There are two techniques to modify the inductance size of a power supply.
The size of the inductance in the power supply can often be changed in one of two ways.
One technique involves moving the core within the coil using threaded soft ferrite;
Two: Alter the coil's number of turns using a slide switch to alter the inductor's inductance. These two approaches have the drawback of having moveable components that can only be adjusted manually and cannot be controlled automatically. The technique of merging the iron core and the line is employed in the particular power supply equipment to modify the inductor's inductance. The following three techniques are available.
a: Saturated inductance method
The iron core is wound with two windings: an AC working winding and a DC control winding. By adjusting the control winding's DC current's magnitude, the saturation level of the core may be changed, which in turn affects the working winding's equivalent inductance. This technique was developed quite early, and it serves as the foundation for saturated inductors and magnetic amplifiers.
b: switch control inductance method
A bidirectional thyristor switch is connected in series in the inductor circuit, and the equivalent inductance of the inductor is changed by turning on and off the bidirectional thyristor. This switch-controlled inductance technique is the foundation for numerous sinusoidal energy distributor-type AC regulated power supplies that have been studied, developed, and manufactured both domestically and abroad.
c: Orthogonal core control inductance method
Connect the two halves of the C-shaped iron core by rotating one half by 90 degrees. Half of the iron core is wound with a working winding to communicate with AC, while the other half is wound with a control winding to communicate with DC. The working winding's inductance can be continually altered by altering the DC current's size. It is employed in electric AC series compensators and phase shifters as well as switching power supplies, inverter power supplies, AC regulated power supplies, and so forth. This form of soft ferrite core with an orthogonal shape is known as SX core in Japan.
