What is the difference between the application of high frequency transformers and ordinary transform

The former operates at a higher frequency, resulting in a smaller number of coils and uses a ferrite core.

In the bridge transformer circuit, the "high-frequency transformer" is often the main transformer, and the "drive transformer" is used for the insulation coupling between the low-voltage drive stage and the high-voltage power stage, which also works at high frequency and is a ferrite core. The "auxiliary transformer" is mostly an ordinary power frequency transformer, with small power, which provides power for the drive stage and control circuit.

1. The difference between magnetic materials: the power frequency transformer uses silicon steel sheet as the core material; High-frequency transformers are made of ferrite core material.

2. The difference in working frequency: the working frequency of the power frequency transformer generally refers to the power supply frequency of 50Hz and 60Hz; The working frequency of high-frequency transformers is generally above 1kHz, or even tens of kHz or hundreds of kHz, and the application range is different for different frequencies.

3. Application: Power frequency transformers are generally used to convert 220V or 110V power frequency high voltage into power frequency low voltage for power supply of small household appliances (such as soybean milk machine, range hood, audio, etc., with a wide range of applications; High-frequency transformers are used in a wide range of applications (e.g.; Mobile phone chargers, electronic ballasts, switching power supplies, color TV power supplies, computer power supplies, LCD drivers and power supplies and many other occasions are used).

First, the types are different.

1. High-frequency transformer: It is a power transformer with a working frequency exceeding the intermediate frequency (10kHz).

2. Ordinary transformers: according to their uses, they can be divided into: 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, reactors, transformers, etc.).

Second, the functions are different.

1. High-frequency transformer: mainly used as a high-frequency switching power supply transformer in high-frequency switching power supply, and also used as a high-frequency inverter power transformer in high-frequency inverter power supply and high-frequency inverter welding machine.

2. Ordinary transformer: power transformer: used for the rise and fall voltage of the transmission and distribution system.

Instrument transformers: such as voltage transformers, current transformers, measuring instruments and relay protection devices. Test transformer:

It can generate high voltage and conduct high voltage tests on electrical equipment.

A high-frequency transformer is a specialized electronic component that converts the input voltage into high-frequency alternating current and is used in many high-frequency electrical training equipment and applications. Common uses include:

1.Power supply: High-frequency transformers can be used in various types of power supplies, such as televisions, computers, lighting equipment, household appliances, industrial equipment, etc. They are capable of converting the input supply voltage to a high-frequency voltage suitable for the device's use.

2.Communication: High-frequency transformers are also widely used in wireless communication systems, such as mobile phones, wireless local area networks (WLAN), baseband circuits, etc., which can help devices transmit input and output signals at different frequencies.

3.Automotive electronics: High-frequency transformers are also used in automotive electronic systems, such as engine controllers, entertainment systems, air conditioning systems, and lighting systems, to achieve efficient energy consumption for various equipment in the vehicle.

All in all, high-frequency transformers are widely used in many electronic devices and applications, especially some equipment and systems that require high-efficiency, high-frequency, and high-precision power supplies. Worthy of shouting.

High-frequency transformers are the most important components of switching power supplies. There are many topologies in switching power supplies. For example, in the half-bridge power conversion circuit, the two switching transistors take turns to generate a high-frequency pulse wave of 100kHz, and then transform the voltage through the high-frequency transformer to output alternating current, and the ratio of the number of turns of each winding coil of the high-frequency transformer determines the amount of output voltage.

The most conspicuous in the typical half-bridge transformer circuit are three high-frequency transformers: the main transformer, the drive transformer and the auxiliary transformer (standby transformer), each transformer has its own measurement standard in the national regulations, such as the main transformer, as long as it is a power supply of more than 200W, its core diameter (height) shall not be less than 35mm. The auxiliary transformer, when the power supply power does not exceed 300W, its core diameter reaches 16mm.

How it works. A transformer is a device that converts AC voltage, current and impedance, and when there is an AC current in the primary coil, an AC magnetic flux is generated in the core (or core), so that the voltage (or current) is induced in the secondary coil.

The transformer is composed of an iron core (or magnetic 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 secondary coils.

<> there is a difference between a high-voltage device and a transformer, and a high-voltage electrical appliance is a device used to close, break, protect, control, regulate and measure in a high-voltage line. General high-voltage electrical appliances include switching appliances, measuring appliances and current limiting and voltage limiting appliances. The internationally recognized dividing line between high and low voltage electrical appliances is 1kV AC (1500V for DC).

