loading

Is specialized in designing, manufacturing for power transformers ,furnace transformers and reactor.

Function of Power Transformer_ Selection Principle of Power Transformer

What is a power transformerPower transformer is a kind of soft magnetic electromagnetic component. Its function is power transmission, voltage conversion and insulation isolation. It is widely used in power supply technology and power electronics technology. According to the transmission power, the power transformer can be divided into several grades: above 10KVA is high power, 10KVA 0.5kva is medium power, 0.5kva 25VA is low power, and below 25VA is micro power. The design of power transformer is different with different transmission power, which should be self-evident.Function of power transformer

Function of Power Transformer_ Selection Principle of Power Transformer 1

For the transformer, it is actually a device that can convert voltage. We usually call it a power transformer. But the difference between switching power transformer and other transformers is that it has one more switch tube than ordinary transformer. In this way, a self-excited intermittent oscillator is formed. Its function is to adjust the input DC voltage into high-frequency pulse voltage and then output.In addition to the above functions, this product also plays a more important role, that is, the transmission and conversion of energy. Generally, in the flyback circuit, when we turn on the switch, the corresponding transformer will convert electric energy into magnetic field and store it. When we turn off the switch, on the contrary, the magnetic field will be converted into electric energy.Power transformer is often used in some electronic products. Its principle is simple, but the winding process of transformer will also have different requirements according to different application occasions (different uses). Although it is only one of the transformers, it is a transformer widely used in life. This transformer can be divided into four categories according to its purpose.

1. Step down transformer: step down transformer is a transformer that converts the high voltage at the input into low voltage.2. Step up transformer: the step-up transformer is a transformer that converts the low value alternating voltage into another high value alternating voltage with the same frequency.3. Isolation transformer: it can be understood literally that separating voltage means isolating strong current or weak current in application.

4. Multi winding transformer: multi winding transformer has several independent secondary windings, and the secondary voltage is different. It can be lower than the primary voltage or equal to or higher than the primary voltage.Selection principle of power transformer for frequency converter(1) Selection purpose. If the grid voltage is not the quantity level required by the frequency converter, the high-voltage power supply can be converted to the voltage level required by the general frequency converter by using the power transformer.

Even if the grid voltage is the quantity level required by the frequency converter, in order to reduce the impact of the frequency converter on the grid, the power can be isolated by adding a transformer, and the input voltage and output voltage of the isolation transformer are the same.(2) Method for determining the capacity of power transformer. The input current of the frequency converter contains a certain amount of high-order harmonics, which reduces the power factor at the power side. If the operation efficiency of the frequency converter is considered, the capacity of the transformer is usually considered according to the following formula:Capacity of transformer (kV · a) = (output power of frequency converter / input power factor of frequency converter) Frequency converter efficiency

Function of Power Transformer_ Selection Principle of Power Transformer 2

Where, the power factor of the frequency converter is 0.8 0.85 when there is input AC reactor Al, and 0.6 0.8 when there is no input reactor al; The efficiency of frequency converter can be taken as 0.95; The output power of the frequency converter shall be the total power of the connected motor.

GET IN TOUCH WITH Us
recommended articles
Case News
1 What are the advantages and disadvantages of machine winding and manual winding in the manufacture of transformer?The advantages of machine wound transformer are h...
Transformer winding machine is a special equipment used to wind transformer coils. In the process of transformer coil production, winding equipment is divided accord...
Comparison of power transformers:1 What are the advantages and disadvantages of machine winding and manual winding in the manufacture of transformer?The advantages o...
Working principle of power transformerAs for the power transformer, it is a special transformer whose output and input share a set of coils. The step-up and step-dow...
Introduction to working principle of power transformerThe high-voltage winding used in domestic transformers is generally connected into Y connection method, and the...
Operation principle of power transformer1. Operating temperature of transformerDuring the operation of the transformer, copper loss and iron loss will be generated, ...
Inspection during operation of power transformer(1) The on-site meter indication of the upper oil temperature and high and low winding temperature of the transformer...
Maintenance technology of on load tap changer of power transformer1 basic principle and structure of on load tap changer on load tap changer is an electrical device ...
1. Basic working principle of gas protectionWhen a fault occurs inside the power transformer oil tank (including the grounding short circuit through arc resistance c...
Switching power transformer is a power transformer with switch tube. In the circuit, in addition to the voltage conversion function of ordinary transformer, it also ...
no data
As a professional power transformer manufacturer with 20 years of experiences, NINGBO VILLE ENTERPRISE is a combination of Transformer R&D center, production, sales and after sales service, possesses of strong technical strength and excellent manufacturing equipments, as well as modern Office facilities.
no data
PLEASE CONTACT US.
Contact person:  GREEN HSU
Contact number:  +86-13906684456 / +86-13867838839
WhatsApp:008613867838839 / 008613906684456

Add: Fl 6, No.C12 Building, Lane 299 Guanghua Rd, Ningbo R&D Park,Ningbo Hi-Tech Zone,China, 315040

Copyright © 2023 NINGBO VILLE ENTERPRISE CO.,LTD. - https://www.villeelectric.com/ | Sitemap
detect