| 摘要 |
A start-up routine for a multiphase brushless DC motor having one or more rotor position sensors insufficient to provide for an angular resolution as high as the angular resolution of the synchronized driving system of the motor, consists in: a) fixing of at least an angular check zone of a certain arc length angularly corr lated to the position of said sensor or sensors; b) assessing or presuming a certain initial rest position of the rotor; c) exciting for fixed time intervals the phase windings in a sequence such to rotate the rotor toward an angular position next to the initial position, in the desired direction, while masking the signals or digital codes of the position sensor or sensors for a preestablished masking time; d) repeating step c) until verifying that the excited phases are those commanding advancement of the rotor toward said angular check zone, or a change of state of the signals of said position sensor or sensors, if the masking time has elapsed; e) associating to each code of said position sensor or sensors a new angular check zone to be reached by repeating the sequence of operations starting from step c). <IMAGE> |
