Air Compressor Inverter

The principle of the frequency converter is to apply the principle of frequency conversion technology and microelectronics technology to control the power control equipment of the AC motor by changing the frequency of the motor’s working power supply.

The power supply we use is divided into AC power supply and DC power supply. The general DC power supply is mostly obtained by transforming the AC power supply through a transformer, rectifying and filtering. AC power accounts for about 95% of the total power used by people.

Whether it is used for home or factory, the voltage and frequency of single-phase AC power supply and three-phase AC power supply have certain standards according to the regulations of various countries. For example, in mainland my country, the single-phase AC voltage of direct users is 220V, and the three-phase AC power line voltage is 380V and frequency is 50Hz. The voltage and frequency of power supply in other countries may be different from those in my country. For example, there are single-phase 100V/60Hz, three-phase 200V/60Hz, etc., standard voltage and frequency AC power supply The power source is called power frequency alternating current.

Generally, a device that converts power-frequency AC power with a fixed voltage and frequency into AC power with variable voltage or frequency is called a “frequency converter”.

In order to generate variable voltage and frequency, the device first converts the alternating current of the power supply to direct current (DC), a process called rectification.

A general inverter is an inverter power supply that converts a DC power supply into a certain frequency and a certain voltage. For inverters with adjustable frequency and voltage, we call them frequency converters.

The waveform output by the frequency converter is an analog sine wave, which is mainly used for speed regulation of three-phase asynchronous motors, also called frequency conversion speed regulator.

For variable frequency inverters that are mainly used in instrumentation testing equipment with high waveform requirements, the waveforms must be sorted out, and standard sine waves can be output, which is called variable frequency power supply. Generally, the frequency conversion power supply is 15–20 times the price of the frequency converter.

Frequency converters can also be used in home appliances. Home appliances that use inverters include not only motors (such as air conditioners, etc.), but also fluorescent lamps and other products.

A frequency converter for motor control that can vary both voltage and frequency. But frequency converters for fluorescent lamps are mainly used to adjust the frequency of the power supply.

The working principle of frequency converter is widely used in various fields. For example, the power supply of computer power supply, in this application, the frequency converter is used to suppress the reverse voltage, frequency fluctuation and instantaneous power failure of the power supply.

The frequency converter mainly adopts the AC-DC-AC mode (VVVF frequency conversion or vector control frequency conversion). electric motor.

The frequency converter is mainly composed of rectification (AC to DC), filtering, inverter (DC to AC), braking unit, drive unit, detection unit, micro-processing unit, etc.

 

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