Traction engine for a vehicle

Patent metadata

Field	Value
Publication number	US-11949285-B2
Application number	US-202117509095-A
Country	US
Kind code	B2
Filing date	Oct 25, 2021
Priority date	Oct 29, 2020
Publication date	Apr 2, 2024
Grant date	Apr 2, 2024

Abstract

An electric machine for a vehicle includes: a stator body, the stator body having, in an alternating manner, stator teeth and stator grooves with conductor elements which are arranged therein, and a yoke section with a radially extending yoke height on the stator body radially outside the stator grooves and the stator teeth, the stator body having a stator outer radius. A ratio of the yoke height in relation to the stator outer radius is between 0.20 and 0.28.

First claim

What is claimed is:

1. An electric machine for a vehicle, comprising:
a stator body, the stator body having, in an alternating manner, stator teeth and stator grooves with conductor elements which are arranged therein, and a yoke section with a radially extending yoke height on the stator body radially outside the stator grooves and the stator teeth, the stator body having a stator outer radius,
wherein a ratio of the yoke height in relation to the stator outer radius is between 0.20 and 0.28.

2. The electric machine of claim 1 , wherein the stator body has a stator inner radius, and
wherein a ratio of the stator inner radius to the stator outer radius is between 0.58 and 0.66.

3. The electric machine of claim 1 , wherein two or three stator grooves are provided per pole and per strand on the stator body.

4. The electric machine of claim 1 , wherein a ratio of a stator tooth width to a stator groove width with two stator grooves per pole and per strand is between 0.55 and 0.8, or
wherein the ratio of the stator tooth width to the stator groove width with three stator grooves per pole and per strand is between 1.15 and 1.6.

5. The electric machine of claim 1 , wherein the electric machine has a pole pair number (p) of p=3.

6. The electric machine of claim 1 , wherein each of the stator teeth has a radially inner end, each having one tooth tip with a cross section which is enlarged in relation to the respective stator tooth.

7. The electric machine of claim 2 , further comprising:
a rotor with a rotor outer radius, the rotor outer radius being smaller by a radially oriented air gap height than the stator inner radius.

8. The electric machine of claim 1 , wherein the conductor elements are cooled directly.

9. The electric machine of claim 1 , wherein the electric machine comprises a permanently excited synchronous machine or a separately excited synchronous machine.

10. The electric machine of claim 1 , wherein the rotor comprises a plurality of magnets, wherein each magnet of the plurality of magnets is equipped with an air pocket.

Assignees

• Porsche Ag

Inventors

• Bauer David
• Dubsky Josef
• Engelhardt Tobias

Classifications

• H02K1/165 Primary

  Shape, form or location of the slots · CPC title

• H02K21/14 Primary

  with magnets rotating within the armatures · CPC title

• H02K2213/03

  Machines characterised by numerical values, ranges, mathematical expressions or similar information · CPC title

• H02K1/20

  with channels or ducts for flow of cooling medium · CPC title

• H02K3/12

  arranged in slots · CPC title