Abstract: A rotor for a rotary electric machine includes: a rotor core having a substantially annular shape centered on a rotation axis; and plural magnetic pole portions provided along a circumferential direction of the rotor core, each of the magnetic pole portions includes a magnet accommodating hole provided in the rotor core and extending in an axial direction, and at least one magnet accommodated in the magnet accommodating hole, the at least one magnet has a coercive force distribution in a predetermined direction, and the at least one magnet is accommodated in the magnet accommodating hole such that a direction of the coercive force distribution is the axial direction and a coercive force of an outer end, in the axial direction, of the at least one magnet is larger than a coercive force of an inner portion of the at least one magnet.

Abstract: A brushless resolver includes a rotor having a one-phase excitation coil and a stator having two-phase detection coils. The rotor is mounted to a shaft of a motor to detect a rotation angle of the motor. An induction coil is located around the shaft. The induction coil is connected to the excitation coil. Electromotive force induced in the induction coil by a change of magnetic flux of the motor, which passes through the shaft, is used as an excitation signal supplied to the excitation coil.

Abstract: A brushless resolver includes a rotor having a one-phase excitation coil and a stator having two-phase detection coils. The rotor is mounted to a shaft of a motor to detect a rotation angle of the motor. An induction coil is located around the shaft. The induction coil is connected to the excitation coil. Electromotive force induced in the induction coil by a change of magnetic flux of the motor, which passes through the shaft, is used as an excitation signal supplied to the excitation coil.