Resolver assembly for hybrid module

1. A hybrid module, comprising:

a housing;

a torque converter comprising:

a turbine having a turbine shell including at least one blade attached thereto;

an impeller having an impeller shell including at least one blade attached thereto; and

an impeller hub extending from a radial end of the impeller shell; and

a resolver assembly comprising:

a rotor connected to an outer surface of the impeller hub;

a stator connected to the housing; and

a resolver hub attached to the outer surface of the impeller hub, the resolver hub comprising:

an inner ring portion;

an outer ring portion disposed radially outward of the inner ring portion; and

an annular wall connecting the inner ring portion and the outer ring portion;

wherein the rotor is disposed and axially retained on the inner ring portion.

2. The hybrid module of claim 1 , wherein:

the resolver hub is press-fit onto the outer surface of the impeller hub.

3. The hybrid module of claim 1 , wherein:

the inner ring portion includes a keyhole defined in an outer surface thereof;

the rotor includes an inner surface and a tab extending radially inward from the inner surface; and

the tab extending radially inward from the inner surface of the rotor is arranged and configured to be received within the keyhole defined in the outer surface of the inner ring portion to position the rotor on the resolver hub.

4. The hybrid module of claim 1 , wherein:

the rotor includes a first axial wall and a second axial wall opposite the first axial wall;

the first axial wall is configured to contact the annular wall of the resolver hub when disposed on the inner ring portion of the resolver hub; and

the inner ring portion of the resolver hub includes staked portions partially covering the second axial wall for axial retention of the rotor on the resolver hub.

5. The hybrid module of claim 1 , wherein the stator is axially aligned with the rotor and a plate is arranged to fix the stator to the housing.

6. The hybrid module of claim 5 , further comprising a connector, wherein the connector fixes the plate to the housing and the stator is clamped between the plate and the housing.

7. The hybrid module of claim 6 , wherein the connector is located radially outside of the stator.

8. The hybrid module of claim 1 , wherein the rotor is bonded to the outer surface of the impeller hub.

9. The hybrid module of claim 1 , wherein the rotor is connected to the outer surface of the impeller hub via a press-fit connection or a shrink-fit connection.

10. The hybrid module of claim 1 , wherein:

the resolver assembly further includes a snap ring;

the impeller hub includes a groove defined in the outer surface; and

the snap ring is configured to be disposed within the groove to axially retain the rotor on the outer surface of the impeller hub.

11. A method of assembling a resolver in a hybrid module having a housing and a torque converter including an impeller hub extending from a radial end of an impeller shell, the method comprising:

attaching a resolver hub of the resolver to an outer surface of the impeller hub, wherein the resolver hub includes an inner ring portion, an outer ring portion disposed radially outward of the inner ring portion, and an annular wall connecting the inner ring portion and the outer ring portion;

locating a rotor of the resolver on the inner ring portion by positioning a key extending radially inward from an inner surface of the rotor within a keyhole defined in an outer surface of the inner ring portion;

aligning the rotor with a stator of the resolver in an axial direction; and

fixing the stator of the resolver to the housing.

12. The method of claim 11 , wherein the resolver hub is press-fit

onto the outer surface of the impeller hub.

13. The method of claim 1 , further comprising:

displacing material from the resolver hub onto the rotor to axially retain the rotor on the inner ring portion of the resolver hub.

14. The method of claim 1 , wherein the rotor includes a first axial wall and a second axial wall opposite the first axial wall, and locating the rotor on the inner ring portion includes arranging the rotor such that the first axial wall contacts the annular wall of the resolver hub.

15. The method of claim 14 , further comprising:

displacing material from the resolver hub onto the second axial wall to axially retain the rotor on the resolver hub.

16. The method of claim 11 , further comprising:

providing a plate arranged to fix the stator to the housing.

17. The method of claim 16 , wherein the plate is fixed to the housing and the stator is clamped between the plate and the housing.

18. The method of claim 11 , further comprising:

bonding an inner surface of the rotor to the outer surface of the impeller hub.

19. The method of claim 11 , further comprising:

press-fitting an inner surface of the rotor to the outer surface of the impeller hub; or

shrink-fitting the inner surface of the rotor to the outer surface of the impeller hub.

20. The method of claim 11 , further comprising:

sliding the rotor over the impeller hub such that an inner surface of the rotor is disposed on the outer surface of the impeller hub; and

inserting a snap ring in a groove defined in the outer surface of the impeller hub for axial retention of the rotor on the impeller hub.