Basic guide to boost transformers

Time：2024-12-16    Auther：ZTelec-www.ztelectransformer.com

A step-up transformer, also known as a variable frequency transformer, is a type of power device that is mainly used to change the magnitude and frequency of voltage. The step-up transformer usually has a large iron core and winding to adapt to the high voltage and high current working environment. Its winding is usually made of copper or aluminum, which has high electrical conductivity and mechanical strength. At the same time, in order to ensure the insulation and heat dissipation performance of the transformer, insulation and heat dissipation materials will be filled between the winding and the winding and the iron core.

The function of step-up transformers 

Boost voltage: The step-up transformer can increase the input voltage to the required output voltage to meet the needs of different occasions.

Energy saving: By increasing the voltage and reducing the current, the line resistance loss can be reduced to achieve energy saving effect.

Control current: By changing the voltage of the input signal, the electrical energy transmission in the circuit can be accurately regulated and controlled.

Protection circuit: Some sensitive electronic devices need corresponding protection during use. And the step-up transformer can provide a stable power supply for them to play a protective role.

Working principle

The working principle of the step-up transformer is based on the law of electromagnetic induction. When the primary side winding (i.e. the input winding) is switched on, an alternating magnetic field is generated in the core. This magnetic field passes through the secondary side winding (the output winding) and creates an induced electromotive force in the secondary side winding. Since the number of turns in the secondary side winding is more than that in the primary side winding, the voltage value of the induced electromotive force will be higher than that of the primary side winding, so as to realize the voltage increase.

Classification of step-up transformers

Step-up transformers are mainly divided into two categories: dry step-up transformers and oil-immersed step-up transformers. Dry step-up transformer refers to the transformer that uses dry material as the insulating medium inside, and is often used in indoor places. An oil-immersed step-up transformer is a transformer filled with a specific insulating oil, and is usually used in outdoor locations. The basic principle and application of the two types of transformers are the same, but they need to be selected according to the specific situation when used.

Application scenario

Power industry: In the power generation process, after the power plant generates electricity through the generator, the step-up transformer is used to increase the voltage so that the electricity can be more efficiently transmitted over long distances through the transmission line. In the transmission link, transformers are often needed to carry out voltage conversion between transmission lines with different voltage levels.

Industrial field: In the manufacturing industry, there are a large number of production equipment in enterprises such as steel plants, machinery plants, chemical plants, etc., which have higher requirements for voltage stability and adaptability. The transformer can be adjusted according to the voltage requirements of different devices to ensure the normal operation of the equipment.

Transportation industry: The traction power supply system of high-speed trains such as high-speed rail and bullet trains requires a large number of transformers to achieve voltage transformation and power transmission. At the same time, urban rail transit, such as subway and light rail, also needs transformers to ensure the normal operation of the power supply system.

Construction industry: Whether it is a residential community, commercial office buildings or large public buildings, transformers need to be installed during the construction process. Transformers can convert high-voltage electricity from the grid into low-voltage electricity suitable for various users, so as to ensure the safe and stable supply of power.

Communication industry: Transformers play the role of isolation and filtering in the communication network to ensure the normal operation of communication equipment. At the same time, transformers can also be used to stabilize the voltage output, such as autotransformers in regulators.

Daily maintenance of step-up transformer

In order to ensure the normal operation and extend the service life of the step-up transformer, the following daily maintenance work is required:

Temperature detection: Periodically detect the temperature of the transformer, especially the temperature rise. Excessive temperature rise may be a manifestation of poor internal heat dissipation of the transformer, which needs to be dealt with in time.

Insulation test: Periodically test the insulation resistance to check whether the insulation is normal. If the insulation resistance is too low, the insulation may be aging or the insulation material is damaged, which needs to be repaired or replaced.

Oil quality testing: For oil-immersed transformers, the quality of transformer oil needs to be regularly tested, which includes electrical properties, physical properties and chemical properties of oil. If the oil is abnormal, it may be because the oil contains impurities or arc burns and other problems. And the oil needs to be filtered or replaced.

Cooling system check: Periodically check the operation of the cooling system, including fans, cooling pipes, and radiators. Ensure the normal operation of the cooling system and ensure the good heat dissipation effect of the transformer.

Cleaning and maintenance: Clean the transformer regularly, including external and internal cleaning. External cleaning removes dust and debris, while internal cleaning allows regular replacement of oil seals and cleaning of the cooling system.

Maintenance of anti-corrosion coating: Check the anti-corrosion coating of the transformer regularly. If it is found to be damaged or peeling, it should be repaired in time to prevent moisture and corrosion from eroding the transformer.