Electrical transformers are essential to the modern power grid. They allow electricity to travel over long distances, supplying power for our homes, businesses and industries. It would be impossible to deliver electricity efficiently over large areas without transformers. How do they function? Learn about the science of energy conversion and transformers.
Basic Principles for Transformers
Transformers are based on the principle electromagnetic induction. Michael Faraday discovered this concept in the nineteenth century. Transformers convert voltage by using electromagnetic fields.
Transformers consist of two main parts: primary coils and secondary windings (or windings), and a magnet core. The primary coil connects to the power source and the secondary coil sends the voltage that has been altered to the output. These coils are arranged in a certain number of turns, which determines if the transformer is stepping up or down the voltage.
Step-Up vs. Step-Down Transformers
Transformers are divided into two types:
- Step-Up transformers: They increase the voltage of electrical current. Step-up transformers are used by power plants to increase the voltage of electricity for long distance transmission. It reduces the energy loss that could occur if the electricity was sent at lower voltages.
- Step Down Transformers: They reduce the voltage for safe consumption. Step-down transformers reduce the voltage of high-voltage electricity as it reaches your area. This makes it safer to use at home and in business.
How Transformers Work
The primary coil is surrounded by a magnetic field when alternating current (AC), flows through it. Due to AC power, this magnetic field is constantly fluctuating. This magnetic field induces current in the secondary winding as it cuts through the secondary coil. The voltage can be increased or decreased depending on the number turns in both the primary and secondary windings.
If the secondary coil is larger than the primary, then the transformer will act as a step up transformer and increase the voltage. In the opposite case, less turns in the secondary winding would lead to a step-down transformer, which lowers the voltage.
Transformers are unsung heroes in the world of electrical transmission. They ensure that electricity is transmitted safely and efficiently over long distances. Transformers convert voltage levels in order to power our homes, businesses, and industries without wasting energy.
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