Hairpin winding electric machine
AssigneeFord Global Technologies, LLC
InventorAdeeb Ahmed
Life of this patent
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Abstract
A three-phase electric machine includes a stator core defining slots, a terminal associated with one of the three phases, and a neutral. A first phase of hairpin windings is disposed in the core and has first and second parallel paths that are each continuous between the terminal and the neutral. The first path includes a first hairpin having a first leg disposed in a first of the slots and a second leg disposed in a second of the slots that is five slots away from the first slot. The first path further includes a second hairpin having a first leg disposed in a third of the slots and a second leg disposed in the second slot, wherein the second slot is seven slots away from the third slot.
Claims20
An electric machine comprising:
- a stator core defining slots;
- and
- windings disposed in the core and arranged in three phases each having at least one path including hairpins interconnected to form a continuous circuit between a terminal and a neutral, wherein the hairpins of each path include:
- a first type of hairpins (first hairpins) each having a first leg, a second leg, a crown connecting between the legs, an outwardly extending twist joined to the first leg, and an inwardly extending twist joined to the second leg, wherein the legs are spaced apart by a span of five slots, and
- a second type of hairpins (second hairpins) each having a first leg, a second leg, a crown connecting between the legs, an inwardly extending twist joined to the first leg, and an outwardly extending twist joined to the second leg, wherein the legs are spaced apart by a span of seven slots;
- wherein
- at least one of the slots only has one of the phases disposed therein, and at least one of the slots has two of the phases disposed therein.
An electric machine having three phases comprising:
- a stator core defining slots;
- a terminal associated with one of the three phases;
- a neutral;
- and
- a first phase of hairpin windings disposed in the core and having first and second parallel paths that are each continuous between the terminal and the neutral;
- wherein
- the first path includes a first hairpin having a first leg disposed in a first of the slots and a second leg disposed in a second of the slots that is five slots away from the first slot, and a second hairpin having a first leg disposed in a third of the slots and a second leg disposed in the second slot, wherein the second slot is seven slots away from the third slot.
An electric machine comprising:
- a stator core defining slots having a plurality of radial pin positions, the pin positions including an inner position nearest an inner diameter of the core, an outer position nearest an outer diameter of the core, and one or more intermediate positions;
- hairpins configured to be received in the slots and including:
- a first type of hairpins (first hairpins) each having a first leg, a second leg, a crown connecting between the legs, an outwardly extending twist joined to the first leg, and an inwardly extending twist joined to the second leg, wherein the legs are spaced apart by a span of five slots,
- a second type of hairpins (second hairpins) each having a first leg, a second leg, a crown connecting between the legs, an inwardly extending twist joined to the first leg, and an outwardly extending twist joined to the second leg, wherein the legs are spaced apart by a span of seven slots,
- a third type of hairpins (third hairpins) each having a first leg, a second leg spaced apart from the first leg by a span of six slots, a crown connecting between the legs, a first twist joined to the first leg and having a span of three slots, and a second twist joined to the second leg and having a span of 3.5 slots, and
- a fourth type of hairpins (fourth hairpins) each having a first leg, a second leg spaced apart from the first leg by a span of six slots, a crown connecting between the legs, a first twist joined to the first leg and having a span of 3.5 slots, and a second twist joined to the second leg and having a span of three slots;
- and
- a winding formed by interconnecting select ones of the hairpins to form three phases arranged in double layer with half of the slots containing only one of the phases and the other half of the slots containing two of the phases, each of the phases having first and second parallel paths extending between a terminal and a neutral.
Dependencies are inferred from the claim text.