Electric motors, compressors, and refrigeration cycle systems

Abstract

To provide a more efficient electric motor, compressor, and refrigeration cycle device with excellent winding cooling and reduced electrical energy loss in a winding.SOLUTION: A teeth tip 42b of an electric motor 12 includes a rotation direction first protrusion 51 that protrudes in the rotation direction R of a rotor 22, and a reverse direction first protrusion 52 protruding in a direction opposite to the rotation direction of the rotor 22. Insulating end plates 45A and 45B include a rotation direction second protrusion 65 covering the rotation direction first protrusion 51, and a reverse direction second protrusion 66 that covers the reverse direction first protrusion 52. The reverse direction second protrusion 66 includes a first hole 71 that communicates with a slot 49 of a stator 21.SELECTED DRAWING: Figure 3

Claims

1. A cylindrical stator, The rotor is positioned inside the stator, The stator is, A cylindrical yoke, and an iron core having a plurality of teeth that protrude inward from the yoke and are spaced apart and arranged circumferentially, A plurality of insulating end plates provided on each end face of the iron core, A winding is wrapped around each of the teeth and the insulating end plate, It comprises a plurality of insulating sheets, each of which is arranged in a slot between adjacent teeth and sandwiched between each winding and each of the teeth, Viewed from a direction along the rotational centerline of the rotor, Each of the teeth has a first projection in the rotational direction that protrudes in the direction of rotation of the rotor, and a first projection in the reverse direction that protrudes in the opposite direction of rotation of the rotor. The insulating end plate has a second projection in the rotational direction that covers the first projection in the rotational direction, and the second projection in the reverse direction that covers the first projection in the reverse direction protrudes radially outward from the first projection in the reverse direction at the tip of the teeth. The aforementioned second projection in the reverse direction is an electric motor having a first hole that connects to the slot.

2. Viewed from a direction along the rotational centerline of the rotor, The motor according to claim 1, wherein the second protrusion in the rotational direction is a second hole connected to the slot, or a second recess connected to the slot and open toward the winding.

3. Viewed from a direction along the rotational centerline of the rotor, The electric motor according to claim 2, wherein the second hole and the second recess have a smaller opening area than the first recess which is connected to the first hole and the slot and is open toward the winding.

4. A sealed container, A compression mechanism, housed in the aforementioned sealed container and capable of compressing a refrigerant, A compressor comprising an electric motor according to any one of claims 1 to 3, which is housed in the sealed container and drives the compression mechanism.

5. A refrigeration cycle apparatus comprising: a compressor as described in claim 4; a heat sink; an expansion device; a heat absorber; and refrigerant piping connecting the compressor, the heat sink, the expansion device, and the heat absorber for circulating a refrigerant.

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