Electric motor

Patent metadata

Field	Value
Publication number	US-9570945-B2
Application number	US-201113884743-A
Country	US
Kind code	B2
Filing date	Nov 2, 2011
Priority date	Nov 11, 2010
Publication date	Feb 14, 2017
Grant date	Feb 14, 2017

Abstract

An electric motor includes a stator, a rotor and a can arranged between the stator and the rotor, wherein the stator exhibits several stator pole pairs, which are each formed by two adjacent stator poles, which are designed in such a way as to generate oppositely polarized magnetic fields, and wherein the rotor exhibits a plurality of magnetic rotor poles distributed over the circumference, and is configured in such a way as to enable a magnetic flux between two adjacent rotor poles, as well as a pumping set with such an electric motor.

First claim

The invention claimed is:

1. An electric motor comprising a stator ( 4 ), a circuit board ( 30 ) mounted on the stator ( 4 ), a rotor ( 8 ), and a can ( 6 ) arranged between the stator ( 4 ) and the rotor ( 8 ), wherein
the stator ( 4 ) includes several stator pole pairs ( 26 ), which are each formed by two adjacent stator poles ( 20 ), which are configured to generate oppositely polarized magnetic fields, wherein the stator poles are designed as pole webs ( 20 ) with coils ( 24 ) arranged thereon, the coils ( 24 ) of two adjacent stator poles ( 20 ) forming a stator pole pair ( 26 ) are electrically connected in series, all coils ( 24 ) have the same design, the coils ( 24 ) are wired to one another via the circuit board, and the coils ( 24 ) have axially protruding contacts which engage corresponding contacts or conducting paths on the circuit board to form an electrical connection, and wherein
the rotor ( 8 ) includes a plurality of magnetic rotor poles ( 34 ) distributed over a circumference of the rotor, and is configured to enable a magnetic flux between two adjacent rotor poles ( 34 ).

2. The electric motor according to claim 1 , wherein the stator poles of a stator pole pair ( 26 ) are designed as pole webs ( 20 ), which are joined together by a magnetically soft connection element ( 28 ).

3. The electric motor according to claim 1 , wherein the stator poles ( 20 ) of a pole pair ( 26 ) include a shared coil.

4. The electric motor according to claim 3 , wherein the stator poles ( 20 ) of a stator pole pair ( 26 ) are designed as pole webs ( 20 ), which are joined together by a magnetically soft connection element ( 28 ), wherein at least one coil is situated on the connection element.

5. The electric motor according to claim 1 , wherein the coils ( 24 ) of the stator poles ( 20 ) of two diametrically opposed stator pole pairs ( 26 ) are electrically connected in series.

6. The electric motor according to claim 1 , wherein the circuit board ( 30 ) carries at least parts comprising engine electronics.

7. The electric motor according to claim 1 , wherein the electric motor is designed as a 3-phase motor with six stator pole pairs.

8. The electric motor according to claim 1 , wherein the rotor ( 8 ) is Halbach magnetized.

9. The electric motor according to claim 1 , wherein the rotor ( 8 ) has a pole ring ( 18 ) made out of a magnetic material, in which the rotor poles ( 34 ) are formed.

10. The electric motor according to claim 1 , wherein the motor is designed as a spherical motor with a can ( 6 ) designed as a separating calotte.

11. A pumping set, comprising an electric motor according to claim 1 as the drive motor.

12. A pumping set according to claim 11 , wherein the pumping set is designed as a recirculation pumping set.

13. A pumping set according to claim 12 , wherein the pumping set is a heating or industrial water recirculation pumping set.

Assignees

• Fischer Peter
• Grundfos Holding As

Inventors

• Fischer Peter

Classifications

• H02K5/22

  Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes · CPC title

• H02K1/148

  Sectional cores (H02K1/141 takes precedence) · CPC title

• H02K5/128

  using air-gap sleeves or air-gap discs · CPC title

• H02P6/182

  using back-emf in windings · CPC title

• F04D13/064

  Details of the magnetic circuit · CPC title