Winding structure for high power density, axial field motor

• US 10,461,597 B2
• Filed: 10/24/2014
• Issued: 10/29/2019
• Est. Priority Date: 10/24/2014
• Status: Active Grant

• Current Assignee: Fortior Technology (Shen-Zhen) Co., Ltd
• Original Assignee: Fortior Technology (Shen-Zhen) Co., Ltd
• Inventors: Bi, Lei
• Primary Examiner(s): Desai, Naishadh N
• Application Number:
  US15/527,720
• Publication Number:
  US 20170324292A1
• Time in Patent Office: 1,831 Days
• Field of Search: 310179-210
• CPC Class Codes: H02K 21/24 with magnets axially facing the armatures, e.g. hub-type cycle dynamos
• CPC Class Codes: H02K 3/26 consisting of printed conductors

Abstract

The present invention discloses a winding structure and method having a high power density, and motor applying the above. The winding of the present invention has a multilayer 2D structure, has a distributed structure with an electrical angle of 180 degrees and is manufactured in the form of a PCB, wherein each layer arranged only one phase winding. Each phase windings contains 2 layers, or 4 layers, or other even layers, of windings. The number of coil cycles in every layer is the same as the motor poles, the winding layers of a same phase are connected via a through hole, the connecting hole is arranged at a corner of an upper portion of the winding loop inside.

Claims

1. A winding structure having a high power density, characterized in that, the winding has a multilayer 2D structure and the winding has a distributed structure with an electrical angle of 180 degrees, wherein each layer contains only one phase winding, every phase winding are arranged in an even number of layer windings, and connected with through holes at a corner of an upper portion of the coil loop, the winding structure is provided with an A-phase winding, a B-phase winding and a C-phase winding, wherein the B-phase winding and the A-phase winding have a difference of an electrical angle of 120 degrees in a tangential space, the C-phase winding and the A-phase winding have a difference of an electrical angle of 240 degrees in the tangential space, the A-phase winding, the B-phase winding and the C-phase winding form the three-phase winding symmetry in space.

2. The winding structure having a high power density according to claim 1, characterized in that, each of the A-phase winding, the B-phase winding and the C-phase winding consists of two layer windings, wherein the A-phase winding comprises a first-layer winding and a sixth-layer winding, the B-phase winding comprises a second-layer winding and a fifth-layer winding, and the C-phase winding comprises a third-layer winding and a fourth-layer winding.

3. The winding structure having a high power density according to claim 1, characterized in that, the winding structure is manufactured in the form of a PCB.

4. The winding structure having a high power density according to claim 3, characterized in that, when the winding is connected in Y-type, the natural point of the winding is arranged at the inner side of a circuit of the PCB.

5. A motor having an axial magnetic field, characterized in that, the motor comprises a rotor yoke, a permanent magnet ring a stator yoke, a motor base and a winding structure having a high power density of the motor having an axial magnetic field according to claim 1, wherein the stator yoke is arranged on the motor base, the winding structure is arranged between the permanent magnet and the stator yoke, and the rotor yoke is arranged on the permanent magnet surface for enhancing the air gap field.

6. The motor having an axial magnetic field according to claim 5, characterized in that, the winding on the each layer consists of 6 cycles of winding loops, which correspond to the 6 poles magnet on the rotor.

7. The motor having an axial magnetic field according to claim 5, characterized in that, the rotor yoke is made of soft magnetic material.

8. The motor having an axial magnetic field according to claim 7, characterized in that, the rotor yoke is made of soft magnetic ferrite or soft magnetic composite material, or other soft magnetic materials.

9. The winding structure having a high power density according to claim 1, characterized in that, the winding structure is manufactured in the form of a PCB.

10. The winding structure having a high power density according to claim 2, characterized in that, the winding structure is manufactured in the form of a PCB.

11. The winding structure having a high power density according to claim 9, characterized in that, when the winding is connected in Y-type, the natural point of the winding is arranged at the inner side of a circuit of the PCB.

12. The winding structure having a high power density according to claim 10, characterized in that, when the winding is connected in Y-type, the natural point of the winding is arranged at the inner side of a circuit of the PCB.

13. The motor having an axial magnetic field according to claim 6, characterized in that, the rotor yoke is made of soft magnetic material.

14. The motor having an axial magnetic field according to claim 13, characterized in that, the rotor yoke is made of soft magnetic ferrite or soft magnetic composite material, or other soft magnetic materials.