| 20100270960 | METHOD AND CIRCUIT FOR PRODUCING ROTOR POSITION SIGNALS AND FOR THE COMMUTATION OF BRUSHLESS DIRECT-CURRENT MOTORS, WITHOUT USING SENSORS - 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. | 10-28-2010 |
