Unlock instant, AI-driven research and patent intelligence for your innovation.

Synchronous rotating electric machine with permanent magnets and flux concentration

By arranging a demagnetizing flux magnetic circuit and a specific structure in the rotor of the synchronous rotating motor, the risk of demagnetization of the permanent magnets is reduced, the problem in the existing technology that the permanent magnets are easily demagnetized under high temperature conditions is solved, and the stability of the motor is improved. sex and performance.

Active Publication Date: 2014-07-09
VALEO EQUIP ELECTRIC MOTEUR
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, demagnetizing flux in motors with permanent magnets has a risk of demagnetizing the magnets, an even greater risk when the magnets are hot
Concentrating motors are particularly susceptible to this risk of demagnetization due to the placement of the magnets of these motors in the rotor

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] figure 1 The structure of the specific embodiment 1 of the demagnetizable rotating electric machine according to the present invention is shown. The motor 1 is of a type with hidden magnets and magnetization and includes a stator 10 and a rotor 11.

[0028] A specific embodiment of such an electric machine according to the invention is for example an 8 to 10 kW traction motor applied to a motor vehicle of the type known as "mild hybrid". This particular embodiment of the motor includes a stator 10 with 60 recesses 101 and a rotor 11 with 10 alternating north and south poles. The rotor 11 has a diameter on the order of 100 mm and an axial length on the order of 50 mm. The rotor 11 includes 10 permanent magnets PM, which have a substantially rectangular shape and have a size: length (L zs )×height (h a )×width (I a )=50mm×25mm×5mm.

[0029] The stator 10 and the rotor 11 are traditionally equipped with a metal sheet package forming a magnetic body.

[0030] The recesses 101 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a synchronous rotating electrical machine with permanent magnets and magnetic concentration. The electric machine according to the invention comprises a stator (10) and a rotor (11). The rotor is of the magnetic concentration type and comprises a plurality of alternating north and south poles formed by permanent magnets (PM). The magnets are accommodated in slots (E1) provided in the magnetic body of the rotor. According to the invention, for each permanent magnet, the rotor comprises a magnetic circuit allowing the circulation of the demagnetizing flux. The magnetic circuit has a reluctance (Rf) of the deflux magnetic circuit determined as a function of the internal reluctance (Ra) of the magnet such that the reluctance of the deflux magnetic circuit is equal to the internal reluctance (Ra) of the magnet. The ratio (Rf / Ra) is within the range of preset values ​​to ensure that the magnet resists the risk of demagnetization. The preset value ranges from about 0.3 to about 3, depending on the type of magnet.

Description

Technical field [0001] The invention relates to a synchronous rotating electrical machine with permanent magnets and flux concentration. More particularly, the present invention relates to rotating electric machines of this type for applications such as generators or electric traction motors in electric or hybrid vehicles. Background technique [0002] Due to the improved performance in terms of output and power-to-weight ratio and power-to-volume ratio, synchronous motors with permanent magnets are currently widely used in the traction field of motor vehicles. In addition, the large number of rare earth permanent magnets and their availability under acceptable economic conditions make the choice of this electric motor feasible for the new generation of motor vehicles. [0003] This electric motor can be produced with a wide range of power and speed, and will neutralize low CO in all-electric vehicles known as "mild-hybrid" and "full-hybrid" types 2 Used in vehicles. [0004] "Mild...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H02K21/12H02K21/02H02K1/27
CPCH02K1/2773H02K21/14H02K2213/03
Owner VALEO EQUIP ELECTRIC MOTEUR
PatSnap Eureka logo

PatSnap Eureka turns technology decisions into work you can execute. Powered by our Innovation Knowledge Graph, it runs expert workflows across engineering, life sciences, materials and intellectual property. Get your review-ready output in minutes.

X (Twitter)LinkedInYouTubeSubstack

© 2026 PatSnap. All rights reserved. 

Terms of Service

 | 

Privacy policy

 | 

Modern Slavery Act Transparency Statement