Write 20 examples of primary transformers and 20 examples of secondary transformers

Examples of primary transformers:

1. Power distribution transformer
2. Instrument transformer
3. Autotransformer
4. Isolation transformer
5. Toroidal transformer
6. Variable frequency transformer
7. Ferrite core transformer
8. Control power transformer
9. Step-down transformer
10. High-voltage transformer
11. Step-up transformer
12. Current transformer
13. Potential transformer
14. Air core transformer
15. Audio transformer
16. Pulse transformer
17. Flyback transformer
18. Ballast transformer
19. Resonant transformer
20. EMI filter transformer

Examples of secondary transformers:
1. Transformer for electric vehicle charging
2. Transformer for HVAC systems
3. Transformer for audio amplifiers
4. Transformer for computer power supplies
5. Transformer for welding machines
6. Transformer for uninterruptible power supplies (UPS)
7. Transformer for lighting fixtures
8. Transformer for medical equipment
9. Transformer for telecommunications equipment
10. Transformer for power tools
11. Transformer for battery chargers
12. Transformer for industrial machinery
13. Transformer for LED displays
14. Transformer for data centers
15. Transformer for renewable energy systems (solar/wind)
16. Transformer for elevator control systems
17. Transformer for home appliances
18. Transformer for electronic devices
19. Transformer for security systems
20. Transformer for underwater applications