STATOR AND EPS MOTOR HAVING THE SAME

• US 20130038152A1
• Filed: 07/12/2012
• Published: 02/14/2013
• Est. Priority Date: 08/10/2011
• Status: Abandoned Application

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: WOO, SHUNGHUN, Lee, Myoungseok
• Application Number:
  US13/547,500
• Publication Number:
  US 20130038152A1
• Time in Patent Office: Days
• US Class Current: 310/71
• CPC Class Codes: H02K 2203/03 Machines characterised by the wiring boards, i.e. printed circuit boards or similar structures for connecting the winding terminations
• CPC Class Codes: H02K 3/522 for generally annular cores with salient poles

Abstract

Disclosed is a stator of an EPS motor, the stator including a stator core wound by a coil and provided in a cylindrical shape by coupling of a plurality of divided cores, a bus bar conductively connected to the coil to be coupled to an upper side of the stator core, and a guide unit guiding the bus bar to a coupled position determined by the stator core

Claims

1. A stator of an EPS motor, the stator comprising:

a stator core wound by a coil and provided in a cylindrical shape by coupling of a plurality of divided cores;

a bus bar conductively connected to the coil to be coupled to an upper side of the stator core; and

a guide unit guiding the bus bar to a coupled position determined by the stator core.

2. The stator of claim 1, wherein the guide unit includes a guide groove formed at a periphery of the stator core in a parallel direction with a central axis of the stator core, and a guide lug protrusively formed toward a floor surface of the bus bar to be coupled to the guide groove.

3. The stator of claim 2, wherein the guide lug forms a taper unit at a position near to both wall surfaces of the guide groove and has a pointed shape to a direction the guide groove is inserted.

4. The stator of claim 3, wherein the guide lug and the guide groove are provided in a mutually complimentary shape.

5. The stator of claim 4, wherein the guide lug takes a square shape at a cross-section perpendicular to a direction the guide groove is inserted.

6. The stator of claim 3, wherein a plurality of the guide lugs is protrusively formed along a circumference of the bus bar.

7. The stator of claim 6, wherein a total of 12 divided cores are coupled to form the stator core, and the guide lug is coupled to two continuous divided cores, where a total of six of the two divided cores are provided in a skipping manner, and an inner angle is 120 degrees that is formed between imaginary extension lines connecting a center of a distance among a pair of guide lugs adjacent to a center of the stator core.

8. The stator of claim 7, wherein the guide lug is injection-molded with a same material as that of a bus bar body.

9. The stator of claim 8, wherein the guide unit further includes a stopper protrusively formed at a periphery of the bus bar body to surface-contact an upper surface of the divided core forming the stator core, and the guide lug is protrusively formed at a floor surface of the stopper.

10. An EPS motor, the motor comprising:

a motor housing;

a stator mounted at an inner side of the motor housing and including a stator core, a coil wound on the stator core and a coil terminal coupled to a distal end of the coil;

a rotor rotatably formed at a center of the stator;

a sensing magnet module mounted at an upper side of the rotor for sensing a position of the rotor;

a magnetic element disposed opposite to the sensing magnet module to sense a magnetic force of the sensing magnet module; and

a multi-layered PCB including a sensor layer mounted with the magnetic element and a plurality of power layers respectively connected to powers each power having a different polarity supplied to the coil.

11. The EPS motor of claim 10, wherein the plurality of power layers includes first, second and third power layers, when connected to a 3-phase power.

12. The EPS motor of claim 10, wherein the multi-layered PCB covers an entire upper surface of the motor housing.

13. The EPS motor of claim 12, wherein the multi-layered PCB includes a terminal hole penetratively coupled to the coil terminal.

14. The EPS motor of claim 13, wherein the terminal hole is conductively connected to any one layer of the first, second and third power layers.

15. The EPS motor of claim 14, wherein a total of 18 terminal holes are penetratively formed along a peripheral surface of the PCB.

16. The EPS motor of claim 15, wherein the terminal hole is connected to a power layer mutually different from another adjacent terminal hole to allow coil terminals coupled to the terminal hole to receive a power of polarity mutually different from that of the coil terminals coupled to another adjacent terminal hole.