The assembly principle of the transformer The working principle

The working principle of the transformer is as follows:

The transformer is composed of an iron core and a coil, the coil has two or more windings, of which the winding connected to the power supply is called the primary coil, and the rest of the windings are called the secondary coil. It can transform AC voltage, current, and impedance.

The function of the core is to strengthen the magnetic coupling between the two coils. In order to reduce eddy currents and hysteresis losses in the iron, the core is made of painted silicon steel sheets. There is no electrical connection between the two coils, and the coils are wound by insulated copper wires. One coil connected to the AC power source is called the primary coil, and the other coil is connected to the electrical appliance called the secondary coil.

The actual transformer is very complex, and there are inevitably copper loss, iron loss, and magnetic flux leakage, etc., in order to simplify the discussion, only the ideal transformer is introduced here. The conditions for the establishment of an ideal transformer are: ignoring the leakage flux, ignoring the resistance of the primary and secondary coils, ignoring the loss of the core wood, and ignoring the no-load current.

The transformer is a device that uses the principle of electromagnetic induction to change the AC voltage, and the main components are the primary coil, the secondary coil and the iron core. The main functions are: voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization, etc.

Transformers can be divided into power transformers and special transformers according to their uses: power transformers and special transformers (electric furnace transformers, rectifier transformers, power frequency test transformers, voltage regulators, mining transformers, audio transformers, intermediate frequency transformers, high-frequency transformers, impact transformers, instrument transformers, electronic transformers, reactor cavity fibers, transformers, etc.). Circuit symbols often start with t.

Example: T01, T201, etc.

The role of the control transformer:

Easy access to the right voltage; The secondary is strictly forbidden to be grounded; Anti-interference. The control transformer is mainly suitable for AC 50Hz (or 60Hz), voltage 1000V and below circuits, and can work continuously for a long time under the rated load.

It is usually used in machine tools and mechanical equipment as a power supply for control lighting and indicator lights for electrical appliances. Working principle: The control transformer is excavated and started by the principle of electromagnetic induction.

A transformer has two sets of coils. Primary and secondary coils. The secondary coil is on the outside of the primary coil.

When the primary coil is connected with alternating current, the transformer core generates an alternating magnetic field, and the secondary coil generates an induced electromotive force. The turn-to-stool ratio of the coil of a satons transformer is equal to the voltage ratio.

The control transformer is used to change the setting of the AC voltage and is made of wire core and coil. It not only changes the voltage of the alternating current, but also the impedance and, when the design power is not exceeded, the current can be changed. In different environments, the use of transformer judgment is also different.

The working principle of the transformer: The transformer mainly uses the principle of electromagnetic induction to work. When the AC voltage U1 is applied on the primary side of the transformer, and the current flowing through the primary winding is not chaotic as I1, the current will generate alternating magnetic flux in the core, so that the primary winding and the secondary winding will have an electromagnetic connection.

According to the principle of electromagnetic induction, the alternating magnetic flux will induce an electromotive force when it passes through these two windings, and its magnitude is proportional to the maximum value of the number of winding turns and the main magnetic flux; The voltage is high on the side with more windings and low on the side with fewer turns. When the secondary side of the transformer is open, that is, when the transformer is unloaded, the voltage of the primary and secondary terminals is proportional to the number of turns of the primary and secondary windings, so as to realize the change of voltage.

A transformer is a device that uses electromagnetic mutual inductance to transform voltage, current and impedance. There are also many types of it, classified according to the cooling method: dry-type (self-cooling) transformers, oil-immersed (self-cooling) transformers, fluoride (evaporative cooling) transformers.

Classified according to moisture-proof methods: open transformers, potted transformers, sealed transformers, etc. What it does:

1. Ensure the safety of electricity and meet the needs of various electrical teams. 2. Use transformer to reduce high voltage. 3. The transformer also has the function of converting the current.

4. The transformer also has the function of transforming impedance.

The working principle of the transformer is a must for professionals to understand, and every detail of the processing state key friend can better achieve the expected effect, especially when choosing. Zhongda Consulting will explain to you the working principle of the transformer.

We call the side of the transformer connected to the power supply as the primary side, also called the primary side; The primary side coil is called a primary coil, also called the original coil. The side of the transformer that is connected to the load is called the secondary side, which is also called the secondary side; The secondary side coil is called the secondary coil, also called the secondary coil.

A transformer is an electrical device that works according to the principle of electromagnetic induction. The two coils of a single-phase transformer are wound around an iron core, and the secondary side is open and the primary side is applied with an AC voltage U1, then a current i1 flows through the original coil and generates a magnetic flux in the core. The magnetic flux passes through the secondary coil and closes in the core, inducing an electromotive force e2 on the secondary side

When the secondary side of the transformer is connected to the load, there will be a current i2 passing through under the action of the electromotive force e2, so that there will be a voltage drop u2 at both ends of the load, u2 is about equal to e2, and u1 is about equal to e1, so.

u1/u2=e1/e2=n1/n2=k

In the formula, U1 and U2 are the terminal voltages of the primary and secondary coils, N1 and N2 are the turns of the primary and secondary coils, and K is the transformation ratio of the transformer. As can be seen from the above equation, due to the different turns of the primary and secondary coils of the transformer, it plays the role of converting the voltage.

The working principle of the transformer is as follows:Satons transformers mainly apply the principle of electromagnetic induction to work. Specifically:

When the primary side of the transformer applies the alternating voltage U1, and the current flowing through the primary winding is i1, the current will produce alternating magnetic flux in the iron core, so that the primary winding and the secondary winding have electromagnetic contact, according to the principle of electromagnetic induction, the alternating magnetic flux will induce electromotive force through these two windings.

Its size is proportional to the number of winding turns and the maximum value of the main magnetic flux, the voltage on the side with more winding turns is high, and the voltage on the side with fewer winding turns is low, when the secondary side of the transformer is open, that is, when the transformer is no-load, the voltage at the primary and secondary ends is proportional to the number of turns of the primary and secondary windings, that is, u1 u2=n1 n2, but the primary and secondary frequency beams are consistent, so as to achieve the change of voltage.

Technical parametersThere are corresponding technical requirements for different types of transformers, which can be expressed by corresponding technical parameters. For example, the main technical parameters of power transformer are: rated power, rated voltage and voltage ratio, rated frequency, working temperature grade, rubber dust temperature rise, voltage regulation, insulation performance and moisture-proof performance.

The main technical parameters for general low-frequency transformers are: transformer ratio, frequency characteristics, nonlinear distortion, magnetic shielding and electrostatic shielding, efficiency, etc.

The above content refers to: Encyclopedia - Transformer Principle.