In electronics, transformers and inductors are two important devices. There is a common misconception that these are the same because their construction and appearance are similar. However, they differ in a variety of ways, including applications, design, and construction elements, among others. This post will introduce you to some of the key differences between these two magnetic components.

Differences between Transformers and Inductors

The following points will assist you in understanding the significant differences between the two, allowing you to make an informed purchasing decision. 

Let's start with transformers.

  1. Transformers are made up of two coils of insulated wires wound around a ferrite, iron, or steel lamination core. 
  2. Transformers' primary functions include converting high-voltage AC to low-voltage AC and vice versa. 
  3. Transformers are made up of primary and secondary coils. When the primary coil is connected to an alternating current source, a constantly varying magnetic field is created around the ferrite/iron/steel core. As a result, an alternating current is produced in the secondary coil. When connected to a separate electric circuit, the secondary coil produces an output.
  4. These devices are widely used in LED lighting, power conversion for commercial and medical applications, as well as high voltage (HV) and electrostatic spraying applications. 
  5. Step up, step down, auto transformers, power transformers, and toroid core transformers are the most common types of transformers. 

Let us now move on to inductors.

  1. Inductors are electrical components that are not active. They are also referred to as a coil or a choke. Inductors are made up of insulated magnet wire wound into a coil. 
  2. One of the primary applications is to provide a specific amount of inductance in a circuit. 
  3. When current flows through the coil, it temporarily stores energy in the magnetic field (core material varies from iron, ferrite, iron powder, amorphous, and other high reluctance materials) and the conductor can be insulated enamelled wire, copper foil strips, or high voltage insulated lead wire depending on the application). According to Faraday's Law, when the current passing through the coil changes, a voltage is created.
  4. Air core, powdered iron core, ferrite core, and choke inductors are the most common types of inductors. 

Despite their similar appearance, transformers and inductors serve distinct functions in electronic applications. Speak with your custom transformer manufacturers to gain a better understanding of the key differences. The manufacturer can assist you in learning more, which will allow you to better specify your requirements to the manufacturer. 

Alisha Coils and Transformers, is a market leader in the production of custom transformers, inductors, and other specialty magnetic components. You can also freely ask the Alisha Coils and Transformers team questions such as the one discussed here, 'Differences between Transformers and Inductors.