Stator coil heating apparatus and stator coil heating method

摘要

A stator coil heating apparatus and a stator coil heating method that are capable of effectively preventing a core from thermal deformation particularly caused due to a magnetic flux generated by a coil head, without the problem of heating temperature variation, and also shortening a time for the process of heating a stator coil, are provided.;A stator coil heating apparatus A to heat a stator coil L wound around a circular core F, comprises: induction heating coil heads 1 and 11 that heat the circular coil L by generating an inductive effect acting from outside in the thickness direction of the core F, against circular winding coil bases La and Lb that are sticking out of end faces Fa and Fb of the core F in the thickness direction thereof; and shields 2 and 12 that block a magnetic flux generated by the coil heads 1 and 11, out of the end faces Fa and Fb of the core F in the thickness direction thereof.

主权项

1. A stator coil heating apparatus for heating a stator coil wound around an inner circumference of a circular core, the circular core extending along an axial direction, the stator coil heating apparatus comprising:
a high-frequency induction heating portion configured to heat the stator coil and the circular core, the high-frequency induction heating portion including a high-frequency induction heating coil head configured to fit within a central opening of the circular core; the high-frequency induction heating portion further comprising a shield positioned coaxially with the circular core, outside of the circular core, at each of the end faces of the circular core in the axial direction while the high-frequency induction heating coil head is within the central opening of the circular core; and the shield being configured to block a magnetic flux generated by the coil head, from an outer circumference area of the circular core in the axial direction while the high-frequency induction heating coil head is within the central opening of the circular core, wherein the shield is positionable separately from the stator coil and the circular core, the shield is cylindrical or donut-shaped with an opening in the center thereof large enough to allow the high-frequency induction heating coil head to pass therethrough, and the high-frequency induction heating portion is configured to directly heat the stator coil.