Three-phase transformer principle I'll tell you, the current domestic large-capacity three-phase transformer is generally used three-phase five-post core structure, its structure can effectively reduce its transportation height, which can reduce its own cost. Three-phase transformer principle it is time for us to learn, three-phase transformer principle which is formed between the columns of axial heat dissipation oil channels, the core to form four independent boxes, magnetic flux according to the influence of the box to form a circuit. This is something I find very interesting! Continue to explore it!
A three-phase transformer is a combination of three single-phase transformers of the same capacity. There are three core columns, three-phase electricity is generated equal amplitude, equal frequency, phase difference 120 ° potential generator is called a three-phase generator; three-phase generator as a power source, known as the three-phase power supply; three-phase power supply to power the circuit, known as the three-phase circuit. u, v, w is called the three-phase, the voltage between the phase and the phase is the line voltage, the voltage is 380V. between the phase and the center line is called the phase voltage, the voltage is 220V.
Principle of operation of the analytical plan
Transformer is a transformer to change the AC voltage, current and impedance of the device, when the primary coil with AC current, the iron core (or core) in the AC flux is generated, so that the secondary coil induces a voltage (or current). Transformer by the iron core (or core) and coil composition, the coil has two or more windings, which is connected to the power supply winding called primary coil, the rest of the winding called secondary coil.
Transformer parameter variables
Views: three-phase transformer parameter variables a few non-major variables of note, three-phase transformer parameter variables
1, the amount of power: in the frequency and voltage, the current transformer characteristics of the sign of the parameter variables
2, the amount of voltage: the political in the transformer's coils of the voltage promised. Transformer can work for a long time, and not over the temperature rise of the output power.
3, voltage ratio: refers to the ratio of transformer high voltage and secondary voltage, no-load voltage ratio and load voltage ratio difference.
4, do frequency: the pressurized iron core injury consumption with frequency relationship is very big, so according to the use of frequency to envision and use, that kind of frequency is called work frequency.
5, rate: refers to the secondary power P2 to primary power P1 ratio of the percentage. As long as the transformer's rated power the greater, the higher the rate. 6 no-load injury refers to the transformer when the secondary open, is higher measured power injury. Non-major injury is the core injury, followed by no-load current is the original coil copper resistance to the injury occurred (copper loss) that the department of injury is small.
6, load current: three-phase transformer secondary open when the dry cleaners to join.doc higher still no certainty of the current, that sector of the current is called no-load current. No-load current by the magnetization current (flux) and iron loss current (caused by iron core injury). For 50Hz current transformer, the no-load current root level is higher than the magnetizing current.
7, edge resistance: privately indicate the transformer between the coils, between the coils and core insulation function. Insulation resistance of the bump with the use of insulation material function, temperature bump and moisture level.
Use conditions
1, applicable altitude: ≤ 5000 ;
2, ambient temperature: -15 ℃ ~ +45 ℃ ;
3, relative humidity: ≤ 90% ;
4, the place of installation should be free of serious impact on the transformer's insulation strength of the gas, steam, chemical deposits, dirt, conductive dust and no other explosive and flammable corrosive substances;
3, the installation site should be free of gas, steam, chemical deposits, dirt, conductive dust and no other explosive and flammable substances. Corrosive substances;
5, does not meet the above conditions of use, should be determined in consultation with us;
6, according to the user's requirements for the careful design and manufacture.
Application scope:
Three-phase transformer products are widely used in industrial and mining enterprises, textile machinery, printing and packaging, petrochemical industry, schools, shopping malls, elevators, post and telecommunications communications, medical machinery, office equipment, test equipment, industrial automation equipment, household appliances, high-rise buildings, machine tools, tunnels, power transmission and distribution and imported equipment, and so on all the occasions that need to be guaranteed by normal voltage.
Through my analysis of the principle of three-phase transformers you can understand the three-phase four-frame five-pillar core and conventional core in the magnetic circuit of the respective characteristics of where. Conventional structure is a three-phase transformer mature structure but the frame structure in the cost has a greater advantage, while the frame structure is also the field assembly type transformer core must be taken as one of the type, so in the future design of three-phase transformers can be based on the actual needs of the product selection.
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