| 摘要 |
PROBLEM TO BE SOLVED: To reduce cost by eliminating a need for a wiring for a sensor itself for magnetic pole position detection, a power supply of the same, an output, and such.SOLUTION: The control method of a brushless DC motor, including: a stator 10 around which an excitation coil 20 is wound; a rotor 30, housed in the stator 10, rotatable in a predetermined direction; two pairs of magnets (41a, 41b), (42a, 42b) fixed on an inner surface of the stator 10 with a predetermined interval in a circumferential direction so that different poles face with each other about a center of a rotation axis of the rotor 30, includes: before driving by alternately applying bidirectional voltages, applying a voltage once in a predetermined direction at a startup time; and stopping to apply a voltage to move the rotor 30 to an initial position. |
