Electric machine and method for manufacturing it

摘要

A method for making a rotary electric machine comprises the steps of: preparing a core (18) having a plurality of pole expansions and a plurality of windings (100, 200, 300) made of electrically conductive material on the pole expansions, where at least a part of the windings (100, 200, 300) is made from a conductor wire having a free end (14) that can be connected electrically to a mains power supply; stably coupling to each other at least two free ends (14) of different windings (100, 200, 300) so as to connect them to a single power supply terminal; twisting the coupled ends (14) together to form a single electrical termination (5, 6, 7) twisted along a principal line of extension of the electrical termination (5, 6, 7).

主权项

1. A method for making a rotary electric machine comprising the steps of:
preparing a core having a plurality of pole expansions and a plurality of windings made of electrically conductive material, each of said windings having at least one respective lead and being made on the pole expansions, at least a part of the windings being made from a conductor wire having a free end that can be connected electrically to a mains power supply; the method wherein it comprises the steps of
placing the leads in a plane substantially perpendicular to the axis (R) of rotation of the electric machine;deforming the leads to define, in the windings, a flexible portion that can be moved towards the core and away from the core, the method further comprising the steps of stably coupling to each other at least two free ends of different windings; twisting the coupled ends together to form a single electrical termination twisted along a principal line of extension of the electrical termination, this twisting step being accomplished by:
placing the ends side by side and substantially in line with each other;gripping the ends simultaneously; andholding the ends together and turning them about an axis substantially parallel to a principal axis of extension of the ends in such a way as to twist the ends round each other, the step of placing the ends side by side being accomplished by positioning the ends so they lie in a first plane, the step of twisting the ends round each other being preceded by a step of positioning the ends in a second plane substantially perpendicular to the first plane in such a way that the electrical termination made by twisting the ends lies in the second plane, the method comprising the step of preparing a reference structure, the step of placing the ends side by side being accomplished by positioning the ends on opposite sides of the reference structure, so that the subsequent turning action on the ends causes twisting of only the terminal portion of the ends extending away from the reference structure, the step of preparing a reference structure comprising a step of preparing a reference structure that extends along a profile that changes direction at least once in such a way that the ends can be drawn continuously around the reference structure during the passage of the ends from the first plane to the second plane.