Blog

I. What is Saturation Magnetic Flux Density?

The saturation magnetic flux density of siliciumstål is comparable to the maximum capacity of a water cup. When magnetic field intensity rises to a certain threshold, magnetic flux density stops increasing noticeably. This critical value sets the upper efficiency limit for motors and transformers.

• Physical mechanism: The maximum magnetization capacity when all magnetic domains inside magnetic materials are fully aligned.
• Typical range: Conventional siliciumstål registers between 1.5 T and 2.0 T (Tesla is the unit of magnetic flux density).
• Temperature influence: The saturation value decreases by roughly 0.05 T for every 100 °C temperature rise.

II. How to Select Suitable Silicon Steel Grades

Selecting siliciumstål is similar to picking athletes, as different working conditions call for distinct material properties:

• High-frequency applications: Adopt thin gauges (0.2–0.35 mm) to cut eddy current loss.
• High-power scenarios: Prioritize grain-oriented silicon steel, whose saturation value is 10%–15% higher than non-oriented types.
• Cost-sensitive projects: Medium and low-grade non-oriented silicon steel delivers superior cost performance.

III. Three Critical Precautions During Application

These details directly determine the service life of equipment:

• Stress relief: Stamping reduces magnetic performance by 5%–8%; stress-relief annealing is recommended.
• Stacking guidance: Control the stacking factor within 0.95–0.98; excessively low values hinder magnetic flux transmission.
• Aging inspection: Test core loss variation after 2,000 operating hours; the normal growth range should stay below 15%.