Patent ID: 7202580

Claim:
A permanent magnet type motor comprising: a ring shaped rotor main body which is rotatably supported with respect to a stationary member; a rotor which is provided on an outer periphery face of the rotor main body and which is arranged such that S poles and N poles of a plurality of permanent magnets are provided alternately; a stator composed of a stator core arranged at the outer periphery side or inner periphery side of the rotor, the stator core having winding storage portions, and stator windings stored in the winding storage portions; a detection target body mounted directly or via a mount member on an end face in an axial direction of the rotor main body, the detection target body having a magnetic pole position detecting portion and a rotational position detecting portion; a first sensor arranged in proximity to the magnetic pole position detecting portion of the detection target body, the first sensor detecting a magnetic pole position; and a second sensor arranged in proximity to the magnetic pole position detecting portion of the detection target body, the second sensor detecting a rotational position of the rotor main body, wherein the magnetic pole position detecting portion of the detection target body includes an irregular portion formed on an outer periphery edge thereof, and the rotational position detecting portion includes a plurality of slits or a plurality of holes periodically formed along a circle drawn at an inner part of the detection target body concentrically.