A transformer is a device that changes the level of voltage, and its core function is to enable electrical energy to be transferred smoothly between different circuits. It works based on the principle of electromagnetic induction, allowing electricity to be transmitted efficiently over long distances and used safely by various equipment.
In practical applications, transformers are mainly used to step up or step down voltage to meet the needs of different transmission and usage stages. For example, electricity generated at a power plant needs to have its voltage “stepped up” very high so it can be sent farther with less loss along the way; when the electricity reaches near our homes, another transformer steps the voltage down to a safe and usable level, so that household appliances can operate normally without danger.
