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Variable frequency electrical appliances field load mainly for speed-regulating motor, in addition to the output power size, the main circuit topology similar to the basic, so the following mainly to the main variable frequency air-conditioning introduction.
The frequency conversion air conditioner mainly consists of two parts, the inside machine and the outer machine, internal machine is mainly composed of central processing Unit and fan, responsible for air-conditioning control and indoor wind, external machine is mainly through the compressor and fan to complete the heat exchange, so as to achieve refrigeration or heating, the power of the external machine to occupy the whole air-conditioning power consumption of the main part. Inverter air-conditioning principle and inverter similar to the control of the compressor is dependent on the internal IGBT switch to adjust the output power voltage and frequency, according to the actual needs of the motor to provide its required power supply voltage, and then to achieve energy saving, speed regulation purposes.

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Air conditioning refrigeration work schematic diagram: