| 摘要 |
PROBLEM TO BE SOLVED: To avoid the lock of a motor caused by control abnormality or the occurrence of eddy currents, at the time of noise having mixed in the signal from a position sensor utilizing a Hall element or the like. SOLUTION: In case that the combination (HALL-IC) of the output signals of three pieces of position sensors H1-H3 complies with the prescribed rules when viewed from the combination (HALL-IC-OLD) of the output signals obtained by the last interruption when this system performs the interruption for motor control at prescribed intervals so as to rotate a motor in the prescribed direction, this determines it to be normal, and applies voltage to each winding of the motor so that it may continue rotation (S54-S59). When the change of the combination of the output signals deviates from the prescribed rules, this determines it to be abnormal, and stops the voltage application to the motor (S53). |
