| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a brushless motor that can highly accurately perform motor control by reducing a magnetization pitch error of a rotor magnet and an installation error of a magnetic sensor, and by improving accuracy for detecting the magnetic pole position of a rotor. <P>SOLUTION: Six pieces of the magnetic sensors 31 to 36 are mounted to a wiring board 1, two pieces of them that are apart from each other at mechanical angles of 180° on a concentric circle form one pair, equiphase detection means 11 to 13 are constituted, the change of magnetic flux at the external periphery of the rotor magnet 3 is detected, an output of each equiphase detection means is inputted to an operation amplification circuit 5, and after equation processing by adding is applied to the output, the output is sent to a host control device 10, to detect a motor rotation position. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
