Magnetic unit, rotor, rotating electric machine, automobile, and method for manufacturing a rotor

Abstract

A magnet unit is provided that allows for easy installation of a temperature information transmitting device on the rotor core while ensuring robustness. [Solution] In the magnet unit 30, the magnet member 35 includes at least one magnet and has a columnar shape with a main surface 35d and an end surface 35a having an area smaller than the area of ​​the main surface 35d on its surface. The temperature information transmitting device 50 is provided on the surface of the magnet member 35 and transmits temperature information of the magnet member 35. The temperature information transmitting device 50 is in contact with the magnet member 35. In the temperature information transmitting device 50, the temperature sensing unit 52 detects the surface temperature. The coil 51 is provided on the end surface 35a and outputs temperature information detected by the temperature sensing unit 52.

Claims

1. A magnet member having a columnar shape, which includes at least one magnet and has a main surface and an end surface having an area smaller than the area of ​​the main surface, The system includes a temperature information transmitting device provided on the surface of the magnetic member and which transmits temperature information of the magnetic member, The temperature information transmitting device is A temperature-sensing unit that contacts the magnetic member and detects the temperature of the magnetic member, A magnet unit comprising: a coil provided on the end face of the magnet member, which outputs temperature information detected by the temperature sensing element.

2. The surface of the magnet unit consists of a first and second end face located opposite each other in a direction intersecting the end face of the magnet member, and a connecting surface connecting the first end face and the second end face. The magnet unit according to claim 1, wherein the connecting surface is formed flush with the end surface in a direction intersecting the end surface.

3. The temperature sensing element and the coil are provided on the end face of the magnetic member. The magnet unit according to claim 2, wherein the temperature sensing portion is in contact with the end face.

4. The magnetic unit according to claim 1, wherein the magnetic member and the temperature information transmitting device are bonded to each other.

5. The magnetic member is connected to the end face of the magnetic member and has a side surface that extends in a direction intersecting the end face of the magnetic member. The magnet unit according to claim 1, wherein the temperature sensing portion is in contact with the side surface of the magnet member.

6. A magnet unit according to any one of claims 1 to 5, It comprises a rotor core that rotates while holding the aforementioned magnet unit, The rotor core has a gap that extends in the direction of the rotation axis of the rotor core, The magnet unit is positioned in the gap such that the coil is exposed from the rotor core when viewed in the direction of the rotation axis, and the rotor is a rotor.

7. The rotor according to claim 6, wherein the magnetic member is formed with its longitudinal direction aligned with the main surface of the magnetic member and intersecting the end surface of the magnetic member.

8. The rotor according to claim 6, wherein, when viewed from a direction perpendicular to the rotation axis, the entire magnet unit overlaps with the rotor core.

9. Stator and, The rotor according to claim 6, A rotating electric machine comprising a temperature information receiving device provided on the stator and including a coil that is magnetically coupled to the coil of the rotor.

10. An automobile equipped with the rotating electric machine described in claim 9.

11. A magnet unit comprising: a magnet member having a columnar shape including at least one magnet and having a main surface and an end surface having an area smaller than the area of ​​the main surface; a temperature sensing unit that contacts the at least one magnet and detects the temperature of the magnet member; and a temperature information transmitting device provided on the end surface and including a coil that outputs information of the temperature detected by the temperature sensing unit, A method for manufacturing a rotor, comprising inserting the coil into a gap extending in the direction of the rotation axis of a rotor core that rotates while holding the magnet unit, such that the coil is exposed from the rotor core when viewed from the direction of the rotation axis.

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