Transformer

Transformer introduction

By using the principle of electromagnetic induction transformer to change the ac voltage devices, main component is the primary and secondary coil winding magnetic core (and). In electrical equipment and wireless circuit, used as lifting voltage, matching impedance, security isolated, etc.

Transformer function basically has: voltage transform; Current transform, impedance transformation, Isolation, (magnetic saturation voltage transformer); Self coupling transformer, High voltage transformer (dry and oil-immersed transformer) etc, the commonly used core shape usually have E type and C type, type, ED XED iron type CD type.

Transformer the end-use can be divided into: distribution transformer, electric power transformer and totally-sealing transformer, combined transformer, dry type transformer, single-phase transformer, electric furnace transformer, rectifier transformer, reactor, anti-jamming transformer, thunderproofing transformer, box BianDianQi test transformer corner transformer large current transformer excitation transformer.

The most basic type transformer, including two groups of wire coil around there, and each other by inductance way says close together. When a ac current (has a certain known frequency) - one coil, in another coil has the same frequency will sense the ac voltage, and the voltage induced depends on two coil coupling and into the degree of magnetic chain.

Generally refers to connect ac power coils of wire coil called it "a" (ask coil); And in this coil across the voltage called it "a voltage.". In secondary coil of inductive voltage may outweigh or less than a voltage, is by the first coil and secondary coil between "circle number than" of the decision. Therefore, the transformer is divided into two pressor with a step-down transformer.

Most of the transformer are fixed iron core, its around once and secondary coil. Based on the high guide magnetic iron materials, most directed flux limitations in core, therefore, two groups of coil through which can get quite high levels of magnetic coupling. In some transformer, coils and core between tightly integrated, one times and the ratio of secondary voltage with almost the same ratio coil circle number. Therefore, transformer, the circle number than can be generally as transformer pressor or step-down reference index. Since the booster and step-down function, make transformer has become one of important adjunct modernization power system, promote the voltage electricity to make long distance transmission more economical, as for a step-down transformer, it makes the power use more diversification, it can be said that no transformer, modern industrial solid cannot reach the present development status of.

Electronic transformer in addition to smaller outside, in power transformer and electronic transformer between, and no clear division. General electric power network provide 50Hz source are very huge, it could be covered half a continent area as large capacity. Electronic devices of power restriction, is usually limited rectification, amplification, and a system other components ability, including some partially amplification electricity the power system, but if the electricity generating capacity compared, it still belongs to the scope of small power. The isolated transformer

Various electronic equipment used to transformer, reason is: provide various voltage class to ensure normal operation system, Provide the system in several different potential operating part to electrical isolation, For ac current provide high impedance, but for dc provides low impedance, In different potentials, maintain or modify waveform and frequency response. "" one important impedance concepts, i.e., the feature of electronics is a kind of equipment, namely the preset when circuit module is a class to change from impedance to another class, meantime even use a device - transformer.

Transformer and its experiment and use, is the test transformer, can be divided into inflatable respectively, oil-immersed, dry type transformer is such experiment, power plants, PSB and scientific research institutions from the masses of users to do the basic communication compression experiment test equipment, through a national quality supervision bureau of standards, used for various electrical products, electric components, insulating material etc undertake provisions voltages insulation strength test

Transformer - using electromagnetic induction principle, from a circuit to another circuit relay electric or an electrical signals transmission is electricity transmission or as an important component of the signal transmission

1 transformer - static electromagnetic device

Transformer can be a voltage ac power transformation for the same frequency of another kind of voltage ac power

Voltage inverter main part is a core and set in the core of the two windings.

Transformer principles

With power connected coil, receiving communication power, called a winding

And load connected coil, send out communication power, called the secondary winding

A winding of secondary winding

Voltage phasor U1 voltages are adjustable phasor U2

Current phasor I1 current phasor I2

Emf phasor E1 emf phasor E2

Circle number N1 N2 circle number

At the same time pay chain once, secondary winding directed flux of phasor for phi m, this mainly directed flux says flux

Transformers group

Transformer components including implement body (iron core, winding, insulating, fuses), transformer oil, fuel tanks and cooling device, pressure regulating devices, protective device (hygroscopic device, safety airway, gas relay, storage ark and temperature measuring devices, etc) and qualify casing.