Winding piece and electric machine having such a winding piece
The invention relates to a winding piece ( 1 ), in particular in the shape of a hairpin, which is provided to be inserted into the grooves ( 7 ) of an electrical machine, comprising two limbs ( 2 ) and a curved transition region ( 3 ), which connects the two limbs ( 2 ) to each other. According to the invention, the limbs ( 2 ) each have a first portion ( 4 ) having a profile, which is adjusted to the cross-section of the groove ( 7 ), and an end portion ( 5 ), which has a round profile, wherein the winding piece ( 1 ) is formed as a hollow conductor, which has a penetrating channel ( 9 ), through which a coolant can be led.
1. A winding piece that is provided to be inserted into one or more grooves of an electrical machine, wherein the winding piece is formed as a hollow conductor having a continuous channel, through which a coolant can be led, wherein the winding piece has a first portion having a rectangular profile and two end portions having a round profile.
2. The winding piece of claim 1 , wherein the winding piece is formed in the shape of a hairpin.
3. The winding piece according to claim 1 , wherein the winding piece is produced from copper, aluminum or an alloy of copper and aluminum.
4. The electrical machine of claim 1 having an electrical winding for generating an electromagnetic field, wherein the electrical winding comprises several winding pieces.
5. The electrical machine according to claim 4 , wherein the winding pieces are connected to one another via one or more connection elements.
6. The electrical machine according to claim 5 , wherein the connection elements are formed to be tubular and each connection element has a round inner cross-section on two ends thereof which is adjusted to the round profile of the two end portions of the winding pieces.
7. The electrical machine according to claim 5 , wherein the connection elements are curved in the shape of arcs.