| 摘要 |
<p>PURPOSE:To provide a brushless motor, in which excitation frequency is decreased at the time of high-speed revolution, the driving efficiency of a control circuit can be improved while the generation of iron loss or copper loss is prevented and a temperature rise can be reduced. CONSTITUTION:When the number of poles of a field magnet 51a is 2n ((n) represents a positive integer), coreless armature coils 52a-52f are disposed in 3n number, and the open angles of the armature coils 52a-52f are set at (360/3n) deg.. A notch section 54a is formed to the outer circumferential section of the magnet 51a, a recessed section is formed by the notch section 54a and the inner circumferential section of a yoke, and a groove for correcting balance at a time when the field magnet 51a and a body of revolution are rotated is constituted. A housing and a harness 55 are connected electrically to a printed board 54, and the housing is grounded through the harness 55 and a harness for a power supply.</p> |
