Electric rotating machine
View Patent ↗An electric rotating machine comprises: a stator; a rotor that includes a rotary shaft, and rotates coaxially with the stator; a bracket supporting and fixing the stator, and supporting rotatably the rotary shaft; a rotational position detector disposed on the side opposite to the load of the rotary shaft to detect a rotational position of the rotor; and a power part including a switching element disposed on the outer circumferential side of the rotational position detector. A shield member is disposed at the rotational position detector to cover the circumference and shield a magnetic field generated by the switching element.
1. An electric rotating machine comprising:
a stator;
a rotor fixed to a rotary shaft that rotates coaxially with said stator;
a stator winding mounted on said stator;
a rotor winding mounted on said rotor;
a bracket that supports and fixes said stator and that supports said rotary shaft so as to be capable of rotating;
a rotational position detector that is disposed on one end side of said rotary shaft to detect a rotational position of said rotor;
a shield member, that covers the circumference of the rotational positional detector and that shields an external magnetic field, mounted onto said bracket; and
a switching element part, that controls current to be supplied to sail stator winding or said rotor winding, disposed outside of said shield member and mounted onto said bracket;
wherein said switching element part generates said external magnetic field.
2. The electric rotating machine according to claim 1 , wherein said rotational position detector and said switching element part are disposed axially spaced apart.
3. The electric rotating machine according to claim 1 , wherein a substantially cylindrical or a substantially prismatic space is formed with said rotary shaft centered between said rotational position detector and said switching element part; and said shield member is disposed in said space.
4. The electric rotating machine according to claim 1 , wherein said shield member is formed in a ring configuration so as to cover the entire circumference of said rotational position detector.
5. The electric rotating machine according to claim 1 , wherein said shield member has a structure in which a conductive material and an insulating material are radially laminated.
6. The electric rotating machine according to claim 1 , wherein said shield member is made of a soft magnetic substance, and mounted via a non-magnetic part on the inner circumferential side.
7. The electric rotating machine according to claim 1 , wherein said shield member is formed of a laminate of an iron-based soft magnetic substance in which an insulating layer is formed on the surface of a thin plate.
8. An electric rotating machine comprising: a stator; a rotor fixed to a rotary shaft that rotates coaxially with said stator; a bracket that supports and fixes said stator and that supports said rotary shaft so as to be capable of rotating; and a rotational position detector that is disposed on one end side of said rotary shaft to detect a rotational position of said rotor;
wherein a shield member that covers the circumference of the rotational positional detector and that shields an external magnetic field is mounted onto said bracket;
wherein a winding is mounted on said stator; a switching element part that controls current to be supplied to said winding is disposed outside of said shield member; and said switching element part generates said external magnetic field; and
wherein a substantially cylindrical or a substantially prismatic space is formed with said rotary shaft centered between said rotational position detector and said switching element part; and said shield member is disposed in said space.