Rotary electric machine
A tooth of a stator is divided into two tooth segments, and an inter-segment gap is formed between the segments. The inter-segment gap is open toward a slot which is a space between adjacent teeth. A cooling fluid is sent to the inter-segment gap from an in-rotor-core flow channel of a rotor core, and the sent cooling fluid directly contacts and cools a coil conductor wiring in the slot.
1. A rotary electric machine comprising:
a rotor shaft that defines a rotational axis, and in which an in-shaft flow channel is formed which is opened on an outer circumferential surface of the rotor shaft and through which a cooling fluid is sent;
a rotor core through a center of which the rotor shaft passes, and in which an in-rotor-core flow channel is formed having an inner end opposing the opening of the in-shaft flow channel and an outer end opened on an outer circumferential surface of the rotor core; and
a stator core that has a yoke having a circular ring shape or a circular tube shape, and teeth arranged on an inner circumferential surface of the yoke with a spacing therebetween in a circumferential direction, and that is placed to surround an outer circumference of the rotor core,
wherein each of the teeth is divided with a gap between divided segments at a position opposing the outer end of the in-rotor-core flow channel such that an opening of the gap on an inner circumferential side is larger along the rotational axis than the outer end of the in-rotor-core flow channel,
wherein in a cross-section perpendicular to the rotational axis, a cross-sectional shape of the gap between the divided segments is identical to a cross-sectional shape of the tooth, and the gap has a constant thickness along the rotational axis, and
wherein the teeth are arranged along the inner circumferential surface of the yoke such that the gaps of the teeth are surrounded by the yoke.
2. The rotary electric machine according to claim 1 , wherein, in the yoke, an in-yoke flow channel is formed having an inner end opened on the gap of divided portions of the tooth, and an outer end opened on an outer circumferential surface of the yoke.
3. The rotary electric machine according to claim 1 , wherein the tooth is divided at a center part in a direction along the rotational axis.
4. The rotary electric machine according to claim 1 , wherein the tooth is divided at a center part in a direction along the rotational axis.