STATOR, THREE-PHASE INDUCTION MOTOR, AND COMPRESSOR

• US 20150010414A1
• Filed: 07/01/2014
• Published: 01/08/2015
• Est. Priority Date: 07/02/2013
• Status: Abandoned Application

• Current Assignee: Danfoss Tianjin Ltd.
• Original Assignee: Danfoss Tianjin Ltd.
• Inventors: Tang, Weiping, Yao, Li, Liu, Wanzhen, Liu, Guangqiang, Lin, Yan, Wang, Zhenyu
• Application Number:
  US14/320,893
• Publication Number:
  US 20150010414A1
• Time in Patent Office: Days
• US Class Current: 417/410.5
• CPC Class Codes: F04C 18/0207 both members having co-operating elements in spiral form
• CPC Class Codes: F04C 18/0215 where only one member is moving
• CPC Class Codes: F04C 23/008 Hermetic pumps
• CPC Class Codes: F04C 23/02 Pumps characterised by combination with, or adaptation to, specific driving engines or motors
• CPC Class Codes: F04C 29/0085 Prime movers
• CPC Class Codes: H02K 3/02 Windings characterised by the conductor material
• CPC Class Codes: H02K 3/12 arranged in slots
• CPC Class Codes: H02K 3/34 between conductors or between conductor and core, e.g. slot insulation

Abstract

The present invention provides a stator, a three-phase induction motor and a compressor. The stator is applied to a three-phase induction motor of a compressor. The stator includes: a stator iron core; a plurality of stator teeth extending inwards along a radial direction of the stator; stator slots distributed between the plurality of stator teeth; and three phases of windings wound around the stator teeth to generate a rotating magnetic field, where a coil of each phase of winding in the three phases of windings is made of a composite wire. The composite wire includes a wire core made of a first conductive metal material, and an outer layer wrapping an outer circumferential surface of the wire core and made of a second conductive metal material, wherein the first conductive metal material and the second conductive metal material have different electrical conductivities.

Claims

1. A stator applied to a three-phase induction motor of a compressor, comprising:

a stator iron core;

a plurality of stator teeth extending inwards along a radial direction of the stator;

stator slots distributed between the plurality of stator teeth; and

three phases of windings wound around the stator teeth to generate a rotating magnetic field, wherein

a coil of each phase of winding among the three phases of windings is made of a composite wire, and the composite wire comprises a wire core made of a first conductive metal material, and an outer layer wrapping an outer circumferential surface of the wire core and made of a second conductive metal material, wherein the first conductive metal material and the second conductive metal material have different electrical conductivities.

2. The stator according to claim 1, wherein

the first conductive metal material is aluminum, and the second conductive metal material is copper or a copper alloy;

or,

the first conductive metal material is an aluminum alloy, and the second conductive metal material is copper or a copper alloy.

3. The stator according to claim 1, wherein

the composite wire further comprises an insulating layer wrapping an outer circumferential surface of the outer layer.

4. The stator according to claim 2, wherein the composite wire further comprises an insulating layer wrapping an outer circumferential surface of the outer layer.

5. The stator according to claim 2, wherein

when the first conductive metal material is aluminum and the second conductive metal material is copper, a ratio of a volume of the copper to a volume of the aluminum is (8 to 12):

(92 to

     88) or (13 to

     17);

(87 to

     83).

6. The stator according to claim 5, wherein

an outer diameter of the stator iron core ranges from 6 inches to 9 inches, an inner diameter of the stator iron core is greater than or equal to 3.1 inches, and a ratio of a length of the stator iron core to the inner diameter of the stator iron core is 1.1 to 2.

7. The stator according to claim 6, wherein

a cross-sectional area of the composite wire ranges from 0.6 mm² to 1.5 mm².

8. The stator according to claim 7, wherein

a working voltage of the three-phase induction motor is smaller than or equal to 600 V.

9. A three-phase induction motor applied to a compressor, comprising a rotor and a stator, the rotor being rotatably disposed in the stator and is separated from the stator by a distance, wherein the stator comprises:

a stator iron core;

a plurality of stator teeth extending inwards along a radial direction of the stator;

stator slots distributed between the plurality of stator teeth; and

three phases of windings wound around the stator teeth to generate a rotating magnetic field, wherein a coil of each phase of winding among the three phases of windings is made of a composite wire, and the composite wire comprises a wire core made of a first conductive metal material, and an outer layer wrapping an outer circumferential surface of the wire core and made of a second conductive metal material, wherein the first conductive metal material and the second conductive metal material have different electrical conductivities.

10. The three-phase induction motor according to claim 9, wherein the first conductive metal material is aluminum, and the second conductive metal material is copper or a copper alloy;

or, the first conductive metal material is an aluminum alloy, and the second conductive metal material is copper or a copper alloy.

11. The three-phase induction motor according to claim 10, wherein the composite wire further comprises an insulating layer wrapping an outer circumferential surface of the outer layer.

12. The three-phase induction motor according to claim 11, when the first conductive metal material is aluminum and the second conductive metal material is copper, a ratio of a volume of the copper to a volume of the aluminum is (8 to 12):

(92 to

     88) or (13 to

     17);

(87 to

     83).

13. The three-phase induction motor according to claim 12, wherein a working voltage of the three-phase induction motor is smaller than or equal to 600 V

14. A compressor, comprising a compression mechanism and a three-phase induction motor;

wherein the three-phase induction motor comprises a rotor and a stator, the rotor being rotatably disposed in the stator and is separated from the stator by a distance;

wherein the stator comprises;

a stator iron core;

a plurality of stator teeth extending inwards along a radial direction of the stator;

stator slots distributed between the plurality of stator teeth; and

three phases of windings wound around the stator teeth to generate a rotating magnetic field, wherein a coil of each phase of winding among the three phases of windings is made of a composite wire, and the composite wire comprises a wire core made of a first conductive metal material, and an outer layer wrapping an outer circumferential surface of the wire core and made of a second conductive metal material, wherein the first conductive metal material and the second conductive metal material have different electrical conductivities.

15. The compressor according to claim 14, wherein the compressor is a scroll compressor.