Electrical machine having an integrated temperature sensor and rotor condition capture sensor

Patent metadata

Field	Value
Publication number	US-11670992-B2
Application number	US-201917293142-A
Country	US
Kind code	B2
Filing date	Nov 4, 2019
Priority date	Nov 12, 2018
Publication date	Jun 6, 2023
Grant date	Jun 6, 2023

Abstract

An electric machine for a drive of a motor vehicle, having a stator, a rotor which can be rotated relative to the stator, a temperature sensor arranged and designed to capture a temperature of the stator and a rotor condition capture sensor which is arranged and designed to capture a rotational speed and/or rotational position of the rotor accommodated in a stator-fixed manner. The temperature sensor and the rotor condition capture sensor are implemented as subsystems of a common sensor system, wherein a first subsystem having the temperature sensor has an elastic thermally conductive contact element connected to the temperature sensor, which contact element is permanently fitted to a contact region of the stator. A hybrid module having this electric machine is also provided.

First claim

The invention claimed is:

1. An electric machine for a drive of a motor vehicle, the electric machine comprising:
a stator;
a rotor which is rotatable relative to the stator;
a temperature sensor arranged and configured to capture a temperature of the stator; and
a rotor condition capture sensor arranged and configured to capture at least one of a rotational speed or rotational position of the rotor accommodated in a stator-fixed manner;
wherein the temperature sensor and the rotor condition capture sensor are configured as subsystems of a common sensor system, a first one of the subsystems having the temperature sensor includes an elastic, thermally conductive contact element connected to the temperature sensor, and the contact element is permanently fitted to a contact region of the stator; and
wherein the first subsystem is connected indirectly or directly to a second one of the subsystems having the rotor condition capture sensor via a snap-in connection, the snap-in connection including at least one snap-in hook of the first subsystem coupled to at least one recess of the second subsystem.

2. The electric machine according to claim 1 , wherein the contact element rests against a radial outside, a radial inside, a circumferential side or an axial side of a coil winding of the stator or is at least partially arranged within the coil winding.

3. The electric machine according to claim 1 , wherein the contact element is pressed directly against a wire of a coil winding of the stator.

4. The electric machine according to claim 3 , wherein the contact element is pressed against the wire such that the wire deforms the contact element at least partially elastically.

5. The electric machine according to claim 1 , wherein the first subsystem is connected to a housing region of the sensor system which forms a cable duct.

6. The electric machine according to claim 5 , further comprising a main line guided in the cable duct that is further connected to the temperature sensor and the rotor condition capture sensor.

7. The electric machine according to claim 1 , wherein at least one of the subsystems is electrically connected to a line connection of the sensor system.

8. A hybrid module for a motor vehicle drive train, comprising an electric machine according to claim 1 and at least one clutch that is operatively connected to the rotor.

9. An electric machine for a drive of a motor vehicle, the electric machine comprising:
a stator;
a rotor which is rotatable relative to the stator; and
a common sensor system including a first subsystem having a temperature sensor arranged and configured to capture a temperature of the stator, an elastic, thermally conductive contact element connected to the temperature sensor, the contact element is permanently fitted to a contact region of the stator, and a copper insert is integrated into the contact element such that the copper insert directly contacts the contact region; and
a second subsystem having a rotor condition capture sensor arranged and configured to capture at least one of a rotational speed or rotational position of the rotor.

10. The electric machine according to claim 9 , wherein the contact element rests against a radial outside, a radial inside, a circumferential side or an axial side of a coil winding of the stator or is at least partially arranged within the coil winding.

11. The electric machine according to claim 9 , wherein the contact element is pressed directly against a wire of a coil winding of the stator.

12. The electric machine according to claim 11 , wherein the contact element is pressed against the wire such that the wire deforms the contact element at least partially elastically.

13. The electric machine according to claim 9 , wherein the first subsystem is connected indirectly or directly to the second subsystem having the rotor condition capture sensor via a snap-in connection.

14. The electric machine according to claim 9 , wherein the first subsystem is connected to a housing region of the sensor system which forms a cable duct.

15. The electric machine according to claim 14 , further comprising a main line guided in the cable duct that is further connected to the temperature sensor and the rotor condition capture sensor.

16. The electric machine according to claim 9 , wherein at least one of the first or second subsystems is electrically connected to a line connection of the sensor system.

17. An electric machine for a drive of a motor vehicle, the electric machine comprising:
a stator;
a rotor which is rotatable relative to the stator;
a temperature sensor arranged and configured to capture a temperature of the stator; and
a rotor condition capture sensor arranged and configured to capture at least one of a rotational speed or rotational position of the rotor accommodated in a stator-fixed manner;
wherein the temperature sensor and the rotor condition capture sensor are configured as subsystems of a common sensor system, a first one of the subsystems having the temperature sensor includes an elastic, thermally conductive contact element connected to the temperature sensor, the contact element is permanently fitted to a contact region of the stator, and the contact element rests against a radial outside, a radial inside, or a circumferential side of a coil winding of the stator.

18. The electric machine according to claim 17 , wherein the contact element is pressed directly against a wire of the coil winding of the stator.

19. The electric machine according to claim 18 , wherein the contact element is pressed against the wire such that the wire deforms the contact element at least partially elastically.

Assignees

• Schaeffler Technologies Ag

Inventors

• Ruppert Andreas
• Marsetz Michael
• Fritz Thomas

Classifications

• H02K11/21 Primary

  Devices for sensing speed or position, or actuated thereby (specially adapted for machines having non-mechanical commutating devices H02K29/06, H02K29/14) · CPC title

• H02K11/25 Primary

  Devices for sensing temperature, or actuated thereby · CPC title

• H02K5/22

  Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes · CPC title