About Transformers

It’s an electromagnetic device that transfers energy from one electrical circuit to another by magnetic coupling. It’s often used to convert between high and low voltages and accordingly between low and high currents.

Every transformer is consisting of a primary coil and one or more secondary coils.

The primary is fed with a varying alternating electric current that creates a varying magnetic field of voltage around the conductor. According to the principle of mutual inductance, which is a special case of electromagnetic induction applied to two coupled conductors, the secondary, which is placed in this varying magnetic field, will develop a potential difference called an electromotive force (EMF). If the ends of the secondary are connected together to form an electrical circuit this EMF will cause a current power fed into the primary is delivered to the secondary.

Convert DC to AC or vice versa
Change the voltage or current of DC
Change the frequencyof AC. (For example, transformers cannot convert 50 Hz to 60 Hz or vice versa.)

Power transformers convert power-level voltages from one level or phase configuration to another. They can include features for electrical isolation, power distribution, and control and instrumentation applications.

Audio transformers are involved in the transmission of voice or sound signals; they often require wide frequency bandwidth with low distortion and noise suppression.