Rotor for an externally excited synchronous machine
A star disc has integrated current busbars for the interconnecting of rotor windings. A rotor may comprise the star disc, and a method may comprise producing the rotor.
1. A star disc for a rotor of an externally excited synchronous machine, comprising:
a surface of the star disc that is formed of plastic, in which current busbars are embedded,
the current busbars connecting in electrically conductive manner a pole shoe or a groove of the star disc to an adjacent pole shoe or an adjacent groove of the star disc, and
the current busbars extending to a radially outward free end of a respective pole of the star disc opposite a base end of the pole and including, at their two ends respectively, a contacting element to receive a winding wire protruding from the surface of the star disc.
2. The star disc according to claim 1 , wherein the current busbars are embedded by injection molding in the star disc.
3. The star disc according to claim 1 , wherein the poles of the star disc comprise support structures for guiding and bracing of a winding wire.
4. The star disc according to claim 1 , wherein at least one current busbar leads from the pole shoe of at least one pole to a yoke of the star disc adjacent to the pole.
5. The star disc according to claim 1 , wherein at least one current busbar leads from the pole shoe of at least one pole to the pole shoe of a pole of the star disc which is clockwise adjacent to the pole.
6. The star disc according to claim 1 , wherein at least one current busbar leads from the foot of at least one pole to the foot of a clockwise adjacent pole of the star disc.
7. The star disc according to claim 1 , wherein the current busbars are arranged such that they allow a winding of all poles with the same direction of rotation and at the same time make possible parallel current directions in the grooves of the star disc.
8. A rotor of an externally excited synchronous machine, comprising:
two star discs, which are arranged on a rotor axis at opposite end faces of a laminated stack of the rotor,
wherein at least one of the two star discs is a star disc including:
a surface of the star disc that is formed of plastic, in which current busbars are embedded,
the current busbars connecting in electrically conductive manner a pole shoe or a groove of the star disc to an adjacent pole shoe or an adjacent groove of the star disc, and
the current busbars extending to a radially outward free end of a respective pole of the star disc opposite a base end of the pole and including, at their two ends respectively, a contacting element to receive a winding wire protruding from the surface of the star disc.
9. A method for producing a rotor of an externally excited synchronous machine, comprising:
arranging two star discs at opposite end faces of a laminated stack of the rotor, and
winding the poles of the star discs and the laminated stacks with a winding wire to form a trapezoidally orthocyclic winding,
wherein at least one of the two star discs is a star disc including:
a surface of the star disc that is formed of plastic, in which current busbars are embedded;
the current busbars connecting in electrically conductive manner a pole shoe or a groove of the star disc to an adjacent pole shoe or an adjacent groove of the star disc, and
the current busbars extending to a radially outward free end of a respective pole of the star disc opposite a base end of the pole and including, at their two ends respectively, a contacting element to receive a winding wire protruding from the surface of the star disc.
10. The method according to claim 9 , in which multiple poles of the rotor are wound at the same time and in the same winding direction.