What is a Transformer?
A transformer is an electrical device used to transfer electrical energy between circuits using electromagnetic induction. It can increase or decrease voltage levels.
Working Principle
Transformer works on Faraday’s Law of Electromagnetic Induction. When alternating current flows through the primary coil, it creates a magnetic field which induces voltage in the secondary coil.
Types of Transformers
| Feature | Step-Up Transformer | Step-Down Transformer |
|---|---|---|
| Voltage | Increases | Decreases |
| Turns | Secondary > Primary | Primary > Secondary |
| Use | Transmission | Home Appliances |
Advantages
- High efficiency
- Low maintenance
- Reliable and durable
- Essential for power transmission
Disadvantages
- Works only on AC
- Bulky in size
- Heat losses occur
Controls of Transformer
Transformers use control systems to maintain safety and efficiency:
- Tap Changer
- Cooling System
- Protection Relays
- Voltage Regulators
Applications
- Power transmission systems
- Electrical substations
- Home devices and chargers
- Industrial machines
Importance
Transformers are essential for modern electricity systems. They help transmit power efficiently and ensure safe voltage levels for homes and industries.