Dynamo-electric machine and vehicle
A rotating electrical machine capable of achieving a high torque and low noise is provided. In a stator for a rotating electrical machine in which six or more slot conductors are inserted through one slot, the stator for a rotating electrical machine straddles slots such that a slot pitch of a jumper wire connecting round windings having different positions in a radial direction has at least two kinds or more different slot pitches.
1. A stator for a rotating electrical machine in which six or more slot conductors are inserted through one slot, the stator for a rotating electrical machine straddling slots such that a slot pitch of a jumper wire connecting round windings having different positions in a radial direction has at least two kinds or more different slot pitches, wherein
there are at least two jumper wires, and
a first jumper wire of the at least two jumper wires has a straddling amount of N+1 slot pitches and a second jumper wire of the at least two jumper wires has a straddling amount of {(N+1)±1} slot pitches, when N is defined as a number of slots per pole.
2. The stator for a rotating electrical machine according to claim 1 , the rotating electrical machine comprising
a plurality of slot conductor groups each group constituted by a plurality of winding conductors of an identical phase,
wherein the plurality of the winding conductors constituting the slot conductor group are inserted such that slots and layers are adjacent to each other inside a predetermined number of slots (Ns) continuously arranged in a circumferential direction of a stator core, and
when a number of slots per phase per pole is defined as NSPP and a number of the at least two jumper wires with the {(N+1)±1} slot pitches per phase is defined as 2×NJ, and
the predetermined number of slots (Ns) is set to satisfy an expression “Ns=NSPP+NJ”.
3. The stator for a rotating electrical machine according to claim 1 , comprising:
a plurality of slot conductor groups, each group constituted by a plurality of winding conductors corresponding to an identical phase,
wherein the plurality of the winding conductors constituting the slot conductor group are inserted such that slots and layers are adjacent to each other inside a predetermined number of slots (Ns) continuously arranged in a circumferential direction of a stator core, and
when a number of slots per phase per pole is defined as NSPP, a number of layers is defined as 2×NL, and a number of the at least two jumper wires with the {(N+1)±1} slot pitches per phase is defined as 2×NJ, the predetermined number of slots (Ns) is set to satisfy an expression “Ns=NSPP+NL−NJ”.
4. The stator for a rotating electrical machine according to claim 1 , wherein
the round winding is configured by connecting a plurality of segment conductors.
5. The stator for a rotating electrical machine according to claim 1 , wherein
the round winding is a flat rectangular wire.
6. The stator for a rotating electrical machine according to claim 1 , comprising
a plurality of three-phase Y connection wires having a plurality of the round windings,
wherein each of the plurality of three-phase Y connection wires has no phase difference in voltage induced in windings of the respective three-phase Y connection wires corresponding to an identical phase.
7. A vehicle comprising:
a rotating electrical machine having the stator for a rotating electrical machine according to claim 1 ;
a battery that supplies DC power; and
a conversion device that converts the DC power of the battery into AC power and supplies the converted power to the rotating electrical machine,
the vehicle using a torque of the rotating electrical machine as a driving force.