall sensor signals are emulated without sensors and rotor position signals free of disturbing pulses and with a correct phase position are generated from said signals. The rotor position signals can be used to carry out a reliable, sensor-free commutation.
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