RESOLVER STATOR CLAMPING PLATE

A resolver assembly for an electric motor includes a housing, a resolver stator for an electric motor, and a clamping plate. The clamping plate includes a first radially extending portion fixed to the housing, a second radially extending portion pressing the resolver stator towards the housing, and an axially extending portion arranged axially between the first radially extending portion and the second radially extending portion. In an example embodiment, the clamping plate is elastically deformed. In an example embodiment, the resolver assembly includes a bolt extending through an orifice in the first radially extending portion radially outside of the axially extending portion to fix the clamping plate to the housing.

TECHNICAL FIELD

The present disclosure relates generally to a resolver for an electric motor, and more specifically to resolver stator clamping plate.

BACKGROUND

Resolvers are used to determine rotational position of electric motors. A resolver rotor rotates with a motor rotor and a resolver stator is rotationally fixed to a housing or other non-rotating component.

SUMMARY

Example aspects broadly comprise a resolver assembly for an electric motor including a housing, a resolver stator for an electric motor, and a clamping plate. The clamping plate includes a first radially extending portion fixed to the housing, a second radially extending portion pressing the resolver stator towards the housing, and an axially extending portion arranged axially between the first radially extending portion and the second radially extending portion. In an example embodiment, the clamping plate is elastically deformed. In an example embodiment, the resolver assembly includes a bolt extending through an orifice in the first radially extending portion radially outside of the axially extending portion to fix the clamping plate to the housing.

In an example embodiment, the clamping plate forms a complete ring surrounding an outer diameter of the resolver stator. In an example embodiment, the first radially extending portion is an annular disk and the axially extending portion is a tab extending from the annular disk radially outside an outer diameter of the resolver stator. In an example embodiment, the clamping plate includes a semicircular portion connecting a distal end of the axially extending portion, opposite the first radially extending portion, to the second radially extending portion.

In some example embodiments, the resolver stator includes a notch and the housing includes a tab disposed in the notch for positioning the resolver stator relative to the housing. In an example embodiment, the resolver stator is radially and circumferentially positioned by the tab in the notch.

In some example embodiments, the resolver assembly includes an electric motor and a resolver rotor. The electric motor includes a stator fixed to the housing and a rotor rotatable relative to the housing and the stator. The resolver rotor is radially aligned with the resolver stator and fixed to the rotor for corotation. In an example embodiment, the resolver assembly includes a bearing. The rotor includes a rotor carrier, the resolver rotor is fixed to the rotor carrier, and the bearing radially positions the rotor carrier relative to the housing.

DETAILED DESCRIPTION

Embodiments of the present disclosure are described herein. It should be appreciated that like drawing numbers appearing in different drawing views identify identical, or functionally similar, structural elements. Also, it is to be understood that the disclosed embodiments are merely examples and other embodiments can take various and alternative forms. The figures are not necessarily to scale; some features could be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the embodiments. As those of ordinary skill in the art will understand, various features illustrated and described with reference to any one of the figures can be combined with features illustrated in one or more other figures to produce embodiments that are not explicitly illustrated or described. The combinations of features illustrated provide representative embodiments for typical applications. Various combinations and modifications of the features consistent with the teachings of this disclosure, however, could be desired for particular applications or implementations.

The terminology used herein is for the purpose of describing particular aspects only, and is not intended to limit the scope of the present disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood to one of ordinary skill in the art to which this disclosure belongs. Although any methods, devices or materials similar or equivalent to those described herein can be used in the practice or testing of the disclosure, the following example methods, devices, and materials are now described.

The following description is made with reference to the single FIGURE. The single FIGURE illustrates a top-half cross-sectional view of a hybrid module according to an example aspect of the present disclosure. Hybrid module100includes resolver assembly102. The resolver assembly includes housing104, resolver stator106for electric motor108, and clamping plate110. The clamping plate includes radially extending portion112fixed to the housing, radially extending portion114pressing the resolver stator towards the housing, and axially extending portion116arranged axially between the radially extending portions112and114.

In the example embodiment shown in the FIGURE, the resolver assembly includes bolt118extending through orifice120in radially extending portion112, radially outside of the axially extending portion to fix the clamping plate to the housing. The clamping plate is elastically deformed. In other words, when the clamping plate is fixed to the housing, a portion of the clamping plate is deformed by the resolver stator to press the resolver stator. In the example embodiment shown in the FIGURE, clamping plate110includes semicircular portion122connecting distal end124of the axially extending portion, opposite radially extending portion112, to radially extending portion114. Semicircular portion122is deflected when bolt118is tightened, clamping the resolver stator axially between the housing and radially extending portion114.

Clamping plate110may form a complete ring surrounding an outer diameter of the resolver stator, or the clamping plate may be one of a plurality of tabs distributed circumferentially about axis126. Radially extending portion112may be an annular disk and the axially extending portion may be a tab extending from the annular disk radially outside outer diameter128of the resolver stator.

As shown in the FIGURE, resolver stator106includes notch130and housing104includes tab132disposed in the notch for positioning the resolver stator relative to the housing. The resolver stator is radially and circumferentially positioned by the tab in the notch. Although a tab and notch are shown, other embodiments are possible. For example, a one of the resolver stator or the housing may include a cylindrical protrusion and the other of the resolver or the housing may include a divot or a counterbore for receiving the protrusion. Also, resolver assembly102may include a plurality of tabs or protrusions distributed circumferentially about axis126.

Resolver assembly102includes electric motor108and resolver rotor136. The electric motor includes stator138fixed to the housing and rotor140rotatable relative to the housing and the stator. Axially extending portion116is disposed radially within inside diameter141of the electric motor rotor. The resolver rotor is radially aligned with the resolver stator and fixed to the rotor for corotation. In other words, the resolver rotor and the rotor rotate together. Resolver assembly102also includes bearing142. The rotor includes rotor carrier144, the resolver rotor is fixed to the rotor carrier, and the bearing radially positions the rotor carrier relative to the housing. The resolver rotor and the resolver stator work together to determine a rotational position of the electric motor rotor relative to the electric motor stator by transmitting an electrical signal to a motor controller via an electrical cable (not shown).

As shown in the FIGURE, resolver assembly102is a part of hybrid module100including torque converter146including torque converter clutch148. Hybrid module100also includes K0 clutch150for disconnecting the electric motor rotor from a crankshaft of an internal combustion engine (ICE). Damper152helps isolate ICE torsional fluctuations from the hybrid module.

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