E-mail: info@wingostarmotor.com
Tel: +86-13312182969
Contact Us

Tianjin Wingo Star Tech Co.,Ltd

Address:Industrial Zone of Feixiang, Handan Highway East Port, Hebei Province, China

Contact us:Anna Lee

Tel:86-22-58361808

Mobile:86-13312182969

Fax:86-22-58361808

E-mail:info@wingostarmotor.com

Websit:www.wingostarmotors.com

Home > Exhibition > Content

Analysis of the cause of iron core loss

1.The quality of silicon steel is not in conformity with requirements.

Silicon steel sheet as the main magnetic material, its performance compliance has enormous influence on the performance of motor, if only to ensure that the silicon steel sheet grades comply with the design requirements, the other is the same type of silicon steel sheet different manufacturer material performance has a certain difference, when choosing materials should try our best to choose a good material of silicon steel manufacturer.

485469A4B4E6BEE8BB67D1B48F3B0AC8.jpg

2.The stator iron chip insulation is not good.

As a result, there are many factors of poor insulation, such as the quality problem of the silicon steel sheet itself, and the human factor caused by the manufacturing process of iron core.

The silicon steel is not insulated or untreated.

This is the material of silicon steel, this kind of problem in the process of silicon steel sheet testing can be found, but not all of the motor manufacturers have the test project, the problems tend to get better recognition in the motor manufacturer.

23A3510B0531AE56D8DA3EB8550F6F49.jpg

3.Damage or short circuit between sheets.

This kind of problem occurs in the manufacturing process of iron core.

If the pressure of the iron core is too high, the insulation between the plates can be damaged.

The burr is too large after the blanking, and the burr is removed by grinding, which causes the surface insulation of the blanking surface to be seriously damaged.

There is also the iron core after the completion of the trough,not only the use of the repair file;

Or because the internal chamber of the stator is not only, the internal chamber of the stator is different from the machine seat, and so on.

The idiomatic usage of these motor manufacturing processes actually has a great impact on the performance of the motor, especially the iron loss.


When the winding is broken by fire or electric heating, the core is overheated, and the permeability and insulation are damaged.

This problem mainly appears in the production process winding repair and the motor repair process.

In addition, the welding process can also cause the damage of insulation between laminations and increase eddy current loss.

There is no compaction between the sheets of iron.

The final result is that the iron core is underweight, and the most direct result is that the current is too poor, and the fact that iron is too high.


When the silicon steel sheet is oversaturated with thick magnetic circuit, the relation curve of no-load current and voltage is more serious.

This is also the key element of the production process of silicon steel sheet.

In the process of production and processing of iron core, the grain orientation of the silicon steel sheet can be damaged, which leads to the increase of iron loss in the same magnetic sense.

For variable frequency motor, the additional iron loss caused by harmonics is considered;

This is the factor that the design link should consider comprehensively.

E63CCA51C4E250C6FE1B4D6B2BCEBA89.jpg

On the other hand

In addition to the above factors, the design value of the motor iron loss should be based on the actual production and processing of iron core, and the theoretical value should be matched with the actual value.

The General characteristic curve of material suppliers according to Epstein ring method, and the motor in different parts of the magnetics direction is different, this special purpose is iron loss cannot be given at present.

This will result in the inconsistency between the calculated value and the measured value.

In addition to the above factors, the design value of the motor iron loss should be based on the actual production and processing of iron core, and the theoretical value should be matched with the actual value.

General characteristic curve of material suppliers according to Epstein ring method, and the motor in different parts of the magnetizing direction is different, this special rotating iron loss cannot be given at present.

This will result in the inconsistency between the calculated value and the measured value.