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US 2024/0266933 A1Published application
Rotor for synchronous electric machine
AssigneeFord Global Technologies, LLC
InventorsWei Wu, Dexiang Dallis Sun, Devan James Anderson
Life of this patent
Estimating the term…
Abstract
A permanent magnet synchronous motor includes a shaft with an integrally formed flange and resolver rotor. The resolver rotor is formed by machining a set of cutouts in the flange. The rotor body, which includes the permanent magnets, is assembled onto the shaft from the end of the shaft opposite the flange and resolver rotor. Features, such as keyways on the shaft and keys on the rotor body establish a rotational position relationship between the shaft and the permanent magnets.
Claims16
A traction motor comprising:
- a stator;
- a shaft supported for rotation with respect to the stator, the shaft having a fixed flange defining radial cutouts, the shaft having an end section with a maximum diameter;
- a rotor body rotationally fixed to the shaft axially abutting the flange at a first end and axially overlapping the end section at a second end, the rotor body having a set of permanent magnets at predefined circumferential positions with respect to the cutouts, the rotor body having an inside diameter no less than the maximum diameter of the end section;
- and
- a sensor fixed to the stator and configured to produce a signal indicating a rotational position of the shaft with respect to the stator based on the position of the cutouts.
2 more elements
A rotor assembly comprising:
- a shaft having a fixed flange, the flange defining radial cutouts configured to interact with a non-rotating resolver sensor such that the resolver sensor produces a signal indicating a rotational position, the shaft further having an end section with a maximum diameter;
- and
- a rotor body rotationally fixed to the shaft axially abutting the flange at a first end and overlapping the end section at a second end, the rotor body having an inside diameter no less than the maximum diameter of the end section.
A method of assembling a motor, comprising:
- forming a plurality of cutouts in a flange of a rotor shaft, the cutouts configured to interact with a non-rotating resolver sensor such that the resolver sensor produces a signal indicating a rotational position of the shaft;
- and
- inserting a rotor body onto the shaft such that the rotor body axially abuts the flange.
Dependencies are inferred from the claim text.