AC above 1kV is a high-voltage electrical appliance, and 1kV and below are low-voltage electrical appliances. Transformers are sometimes included in the list of high-voltage appliances. The variable voltage 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 (magnetic core).

The main functions are: voltage conversion, current conversion, impedance conversion, isolation, voltage regulation (magnetic saturation transformer), etc.

Hello, glad to answer for you. The difference between a variable frequency transformer and an ordinary transformer is. "For the general inverter, the transformer in front of the inverter is followed by the rectifier of the inverter, and the current waveform of the rectifier contains large harmonics.

Inverter rectification mainly includes diode rectification and IGBT rectification. The latter has smaller current harmonics. The former has a larger harmonic current.

Diode rectification is divided into 6-pulse rectification, 12-pulse rectification, 24-pulse rectification, etc. The higher the number of pulses, the smaller the harmonic current. The transformer whose output is connected to a diode rectifier circuit is generally called a rectifier transformer.

The harmonic current will increase the harmonic loss of the rectifier transformer, resulting in an increase in the heat of the core, so when ordering a rectifier transformer, you need to find a professional manufacturer and make a special statement. ”

Are these two things comparable in different places? Power frequency transformer is used for 50Hz AC transformer, high-frequency transformer is widely used, radio transmitter, radio, high-frequency heating, switching power supply, etc. can see the figure of high-frequency transformer.

1. The power frequency transformer is bulky, large in size and low in efficiency. However, the waveform is not distorted, and the circuit is simple, so the internal act rate is low.

2. The high-frequency variable pressure converter is light, small and has high efficiency. The reduction to a sine wave is distorted and the circuit is complex. The failure rate is high.

3. Relatively speaking, high-frequency transformers have greater advantages.

4. In general, whether it is electronic or electrical, the high-frequency transformer is the trend. However, with the existing technology, high-frequency transformers cannot completely replace power-frequency transformers, especially high-power and power transformers.

The basis of the inverter is a set of thyristor inverter, which is the principle of learning the AC speed regulation circuit of the thyristor inverter. The reason is that its protection circuits and frequency conversion drives are controlled by the microprocessor, and the input instructions and output controls can also be displayed. It is the implementation of numerical control for the inverter circuit, and the internal program has CPU, RAM, ROM storage and instructions, and some functions can also be done through buttons.

In fact, it is a reliable output AC device, and he must ensure that the frequency of the output voltage is qualified.

The transformer is a device that changes the voltage, that is, the 220 thousand volt substation is changed to 110 thousand volts, 10 thousand volts and then 220 volts, which is the electricity conversion equipment that we usually use.

Inverter: through which the frequency of electricity consumption (50Hz, 60Hz, etc.) is reached, to meet our special needs for electricity consumption.

Transformer: It is a "voltage regulator", near the community or near the factory, its function is to drop the ultra-high voltage to the normal electricity voltage of our residents to meet people's daily electricity consumption.

Hello:——1. [Inverter]: The inverter can change the frequency, [at the same time, it also changes the voltage accordingly].

This is because when the frequency of an inductive load (such as an electric motor) decreases, the inductive reactance also decreases, and the voltage must be reduced at the same time to prevent the current from exceeding the rated value! When it was first introduced in the last century, the inverter used for frequency modulation, voltage regulation, and speed regulation devices was called "triple V technology", which is the reason.

2. [Transformer]: As the name suggests, a transformer is a device that changes the voltage. Transformers are generally used at specific frequencies (such as power frequency, or high frequency). When used as a change voltage, the frequency is constant, which is its distinctive feature.

Literally: the former converts the frequency, and the latter transforms the voltage.

Structurally speaking: the former is a complex electronic device, the latter is a relatively simple device.

In terms of working principle:

Inverter: First, the input AC rectification is filtered, and the control circuit outputs a modulation signal according to the demand, which controls the conduction and closure of the power output tube (generally a half-bridge or a full-bridge), and obtains the corresponding output frequency by changing the on-on and off-time.

Transformer: In the general sense, the transformer is a component composed of multiple coil windings and magnetic cores, after applying AC voltage on one of the windings, an induced voltage will be generated on the other winding, the voltage ratio is the ratio of the number of turns of the winding, the main peak of the output frequency is the same as the input, and the harmonics are mainly even.