How many types of transformer are there
Post Time: 2024-08-31 16:27:58
Power transformers , also known as power transformers, are commonly used in power systems and electronic circuits. In terms of transmission, when the transmission power and load power factor cosφ are constant, the higher the voltage U, the smaller the line current.
This reduces the size and material of the transmission line, as well as decreasing power losses. Therefore, a step-up transformer must be used to increase the voltage during transmission. To use electricity safely, you need a step-down transformer to reduce the voltage for your electrical equipment.
In electronic circuits, besides power transformers, transformers are also used to couple circuits, transmit signals, and achieve impedance matching. There are many types of transformers, but their structure and working principles are fundamentally the same. Transformers are composed of the following two parts:
1.The iron core in a transformer can be either core-type or shell-type. This classification is based on its structure. The core forms the magnetic circuit part of the transformer.
2.The high and low windings constitute the electrical circuit part of the transformer. Small transformers use enameled wire, while large transformers use flat copper and aluminum wire.
Type of transformer
1. according to the use of classification
Power transformer:
Description: Power transformers use electromagnetic induction to adjust AC voltage levels for various loads. Power transmission and distribution systems use them to adjust voltage for long-distance power distribution.
Examples: step-up transformer, step-down transformer.
Distribution transformer:
Description : Used to transmit power from an industrial distribution system to the end-user, usually installed near the user at a lower voltage level.
Power Supply Transformer:
DESCRIPTION: Used in electronic equipment and power systems to provide a stable supply voltage, commonly found in electronic appliances, chargers and voltage regulators.
Instrument Transformer:
●Current Transformer (CT): Used to measure high currents and convert large currents into small currents for use in measuring instruments.
●Voltage transformer (PT): used to measure high voltage, high voltage into low voltage for measuring instruments.
Specialty Transformers:
● Description: transformers used for specific applications.
● Examples: welding transformers, rectifier transformers, furnace transformers, variable transformer.
Medical Transformers:
●Description: Used in medical equipment to provide safe and stable power supply with high safety and low leakage current.
2. Categorized according to structure
Autotransformer:
Description: Primary and secondary winding parts share a common winding, provide voltage conversion through the tap, small size, light weight, low cost.
Isolation transformer:
Description: primary and secondary winding completely electrically isolated, mainly used for safety and anti-interference, widely used in medical equipment, audio system, etc..
Toroidal transformer:
Description: Adopting toroidal iron core, characterized by low magnetic leakage, high efficiency and low noise, widely used in audio equipment, power supply equipment and so on.
Dry type transformer:
Description: windings and core are not immersed in insulating oil, rely on air convection cooling, high safety, suitable for fire requirements of high places.
Oil-immersed transformer
Description: is a kind of transformer windings and iron core immersed in insulating oil transformer
3. Classified according to the number of phases
Single-phase transformer:
Description: only a primary winding and a secondary winding, for single-phase power systems.
Three-phase transformer:
Description: has three primary windings and three secondary windings, used in three-phase power systems.
4. According to the function classification
Traveling light transformer:
Description: Used to provide low-voltage power to mobile lighting equipment to ensure the safety of use.
Control transformer:
Description: Used for electrical control equipment to provide stable low-voltage power supply.
