Synchronous motor, motor stator, pump and cleaning apparatus

• US 10,294,959 B2
• Filed: 12/10/2015
• Issued: 05/21/2019
• Est. Priority Date: 12/11/2014
• Status: Expired due to Fees

• Current Assignee: Johnson Electric International AG (Johnson Electric Holdings Limited)
• Original Assignee: Johnson Electric International AG (Johnson Electric Holdings Limited)
• Inventors: Li, Min, Reddy, Moola Mallikarjuna, Zhang, Xiao Lin
• Primary Examiner(s): Stimpert, Philip E
• Application Number:
  US14/965,357
• Publication Number:
  US 20160172920A1
• Time in Patent Office: 1,258 Days
• CPC Class Codes: F04D 1/00 Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps adapted for pumping specific fluids F04D7/00; priming or boosting F04D9/00
• CPC Class Codes: F04D 13/06 the pump being electrically driven
• CPC Class Codes: F04D 29/043 Shafts
• CPC Class Codes: F04D 29/22 specially for centrifugal pumps
• CPC Class Codes: F04D 29/4293 Details of fluid inlet or outlet
• CPC Class Codes: H02K 1/143 of the horse-shoe type
• CPC Class Codes: H02K 1/278 Surface mounted magnets; Inset magnets
• CPC Class Codes: H02K 1/28 Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
• CPC Class Codes: H02K 21/185 with the axis of the rotor perpendicular to the plane of the armature
• CPC Class Codes: H02K 2213/03 Machines characterised by numerical values, ranges, mathematical expressions or similar information
• CPC Class Codes: H02K 3/524 for U-shaped, E-shaped or similarly shaped cores

Abstract

A synchronous motor, motor stator, pump and cleaning apparatus are provided. The motor stator includes a stator core and two stator windings. The stator core includes two opposing poles and a yoke having a bottom and two branches. The stator windings are respectively wound around the branches. The two stator windings are respectively formed by winding two separate electric wires. Each electric wire has an incoming terminal and an outgoing terminal. The two incoming terminals of the two stator windings are disposed at inner layers of the stator windings, and the two outgoing terminals are disposed at outer layers of the stator windings.

Claims

1. A synchronous motor comprising a stator and a permanent magnetic rotor rotatable relative to the stator, wherein the rotor comprises a shaft and a magnet fixed to the shaft, the stator comprises a stator core and two stator windings wound around the stator core, the stator core comprises a pair of opposing poles and a yoke connected between the poles, the yoke comprises a bottom and two branches extending from the bottom, the two stator windings are respectively wound around two insulating brackets that are attached around the two branches;

wherein the two stator windings are respectively formed by winding two separate electric wires, each electric wire has a first terminal and a second terminal, the two first terminals of the two stator windings are disposed at inner layers of the stator windings, and the two second terminals are disposed at outer layers of the stator windings, and wherein the two insulating brackets each form a zig-zagged wire guiding slot on an end wall of the insulating bracket, each zig-zagged wire guiding slot comprises a first wire-guiding slot, a second wire-guiding slot and a third wire-guiding slot defined in a same lateral surface of the end wall of the insulating bracket which is parallel with a longitudinal direction of the insulating bracket, the first wire-guiding slot and the third wire-guiding slot respectively extend through two opposite ends of the lateral surface of the end wall in the longitudinal direction of the insulating bracket, the second wire-guiding slot is connected between and transverse to the first and third wire-guiding slots so as to be disposed parallel to the longitudinal direction of the insulating bracket, and two internal wire guiding corners respectively connect the first wire-guiding slot to the second wire-guiding slot and connect the second wire-guiding slot to the third wire-guiding slot, the two first terminals of the two stator windings are routed from an outside of the brackets through the first, second and third wire-guiding slots of the zig-zagged wire guiding slots to a winding space at an inside of the brackets, the zig-zagged wire guiding slots are capable of positioning the first terminals.

2. The synchronous motor of claim 1, wherein the two branches are parallel to each other.

3. The synchronous motor of claim 2, wherein the two first terminals of the two stator windings are located at one lengthwise end of the two branches, and the two second terminals are located at the other lengthwise end of the two branches.

4. The synchronous motor of claim 3, wherein an isolating wall is formed between the wire guiding slot and the winding space at the inside of the bracket.

5. The synchronous motor of claim 2, wherein the two insulating brackets are integrally formed with each other and are bendable to be parallel to each other.

6. The synchronous motor of claim 1, wherein the motor comprises a circuit board fixed to the stator, and the two outgoing terminals are soldered to the circuit board.

7. A motor stator comprising a stator core and two stator windings wound around the stator core, wherein the stator core comprises two opposing poles and a yoke connected between the poles, the yoke comprises a bottom and two branches extending from the bottom, the two stator windings are respectively wound around two insulating brackets that are attached around the two branches;

wherein the two stator windings are respectively formed by winding two separate electric wires, each electric wire has a first terminal and a second terminal, the two first terminals of the two stator windings are disposed at inner layers of the stator windings, and the two second terminals are disposed at outer layers of the stator windings, and wherein the two insulating brackets each form a zig-zagged wire guiding slot on an end wall of the insulating bracket, each zig-zagged wire guiding slot comprises a first wire-guiding slot, a second wire-guiding slot and a third wire-guiding slot defined in a same surface of the end wall of the insulating bracket which is parallel with a longitudinal direction of the insulating bracket, the second wire-guiding slot is connected between and transverse to the first and third wire-guiding slots so as to be disposed parallel to the longitudinal direction of the insulating bracket, and two internal wire guiding corners respectively connect the first wire-guiding slot to the second wire-guiding slot and connect the second wire-guiding slot to the third wire-guiding slot, the two first terminals of the two stator windings are routed from an outside of the brackets through the first, second and third wire-guiding slots of the zig-zagged wire guiding slots to a winding space at an inside of the brackets, the zig-zagged wire guiding slots are capable of positioning the first terminals.

8. The motor stator of claim 7, wherein the two branches are parallel to each other.

9. The motor stator of claim 8, wherein the two first terminals of the two stator windings are located at one lengthwise end of the two branches, and the two second terminals are located at the other lengthwise end of the two branches.

10. The motor stator of claim 9, wherein an isolating wall is formed between the wire guiding slot and the winding space at the inside of the bracket.

11. A pump comprising:

a pump housing having a pump chamber;

an inlet and an outlet in communication with the pump chamber;

an impeller rotatably disposed in the pump chamber; and

a motor for driving the impeller, wherein the motor comprises a stator in accordance with claim 7 and a rotor rotatable relative to the stator.

12. A cleaning apparatus comprising a cleaning chamber, a water supply passage for supplying cleaning water to the cleaning chamber, a drain passage for drainage of the cleaning water, and a drain pump for pumping the cleaning water in the cleaning chamber to the drain passage, wherein the drain pump comprises the features of the pump in accordance with claim 11.