| 摘要 |
PROBLEM TO BE SOLVED: To provide a brushless motor that can make it hard for a field magnet to be demagnetized (irreversible temperature change) even if the temperature gets high inside a vehicle engine room.SOLUTION: A brushless motor 11 for a valve timing variable device 3 comprises a rotor of which first unguiform magnetic poles 31b function as first magnetic poles and second unguiform magnetic poles function as second magnetic poles by placing an annular magnet 33 magnetized in an axial direction between axial directions of a first rotor core 31 in which the multiple first unguiform magnetic poles 31b are formed in a circumferential direction and a second rotor core 32 in which the multiple second unguiform magnetic poles are formed in a circumferential direction. |
