Stator wedge for an electric machine
First Claim
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1. An electric machine comprising:
- a stator core comprising;
a central opening and a plurality of teeth facing inwardly toward the central opening; and
slots defined between pairs of adjacent teeth;
a rotor extending through the central opening;
a gap between the stator core and the rotor;
coils extending through the slots; and
wedges disposed in the slots, each wedge including;
a first part abutting at least one of the coils;
a second part;
a shim between the first part and the second part; and
wherein the wedge has a C-shaped cross-section having an open end open towards the central opening.
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Abstract
Electric machines with, and related methods for, improved fluid flow through the electric machines are disclosed. According to some implementations, an electric machine may include a central opening and a plurality of teeth facing inwardly toward the central opening. Slots may be defined between adjacent teeth, and a wedge may be disposed in one or more of the slots, partitioning the slots into a coils portion and an open portion. A gap may be defined between the stator core and the rotor. A fluid flow path defined from the gap and the open portions of the slots provide for improved fluid flow through the electric machine. Wedges disposed in the slots to maintain the coils into a packed state.
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Citations
14 Claims
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1. An electric machine comprising:
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a stator core comprising; a central opening and a plurality of teeth facing inwardly toward the central opening; and slots defined between pairs of adjacent teeth; a rotor extending through the central opening; a gap between the stator core and the rotor; coils extending through the slots; and wedges disposed in the slots, each wedge including; a first part abutting at least one of the coils; a second part; a shim between the first part and the second part; and wherein the wedge has a C-shaped cross-section having an open end open towards the central opening. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An electric machine comprising:
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a stator core comprising; a central opening; and a plurality of slots defined between adjacent teeth; a rotor extending through the central opening; coils extending through the slots; wedges disposed in the slots, each wedge having; a top surface abutting at least one of the coils; a width that tapers from the top surface toward the central opening; a cross-section that defines an axial flow channel through the wedge; and wherein the wedge has a C-shaped cross-section with an open end of the C-shape in communication with the gap between the stator core and the rotor; and a wedge retaining ring engaging the wedge, encircling the central opening of the stator core and retaining the wedge to the stator core. - View Dependent Claims (9, 10, 11, 12, 13)
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14. An electric machine comprising:
a stator core comprising; a central opening; and a plurality of slots defined between adjacent teeth; a rotor extending through the central opening; coils extending through the slots; wedges disposed in the slots, each wedge having; a top surface abutting at least one of the coils; a width that tapers from the top surface toward the central opening; and a cross-section that defines an axial flow channel through the wedge; and a wedge retaining ring engaging the wedge, encircling the central opening of the stator core and retaining the wedge to the stator core, and wherein the wedge retaining ring comprises a slot that receives and interlocks with an end of the wedge.
Specification