Four methods for determining inductance saturation 2

Four techniques for determining inductance saturation

1. Static magnetic characteristic curve method

The static magnetic characteristic curve (B-H curve) is the most direct method for determining inductance saturation. By measuring the relationship between the magnetic flux density (B) and magnetic field strength (H) of an inductor at different currents, the saturation region can be visually observed. When the B-H curve tends to flatten, it indicates that the inductance has entered the saturation region.diode

2. Inductive measurement method

By measuring the self inductance value (L) of an inductor at different current levels, it is possible to determine whether the inductor is saturated. When the inductance is not saturated, its self inductance value remains relatively stable; Once saturated, the self inductance value will significantly decrease with the increase of current.diode

3. Transient response method

Inductance saturation can also be determined by analyzing the transient response of the circuit. There will be significant differences in the response of the circuit to input changes (such as voltage jumps) before and after inductance saturation. By observing the voltage across the inductor or the current response through the inductor, it is possible to determine whether the inductor has entered a saturation state.diode

4. Thermal imaging detection method

Inductance saturation usually leads to an increase in core loss and a rise in core temperature. The use of a thermal imager can visually detect the temperature distribution of the inductor core, thereby determining whether the inductor is saturated. Uneven temperature distribution or abnormal increase in core temperature are usually signs of inductance saturation.diode

Conclusion

Inductance saturation not only affects the performance of the circuit, but may also cause damage to the inductance, so it is crucial to timely and accurately determine whether the inductance is saturated. The above four techniques each have their own characteristics, and in practical applications, suitable methods can be selected based on the specific situation of the circuit and testing conditions. Understanding the physical mechanism of inductance saturation and monitoring it through effective detection techniques is of great significance for ensuring the safe and reliable operation of electronic devices.