There are many types of electronic transformers, the following are some common types and their application scenarios:
1. ** Power transformer ** : widely used in a variety of electronic equipment, such as household appliances, computers, communication equipment, etc., but also used in industrial automation, robotics and medical equipment and other fields. It can not only provide a stable power supply, but also provide an isolated power supply to ensure the safety of electricity use;
2. ** Audio transformer ** : commonly used in audio equipment, playback equipment, wired broadcasting equipment and some input equipment (such as microphones, microphones, etc.). It plays the role of blocking noise, resisting magnetic field force, preventing sound input distortion, and reducing the audio frequency change, achieving "high truth" output, and maintaining the impedance adaptation between the entire line;
3. ** Pulse transformer ** : widely used in radar, switching technology, electronic circuits, digital circuits and distribution and control systems, etc., it is generally used in the switch of the power supply, used to give alternating current transformer, the signal frequency is higher;
4. ** Annular transformer ** : The main use is as a power transformer and isolation transformer, widely used in home appliances, computers, medical equipment, telecommunications, instruments, lighting and other aspects, such as audio equipment, electrical control (such as current and voltage transformers), medical equipment and various sizes of power inverter (such as solar energy, wind power generation system, etc.);
5. ** Three-phase transformer ** : It has a wide range of uses in industrial applications where single-phase transformers cannot meet their purpose;
6. ** Instrument transformers (including voltage transformers and current transformers) ** : Voltage transformers are used to measure high voltage in power systems using standard low-range voltmeters, and can be used to operate protection devices and relays, synchronous generators or equipment with the grid, protection feeders and long power line carrier communication circuits. The current transformer is used to measure the large current of the power system, which can convert the primary current into the required secondary current and be applied between the measuring instrument and the high-voltage power supply circuit to ensure the safety and correct operation of the operator.
7. ** High frequency transformer ** : It is an electronic component specially used for high frequency circuits, usually used to convert and regulate high frequency current and voltage. According to different application scenarios and technical requirements, high-frequency transformers can be divided into RF transformers, magnetic couplers, isolation transformers, frequency converters, tuning transformers and so on. RF transformers are used for impedance matching, filter amplification and coupling, etc., usually used in radio communication, radio, radar and television and other fields; Magnetic couplers are used in the fields of radio communication, industrial automation and medical devices. Isolation transformers are usually used in the fields of computer communication equipment and precision instruments. Frequency converter is used in inverter, UPS, electronic ballast and other fields; Tuning transformer is used in tuning circuit and filter circuit.
8. ** Automotive transformer ** : It only contains a winding shared by the primary and secondary circuits of the transformer, which can reduce the conductors and core materials required for construction, reduce ohms loss, improve efficiency, and the price is relatively low. Often used in automotive electronic systems;
9. ** Linear variable differential transformer (LVDT) ** : Used to measure the position and displacement of the object being observed, it is an electromechanical instrument that can respond to linear motion (an object) or position and convert it into the corresponding electrical signal;
10. ** Rotary Variable differential transformer (RVDT) ** : Used to respond to the angular displacement or rotational motion of the object being observed, similar to an LVDT, having a primary coil and two secondary coils whose output is an alternating current equivalent to (or relative to) the angular displacement of the object being observed. Commonly used in equipment that needs to measure Angle or rotation position, such as aerospace, machinery manufacturing, automation control and other fields;
11. ** Parameter converter ** : A special type of transformer that transmits power from the primary to the secondary without the use of mutual inductance coupling, but through the change of parameters in its magnetic circuit;
12. ** Rotary transformer ** : Used to couple the electrical signals between the primary and secondary windings, they rotate each other and the change in electrical characteristics is negligible. It is often used in automatic control systems, such as CNC machine tools, robots, aerospace and other fields, for measuring parameters such as rotation Angle and speed.

Different types of electronic transformers may differ in terms of structure, performance and application, and in actual use, the appropriate type of transformer needs to be selected according to the specific needs and circuit requirements.