Synchronous Motor, Motor Stator, Pump And Cleaning Apparatus

• US 20160172920A1
• Filed: 12/10/2015
• Published: 06/16/2016
• Est. Priority Date: 12/11/2014
• Status: Active Grant

• Current Assignee: Johnson Electric International AG (Johnson Electric Holdings Limited)
• Original Assignee: Johnson Electric SA (Johnson Electric Holdings Limited)
• Inventors: Zhang, Xiao Lin, Li, Min, Reddy, Moola Mallikarjuna
• Granted Patent: US 10,294,959 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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, when the stator windings are connected in series to an alternating current power supply, the rotor rotates at a constant speed of 60 f/p RPM during a steady state, where f is the frequency of the alternating current power supply, and p is the number of pole pairs of the permanent magnetic rotor;

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 the two branches;

wherein 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.

2. The synchronous motor of claim 1, wherein the two branches are parallel to each other, and the two stator windings are wound around two insulating brackets that are attached around the two parallel branches.

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

4. The synchronous motor of claim 3, wherein the two insulating brackets each form a wire guiding slot, the two incoming terminals of the two stator windings are routed from an outside of the brackets through the wire guiding slots to a winding space at an inside of the brackets, and 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 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 the two branches;

wherein 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.

8. The motor stator of claim 7, wherein the two branches are parallel to each other, and the two stator windings are wound around two insulating brackets that are attached around the two parallel branches.

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

10. The motor stator of claim 9, wherein the two insulating brackets each form a wire guiding slot, the two incoming terminals of the two stator windings are routed from an outside of the brackets through the wire guiding slots to a winding space at an inside of the brackets, and 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 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.