Granted Patent B2

US 8,749,104 · App. 13/095,387 · Granted Jun 10, 2014

Abstract

Claims (10)

1. Rotating electric machine comprising;

a rotor with a number (N r ) of magnets distributed along a circumference thereof and a number (p r ) of rotor pole pairs; and

a stator with a number (p s ) of stator pole pairs and a number (N s ) of stator slots;

wherein the number (N s ) of stator slots, the number (N r ) of magnets and the number (p s ) of stator pole pairs are related by an equation; N s =N r ±2p s .

2. Rotating electric machine according to claim 1 , wherein the stator comprises a plurality of stator coils with each of said stator coils related to a phase of the machine, and the stator coils are separated from each other and are arranged in a series along the circumference of the stator.

3. Rotating electric machine according to claim 2 , wherein each of said stator coils comprises a plurality of adjacent single coils, each having an inner space to be put on a stator tooth, and each of said stator coils is wound in one piece from a single, continuous flat cable.

4. Rotating electric machine according to claim 1 , wherein said magnets are permanent magnets.

5. Rotating electric machine according to claim 1 , wherein the stator comprises a laminated stator core, and said laminated stator core is a stack of packets of laminations.

6. Rotating electric machine according to claim 5 , wherein each packet of laminations has a thickness of 10 mm-15 mm.

7. Rotating electric machine according to claim 1 , wherein the machine is a synchronous permanent magnet machine.

Assignments (8)